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      Alterações anatômicas e fisiológicas em Setaria anceps Stapf ex Massey e Paspalum paniculatum L. sob condições de déficit hídrico Translated title: Anatomical and physiological alterations in Setaria anceps Stapf ex Massey and Paspalum paniculatum L. under water deficit conditions

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          Abstract

          Ambas as espécies Setaria anceps (setária) e Paspalum paniculatum (paspalo) são tolerantes a condições de deficiência hídrica e inundação do solo. O objetivo desse trabalho foi avaliar alterações anatômicas, ecofisiológicas e metabólicas em folhas e raízes de setária e paspalo quando submetidas a condições de deficiência hídrica do solo. Aos onze dias de restrição hídrica, pouca variação foi observada na densidade e tamanho dos estômatos em setária, houve diminuição da espessura do limbo foliar, feixe vascular e córtex radicular e nas taxas de transpiração. O conteúdo de proteínas (P), açúcares solúveis totais (AST), açúcares redutores (AR) e amido decresceu em folhas e AST e amido, em raízes. Em paspalo, ocorreu variações no tamanho e densidade dos estômatos, redução no diâmetro do metaxilema e córtex radicular, aumento no tamanho de células buliformes e na concentração foliar de aminoácidos, AST, AR e amido.

          Translated abstract

          Both Setaria anceps (setária) and Paspalum paniculatum (paspalo) species are tolerant to soil drought water deficiency and flooding. The aim of this work was evaluate anatomical, ecophysiological and metabolic alterations on setária and paspalo leaves and roots when submitted to soil water deficit conditions. Eleven days after the beginning of water restriction, few variations were observed in density and size of stomata in setária, but there was decreasing in thickness of mesophyll, vascular bundle, root cortex and transpiration rate. Protein (P), total soluble sugars (AST), reducing sugars (AR) and starch content decreased in leaves and AST and starch content decrease in roots. In paspalo, varations on density and size of the stomatal cells, reduction of the metaxylem diameter and root cortex, increasing of bulliform cells size, leaf concentration of amino acid, AST, AR, and starch were observed.

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          Most cited references 57

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          Sistema brasileiro de classificação do solo

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            Effects of Water Deficits on Carbon Assimilation

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              The C4 Syndrome: A Structural Analysis

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                hoehnea
                Hoehnea
                Hoehnea
                Instituto de Botânica (São Paulo )
                2236-8906
                2007
                : 34
                : 2
                : 145-153
                Affiliations
                [1 ] Universidade Federal de Lavras Brazil
                Article
                S2236-89062007000200003
                10.1590/S2236-89062007000200003
                Product
                Product Information: website
                Categories
                PLANT SCIENCES

                Plant science & Botany

                drought, ecophysiology, paspalo, setaria, ecofisiologia, seca, setária

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