Data/hora: 13/06/2024 21:53:38

Provedor de dados: | 61
País: | Brazil
Título: | Physiological parameters in sugarcane cultivars submitted to water deficit
Autores: | Graça,José Perez da; Rodrigues,Fabiana Aparecida; Farias,José Renato Bouças; Oliveira,Maria Cristina Neves de; Hoffmann-Campo,Clara Beatriz; Zingaretti,Sonia Marli.
Data: | 2010-01-01
Ano: | 2010
Palavras-chave: | Photosynthetic efficiency; Relative water content; Saccharum; Water stress; Drought.
Resumo: | To investigate the processes involved in the susceptibility of sugarcane plants to water deficit, several physiological parameters were evaluated in drought tolerant (SP83-2847 and CTC15) and sensitive (SP86-155) cultivars. The water deficit affected the photosynthetic apparatus of all the plants in different ways, within and among cultivars. The photosynthetic rate and stomatal conductance decreased significantly in all cultivars submitted to water deficit. In control plants of the tolerant cultivars (SP83-2847 and CTC15) the photosynthetic rate was higher than in the sensitive cultivar (SP86-155). Cultivar CTC15 showed the highest relative water content during the dry period. The quantum efficiency photosystem II of cultivar SP83-2847 was more stable in the last days of the experimental treatment, suggesting that the decline in relative water content stimulated an adjustment of photosynthetic capacity to tolerate the changes in water availability. As a whole, the tolerant SP83-2847 and CTC15 cultivars exhibited a better photosynthetic performance than the sensitive SP86-155 cultivar. The data suggest that these physiological parameters can be used in the evaluation and distinction of drought tolerant and sensitive sugarcane genotypes.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300006
Editor: | Brazilian Journal of Plant Physiology
Relação: | 10.1590/S1677-04202010000300006
Formato: | text/html
Fonte: | Brazilian Journal of Plant Physiology  v.22 n.3 2010
Fonte: | info:eu-repo/semantics/openAccess