کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8354926 | 1541929 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Application of γ-aminobutyric acid demonstrates a protective role of polyamine and GABA metabolism in muskmelon seedlings under Ca(NO3)2 stress
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کلمات کلیدی
SAMDCADCODCPAOGABA-TSPDSPMTCARWCGADMuskmelonGABA transaminase - GABA transaminazePCA - PCAROS - ROSS-adenosylmethionine decarboxylase - S-adenosylmethionine dearboxylaseSpermine - اسپرمSpermidine - اسپرمیدینγ-aminobutyric acid - اسید γ-آمینوبوتیریکPerchloric acid - اسید پرکلریکDAO - دائوDiamine oxidase - دیامین اکسیدازPUT - قرار دادنputrescine - قرار دادنRelative water content - محتوای آب نسبیPolyamine - پلی آمینpolyamine oxidase - پلیامین اکسیدازtricarboxylic acid cycle - چرخه اسید تریکاربوکیلیکGABA - گاباGlu - گلوglutamate - گلوتاماتGlutamate decarboxylase - گلوتامات دکربوکسیلازReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Application of γ-aminobutyric acid demonstrates a protective role of polyamine and GABA metabolism in muskmelon seedlings under Ca(NO3)2 stress Application of γ-aminobutyric acid demonstrates a protective role of polyamine and GABA metabolism in muskmelon seedlings under Ca(NO3)2 stress](/preview/png/8354926.png)
چکیده انگلیسی
The effects of exogenous γ-aminobutyric acid (GABA) application on growth, polyamine and endogenous GABA metabolism in muskmelon leaves and roots were measured. Plants were treated under control or 80 mM Ca(NO3)2 stress conditions with or without foliar spraying 50 mM GABA. Ca(NO3)2 stress significantly suppressed seedling growth and GABA transaminase activity, and enhanced glutamate decarboxylase (GAD) activity and endogenous GABA levels. Polyamine (PA) biosynthesis and degradation capacity increased in parallel with increasing GAD activity. Exogenous GABA application effectively alleviated the growth inhibition caused by Ca(NO3)2 stress, and significantly enhanced the activities of arginine decarboxylase (ADC), ornithine decarboxylase (ODC), S-adenosylmethionine decarboxylase (SAMDC), polyamine oxidase (PAO), and diamine oxidase (DAO). Exogenous GABA also significantly reduced the accumulation of free putrescine (Put) and increased the levels of free spermidine (Spd) and spermine (Spm) in leaves, which improved the capacity for polyamine biosynthesis. Application of exogenous GABA under Ca(NO3)2 stress enables the plants to maintain a higher ratio of free Spd and free Spm with respect to free Put. Our data suggest that exogenous GABA has an important role in improving muskmelon seedling tolerance to Ca(NO3)2 stress by improving biosynthesis of PAs and GABA, and by preventing PA degradation. There is a potential positive feedback mechanism that results from higher endogenous GABA content and the combined effects of Ca(NO3)2 stress and exogenous GABA, which coordinately alleviate Ca(NO3)2 stress injury by enhancing PA biosynthesis and converting free Put to an insoluble bound PA form, and reduce PA degradation in muskmelon seedlings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 92, July 2015, Pages 1-10
Journal: Plant Physiology and Biochemistry - Volume 92, July 2015, Pages 1-10
نویسندگان
Xiaohui Hu, Zhiran Xu, Weinan Xu, Jianming Li, Ning Zhao, Yue Zhou,