Consulta: subjectFacets:"Leaf anatomy"
Registros recuperados: 50
Data/hora: 11/06/2024 11:50:50

New insight into how thigmomorphogenesis affects Epipremnum aureum plant development
Provedor de dados: 75
Autores: Benedetto,Adalberto Di; Galmarini,Claudio; Tognetti,Jorge.
ABSTRACT Climbing Epipremnum aureum plants develop larger leaves than unsupported, hanging plants. This effect may be regarded, in part, as a thigmomorphogenic response, but gravimorphogenetic effect may also be involved, since polar auxin transport is known to be negatively affected in plants with horizontal or hanging stems, which may result in an altered hormone balance at the whole plant level. The present work was aimed at studying how exogenous auxins and cytokinins may influence growth of E. aureum rooted cuttings under different training systems. Rooted cuttings of E. aureum were cultivated either climbing on an upright wooden board or creeping on the glasshouse bench or hanging from a basket. All leaves of each plant were sprayed to run-off at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Citokinin; Foliage plants; Gravitropism; Leaf growth; Leaf anatomy; Photosynthesis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300330

Systematic leaf anatomy of Baccaurea, Distichirhops, and Nothobaccaurea (Euphorbiaceae)
Provedor de dados: 16
Autores: Bodegom, S.; Haegens, R.M.A.P.; Heuven, B.J. van; Baas, P.
The leaf anatomical diversity of the genera Baccaurea Lour. (43 species), Distichirhops Haegens (3 species) and Nothobaccaurea Haegens (2 species) (Euphorbiaceae) is described. Two species of Aporosa and three species of Maesobotrya were examined for comparison. The following characters are important for the delimitation of species: hair types, the position of the glandular areas on the leaf margin, the hairiness and size of the glandular areas, the number of epidermal layers, the presence of (mucilage) idioblasts in the epidermis, the presence of palisade parenchyma above the vascular bundles, and the birefringence of the spongy parenchyma cell walls. However, leaf anatomy did not yield characters for distinction between the five genera studied. Phenetic...
Tipo: Article / Letter to the editor
Palavras-chave: Baccaurea; Distichirhops; Maesobotrya; Nothobaccaurea; Euphorbiaceae; Hairs; Leaf anatomy; Leaf glands; Systematics.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/525184

Revision of the Neotropical genus Pseudoxandra (Annonaceae)
Provedor de dados: 16
Autores: Maas, P.J.M.; Westra, L.Y.Th.
A taxonomic revision is made of the Neotropical genus Pseudoxandra. This genus forms part of the Cremastosperma alliance which consists of Bocageopsis, Cremastosperma, Ephedranthus, Klarobelia, Malmea, Mosannona, Onychopetalum, Oxandra, Pseudephedranthus, Pseudomalmea, Pseudoxandra, Ruizodendron, and Unonopsis, all from the Neotropics. Within Pseudoxandra 22 species are recognized, four of which were described quite recently by the first author (Maas et al., 1986). Fourteen species are described here as new. Two dichotomous keys are provided, one for the genera of the Cremastosperma alliance, and the other for the species of Pseudoxandra. The species treatments include descriptions, geographical and ecological notes, distribution maps, synonymy, taxonomic...
Tipo: Article / Letter to the editor
Palavras-chave: Annonaceae; Pseudoxandra; Leaf anatomy; Osteosclereids; Taxonomy.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/524896

Comparative morphology on leaves of Daphniphyllum (Daphniphyllaceae)
Provedor de dados: 16
Autores: Tang, M.-S.; Yang, Y.-P.; Sheue, C.-R.
A comparative anatomical study on the leaves of nine out of 29 species of the genus Daphniphyllum was performed to seek support for the present infrageneric classification. Daphniphyllum is composed of two sections, Lunata (with one subsection Lunata) and Daphniphyllum (with two subsections, Daphniphyllum and Staminodia). The glabrous leaves with brachyparacytic stomata appear in all species in this study; hemiparacytic, laterocytic or anomocytic stomata occur in some taxa. Two (out of three) species of section Lunata show irregular epidermal cells with undulate anticlinal walls on both surfaces and hemiparacytic stomata. Of section Daphniphyllum seven (out of 26) species were sampled; they have curved, straight or undulate anticlinal cell walls and...
Tipo: Article / Letter to the editor
Palavras-chave: Daphniphyllaceae; Daphniphyllum; Epidermis; Leaf anatomy; Lunata; Stomata.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/524761

Revision of the Neotropical genera Bocageopsis, Onychopetalum, and Unonopsis (Annonaceae)
Provedor de dados: 16
Autores: Maas, P.J.M.; Westra, L.Y.Th.; Vermeer, M.
(Annonaceae). The closeness of these three genera was expressed by Fries when he placed them in his (informal) Unonopsis group (Fries, 1959), and the close relationship is supported by more recent phylogenetic research as well. Four species are recognized in Bocageopsis and two species in Onychopetalum. Unonopsis is by far the largest of the three genera with close to 50 species, of which no less than 23 species are here described as new. One species (Unonopsis umbilicata) had to be shelved as insufficiently known for lack of data, and another, obviously new, species from Colombia is too incomplete and is described provisionally as Unonopsis spec. A. Several keys are provided, one for the genera and one each for the species of Bocageopsis and...
Tipo: Article / Letter to the editor
Palavras-chave: Annonaceae; Bocageopsis; Onychopetalum; Unonopsis; Leaf anatomy; Taxonomy.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/525887

Leaf plasticity in successive selection cycles of 'Saracura' maize in response to periodic soil flooding
Provedor de dados: 86
Autores: Souza,Thiago Corrêa de; Magalhães,Paulo César; Pereira,Fabrício José; Castro,Evaristo Mauro de; Silva Junior,Jessé Marques da; Parentoni,Sidney Neto.
The objective of this work was to assess the effect of successive selection cycles on leaf plasticity of 'Saracura' maize BRS-4154 under periodical flooding in field conditions. Soil flooding started at the six-leaf stage with the application of a 20-cm depth water layer three times a week. At flowering, samples of leaves were collected and fixed. Paradermic and transverse sections were observed under photonic microscope. Several changes were observed throughout the selection cycles, such as modifications in the number and size of the stomata, higher amount of vascular bundles and the resulting decrease of the distance between them, smaller diameter of the metaxylem, decrease of cuticle and epidermis thickness, decrease of number and size of bulliform...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Hypoxia; Leaf anatomy; Tolerance to flooding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000100003

