Effects of Osmotic Drought Stress Induced by a Combination of NaCl and Polyethylene Glycol on Leaf Water Status,Photosynthetic Gas Exchange,and Water Use Efficiency of Pistacia khinjuk and P. mutica |
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| Authors: | Ranjbarfordoei A Samson R Lemeur R Van Damme P |
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| Institution: | (1) Department of Plant Production, Laboratory of Tropical and Subtropical Agronomy and Ethnobotany, Ghent University, Coupure Links 653, B-9000 Gent, Belgium;(2) Department of Applied Ecology and Environmental Biology, Laboratory of Plant Ecology, Belgium |
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| Abstract: | Leaf water potential, leaf osmotic potential, chlorophyll a and b contents, stomatal conductance, net photosynthetic rate, and water use efficiency were determined in two pistachio species (Pistacia khinjuk L. and P. mutica L.) grown under osmotic drought stress induced by a combination of NaCl and polyethylene glycol 6000. A decrease in values for all mentioned variables was observed as the osmotic potential of the nutrient solution ( s) decreased. The osmotic adjustment (  ) of the species increased by decreasing s. Thus P. khinjuk had a higher osmotic drought stress tolerance than P. mutica. |
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| Keywords: | chlorophyll content leaf osmotic potential net photosynthetic rate osmotic adjustment stomatal conductance |
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