Effects of drought stress induced by polyethylene glycol on pigment content and photosynthetic gas exchange of Pistacia khinjuk and P-mutica

Authors
Ranjbarfordoei, A Samson, R Van Damme, P Lemeur, R
Citation
A. Ranjbarfordoei et al., Effects of drought stress induced by polyethylene glycol on pigment content and photosynthetic gas exchange of Pistacia khinjuk and P-mutica, PHOTOSYNTHE, 38(3), 2000, pp. 443-447
Citations number
33
Categorie Soggetti
Plant Sciences
Journal title
PHOTOSYNTHETICA
ISSN journal
03003604 → ACNP
Volume
38
Issue
3
Year of publication
2000
Pages
443 - 447
Database
ISI
SICI code
0300-3604(2000)38:3<443:EODSIB>2.0.ZU;2-L
Abstract
The effects of drought stress induced by polyethylene glycol, PEG (molecula r mass 6000) on some ecophysiological characteristics of two wild pistachio species, Mastic and Khinjuk (P. mutica and P. khinjuk) selected as root st ocks for production of edible pistachio trees (P. vera) in Iran and Turkey, were studied. Net photosynthetic rate (PN), stomatal conductance (g(s)), c hlorophyll (Chl) fluorescence parameters, leaf water potential (Psi (1)), l eaf osmotic potential (Psi (pi)), leaf osmotic adjustment (Delta Psi (pi)), and Chl a and b were measured. All parameters were influenced by increase in concentration of PEG in the nutrient solutions. P-N, g(s), and Chl a wer e significantly higher in P. mutica than in P. khiniuk but, compared to the control treatment, P. khinjuk showed a higher resistance to drought stress than P. murica.