Leaf blade quantitative anatomy of sugarcane cultivars and clones
Provedor de dados: 87
Autores: Ferreira,E.A.; Ventrella,M.C.; Santos,J.B.; Barbosa,M.H.P.; Silva,A.A.; Procópio,S.O.; Silva,E.A.M.
The objective of this study was to make a quantitative assess of the anatomic characteristics of leaf blade of the sugarcane cultivars RB855113, SP80-1842, SP80-1816, RB867515 and clone RB957689 presenting different sensitivity to the mixture of sodium trifloxysulfuron + ametryn herbicides. Compared to the other cultivars assessed, RB855113 cultivar, considered more sensitive to the herbicide mixture, presented relevant differences such as greater proportion of bulliform cells, greater tissue proportion in the transverse section of the leaf blade, greater stomata and trichome density on both surfaces, thinner epidermis on the adaxial surface and length of stomata on both surfaces. The external paraclinal wall of the bulliform cells was thinner than in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Herbicide; Saccharum sp.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582007000100003

STRUCTURAL EVALUATION OF DAMAGE CAUSED BY HERBICIDE CLOMAZONE IN LEAVES OF ARBORESCENT SPECIES NATIVE TO BRAZIL
Provedor de dados: 87
Autores: CABRAL,C.M.; SANTOS,J.B.; FERREIRA,E.A.; COSTA,S.S.D.; DALVI,V.C.; FRANCINO,D.M.T.
ABSTRACT Herbicide clomazone is highly soluble in water, which increases the risk of leaching, resulting in contamination of sources of groundwater and waterways, affecting non-target organisms, with possible degradation of riparian areas. The objective of this work was to investigate the possible anatomical modifications of the leaf tissue of twelve arborescent species native to Brazil grown in soil contaminated by clomazone, in order to microscopically characterize leaf damage caused by the herbicide, and investigate whether the structural damage precedes visible damage. Through micro morphometrics, the thickness and the area occupied by the tissues were measured in a cross section of the leaves of the forest species: adaxial and abaxial epidermis,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inga marginata; Handroanthus serratifolius; Forest species; Phytoremediation; Leaf anatomy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100230

Leaf anatomy of Araucaria angustifolia (Bertol.) Kuntze (Araucariaceae)
Provedor de dados: 88
Autores: Mastroberti,Alexandra A.; Mariath,Jorge E.A.
Immature and mature leaves of juvenile and adult plants of Araucaria angustifolia (Araucariaceae) were observed with the objective of updating the morphoanatomical data of the leaves of this species, which were restricted to basic descriptions in previous studies. The observations, made in optical allowed to establish anatomical differences among mature leaves of juvenile and adult plants in relation to the number of palisade parenchimal layers, the number of compartmented cells and the transfusion tissue development. Epidermis, the albuminous cells, the phloem, and the transfusion tissue descriptions are in disagreement with the data obtained data by different authors. The epidermal tissue and the hypodermis differ entirely when the plant is still...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria angustifolia; Araucariaceae; Leaf anatomy.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000300007

Anatomia foliar de espécies epífitas de Orchidaceae
Provedor de dados: 88
Autores: OLIVEIRA,VIRGINIA DEL CARMEN; SAJO,MARIA DAS GRAÇAS.
O mesofilo é formado por parênquima lacunoso e os feixes vasculares, maiores e menores, se dispõem intercaladamente, nas folhas de Orchidaceae estudadas (Catasetum fimbriatum Lindl., Dichaea bryophila Rchb. f., Encyclia calamaria (Lindl.) Pabst, Epidendrum campestre Lindl., E. secundum Jacq., Miltonia flavescens Lindl., Pleurothallis smithiana Lindl., Stanhopea lietzei (Regel) Schltr. e Vanda tricolor Lindl.). No mesofilo de quase todas as espécies ocorrem células esclerificadas adjacentes à epiderme, nas duas faces foliares. Também são comuns, nas folhas estudadas, caracteres estruturais que podem ser interpretados como adaptações ao hábito epifítico.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Orchidaceae; Epiphytism.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000300003

Estudo anatômico foliar do clone híbrido 4430 de Tradescantia: alterações decorrentes da poluição aérea urbana
Provedor de dados: 88
Autores: ALVES,EDENISE SEGALA; GIUSTI,PAULA MATTOS; DOMINGOS,MARISA; SALDIVA,PAULO H.N.; GUIMARÃES,ELIANE T.; LOBO,DÉBORA J.A.
Estudos epidemiológicos mostram uma relação entre a poluição aérea em centros urbanos e a taxa de doenças respiratórias na sua população. Em São Paulo, a concentração dos principais poluentes aéreos é monitorada pela CETESB porém, tais dados não dão idéia do risco ao qual a população está sujeita; plantas bioindicadoras podem dar idéia deste risco. O clone híbrido 4430 de Tradescantia vem sendo utilizado em bioensaios (Trad-MCN, Trad-SH) que avaliam o efeito genotóxico de várias substâncias. Não há registros das potencialidades de bioindicação relativas à estrutura das folhas do clone. Este estudo objetivou estabelecer o padrão estrutural da folha do clone e verificar se existem características anatômicas afetadas pela poluição, que podem ser utilizadas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urban air pollution; Tradescantia; Clone 4430; Leaf anatomy; Biomonitoring.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000500012

Leaf tissues degradation of signalgrass hay pretreated with urea and submitted to in vitro digestion
Provedor de dados: 96
Autores: Gobbi,Kátia Fernanda; Garcia,Rasmo; Ventrella,Marília Contin; Garcez Neto,Américo Fróes; Pereira,Odilon Gomes.
An experiment using signalgrass hay treated with increasing urea levels (0, 20, 40, and 80 g/kg of dry matter), and submitted to in vitro digestion times (0, 6, 12, 24 or 72 hours) was conducted to evaluate the effects of ammoniation rates and digestion times on leaf blade tissue degradation. A completely randomized design with a 4 × 5 factorial treatment arrangement, with three replicates was used. Data were submitted to multivariate analysis. Urea-treated hay presented smaller proportion of remaining tissues measured in leaf blades cross-sections after in vitro digestion. Tissues more affected by urea treatment degradation were parenchyma bundle sheath and sclerenchyma. The hay treated with 80 g urea/kg DM and in vitro digested for 24 or 72 hours showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammoniation; Brachiaria decumbens; C4 grass; Histological analyses; Leaf anatomy.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008000500004

