Gas-exchange characteristics,leaf water potential and chlorophyll <Emphasis Type="Italic">a</Emphasis> fluorescence in oil palm (<Emphasis Type="Italic">Elaeis guineensis</Emphasis> Jacq.) seedlings under water stress and recovery |
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Authors: | K Suresh C Nagamani K Ramachandrudu R K Mathur |
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Institution: | 1.Directorate of Oil Palm Research,Pedavegi,India |
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Abstract: | 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 12th day of rehydration. These findings indicate that oil palm exhibits physiological plasticity to water stress during the seedling
stage. |
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