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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Abbreviations
- C a :
-
ambient CO2 concentration
- Chl:
-
chlorophyll
- E :
-
transpiration rate
- ETR:
-
apparent rate of photochemical transport of electrons through PSII
- Fm :
-
maximum fluorescence
- Fm’:
-
maximum fluorescence yield acclimated to irradiation
- Fo :
-
minimal fluorescence
- F0’:
-
initial fluorescence in leaves acclimated to irradiation
- Fp :
-
Chl fluorescence intensity at peak of continuous fluorescence inductive curve
- Fs :
-
steady state fluorescence in leaves acclimated to irradiation
- Fv :
-
variable part of Chl fluorescence
- Fv/Fm :
-
photochemical efficiency of photosytem II
- g s :
-
stomatal conductance
- NPQ:
-
coefficient of non-photochemical quenching of excitation energy
- Ndh :
-
nicotinamide adenine dinucleotide (phosphate) dehydrogenase
- PAR:
-
incident photosynthetically active radiation in leaf
- P N :
-
net photosynthetic rate
- PSI:
-
photosystem I
- PSII:
-
photosystem II
- QA :
-
quinone A
- qL :
-
coefficient of photochemical quenching
- WUE:
-
water-use efficiency
- Ψw :
-
leaf water potential
- ΦPSII :
-
effective quantum yield of PSII
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Suresh, K., Nagamani, C., Ramachandrudu, K. et al. Gas-exchange characteristics, leaf water potential and chlorophyll a fluorescence in oil palm (Elaeis guineensis Jacq.) seedlings under water stress and recovery. Photosynthetica 48, 430–436 (2010). https://doi.org/10.1007/s11099-010-0056-x
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DOI: https://doi.org/10.1007/s11099-010-0056-x