Productive and vegetative behavior of olive cultivars in super high-density olive grove
Provedor de dados: 63
Autores: Proietti,Primo; Nasini,Luigi; Reale,Lara; Caruso,Tiziano; Ferranti,Francesco.
In recent years, there has been an increase in interest in super high-density (SHD) olive (Olea europaea L.) groves because they offer early entry into production, increased productivity and the possibility of using modified mechanical vine harvesters. This study was carried out in a young SHD olive grove to examine vegetative, histo-anatomical and productive characteristics and oil quality of the Spanish Arbequina and Italian Maurino and Leccino cultivars, characterized by low, low-to-medium and high vigor, respectively. Arbequina had low vigor and limited development in height and width, as well as a high leaf/wood ratio. Maurino had a canopy volume similar to that of Arbequina and, despite a great tendency to grow in height, had low vigor, a rather...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canopy architecture; Leaf anatomy; Leaf area index; Oil quality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100020

Foliar anatomy of Rhynchosia spp. (Leguminosae, Papilionoideae) from Roraima state, northern Brazilian Amazon
Provedor de dados: 36
Autores: FLORES,Andréia Silva; COSTA,Eduardo de Souza; DIAS,Germana Bueno.
ABSTRACT Comparative studies on the structure of foliar anatomy in four species of Rhynchosia from Roraima state (northern Brazilian Amazon) were carried out to identify additional morphological characters to support the definition of the systematic boundaries among the species. Fully expanded leaves, including the petioles, were collected from the upper nodes of a plant’s stem. Anatomical characters were observed in cross-sections of the middle portion of leaflets and petiole segments. Presence and distribution of glandular trichomes, continuity of sclerenchyma around the vascular bundles in leaflet blades and the conformation of the area between the two ridges of petioles were important characters to distinguish among the species of Rhynchosia. For the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; Phaseoleae; Morphology; Leaf anatomy; Neotropics.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000100028

LEAF TRAITS AND PLASTIC POTENTIAL OF PLANT SPECIES IN A LIGHT-EDAPHIC GRADIENT FROM RESTINGA IN SOUTHERN BRAZIL
Provedor de dados: 37
Autores: Ferreira de MELO JÚNIOR,João Carlos; Torres BOEGER,Maria Regina.
Restinga formations grow on sandy spits of coastal plains, an environment whose conditions limit the growth and development of vegetal species. Studies on restinga gradients are good examples of how plants acclimate to restrictive environments. This work compares three woody species co-occurring in four vegetations of a restinga from Southern Brazil. It pinpoints morpho-anatomical attributes that favor the survival of species faced with spatial variability of soil and light conditions. Results indicate that they respond differently to environmental variables on different scales. The plastic response of morphological attributes is more marked than that of anatomical ones. Varronia curassavica and Dodonaea viscosa showed more xeromorphic features on the more...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal vegetation; Leaf morphology; Leaf anatomy; Light and soil conditions.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000100005

LEAF ANATOMY CHARACTERIZATION OF FOUR Apochloa SPECIES: A C3 GENUS RELATED TO EVOLUTION OF C4 PATHWAY IN GRASSES
Provedor de dados: 37
Autores: MENDONÇA,Ane Marcela das Chagas; VIANA,Pedro Lage; BARBOSA,João Paulo Rodrigues Alves Delfino.
ABSTRACT Leaf anatomy characteristics provide important evidences about the transition between C3 and C4 pathways. The C4 photosynthesis pathway allowed to reduce the C3 photorespiratory rate, concentrating CO2 around the Rubisco site and using structures and machinery already presented in C3 plants. In monocots, it is observed a high number of C4 lineages, most of them phylogenetically related to C3 groups. The genus Apochloa (C3), subtribe Arthropogoninae, is related to two C4 genera Coleataenia and Cyphonanthus. The aim of this study was to evaluate four Apochloa species in order to establish anatomical characteristics related to the evolution of C4 pathway in this group. By means of transverse sections fully expanded leaves of A. euprepes, A. lorea, A....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apochloa spp; C4 photosynthesis; Leaf anatomy; Poaceae; Subtribe arthropogoninae.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000100012

Comparative leaf anatomy of some species of Abies and Picea (Pinaceae)
Provedor de dados: 39
Autores: Ghimire,Balkrishna; Lee,Chunghee; Yang,Jongcheol; Heo,Kweon.
ABSTRACTA number of conifer species are still lacking anatomical data, which is significant because morphological and anatomical data are essential for systematic study. Leaf anatomy was studied in selected species of Abiesand Piceausing light and scanning electron microscopy. Both genera were found to have typical coniferous and highly xerophytic leaves with sunken stomata and an epidermis covered by a thick cuticle. In the genus Abies, species can be differentiated by the nature of the lignified hypodermis and the number and position of resin ducts. Abies firma and A. holophylla have a continuous hypodermis whereas in A. koreana and A. nephrolepis the hypodermis is discontinuous and represented by isolated cells or groups of four or five cells. On the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abies; Leaf anatomy; Picea; Scanning electron microscopy; Taxonomy.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300346

In situ variation in leaf anatomy and morphology of Andira legalis (Leguminosae) in two neighbouring but contrasting light environments in a Brazilian sandy coastal plain
Provedor de dados: 39
Autores: Pereira,Daniela Carvalho; Barros,Cláudia Franca; Scarano,Fabio Rubio.
Andira legalis (Vell.) Toledo is a legume shrub widespread along the sandy plains of the Brazilian coast. It occurs both shaded, in forest habitats, or exposed to full sunlight, in the vegetation islands growing on sand deposits. Previous studies reported a high range of morpho-physiological variation for this species along a geographical gradient. This study compared leaf morphology and anatomy of A. legalis in two distinct but adjacent light environments: a dense forest (shaded) and a scrub of Palmae (exposed). We studied the amplitude of variation for these traits within a small (0.5 ha) geographical area. Leaf anatomy parameters were measured for five leaves collected from five plants in each habitat. The parameters measured were leaf and mesophyll...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Andira legalis; Atlantic forest; Leaf anatomy; Restinga; Sun-shade plants.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000100028

Leaf structure, microanalysis and characterization of the latex protein profile of Pachystroma longifolium (Nees) I.M. Jonhst. (Euphorbiaceae) in a seasonally dry Atlantic Forest
Provedor de dados: 39
Autores: Rabelo,Guilherme Rodrigues; Marques,Jonas de Brito Campolina; Zottich,Umberto; Dias,Germana Bueno; Miguel,Emílio Castro; Gomes,Valdirene Moreira; Da Cunha,Maura.
Pachystroma longifolium is an evergreen species of Euphorbiaceae that occurs in tabuleiro forest, a type of lowland Atlantic Forest. The site chosen for this study was a fragment of tabuleiro forest that has a history of being selectively logged for timber. P. longifolium is very successful at colonizing disturbed areas in this forest fragment in comparison with preserved fragments. In the present work, which was based on using different microscopy (electron and light microscopy, X-ray analysis) and biochemistry techniques, we describe the leaf and latex traits of P. longifolium and their role as defense mechanisms against desiccation and herbivory. Our results suggest the richness of P. longifolium populations, in the disturbed forest area studied, is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomical strategies; Crystals; Cuticles; Laticifers; Leaf anatomy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000100018

