Role of salicylic acid in amelioration of drought stress in Hibiscus sabdariffa
محل انتشار: اولین کنفرانس ملی یافته های نوین زیست شناسی
سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 267
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شناسه ملی سند علمی:
BIOC01_332
تاریخ نمایه سازی: 11 خرداد 1397
چکیده مقاله:
Stress is an external factor, which cause undesirable effects on plant. Plants are continuously exposed to different environmental stress under natural and agricultural conditions. Drought stress, also known as water stress, is a most important of environmental stress. Under unstable conditions, endogenous defense systems may not be enough to cope with the stress. Thus, signal molecules synthesis can be useful in understanding of plant response to the environmental stress. Salicylic acid is one of the signal molecules and endogenous regulators, which have an important role in regulation of some physiological processes including photosynthesis. In the present work, the effects of drought stress with salicylic acid on Hibiscus sabdariffa were investigated. These plants were exposed to three drought levels (0, 0.5, and 1 MPa) with different salicylic acid concentrations (0, 200, and 500 μM) in a factorial design. Results show that drought stress cause decrease in water relative content, pigments, and carbohydrate contents. However, salicylic acid can ameliorate water status and prevent decrease of pigments and carbohydrate contents. Therefore, it can be concluded that salicylic acid can enhance .drought stress tolerance through accumulate soluble sugars and enhanced photosynthetic performance
کلیدواژه ها:
نویسندگان
Marziyeh Mirshekari
Department of biology, Faculty of Science, University of Sistan and baluchestan, Zahedan
Jafar Valizadeh
Department of biology, Faculty of Science, University of Sistan and baluchestan, Zahedan
Alireza Einali
Department of biology, Faculty of Science, University of Sistan and baluchestan, Zahedan