Physiological parameters in sugarcane cultivars submitted to water deficit
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.
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Brazilian Journal of Plant Physiology
2010
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oai:scielo:S1677-042020100003000062011-01-28Physiological parameters in sugarcane cultivars submitted to water deficitGraça,José Perez daRodrigues,Fabiana AparecidaFarias,José Renato BouçasOliveira,Maria Cristina Neves deHoffmann-Campo,Clara BeatrizZingaretti,Sonia Marli Photosynthetic efficiency relative water content Saccharum water stress drought 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.info:eu-repo/semantics/openAccessBrazilian Journal of Plant PhysiologyBrazilian Journal of Plant Physiology v.22 n.3 20102010-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300006en10.1590/S1677-04202010000300006 |
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Graça,José Perez da Rodrigues,Fabiana Aparecida Farias,José Renato Bouças Oliveira,Maria Cristina Neves de Hoffmann-Campo,Clara Beatriz Zingaretti,Sonia Marli |
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Graça,José Perez da Rodrigues,Fabiana Aparecida Farias,José Renato Bouças Oliveira,Maria Cristina Neves de Hoffmann-Campo,Clara Beatriz Zingaretti,Sonia Marli Physiological parameters in sugarcane cultivars submitted to water deficit |
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Graça,José Perez da Rodrigues,Fabiana Aparecida Farias,José Renato Bouças Oliveira,Maria Cristina Neves de Hoffmann-Campo,Clara Beatriz Zingaretti,Sonia Marli |
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Graça,José Perez da |
title |
Physiological parameters in sugarcane cultivars submitted to water deficit |
title_short |
Physiological parameters in sugarcane cultivars submitted to water deficit |
title_full |
Physiological parameters in sugarcane cultivars submitted to water deficit |
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Physiological parameters in sugarcane cultivars submitted to water deficit |
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Physiological parameters in sugarcane cultivars submitted to water deficit |
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physiological parameters in sugarcane cultivars submitted to water deficit |
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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. |
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Brazilian Journal of Plant Physiology |
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2010 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000300006 |
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