نهمین کنفرانس ملی و اولین کنفرانس بین المللی فیزیولوژی گیاهی

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کد مقاله 1317

عنوان Fast and Reliable Non-Destructive Indicators for Identifying Drought-Tolerant Pistachio Interspecific Hybrids

نویسندگان Mozhdeh Osku - Mahmoud Reza Roozban - Saadat Sarikhani - Rasoul Sadeghi-Majd - Ali Najaf Dolabi

چکیده Drought stress is a major limitation of pistachio (Pistacia vera L.) production in arid and semi-arid regions, necessitating the identification of drought-tolerant genotypes through fast and reliable non-destructive indicators. In this study, six interspecific Pistacia hybrids and the commercial rootstock ‘UCB1’ were subjected to prolonged drought stress followed by a recovery period. Chlorophyll fluorescence (Fv/Fm, Fv/F0), leaf color in the L*a*b* space, and plant vitality were measured at the end of stress and recovery phases. Drought significantly impaired PSII function, reduced photochemical efficiency, altered leaf color, and decreased vitality in sensitive hybrids (‘C8-3’, ‘C4-2’, ‘C16-1’), whereas tolerant ones (‘Arota’, ‘C2’, ‘C9-4’) maintained higher Fv/Fm and Fv/F0, stable leaf pigment composition, and faster recovery. Leaf color metrics correlated with chlorophyll fluorescence and vitality, confirming their reliability as non-destructive proxies of stress response. These findings demonstrate that combined assessment of chlorophyll fluorescence, leaf color, and vitality provides a practical and efficient approach for screening drought-tolerant pistachio rootstocks.

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