کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2016103 1541939 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modulation of auxin content in Arabidopsis confers improved drought stress resistance
ترجمه فارسی عنوان
مدولاسیون محتوای اکسین در عربیدوپسس باعث بهبود مقاومت به تنش خشکی می شود
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
چکیده انگلیسی


• Endogenous and exogenous auxin positively regulates drought resistance.
• ROS metabolism plays important roles in auxin-mediated dought stress responses.
• Auxin modulates root architecture, stress-related genes and metabolic homeostasis.

Auxin is a well-known plant phytohormone that is involved in multiple plant growth processes and stress responses. In this study, auxin response was significantly modulated under drought stress condition. The iaaM-OX transgenic lines with higher endogenous indole-3-acetic acid (IAA) level and IAA pre-treated wild type (WT) plants exhibited enhanced drought stress resistance, while the yuc1yuc2yuc6 triple mutants with lower endogenous IAA level showed decreased stress resistance in comparison to non-treated WT plants. Additionally, endogenous and exogenous auxin positively modulated the expression levels of multiple abiotic stress-related genes (RAB18, RD22, RD29A, RD29B, DREB2A, and DREB2B), and positively affected reactive oxygen species (ROS) metabolism and underlying antioxidant enzyme activities. Moreover, auxin significantly modulated some carbon metabolites including amino acids, organic acids, sugars, sugar alcohols and aromatic amines. Notably, endogenous and exogenous auxin positively modulated root architecture especially the lateral root number. Taken together, this study demonstrated that auxin might participate in the positive regulation of drought stress resistance, through regulation of root architecture, ABA-responsive genes expression, ROS metabolism, and metabolic homeostasis, at least partially.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 82, September 2014, Pages 209–217
نویسندگان
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