OsWRKY21 and OsWRKY108 function redundantly to promote phosphate accumulation through maintaining the constitutive expression of OsPHT1;1 under phosphate-replete conditions.

OsWRKY21 and OsWRKY108 function redundantly to promote phosphate accumulation through maintaining the constitutive expression of OsPHT1;1 under phosphate-replete conditions.
复制标题

OsWRKY21 和 OsWRKY108 在磷酸盐充足的条件下通过维持 OsPHT1;1 的组成型表达来冗余地促进磷酸盐积累

DOI:
10.1111/nph.16931
复制
发表时间:
2021-03
期刊:
The New phytologist
影响因子:
--
通讯作者:
Xu G
Xu G
中科院分区:
其他
文献类型:
--
作者:
Zhang J;Gu M;Liang R;Shi X;Chen L;Hu X;Wang S;Dai X;Qu H;Li H;Xu G

文献摘要

参考文献

相似文献

植物磷酸盐转运蛋白1(PHT 1)可能是唯一的磷(Pi)吸收的内流转运蛋白,在足够的Pi水平下部分降解,以防止过量的Pi积累。因此,PHT 1基因的基础/组成型表达水平对于在Pi充足条件下维持Pi摄取至关重要。水稻(Oryza sativa)OsPHT 1;1是一个独特的基因,因为它是高表达的,并且不响应于Pi,然而维持其基础/组成型表达的机制仍然未知。使用生物化学和遗传学的方法,我们确定和功能特点的转录因子维持基础/组成型表达的OsPHT 1;1。OsWRKY 21和OsWRKY 108在细胞核内相互作用,并且都与OsPHT 1;1启动子中的W-盒结合。OsWRKY 21或OsWRKY 108的过表达导致Pi积累增加,这是由于OsPHT 1的表达升高所致;1.相比之下,oswrky 21 oswrky 108双突变体以Pi依赖的方式显示出Pi积累和OsPHT 1;1表达的降低。此外,与ospht 1;1突变体类似,表达OsWRKY 21-SRDX融合蛋白(嵌合显性抑制子)的植物在Pi-replete根中的Pi积累受损,伴随着OsPHT 1;1表达的下调。我们的研究结果表明,水稻WRKY转录因子的功能冗余,以促进磷的吸收,通过激活OsPHT 1;1表达在Pi-replete条件下,并代表了一个新的途径,独立于中央Pi信号系统。
Plant Phosphate Transporter 1 (PHT1) proteins, probably the only influx transporters for phosphate (Pi) uptake, are partially degraded on sufficient Pi levels to prevent excessive Pi accumulation. Therefore, the basal/constitutive expression level of PHT1 genes is vital for maintaining Pi uptake under Pi‐replete conditions. Rice (Oryza sativa) OsPHT1;1 is a unique gene as it is highly expressed and not responsive to Pi, however the mechanism for maintaining its basal/constitutive expression remains unknown. Using biochemical and genetic approaches, we identified and functionally characterised the transcription factors maintaining the basal/constitutive expression of OsPHT1;1. OsWRKY21 and OsWRKY108 interact within the nucleus and both bind to the W‐box in the OsPHT1;1 promoter. Overexpression of OsWRKY21 or OsWRKY108 led to increased Pi accumulation, resulting from elevated expression of OsPHT1;1. By contrast, oswrky21 oswrky108 double mutants showed decreased Pi accumulation and OsPHT1;1 expression in a Pi‐dependent manner. Moreover, similar to ospht1;1 mutants, plants expressing the OsWRKY21–SRDX fusion protein (a chimeric dominant suppressor) were impaired in Pi accumulation in Pi‐replete roots, accompanied by downregulation of OsPHT1;1 expression. Our findings demonstrated that rice WRKY transcription factors function redundantly to promote Pi uptake by activating OsPHT1;1 expression under Pi‐replete conditions, and represent a novel pathway independent of the central Pi signalling system.
OsMYB2P-1 是一种 R2R3 MYB 转录因子,参与水稻磷酸盐饥饿反应和根结构的调节
DOI: 10.1104/pp.112.194217
发表时间: 2012-05-01
期刊: PLANT PHYSIOLOGY
影响因子: 7.4
作者:
Dai, Xiaoyan;Wang, Yuanyuan;Zhang, Wen-Hao
通讯作者: Zhang, Wen-Hao
磷酸盐转运蛋白基因 OsPht1;8 参与水稻磷酸盐稳态
DOI: 10.1104/pp.111.175240
发表时间: 2011-07-01
期刊: PLANT PHYSIOLOGY
影响因子: 7.4
作者:
Jia, Hongfang;Ren, Hongyan;Xu, Guohua
通讯作者: Xu, Guohua
水稻磷酸盐转运蛋白 OsPHT1;3 在极低磷酸盐条件下介导磷酸盐的吸收、转运和再动员
DOI: 10.1104/pp.18.01097
发表时间: 2019-02-01
期刊: PLANT PHYSIOLOGY
影响因子: 7.4
作者:
Chang, Ming Xing;Gu, Mian;Xu, Guo Hua
通讯作者: Xu, Guo Hua
DOI: 10.1105/tpc.113.116251
发表时间: 2013-10-01
期刊: PLANT CELL
影响因子: 11.6
作者:
Jabnoune, Mehdi;Secco, David;Poirier, Yves
通讯作者: Poirier, Yves
DOI: 10.1105/tpc.108.064980
发表时间: 2009-11-01
期刊: PLANT CELL
影响因子: 11.6
作者:
Chen, Yi-Fang;Li, Li-Qin;Wu, Wei-Hua
通讯作者: Wu, Wei-Hua