Majid Zohouri

Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University of Tehran, Tehran, Iran

Hamid Abdollahi

Temperate Fruits Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

Isa Arji

Crop and Horticulture Research Department, Kermanshah Agricultural and Natural Resources Research and Education center, AREEO, Kermanshah, Iran

Vahid Abdossi

Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University of Tehran, Tehran, Iran


A greenhouse experiment was conducted to estimate the impacts of various deficit irrigation regimes (DIR) as 100 (control), 75 (medium DIR, MDIR) and 50% (severe DIR, SDIR) of field capacity (FC) on the growth and photosynthetic traits of five rootstocks (two vigorous seedling including Pyrus betulifolia and Dargazi seedling (P. communis L.) as well as three clonal semi-dwarfing rootstocks including OH×F69, OH×F87 and Pyrodwarf in 2016. Although in all studied rootstocks the growth and photosynthetic parameters negatively affected under MDIR and SDIR conditions, but P. betulifolia and Pyrodwarf rootstocks had the better growth rate, chlorophylls, total carbohydrates, relative water content, sub-stomatal CO2 (Ci), photosynthesis rate (PN) and instantaneous water use efficiency compared to others. Therefore, the use of P. betulifolia and Pyrodwarf (as drought tolerance rootstocks) could be more appropriate under various DIR conditions.


carbohydrates, chlorophylls drought tolerance, P. betulifolia, Pyrodwarf

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Majid Zohouri 
Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University of Tehran, Tehran, Iran
Hamid Abdollahi 
Temperate Fruits Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
Isa Arji 
Crop and Horticulture Research Department, Kermanshah Agricultural and Natural Resources Research and Education center, AREEO, Kermanshah, Iran
Vahid Abdossi 
Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University of Tehran, Tehran, Iran



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