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Changes in photosynthetic activity in five common hybrids of oil palm (Elaeis guineensis Jacq.) seedlings under water deficit

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Title Changes in photosynthetic activity in five common hybrids of oil palm (Elaeis guineensis Jacq.) seedlings under water deficit
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Creator K. SURESH , C. NAGAMANI, D.L. KANTHA, and M.K. KUMAR
 
Subject drought; Elaeis guineensis Jacq.; gas exchange; stomatal conductance; water deficit
 
Description Not Available
The leaf water potential, gas-exchange parameters and chlorophyll fluorescence were evaluated in five common oil palm (Elaeis guineensis Jacq.) tenera hybrids 913X1988, 1425X2277, 748X1988, 7418X1988, and 690X1988 under water deficit with an aim to identify hybrids which can cope up better under such conditions and understand possible differences among hybrids in relation to the physiological mechanisms triggered by water deficit. Our findings indicate oil palm hybrids 913X1988, 1425X2277, and 7418X1988 maintained higher leaf water potentials than the other hybrids. Hybrids 7418X1988 and 1425X2277 recorded lower stomatal conductance after water deficit, which resulted in higher intrinsic water-use efficiency. The excess light energy produced due to decreased photosynthesis in 7418X1988 and 690X1988 hybrids under water deficit was dissipated as heat by higher nonphotochemical quenching. The maximum efficiency of photosystem II was not affected, even after withholding water for 24 days, suggesting an increased efficiency of photoprotection mechanisms in all these oil palm hybrids.
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Date 2018-11-19T04:40:33Z
2018-11-19T04:40:33Z
2012-12-19
 
Type Research Paper
 
Identifier PHOTOSYNTHETICA 50 (4): 549-556, 2012
0300-3604
http://krishi.icar.gov.in/jspui/handle/123456789/11883
 
Language English
 
Relation Not Available;
 
Publisher Springer