سامانه همایش های دانشگاه جیرفت

صفحه اصلی / سومین همایش بین المللی و چهارمین همایش ملی کشاورزی، محیط زیست و امنیت غذایی

Growth and Antioxidant Mechanisms of Seven Pistachio Interspecific Hybrid Rootstocks in Response to Water Stress

نویسندگان :

Mozhdeh Osku¹ Mahmoud Reza Roozban² Saadat Sarikhani³ Mohammad Mehdi Arab⁴ Ali Najafdoulabi⁵ Kourosh Vahdati⁶

1- دانشگاه تهران 2- دانشگاه تهران 3- دانشگاه تهران 4- دانشگاه تهران 5- university of Tehran 6- university of Tehran

کلمات کلیدی :

CAT activity،Clonal hybrid،UCB1،Water withholding

چکیده :

Nine-month-old clonal saplings of seven interspecific hybrids of Pistacia atlantica × P. integerrima (C1, C2, C16-1, C8-3, C4-2, C9-4 and UCB1) were assessed for their responses to water withholding. Growth parameters, total phenolic content, hydrogen peroxide (H₂O₂) levels, and catalase activity in both leaves and roots of the saplings were the traits assessed 30 days after water withholding. The results showed that water stress significantly reduced shoot dry weight (SDW) in all hybrid saplings, with the least reduction observed in the resistant hybrid, Arota (C1). H₂O₂ content increased in all stressed plants compared to controls, with sensitive hybrids such as C8-3 and C4-2 showing the highest increases. Catalase activity was notably higher in resistant hybrids, such as C9-4 and C1, under stress conditions. Total phenolic content also increased in all hybrids under water stress, with resistant clones exhibiting a greater increase. These findings suggest that resistant hybrids employ effective defense mechanisms, including enhanced antioxidant capacity, to mitigate oxidative damage and improve drought tolerance. This research highlights potential strategies for utilizing resistant rootstocks for sustainable pistachio production in water-scarce regions.