Evidence for a nitrate-independent function of the nitrate sensor NRT1.1 in Arabidopsis thaliana

被引：0
|
作者：
Takushi Hachiya
Yusuke Mizokami
Kazunori Miyata
Danny Tholen
Chihiro K. Watanabe
Ko Noguchi
机构：
[1] The University of Tokyo,Department of Biological Sciences, Graduate School of Science
[2] Partner Institute of Computational Biology,Plant Systems Biology Group
来源：
Journal of Plant Research | 2011年 / 124卷
关键词：
Ammonium tolerance; Ammonium toxicity; Nitrate sensor; NRT1.1;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
NRT1.1 is a putative nitrate sensor and is involved in many nitrate-dependent responses. On the other hand, a nitrate-independent function of NRT1.1 has been implied, but the clear-cut evidence is unknown. We found that NRT1.1 mutants showed enhanced tolerance to concentrated ammonium as sole N source in Arabidopsis thaliana. This unique phenotype was not observed in mutants of NLP7, which has been suggested to play a role in the nitrate-dependent signaling pathway. Our real-time PCR analysis, and evidence from a literature survey revealed that several genes relevant to the aliphatic glucosinolate-biosynthetic pathway were regulated via a nitrate-independent signal from NRT1.1. When taken together, the present study strongly suggests the existence of a nitrate-independent function of NRT1.1.
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页码：425 / 430
页数：5
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