Anatomia foliar de Eugenia sulcata Spring ex Mart. (Myrtaceae)
Provedor de dados: 39
Autores: Machado,Raul D; Costa,Cecília G; Fontenelle,Gerusa B.
A lâmina foliar de Eugenia sulcata Spring ex Mart, é analisada, ressaltando-se aspectos de suas epidermes, à luz da microscopia óptica e da microscopia eletrônica de transmissão e de varredura. As paredes anticlinais destas células são sinuosas e as periclinais externas têm espessura não uniforme, em decorrência de projeções internas destas paredes. Ao microscópio eletrônico de transmissão tais paredes apresentam-se constituidas por 3 camadas distintas. O microscópio eletrônico de varredura mostra completa ausência de estriações na superfície externa da epiderme abaxial. Os estômatos são classificados como anomoestaurocíticos quanto ao numero e arranjo das células subsidiárias e considerados graminóides em função do espessamento desigual das células...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrtaceae; Leaf anatomy.
Ano: 1987
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300026

Comparative leaf anatomy and micromorphology of Psychotria species (Rubiaceae) from the Atlantic Rainforest
Provedor de dados: 39
Autores: Moraes,Tarsila Maria da Silva; Rabelo,Guilherme Rodrigues; Alexandrino,Camilla Ribeiro; Silva Neto,Sebastião José da; Da Cunha,Maura.
The genus Psychotria comprises approximately 2,000 species that are mostly shrubs distributed in forests of the tropics and subtropics. Within the Rubiaceae, Psychotria is well known for its species that produce bioactive alkaloids and for its taxonomic complexity. The anatomical and micromorphological characters of the leaves of P. hoffmannseggiana, P. carthagenensis, P. deflexa, P. glaziovii, P. leiocarpa, P. racemosa, and P. vellosiana were investigated and described to understand the interspecific variation of these species, which will contribute to the systematics of the genus. Principal component analysis (PCA) and unweighted pair group method analysis (UPGMA) indicated four groups based on the presence or absence of some of the characters studied....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Cluster analysis; Principal component analysis; Systematic anatomy; Domatia; Leaf surface morphology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000100021

Structural changes in Psidium guajava 'Paluma' leaves exposed to tropospheric ozone
Provedor de dados: 39
Autores: Tresmondi,Fernanda; Alves,Edenise Segala.
Psidium guajava 'Paluma' has being tested as an ozone (O3) bioindicator and responds with pigmentation between the veins on the adaxial surface, due to the accumulation of phenolic compounds. These compounds act as non-enzymatic antioxidants that neutralize reactive oxygen species (ROS), formed from O3. This study aimed to evaluate the leaf structure of plants with and without visible symptoms and to establish these symptoms at the cellular level. Beside this we also aimed to detect structural changes that can minimize the effects of the O3 on the plant. The accumulation of phenolic substances, stomatal density and structural changes in P. guajava 'Paluma' leaf tissues exposed during the four seasons of the year were evaluated. The study was conducted at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicator; Phenols; Leaf anatomy; Oxidative stress; Stomatal density.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000300005

Leaf anatomy and histochemistry of Macropeplus dentatus (Perkins) I. Santos &amp;amp; Peixoto and Macropeplus ligustrinus (Tul.) Perkins (Monimiaceae)
Provedor de dados: 39
Autores: Costa,Fernanda Flores; Lima,Helena Regina Pinto; Cunha,Maura Da; Santos,Inês da Silva.
The Monimiaceae is represented in the Neotropical region by six genera. Macropeplus Perkins is a Brazilian genus comprising four species restricted to high-montane Atlantic Forest areas, which have not been properly examined from the anatomical point of view. This study characterizes the anatomical structure and histochemical aspects of the leaves of Macropeplus dentatus and M. ligustrinus, and adds to our taxonomic knowledge ofthe genus. The individuals studied were collected in the Serra dos Órgãos National Park and in the Caraça Natural Park in southeastern Brazil. Among the characteristics common to the two species, hypostomatic leaves, dorsiventral structure, paracytic stomata, a subepidermal layer, collateral vascular system in the form of an arc in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Rain Forest; Histochemistry; Leaf anatomy; Macropeplus; Monimiaceae.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000300027

Structural and functional leaf traits of two Gochnatia species from distinct growth forms in a sclerophyll forest site in Southeastern Brazil
Provedor de dados: 39
Autores: Rossatto,Davi Rodrigo; Kolb,Rosana Marta.
Gochnatia is very common in different phytophysiognomies in the Cerrado of São Paulo State, occupying open and closed areas. In this study, we compared the leaf anatomy and some ecophysiological traits of two species of Gochnatia, one a shrub (Gochnatia barrosii Cabrera) and the other a tree (Gochnatia polymorpha (Less.) Cabrera), which both occur in an area of "cerradão" at the Estação Ecológica de Assis, SP. We found qualitative structural differences between the species, with G. barrosii presenting amphistomatic leaves with a uniseriate epidermis and G. polymorpha showing hypostomatic leaves and a multiple epidermis or hypodermis on the adaxial surface. Moreover, the G. barrosii leaves had lower values in tissue thickness (with the exception of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Gas exchange; Leaf anatomy; Stomata.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000400014

Características anatômicas foliares de plantas de orégano (Origanum vulgare L.) submetidas a diferentes fontes e níveis de adubação orgânica - DOI: 10.4025/actasciagron.v31i3.690
Provedor de dados: 1
Autores: Corrêa, Ricardo Monteiro; IFMG; Pinto, José Eduardo Brasil Pereira; UFLA; Reis, Érika Soares; IFMG; Oliveira, Cynthia de; UFLA; Castro, Evaristo Mauro de; UFLA; Brant, Renata da Silva; UFLA.
Objetivou-se avaliar a influência de níveis de adubos orgânicos bovino e avícola no teor de clorofila e características anatômicas de folhas de plantas de orégano cultivadas em casa-de-vegetação. Foram conduzidos dois ensaios separadamente, sendo um com esterco bovino e o outro com esterco de aves. Plantas de orégano (Origanum vulgare L.) foram cultivadas em vasos de 10 L, submetidas aos seguintes tratamentos: Ensaio I: esterco bovino: 1) solo sem adubação (controle); 2) solo + 3,0 kg m-2 de esterco bovino; 3) solo + 6,0 kg m-2 de esterco bovino; 4) solo + 9,0 kg m-2 de esterco bovino; 5) solo + 12,0 kg m-2 de esterco bovino; Ensaio II – esterco avícola: 1) solo sem adubação (Controle); 2) solo + 1,5 kg m-2 de esterco de galinha; 3) solo + 3,0 kg m-2 de...
Palavras-chave: 5.01.00.00-9    Agronomia Origanum vulgare L.; Planta condimentar; Fertilização orgânica; Anatomia foliar; Clorofila Origanum vulgare L.; Spice plant; Organic fertilization; Leaf anatomy; Chlorophylls.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/690

