مشخصات پژوهش

صفحه نخست /Various Forms of Foliar ...
عنوان Various Forms of Foliar Applied Zinc Improve Drought Acclimation in Pomegranate: Response of Photosynthesis, Osmoregulation and Antioxidant Defense
نوع پژوهش مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها Antioxidant capacity · Drought stress · Nanotechnology · Osmoregulation · Pomegranate · Zinc
چکیده Pomegranate (Punica granatum L.) is considered as a source of antioxidants with anticancer and antiviral activities. Optimal nutrition, especially the use of various forms of minerals can alleviate drought stress as a major challenge for pomegranate production. In this study, the effect of foliar application of various forms of zinc [zinc sulfate (5 and 10 mg L−1 of ZnSO4) and zinc oxide nanoparticles (5 and 10 mg L−1 of ZnO-NPs) and distilled water as a control] on some physiological and biochemical attributes of pomegranate plants under various levels of drought stress (100, 60 and 30% field capacity, FC) was assessed. SPAD, relative water content (RWC), content of chlorophyll a and b (Chl a and b) decreased by 16, 7, 46, and 14% under severe stress, respectively. In contrast, ZnSO4 (10 mg L−1) significantly increased the amount of SPAD, RWC and total Chl compared to the control. In addition, ZnSO4 (10 mg L−1) reduced the content of electrolyte leakage (23%) and malondialdehyde (13%) while ZnO-NPs (5 mg L−1) reduced the amount of hydrogen peroxide (9%) under severe drought. Foliar application of ZnSO4 (10 mg L−1) under severe drought stress also led to an increase in antioxidant enzymes including superoxide dismutase (1%), proline (27%), and carbohydrates (12%). Polyphenol oxidase (7%) also increased with the use of ZnO-NPs (5 mg L−1). It seems that the foliar application of Zn, especially ZnSO4 (10 mg L−1) can be a useful solution to improve the tolerance of pomegranate plants to drought stress, especially in areas with zinc deficiency.
پژوهشگران سعادت ساریخانی (نفر ششم به بعد)، مجتبی امینی (نفر پنجم)، مارک واکولیک (نفر چهارم)، مینا مرجانی (نفر سوم)، طاهر حرفی (نفر دوم)، سید مرتضی زاهدی (نفر اول)