نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زراعت و اصلاح نباتات، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران
2 نویسنده مسئول، گروه زراعت و اصلاح نباتات، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
3 گروه زراعت و اصلاح نباتات، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Drought stress is one of the most important abiotic stresses that threatens the production of crops. The objective of the present study was to evaluate certain physiological and biochemical traits in common bean under drought stress conditions. For this purpose, a field experiment was conducted at the Research Farm of the Department of Agronomy, College of Agriculture and Natural Resources, University of Tehran, Karaj, during the 2022 growing season. The experiment was carried out as a split-factorial arrangement in a randomized complete block design with three replications. Treatments included three irrigation levels (normal irrigation and irrigation at 30% and 60% of field capacity), two levels of salicylic acid (0 and 0.5 mM), two bacterial treatments (without and with inoculation of nitrogen-fixing Rhizobium leguminosarum biovar phaseoli strain R160), and two bean genotypes (Sadri and Yas). The results showed that increasing drought stress intensity led to a reduction in protein content and an increase in proline, malondialdehyde (MDA), electrolyte leakage, catalase, peroxidase, ascorbate peroxidase, and glutathione peroxidase activities. Moreover, the application of salicylic acid and Rhizobium inoculation, compared with the control (no hormone or bacteria), enhanced protein content and enzymatic activities while decreasing MDA levels and electrolyte leakage. Significant differences were also observed between the sensitive and tolerant genotypes in terms of electrolyte leakage, protein content, and MDA. These findings support the idea that the combined application of salicylic acid and Rhizobium inoculation can serve as an effective strategy to improve drought tolerance in both sensitive and tolerant common bean genotypes.
کلیدواژهها [English]
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