Gas-exchange characteristics, leaf water potential and chlorophyll a fluorescence in oil palm (Elaeis guineensis Jacq.) seedlings under water stress and recovery

被引：27
|
作者：
Suresh, K. [1 ]
Nagamani, C. [1 ]
Ramachandrudu, K. [1 ]
Mathur, R. K. [1 ]
机构：
[1] Directorate Oil Palm Res, Pedavegi 534450, Andhra Pradesh, India
来源：
PHOTOSYNTHETICA | 2010年 / 48卷 / 03期
关键词：
Elaeis guineensis; photosynthesis; photosystem II; stomatal conductance; transpiration; REDOX STATE; PHOTOSYNTHETIC RATE; ASSIMILATION; PARAMETERS; RESPONSES; STOMATA; LEAVES; AGE;
D O I：
10.1007/s11099-010-0056-x
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
The gas-exchange characteristics, leaf water potential and chlorophyll (Chl) a fluorescence of oil palm (Elaeis guineensis Jacq.) seedlings subjected to water stress and recovery were investigated in a greenhouse experiment. At 24 days after imposition of stress, leaf water potential in water-stressed seedlings was doubled compared to that of control and there was a drastic decline in gas-exchange parameters viz. photosynthesis, transpiration, and stomatal conductance. Water stress did not irreversibly affect gas-exchange parameters and quantum efficiency of photosystem II, as seedlings exhibited total recovery of photosynthetic apparatus by 12(th) day of rehydration. These findings indicate that oil palm exhibits physiological plasticity to water stress during the seedling stage.
引用
收藏
页码：430 / 436
页数：7
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