Photosynthetica 2002, 40(2):165-169 | DOI: 10.1023/A:1021377103775

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

A. Ranjbarfordoei1, R. Samson2, R. Lemeur2, P. Van Damme1
1 Department of Plant Production, Laboratory of Tropical and Subtropical Agronomy and Ethnobotany, Ghent University, Gent, Belgium
2 Department of Applied Ecology and Environmental Biology, Laboratory of Plant Ecology, Belgium

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 (Ψs) decreased. The osmotic adjustment (ΔΨπ) of the species increased by decreasing Ψs. Thus P. khinjuk had a higher osmotic drought stress tolerance than P. mutica.

Additional key words: chlorophyll content; leaf osmotic potential; net photosynthetic rate; osmotic adjustment; stomatal conductance

Published: June 1, 2002  Show citation

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Ranjbarfordoei, A., Samson, R., Lemeur, R., & Van Damme, P. (2002). 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. Photosynthetica, 40(2), 165-169. doi: 10.1023/A:1021377103775
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