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| Registros recuperados: 54 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| RIBEIRO, M. R.; TRINDADE, R. dos S.; SOUZA, I. R. P. de; CARNEIRO, A. A.; AZEVEDO, T. C. de; GUIMARAES, L. J. M.; CHAVES, S. F. da S.; DIAS, L. A. dos S.. |
| To meet the demands of the production chain, breeding programs need to reduce the time for selection and development of higher yielding maize genotypes. This involves application of new strategies, such as the use of the doubled haploid lines. We evaluated the use of stomatal area and density in distinguishing doubled haploids (DH) from false positive (FP) plants derived from nine tropical source populations. We selected four DH plants and two FP plants for identification of DH through leaf anatomy in the populations, in each group. Data on stomatal area and density were considered in a completely randomized model in a factorial scheme (populations and genotypes) and analyzed by restricted maximum likelihood. There were statistically significant effects of... |
| Tipo: Artigo de periódico |
Palavras-chave: Leaf anatomy; False positive; Anatomia foliar; Duplo haploide; Falso positivo; Milho; Anatomia Vegetal; Zea Mays; Doubled haploids. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1145025 |
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| 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 |
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| 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... |
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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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 54 | |
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