کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5515541 1541910 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research articleNitric oxide protects carbon assimilation process of watermelon from boron-induced oxidative injury
ترجمه فارسی عنوان
مقاله پژوهشی اکسید نیتریک از فرایند جذب کربن هندوانه از آسیب اکسیداتیو ناشی از بور محافظت می کند
کلمات کلیدی
سمیت بور، پراکسیداسیون لیپید، استرس اکسیداتیو، مهار فتوسنتز، نیترات پراکسید سدیم،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
چکیده انگلیسی


- Watermelon plants are highly responsive to high or low B supply in the growth media.
- B toxicity or deficiency impairs photo-assimilation process in watermelon leaves.
- Sodium nitroprusside (NO donor) protects watermelon seedlings from B-induced injury.

Nitric oxide (NO) mediates plant response to a variety of abiotic stresses; however, limited information is available on its effect on boron (B)-stressed watermelon plants. The present study investigates the mechanism through which NO protects watermelon seedlings from B deficiency and toxicity stresses. Five days old watermelon seedlings were exposed to B (0, 0.5 and 10 mg L−1) alone or with 75 μmole of NO donor sodium nitroprusside (SNP) for 30 days. Both low and high B concentrations in the media altered nutrient accumulation and impaired various physiological processes of watermelon seedlings, leading to a significant reduction in biomass production. The plants exposed to B deficient or toxic concentrations had 66 and 69% lower shoot dry weight, respectively compared with optimum B levels. B toxicity-induced growth inhibition of watermelon seedlings was associated with high B translocation to shoot tissues, which caused lipid membrane peroxidation (12% increase) and chlorophyll destruction (25% reduction). In contrast, B deficiency accelerated generation of reactive oxygen species (ROS), specifically OH−1 and induced cellular oxidative injury. Exogenously applied SNP promoted leaf chlorophyll, photosynthesis and consequently biomass production in B-stressed watermelon seedlings by reducing B accumulation, lipid membrane peroxidation and ROS generation. It also activated antioxidant enzymes such as SOD, POD and APX, and protected the seedlings from ROS-induced cellular burst.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 111, February 2017, Pages 166-173
نویسندگان
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