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
![عکس صفحه اول مقاله: An ethylene and ROS-dependent pathway is involved in low ammonium-induced root hair elongation in Arabidopsis seedlings An ethylene and ROS-dependent pathway is involved in low ammonium-induced root hair elongation in Arabidopsis seedlings](/preview/png/2015519.png)
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,