کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2015519 | 1541916 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An ethylene and ROS-dependent pathway is involved in low ammonium-induced root hair elongation in Arabidopsis seedlings
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کلمات کلیدی
DPIPCIBNPAAVG2,3,5-triiodobenzoic acid - 2،3،5-ترییدوبنزوئیک اسیدaminoethoxyvinylglycine - aminoethoxivinylglycineDimethylthiourea - dimethylthioureaDMTU - DMTNH4+ - NH4 +ROS - ROSAmmonium - آمونیومAg+ - آگ +Ethylene - اتیلنTIBA - برگرفته ازdiphenylene iodonium - دیوفنیلن یدونیومroot hair - ریشه موNitrogen - نیتروژنReactive oxygen species - گونههای فعال اکسیژنSilver ions - یون نقره ای
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Root hairs are plastic in response to nutrient supply, but relatively little is known about their development under low ammonium (NH4+) conditions. This study showed that reducing NH4+ for 3 days in wild-type Arabidopsis seedlings resulted in drastic elongation of root hairs. To investigate the possible mediation of ethylene and auxin in this process, seedlings were treated with 2,3,5-triiodobenzoic acid (TIBA, auxin transport inhibitor), 1-naphthylphthalamic acid (NPA, auxin transport inhibitor), p-chlorophenoxy isobutyric acid (PCIB, auxin action inhibitor), aminoethoxyvinylglycine (AVG, chemical inhibitor of ethylene biosynthesis), or silver ions (Ag+, ethylene perception antagonist) under low NH4+ conditions. Our results showed that TIBA, NPA and PCIB did not inhibit root hair elongation under low NH4+ conditions, while AVG and Ag+ completely inhibited low NH4+-induced root hair elongation. This suggested that low NH4+-induced root hair elongation was dependent on the ethylene pathway, but not the auxin pathway. Further genetic studies revealed that root hair elongation in auxin-insensitive mutants was sensitive to low NH4+ treatment, but elongation was less sensitive in ethylene-insensitive mutants than wild-type plants. In addition, low NH4+-induced root hair elongation was accompanied by reactive oxygen species (ROS) accumulation. Diphenylene iodonium (DPI, NADPH oxidase inhibitor) and dimethylthiourea (DMTU, ROS scavenger) inhibited low NH4+-induced root hair elongation, suggesting that ROS were involved in this process. Moreover, ethylene acted together with ROS to modulate root hair elongation under low NH4+ conditions. These results demonstrate that a signaling pathway involving ethylene and ROS participates in regulation of root hair elongation when Arabidopsis seedlings are subjected to low NH4+ conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Physiology and Biochemistry - Volume 105, August 2016, Pages 37-44
Journal: Plant Physiology and Biochemistry - Volume 105, August 2016, Pages 37-44
نویسندگان
Changhua Zhu, Na Yang, Zhengfei Guo, Meng Qian, Lijun Gan,