Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/28748
Título: Anatomia foliar de mandioca em função do potencial para tolerância a diferentes condições ambientais
Título(s) alternativo(s): Leaf anatomy of the cassava as related to potential for tolerance to different environmental conditions
Palavras-chave: Mandioca
Anatomia foliar
Plantas-efeito da seca
Euforbiácea
Cassava
Leaf anatomy
Drought effect-plants
Euphorbiaceae
Data do documento: 2012
Editor: Universidade Federal do Ceará
Citação: RIBEIRO, M. de N. O. et al. Anatomia foliar de mandioca em função do potencial para tolerância a diferentes condições ambientais. Revista Ciência Agronômica, Fortaleza, v. 43, n. 2, p. 354-361, abr./jun. 2012.
Resumo: Cassava is an important plant, cultivated in tropical regions, possessing great genetic variability which has still hardly been studied. The objective of this work was to examine the leaf anatomy of thirteen genotypes to assess their potential for adaptation in different environmental conditions. Fully unfolded leaves were collected from thirteen cassava genotypes being analyzed for quantitative changes in internal structure using optical microscopy. The experimental design was completely randomized with 12 replications and 13 treatments, the data were submitted to ANOVA and the Scott-Knott test. The different genotypes displayed great anatomical plasticity for most characters, with the most important changes occurring in the density and size of the stomata, tissue thickness of the abaxial epidermis, of the palisade and spongy parenchyma, in the phloem and xylem. The UFLA E, IAC 14 and UFLA J genotypes displayed as possibilities for xeric conditions, due to a high stomatal density, smaller stomata, a thicker adaxial epidermis, thicker palisade and spongy parenchyma, lower vulnerability of the xylem and greater thickness of the phloem, which would allow reduction in transpiration and better use of a large amount of incident radiation. The other genotypes exhibit more mesophytic features. Thus, cassava genotypes have anatomical plasticity, and can display the potential for selection of desirable characteristics for different environmental conditions.
URI: http://www.scielo.br/scielo.php?pid=S1806-66902012000200019&script=sci_abstract&tlng=pt
http://repositorio.ufla.br/jspui/handle/1/28748
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