کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5766658 1628039 2017 37 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
UV radiation priming: A means of amplifying the inherent potential for abiotic stress tolerance in crop plants
ترجمه فارسی عنوان
پرایمر تابش اشعه ماوراء بنفش: وسیله ای برای تقویت پتانسیل ذاتی برای تحمل تنش زایی در گیاهان زراعی است
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
The emerging concept, that agricultural crops become more hardy on exposure to low levels of UV radiation, has directed the thoughts towards utilizing the same for priming the seeds/seedlings of crop plants to counter abiotic stresses. The exposure of seeds to UV is an ecologically safe method to improve plant productivity, yield quality and also to enhance the tolerance of plants to various biotic and abiotic stresses. According to various researchers, the seeds and seedlings of different plants (rice, wheat, maize, cucumber, cowpea) when irradiated with low levels of UV radiation (0.004-4 Wm−2 from UV lamp with cellulose diacetate filters) lead to various morphological and physiological changes in the further growth stages. Low levels of UV irradiation also stimulated the seed germination, growth, biomass, seed coat thickness, fresh and dry weight of roots and shoots. Moreover, the pigment content like carotenoids, anthocyanins, chlorophyll and also the photosynthesis were increased on exposure to low levels of UV irradiation. Priming of seeds or seedlings with low levels of UV radiation not only stimulated production of various metabolites, but also enhanced the activities of antioxidant enzymes and accumulation of non-enzymatic antioxidants and thus enhances tolerance of plants towards various abiotic stresses. UVB photoreceptor (UVR8) has been isolated from Arabidopsis, which regulates the expression of gene in UVB acclimation and stress tolerance. Thus low levels of UV may be imparting a priming effect on various crop species, so as to bring about positive changes with regard to biotic and abiotic stress tolerance, enhanced crop yield and quality.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental and Experimental Botany - Volume 138, June 2017, Pages 57-66
نویسندگان
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