SPX1 is an important component in the phosphorus signalling network of common bean regulating root growth and phosphorus homeostasis.
SPX1 is an important component in the phosphorus signalling network of common bean regulating root growth and phosphorus homeostasis.
复制标题
SPX1是菜豆磷信号网络的重要组成部分，调节根系生长和磷稳态。
DOI：
10.1093/jxb/eru183
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发表时间：
2014-07
影响因子：
6.9
通讯作者：
Liao H
中科院分区：
文献类型：
--
作者：
Yao ZF;Liang CY;Zhang Q;Chen ZJ;Xiao BX;Tian J;Liao H
PvSPX1是菜豆P信号网络中的正调控因子，位于PvPHR1下游。含有SPX结构域的蛋白质被认为在植物的磷(P)信号网络中起着至关重要的作用。然而，SPX蛋白在豆科植物中的功能在很大程度上仍不清楚。本研究从菜豆中克隆了三个SPX成员PvSPX1-PvSPX3。结果表明，在磷酸盐饥饿条件下，三个PvSPX成员在菜豆叶片和根中的转录均显著增强。其中，核定位的PvSPX1的表达对PI饥饿表现出更为敏感和快速的反应。只有PvSPX1的过表达才能提高根磷浓度，改变转基因毛状根的形态，如抑制根的生长和增大根毛区。进一步证明，在转基因毛状根中，过表达PvPHR1会上调PvSPX1的转录水平，并导致10个PI饥饿反应基因的转录水平增加。综上所述，PvSPX1是菜豆P信号网络中的正调控因子，位于PvPHR1下游。
PvSPX1 was found to be a positive regulator in the P signalling network of common bean, and is downstream of PvPHR1. Proteins containing the SPX domain are believed to play vital roles in the phosphorus (P) signalling network in plants. However, the functions of SPX proteins in legumes remain largely unknown. In this study, three SPX members, PvSPX1–PvSPX3 were cloned from common bean (Phaseolus vulgaris L.). It was found that the transcripts of all three PvSPX members were significantly enhanced in both bean leaves and roots by phosphate (Pi) starvation. Among them, the expression of nuclear localized PvSPX1 showed more sensitive and rapid responses to Pi starvation. Consistently, only overexpression of PvSPX1 resulted in increased root P concentration and modified morphology of transgenic bean hairy roots, such as inhibited root growth and an enlarged root hair zone. It was further demonstrated that PvSPX1 transcripts were up-regulated by overexpressing PvPHR1, and overexpressing PvSPX1 led to increased transcripts of 10 Pi starvation-responsive genes in transgenic bean hairy roots. Taken together, it is suggested that PvSPX1 is a positive regulator in the P signalling network of common bean, and is downstream of PvPHR1.
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影响因子：
6.9
作者：
Robinson WD;Park J;Tran HT;Del Vecchio HA;Ying S;Zins JL;Patel K;McKnight TD;Plaxton WC
通讯作者：
Plaxton WC
影响因子：
11.6
作者：
Hamburger, D;Rezzonico, E;Poirier, Y
通讯作者：
Poirier, Y
影响因子：
7.3
作者：
Reymond, M;Svistoonoff, S;Desnos, T
通讯作者：
Desnos, T
菜豆中两个假定蛋白磷酸酶基因的特征及其与磷效率的关系
影响因子：
11.4
作者：
Liang, Cui-Yue;Chen, Zhi-Jian;Liao, Hong
通讯作者：
Liao, Hong
影响因子：
7.4
作者：
Liang, Cuiyue;Tian, Jiang;Liao, Hong
通讯作者：
Liao, Hong