Are sun- and shade-type anatomy required for the acclimation of Neoregelia cruenta?
Provedor de dados: 42
Autores: REINERT,FERNANDA; LEAL-COSTA,MARCOS V.; JUNQUEIRA,NICIA E.; TAVARES,ELIANA S.
Sun and shade plants are often discriminated by a number of sun- and shade-type anatomies. Nonetheless, we propose that among tank-bromeliads, changes in rosette architecture satisfy the requirements for coping with contrasting light levels. The tank-bromeliad Neoregelia cruenta naturally colonises sub-habitats ranging from full exposure to direct sunlight, to shaded environments in sand ridge plains. We quantified anatomical and morphological traits of leaves and rosettes of N. cruenta grown under sun and shade conditions. Cells with undulated lateral walls within the water parenchyma are for the first time described for the family. Under high light, leaf blades were wider, shorter, and yellowish. The rosette diameter of sun plants was less than half that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromeliaceae; Crown architecture; Leaf anatomy; Plant morphology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200561

Morphoanatomical injuries in Pistia stratiotes L. (Araceae) as a result of exposure to clomazone in water
Provedor de dados: 42
Autores: RIBEIRO,VICTOR HUGO VIDAL; COUTINHO,ÍTALO ANTÔNIO COTTA; ALENCAR,BRENDA THAIS BARBALHO; CABRAL,CÁSSIA MICHELLE; SANTOS,JOSÉ BARBOSA DOS; FERREIRA,EVANDER ALVES; FRANCINO,DAYANA MARIA TEODORO.
Abstract  Contamination of water sources due to herbicide is of great concern. Clomazone is a pesticide with a high contamination potential which could possibility lixiviate to water streams. Changes caused by residual herbicide include flora modifications which are generally detrimental for some species. The lack of morphological studies performed in aquatic plants exposed to herbicide-contaminated environments has encouraged the development of our research. For the first time, we present a study that aimed to evaluate leaf injuries visible to the naked eye as well as microscopical effects which may be caused by clomazone on Pistia stratiotes. Pistia stratiotes was subjected to five concentrations of clomazone. Our analysis showed leaf injuries,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic macrophyte; Clomazone; Herbicide; Hormesis; Leaf anatomy; Water lettuce.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000201003

Morphometric differences of Microgramma squamulosa (Kaulf.) de la Sota (Polypodiaceae) leaves in environments with distinct atmospheric air quality
Provedor de dados: 42
Autores: ROCHA,LEDYANE D.; COSTA,GUSTAVO M. DA; GEHLEN,GÜNTHER; DROSTE,ANNETTE; SCHMITT,JAIRO L.
Plants growing in environments with different atmospheric conditions may present changes in the morphometric parameters of their leaves. Microgramma squamulosa (Kaulf.) de la Sota is a neotropical epiphytic fern found in impacted environments. The aims of this study were to quantitatively compare structural characteristics of leaves in areas with different air quality conditions, and to identify morphometric parameters that are potential indicators of the effects of pollution on these plants. Fertile and sterile leaves growing on isolated trees were collected from an urban (Estância Velha) and a rural (Novo Hamburgo) environment, in Rio Grande do Sul, Brazil. For each leaf type, macroscopic and microscopic analyses were performed on 192 samples collected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atmospheric pollution; Bioindicator; Epiphytism; Fern; Leaf anatomy.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301137

Diagnostic and prognostic characteristics of phytotoxicity caused by fluoride on Spondias dulcis Forst. F. (Anacardiaceae)
Provedor de dados: 42
Autores: Sant'Anna-Santos,Bruno F.; Azevedo,Aristéa A.; Silva,Luzimar C.; Oliva,Marco A.
The goal of this study was to determine the symptoms and microscopic damage caused by fluoride on Spondias dulcis, a fluoride-sensitive species. The plants were exposed to simulated fog with fluoride (0, 5, 10, 15 and 20 mg L-1) for 20 min daily during four consecutive days. Samples from leaflets without any apparent fluoride injury were collected to microscopic analysis. The percentage of necrosed leaf area was measured, and the level of pollutant in the dry matter from the basal and apical portions of the plant was determined. The necroses began 24 h after the first simulation mainly from the base of the leaflets. A higher level of necrosis was observed at the apical portion of the plants, a region of higher fluoride accumulation. The damage on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Bioindicator; Necrosis; Pollution; Symptomatology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300011

Leaf anatomy and its contribution to the systematics of Aechmea subgenus Macrochordion (de Vriese) Baker (Bromeliaceae)
Provedor de dados: 42
Autores: Faria,Ana Paula G. de; Vieira,Ana Claudia M.; Wendt,Tânia.
The leaf anatomy of the species Aechmea subgenus Macrochordion was analyzed to obtain valuable data on their taxonomic delimitation and to identify anatomical adaptations to their respective habitats and habits. All leaves of these species are hypostomatic, and present: peltate trichomes on both surfaces; stomata sunk in epidermal depressions; small epidermal cells with thick walls and inclusions of silica bodies; a mechanical hypodermis; an aquiferous parenchyma; chlorenchyma with fibrous clusters and air channels; and vascular bundles surrounded by a parenchymatic sheath and a cap of fibers. The results are evaluated within an adaptive and taxonomic context. Variations in hypodermic thickening, amount of water parenchyma, position of the air channels and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aechmea; Bromeliaceae; Leaf anatomy; Macrochordion.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400011

Effects of atmospheric pollutants on somatic and germ cells of Tradescantia pallida (Rose) D.R. HUNT cv. purpurea
Provedor de dados: 42
Autores: CRISPIM,BRUNO A.; SPÓSITO,JULIANA C.V.; MUSSURY,ROSILDA M.; SENO,LEONARDO O.; GRISOLIA,ALEXÉIA B.
Anatomical alterations in leaves and DNA damage in cells caused by the accumulation of atmospheric pollutants can be measured by epidermal leaf analyses and Tradescantia micronuclei assay with early pollen tetrad cells. The present study examined the feasibility of using somatic and germ cells of Tradescantia pallida for biomonitoring purposes in the city of Dourados, state of Mato Grosso do Sul (MS), Brazil. Stomatal, micronucleus and epidermal leaf analyses were performed, using standard methodologies, on plants growing at three locations during six different time periods. Tradescantia micronuclei data were analyzed using SAS 9.2 software package and stomatal data were analyzed using SANEST software. Analyses of stomatal characteristics and micronuclei...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomonitoring; Leaf anatomy; Air pollution; Micronuclei.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401899

