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

被引：51
|
作者：
Hachiya, Takushi [1 ]
Mizokami, Yusuke [1 ]
Miyata, Kazunori [1 ]
Tholen, Danny [2 ]
Watanabe, Chihiro K. [1 ]
Noguchi, Ko [1 ]
机构：
[1] Univ Tokyo, Grad Sch Sci, Dept Biol Sci, Bunkyo Ku, Tokyo 1130033, Japan
[2] Partner Inst Computat Biol, Plant Syst Biol Grp, Shanghai 200031, Peoples R China
来源：
JOURNAL OF PLANT RESEARCH | 2011年 / 124卷 / 03期
关键词：
Ammonium tolerance; Ammonium toxicity; Nitrate sensor; NRT1.1; CHL1; FUNCTIONS; TRANSPORTER; METABOLISM; MUTANT; GENE; NITROGEN; SENSITIVITY; PH;
D O I：
10.1007/s10265-010-0385-7
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
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.
引用
收藏
页码：425 / 430
页数：6
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