|
|
|
| Registros recuperados: 50 | |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
| Registros recuperados: 50 | |
|
|
|