Leaf blade anatomy and ultrastructure of six Simira species (Rubiaceae) from the Atlantic Rain Forest, Brazil
Provedor de dados: 47
Autores: Moraes,Tarsila Maria da Silva; Barros,Claudia Franca; Neto,Sebastião José da Silva; Gomes,Valdirene Moreira; Da Cunha,Maura.
Simira is a predominantly woody Neotropical genus comprising 41 taxa, 16 of which occur in Brazil and eight of them in the southeastern region of Brazil. Leaf blades of Simira eliezeriana Peixoto, S. glaziovii (K. Schum.) Steyerm., S. grazielae Peixoto, S. pikia (K. Schum.) Steyerm., S. rubra (Mart.) Steyerm., S. sampaioana (Standl.) Steyerm.were collected in the southeastern region of Brazil and fixed according to usual methods for light and electron microscopy. The leaf blades show typical characteristics of the Rubiaceae family as dorsiventral mesophyll and paracytic stomata. The presence of two bundle sheaths that extend to the upper epidermal layer, prismatic crystal and crystal-sand, alkaloids in the mesophyll and the organization micromorphological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Structure; Morph-anatomy.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000300004

Leaf Morphoanatomy of Diploon Cronquist (Sapotaceae Juss.)
Provedor de dados: 49
Autores: Lima,Renata Gabriela Vila Nova de; Lima,Liliane Ferreira; Ferreira,Angélica Cândida; Araújo,Josiane Silva; Zickel,Carmen Silvia.
Abstract: Diploon is a monospecific genus represented by Diploon cuspidatum, an arboreal species that has morphological characteristics distinct from those of other Sapotaceae species. In this study, Diploon cuspidatum leaves were characterized morphoanatomically in order to reveal additional diagnostic characters of their external morphology of the genus. The Diploon petiole presents shape and arrangement of the vascular system flat-convex, occasionally with one or two accessory bundles, many laticifers, and many prismatic crystals. The midrib is biconvex with a U-shaped cuticle on the abaxial side, and laticifers are associated with the vascular tissues. Mesophyll is dorsiventral, palisade parenchyma has two cell layers, T- and Y-shaped malpighiaceous...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Leaf architecture; Micromorphology; Taxonomy; Chrysophylloideae.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100202

A new synonym for Micropholis gardneriana (Sapotaceae) with complete description, anatomy and distribution notes
Provedor de dados: 49
Autores: Ferreira,Angélica Cândida; Araújo,Josiane Silva; Almeida Jr,Eduardo Bezerra de; Zickel,Carmen Silvia.
Abstract: In the present work, we synonymize Micropholis compta under M. gardneriana due to the overlap of morphoanatomical characters and the absence of distinctive attributes, verified during taxonomic and anatomical study of the genus Micropholis for Brazil. This study provides an updated description of M. gardneriana, including macro- and micro-morphological data, a distribution map, and comments on conservation status, ecological and taxonomy.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Chrysophylloideae; Leaf anatomy; Neotropics; South America; Taxonomy.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100501

Anatomía foliar y caulinar en especies de Stemodia (Scrophulariaceae)
Provedor de dados: 51
Autores: Sosa,Maria De Las Mercedes.
Se describe la estructura anatómica foliar y caulinar en el género Stemodia. Son consideradas siete especies: S. ericifolia (Kuntze) K. Schum., S. hyptoides Cham. &amp;amp; Schltdl., S. lanceolata Benth., S. lobelioides Lehm., S. palustris A. St.-Hil., S. stricta Cham. &amp;amp; Schltdl. y S. verticillata (Mill.) Hassl. Se hallaron diferencias en la epidermis foliar, donde hay variación en el tipo de estomas y de tricomas, y en la forma de las papilas epidérmicas; también en la estructura del mesofilo. Se describen e ilustran cuatro tipos de tricomas considerando si son o no glandulares y el número de células que lo conforman. El estudio de la anatomía caulinar mostró diferencias en cuanto a la presencia de aerénquima cortical y de laguna medular, y el...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Stem anatomy; Trichomes; Stemodia; Scrophulariaceae; Anatomía foliar; Anatomía caulinar; Tricomas; Stemodia; Scrophulariaceae.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722005000100007

Leaf anatomy of Gaillardia cabrerae (Asteraceae): Basic plan and comparative study of two contrasting habitat populations
Provedor de dados: 51
Autores: Beinticinco,Laura; Prina,Anibal; Alfonso,Graciela.
This study evaluates the leaf anatomy pattern of Gaillardia cabrerae Covas, an exclusive endemic camephyte from the Lihué Calel National Park, province of La Pampa, Argentina. Leaf cross sections and peelings of plants growing in two different populations were used to determine the basic leaf anatomy patterns and to estimate the influence of growth conditions in the two microhabitats. The analysis showed differences in epidermal cells area, stomata density and main diameter, lacunar parenchyma cells and central vascular bundle diameter and palisade parenchyma cells dimensions. These aspects might be reflecting environmental conditions of the populations, especially sun exposure and soil moisture. The results provide information on the relationship of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Endemism; Lihué Calel National Park.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722011000100003

The effects of sooty mold on photosynthesis and mesophyll structure of mahogany (Swietenia macrophylla King., Meliaceae)
Provedor de dados: 53
Autores: Lemos Filho,José Pires de; Paiva,Élder Antônio Sousa.
The aim of present study was to evaluate the effects of the sooty mold on anatomy and photochemical activity of mahogany (Swietenia macrophylla) leaves. The photochemical features of shade-developed leaves with or without sooty mold were compared to those of sun leaves using chlorophyll a fluorescence measurements. Leaf anatomy was also evaluated using conventional techniques. The degree of blockage of the photosynthetic active photon flux density (PPFD) by sooty mold and its effect on photochemistry were evaluated. Sun leaves showed thick mesophyll with palisade parenchyma disposed in a uniseriate layer, whereas shade leaves showed narrow mesophyll, independently of sooty mold presence. The effective quantum yield (deltaF/Fm') and the apparent electron...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll fluorescence; Leaf anatomy; Photochemical activity.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052006000100003

