Características fotossintéticas de genótipos de capim-elefante anão (Pennisetum purpureum Schum.), em estresse hídrico
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Data
2010-04-19
Autores
Do Carmo Araújo, Saulo Alberto
Vasquez, Hernan Maldonado
Campostrini, Eliemar
Netto, Alena Torres
Deminicis, Bruno Borges
Da Silva Lima, Érico [UNESP]
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Resumo
The experiment was carried out aiming to evaluate the gas exchange of dwarf elephant grass genotypes under different hydric conditions, in a randomized design with three replications. Genotypes of dwarf elephant grass (Mott, CNPGL 94-34-3 and CNPGL 92-198-7) were analyzed under two hydric conditions: irrigated (I) and non-irrigated (NI). Differences between treatments I and NI were observed for all genotypes for photosynthesis, stomatal conductance, transpiration and water vapor pressure deficit. Genotype CNPGL 94-34-3 presented highest tolerance to hydric stress, followed by Mott and CNPGL 92-198-7 genotypes. All genotypes presented high photosynthetic rate, under ideal conditions of soil humidity, thus characterizing the analyzed dwarf elephant grass genotypes as plants with high photosynthetic efficiency.
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Palavras-chave
Photoinhibition, Photosynthesis, Stomatal conductance, Transpiration, Vapor pressure deficit, Pennisetum glaucum, Pennisetum purpureum
Como citar
Acta Scientiarum - Animal Sciences, v. 32, n. 1, p. 1-7, 2010.