Differential expression of genes for response regulators in response to cytokinins and nitrate in Arabidopsis thaliana

被引：100

作者：

Kiba, T ^{[1
]}

Taniguchi, M ^{[1
]}

Imamura, A ^{[1
]}

Ueguchi, C ^{[1
]}

Mizuno, T ^{[1
]}

Sugiyama, T ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Bioagr Sci, Dept Biol Mechanisms & Funct, Nagoya, Aichi 4648601, Japan

来源：

PLANT AND CELL PHYSIOLOGY | 1999年 / 40卷 / 07期

关键词：

Arabidopsis thaliana; His to Asp phosphorelay; response regulator; signal transduction;

D O I：

10.1093/oxfordjournals.pcp.a029604

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

In Arabidopsis thaliana, a number of response regulators are presumably involved in His-Asp phosphorelay signal transduction in response to environmental stimuli, such as phytohormones. Previously, it was shown that expression of a certain set of genes for response regulators are cytokinin- and nitrate-responsive in their mRNA accumulation, under certain growth conditions [Taniguchi et al. (1998) FEES Lett. 429: 259, Brandstatter and Kieber (1998) Plant Cell 10: 1009]. To answer the critical question of whether or not other response regulator genes, so far identified in Arabidopsis thaliana, are also cytokinin-inducible, here an extended comparative examination was carried out. It was demonstrated that not all of response regulator genes are necessarily cytokinin-responsive in their transcription. Rather, the members of a certain subfamily (type-A) are cytokinin-responsive, but those belonging to the other (type-B) are not. The presumed nitrate-responsiveness was also assessed for the same set of response regulators, and the analogous view was supported. These results suggest that the two subtypes of response regulators differ from each other, as judged from not only their structural designs, but also the expression profiles of their transcripts in response to plant stimuli.

引用

页码：767 / 771

页数：5