Leaf Structure and Taxonomy of Petunia and Calibrachoa (Solanaceae)
Provedor de dados: 52
Autores: Reis,Claudia dos; Sajo,Maria das Graças; Stehmann,João Renato.
We studied the leaf anatomy of sixteen species of Calibrachoa and eight species of Petunia. In Calibrachoa leaves, the vascular bundles sheath (endodermis) was formed by parenchymatous developed cells, different from those of the mesophyll. In Petunia, this sheath did not show a marked morphological differentiation. The Calibrachoa leaves could be separated according to the type of leaf margins, the distribution of the stomata on leaf surfaces, the organization of the mesophyll and the morphology of the trichomes. Based on these results, an indented dichotomous identification key was elaborated for the species of the genus Calibrachoa.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanaceae; Calibrachoa; Petunia; Leaf anatomy; Taxonomy.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100010

Use of Frozen Leaves for Morpho-anatomical Characterization of Nectandra megapotamica (Spreng.) Mez., Lauraceae
Provedor de dados: 52
Autores: Costa,Leonardo Severo da; Reiniger,Lia Rejane Silveira; Trindade,Helena; Heinzmann,Berta Maria; Bianchini,Nadia Helena.
Abstract Nectandra megapotamica (Spreng.) Mez. it is a native tree species of the Atlantic Forest, commonly known as canela-preta. The species has some anti-inflammatory, antitumor and antirheumatic properties among others. In this work the use of frozen plant material for microscopy analysis was tested. In addition, the leaf morpho-anatomy of the species was characterized which allowed to perform a structural description and to identify structures of secretion and storage of essential oil. The plant material was prepared for analyzes in optical, fluorescence and scanning electron microscopy. The leaf anatomy shows glabrous epidermis, unistratified, paracytic stomata, absence of trichomes, polyhedral epidermal cells. Some typical family characteristics...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest species; New methodology; Leaf anatomy; Essential oil; Secretory cavities.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100423

The influence of light intensity on anatomical structure and pigment contents of Tradescantia pallida (Rose) Hunt. cv. purpurea Boom (Commelinaceae) leaves
Provedor de dados: 52
Autores: Paiva,Élder Antonio Sousa; Isaias,Rosy Mary dos Santos; Vale,Fernando Henrique Aguiar; Queiroz,Cristina Generosa de Senna.
The aim of this work was to study the effects of five different light intensities on the anatomical structure and on the pigment contents in leaves of Tradescantia pallida cv. purpurea. Once light intensity became lower, the thickness of leaf lamina and mesophyll were reduced. Adjustments in light-harvesting antenna size were observed: an increase in chlorophyll a + b/carotenoids ratio at low-light growth conditions. There was a strong positive linear correlation between the light intensity values and anthocyanin contents. Hence, T. pallida cv. purpurea acclimation to distinct environmental conditions might be related to its capacity of altering structurally and physiologically its phenotype.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Light intensity; Chlorophyll; Carotenoids; Anthocyanin; Tradescantia.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400017

Structural analysis of Castanea sativa Mill. leaves from different regions in the tree top
Provedor de dados: 52
Autores: Pinto,Teresa Maria; Anjos,Maria do Rosário; Martins,Nuno Miguel; Gomes-Laranjo,José; Ferreira-Cardoso,Jorge; Peixoto,Francisco.
The aim of this work was to perform the histological characterization of the C. sativa leaves of three Portuguese cultivars to establish comparison among the leaves of the different quadrants in accord and with the cardinal points of the tree top and among different cultivars of this species, using light microscopy (OM) and scanning electron microscopy (SEM). Measurements were also carried out for the leaf tissue thickness, stomatal density, leaf area in the four tree top quadrants. The leaves turned to the North had lesser thickness of mesophyll mainly due to lower amount of palisade parenchyma. The stomatal density was significantly lower in these leaves, unlike the leaf area that has the highest expression.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C. sativa; Leaf anatomy; Palisade parenchyma; Spongy parenchyma; Stomatal density; Scanning electron microscopy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100016

Leaf morphology of 89 tree species from a lowland tropical rain forest (Atlantic forest) in South Brazil
Provedor de dados: 52
Autores: Boeger,Maria Regina Torres; Alves,Luiz Carlos; Negrelle,Raquel Rejane Bonatto.
We examined the leaf morphology and anatomy of 89 tree species growing in an area of coastal Atlantic Forest in South Brazil. The majority of the species (&gt; 75%) had small (notophyll and microphyll) elliptical simple leaves with entire margins. These leaves presented a typical anatomical structure consisting of a single epidermal cell layer, single palisade parenchyma cell layer, and spongy parenchyma with 5 to 8 cell layers. The sclerenchyma was limited to the vascular bundles. The majority of the tree species (91%) had leaves with mesomorphic characteristics. Few species depicted leaves with xeromorphic features as would be expected in such oligotrophic sandy soil. These mesomorphic features appeared to be associated to high efficiency mechanisms for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf morphology; Leaf anatomy; Lowland tropical forest; Atlantic Forest.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600013

A method to improve leaf succulence quantification
Provedor de dados: 52
Autores: Mantovani,André.
Leaf succulence has important physiological and ecological implications. Currently it is quantified by Delf's index (fresh weight/leaf area) and fresh weight/ dry weight ratio. Both indeces are reconsidered and a new index is proposed. Shade and sun leaves from terrestrial, hemiepiphytic and epiphytic aroids were studied. Delf's formula, which does not consider dry weight, overestimated leaf succulence. As fresh weight / dry weight ratio (fw / dw) does not consider leaf area, plants with the same fw / dw ratio were more than five times different in area. The last case was only possible with a decrease in surface / volume ratio and a increase of mesophyll thickness, components not measured by fw / dw ratio. The new index proposed here, which takes into...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf succulence; Water relations; Leaf anatomy; Araceae; Ecophysiology.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000100002

Effects of simulated acid rain on leaf anatomy and micromorphology of Genipa americana L. (Rubiaceae)
Provedor de dados: 52
Autores: Sant'Anna-Santos,Bruno Francisco; Silva,Luzimar Campos da; Azevedo,Aristéa Alves; Aguiar,Rosane.
Experiments were conducted in order to characterize the injuries on leaf structure and micromorphology of G. americana and evaluate the degree of susceptibility of this species to simulated acid rain. Plants were exposed to acid rain (pH 3.0) for ten consecutive days. Control plants were submitted only to distilled water (pH 6.0). Leaf tissue was sampled and fixed for light and scanning electron microscopy. Necrotic interveinal spots on the leaf blade occurred. Epidermis and mesophyll cells collapse, hypertrophy of spongy parenchyma cells, accumulation of phenolic compounds and starch grains were observed in leaves exposed to acid rain. The micromorphological analysis showed, in necrotic areas, plasmolized guard cells and cuticle rupture. Epidermal and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genipa americana; Simulated acid rain; Leaf anatomy; Leaf micromorphology.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300017

