Photosynthetica 2000, 38(3):443-447 | DOI: 10.1023/A:1010946209484

Effects of Drought Stress Induced by Polyethylene Glycol on Pigment Content and Photosynthetic Gas Exchange of Pistacia Khinjuk and P. Mutica

A. Ranjbarfordoei1, R. Samson2, P. Van Damme3, R. Lemeur2
1 Department of Plant Production, Laboratory of Tropical and Subtropical Agronomy and Ethnobotany, Belgium
2 Department of Applied Ecology and Environmental Biology, Laboratory of Plant Ecology, Ghent University, Ghent, Belgium
3 Department of Plant Production, Laboratory of Tropical and Subtropical Agronomy and Ethnobotany, Belgium

The effects of drought stress induced by polyethylene glycol, PEG (molecular mass 6000) on some ecophysiological characteristics of two wild pistachio species, Mastic and Khinjuk (P. mutica and P. khinjuk) selected as root stocks for production of edible pistachio trees (P. vera) in Iran and Turkey, were studied. Net photosynthetic rate (PN), stomatal conductance (gs), chlorophyll (Chl) fluorescence parameters, leaf water potential (Ψ1), leaf osmotic potential (Ψπ), leaf osmotic adjustment (ΔΨπ), and Chl a and b were measured. All parameters were influenced by increase in concentra-tion of PEG in the nutrient solutions. PN, gs, and Chl a were significantly higher in P. mutica than in P. khinjuk but, compared to the control treatment, P. khinjuk showed a higher resistance to drought stress than P. mutica.

Additional key words: chlorophyll content; net photosynthetic rate; osmotic adjustment; stomatal conductance; water use efficiency

Prepublished online: April 1, 2000; Published: October 1, 2000  Show citation

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Ranjbarfordoei, A., Samson, R., Van Damme, P., & Lemeur, R. (2000). Effects of Drought Stress Induced by Polyethylene Glycol on Pigment Content and Photosynthetic Gas Exchange of Pistacia Khinjuk and P. Mutica. Photosynthetica, 38(3), 443-447. doi: 10.1023/A:1010946209484
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