Leaf Morphological Plasticity of Tree Species from Two Developmental Stages in Araucaria Forest
Provedor de dados: 52
Autores: Vieira,Willyam de Lima; Boeger,Maria Regina Torres; Cosmo,Nelson Luiz; Coan,Alessandra Ike.
This study compared the morphological and anatomical variations of the leaves of four shade-tolerant tree species Allophylus edulis (St.-Hil.) Radlk (Sapindaceae), Casearia sylvestris Sw. (Salicaceae), Cupania vernalis Cambess. (Sapindaceae) and Luehea divaricata Mart. (Malvaceae) from a fragment of Araucaria forest in two developmental stages. Morphological and anatomical traits, such as leaf and tissue thickness, leaf area, leaf dry mass, specific leaf area, leaf density and stomata density were measured from 30 leaves of each developmental stage. The phenotypic plasticity index was also calculated for each quantitative trait. The results showed that the four species presented higher mean values ​​for specific leaf area and spongy/palisade parenchyma...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf anatomy; Leaf morphology; Ombrophyllous Mist Forest; Shade tolerance.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400476

Morphological and physiological adjustments of Brazilwood (Caesalpinia echinata Lam.) to direct solar radiation
Provedor de dados: 61
Autores: Mengarda,Liana Hilda Golin; Milanez,Camilla Rozindo Dias; Silva,Diolina Moura; Aguilar,Marco Antonio Galeas; Cuzzuol,Geraldo Rogério Faustini.
This study aimed to characterize the alarm and resistance phases of stress of Caesalpinia echinata under intense irradiance in order to better define its position on forest succession. The alarm phase was identified by rapid reduction in the maximum quantum yield of PSII primary photochemical reactions (ΦP0 = FV/FM) and Performance Index (PIABS) followed by total leaf abscission in the first week of exposure to direct sunlight. The new leaves grown showed recovery of chlorophyll a parameters, increase in blade thickness, elongation of the palisade and spongy parenchymas, higher water content, and reduction of specific leaf area. These changes were associated with the osmoprotector of sucrose and antioxidative of raffinose effects, which indicate an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest succession; Light stress; Photoinhibition; Leaf anatomy; Soluble carbohydrates.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000300003

Photosynthetic performance and anatomical adaptations in Byrsonima sericea DC. under contrasting light conditions in a remnant of the Atlantic forest
Provedor de dados: 61
Autores: Silva,Anandra S.; Oliveira,Jurandi G.; Cunha,Maura da; Vitória,Angela P.
The photosynthetic dynamics of the tropical pioneer species, Byrsonima sericea DC., were studied during the regeneration process of a native forest by evaluating ecophysiological (gas exchange, chlorophyll a fluorescence and photosynthetic pigment contents) and anatomical parameters of plants in sunny and shady environments. Ecophysiological evaluations were carried out monthly for one year, encompassing both a dry and a rainy season. Byrsonima sericea DC. presents anatomical plasticity that enables it to establish in environments with contrasting light regimes. In sunny conditions, it produced a thicker leaf (about 420 mm) and flat adaxial epidermis, whilst in the shade, leaves had a thinner convex adaxial epidermis (about 395 mm). No differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic forest species; Photosynthetic adaptation; Leaf anatomy; Sun overexposure; Shaded plants.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000400004

Leaf anatomy and carbon isotope composition in Coffea species related to photosynthetic pathway
Provedor de dados: 61
Autores: Carelli,Maria Luiza Carvalho; Queiroz-Voltan,Rachel Benetti; Fahl,Joel Irineu; Trivelin,Paulo César Ocheuze.
Possible presence of vascular bundle sheath cells and its relation to photosynthetic pathway, leaf anatomy and carbon isotope composition (delta13C) were examined in six species of genus Coffea: C. arabica (cvs. Catuaí Vermelho, Mundo Novo, Bourbon Vermelho and Icatu Amarelo), C. canephora (cvs. Apoatã and Guarini), C. liberica, C. dewevrei, C. salvatrix and C. stenophylla. In all genotypes, the vascular bundle was surrounded by a layer of cells with numerous chloroplasts in a centrifugal position. Visually no differences could be seen between the spongy parenchyma cells and the bundle sheath cells, neither in size nor in chloroplast number. The leaf delta13C values ranged between a maximum of - 26.2 ‰ in C. salvatrix and a minimum of -29.7 ‰ in C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bundle sheath cells; Coffea; Leaf anatomy; Leaf carbon isotope composition.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000100003

Anatomical and physiological characteristics of two argentine wheat cultivars
Provedor de dados: 65
Autores: Filgueira,Raúl Roberto; Golik,Inés Silvina; Sarli,Oliverio Guillermo; Jatimliansky,Raúl Jaime.
Two Argentine field grown wheat cultivars (Triticum aestivum L.), Buck Cencerro (BC) with traditional germoplasm, and Buck Pucará (BP) with Mexican germoplasm, have been investigated in order to compare anatomical and physiological characteristics of the flag leaf measured in heading (stage E59), anthesis (stage E69) and kernel water ripe (stage 71). In both cultivars, photosynthetic rate was not different for the same phenological stage, except for E71. Averages in stage E59 were higher than stages E69 and E71 for both cultivars (22.70, 18.40 and 10.40 µmol m-2 s-1 for BP and 23.82, 18.41 and 8.28 µmol m-2 s-1 for BC, respectively). Transpiration rates were higher in BP (5.0, 5.6 and 4.89 mmol m-2 s-1) than BC (3.3, 4.4 and 2.57 mmol m-2 s-1) for stages...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Specific leaf area; Mesophyll area; Carbon dioxide exchange; Transpiration; Leaf anatomy; Conductance.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000400008

Forage potential of Urochloa genotypes by using leaf anatomy
Provedor de dados: 65
Autores: Mauri,Janaína; Pereira,Daniele Laís; Silva,Gabrielle Avelar; Davide,Lisete Chamma; Techio,Vânia Helena; Souza Sobrinho,Fausto; Pereira,Fabricio José.
ABSTRACT:  The digestibility potential of leaves from forages depends on the amount of nutrition in their tissues, with low lignin deposition in the cell wall, mainly parenchyma and phloem. This research evaluated the leaf structure of different Urochloa genotypes and discussed its potential for evaluating digestibility. The cultivars U. brizantha, U. decumbens, U. ruziziensis and three clones of U. ruziziensis (1, 95 and 97), which are under development in breeding programs, were evaluated. Plants were grown under the recommended culture conditions for the Urochloa species. Plants were cut 60 days after sowing, and leaves were collected at 15 days of regrowth. Leaves were fixed in FAA 70 and further stored in 70% ethanol until being submitted to the usual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestibility; Forage production; Leaf anatomy; Sclerenchyma; Lignin.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400401