Evolution of the ROP GTPase Signaling Module

2009 ◽  
pp. 305-327 ◽  
Author(s):  
John E. Fowler
Keyword(s):  
Rop Gtpase

scholarly journals The Rho-family GTPase OsRac1 controls rice grain size and yield by regulating cell division

2019 ◽  
Vol 116 (32) ◽  
pp. 16121-16126 ◽  
Author(s):  
Ying Zhang ◽  
Yan Xiong ◽  
Renyi Liu ◽  
Hong-Wei Xue ◽  
Zhenbiao Yang
Keyword(s):  
Grain Size ◽  
Cell Division ◽  
Grain Yield ◽  
Molecular Mechanisms ◽  
Grain Filling ◽  
High Yield ◽  
Rice Grain ◽  
Rop Gtpase ◽  
Key Factor ◽  
Grain Width

Grain size is a key factor for determining grain yield in crops and is a target trait for both domestication and breeding, yet the mechanisms underlying the regulation of grain size are largely unclear. Here we show that the grain size and yield of rice (Oryza sativa) is positively regulated by ROP GTPase (Rho-like GTPase from plants), a versatile molecular switch modulating plant growth, development, and responses to the environment. Overexpression of rice OsRac1ROP not only increases cell numbers, resulting in a larger spikelet hull, but also accelerates grain filling rate, causing greater grain width and weight. As a result, OsRac1 overexpression improves grain yield in O. sativa by nearly 16%. In contrast, down-regulation or deletion of OsRac1 causes the opposite effects. RNA-seq and cell cycle analyses suggest that OsRac1 promotes cell division. Interestingly, OsRac1 interacts with and regulates the phosphorylation level of OsMAPK6, which is known to regulate cell division and grain size in rice. Thus, our findings suggest OsRac1 modulates rice grain size and yield by influencing cell division. This study provides insights into the molecular mechanisms underlying the control of rice grain size and suggests that OsRac1 could serve as a potential target gene for breeding high-yield crops.

scholarly journals A ROP GTPase-Dependent Auxin Signaling Pathway Regulates the Subcellular Distribution of PIN2 in Arabidopsis Roots

2012 ◽  
Vol 22 (14) ◽  
pp. 1319-1325 ◽  
Author(s):  
Deshu Lin ◽  
Shingo Nagawa ◽  
Jisheng Chen ◽  
Lingyan Cao ◽  
Xu Chen ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Subcellular Distribution ◽  
Auxin Signaling ◽  
Auxin Signaling Pathway ◽  
Rop Gtpase

Rop GTPase: a master switch of cell polarity development in plants

2001 ◽  
Vol 6 (12) ◽  
pp. 545-547 ◽  
Author(s):  
Ying Fu ◽  
Zhenbiao Yang
Keyword(s):  
Cell Polarity ◽  
Rop Gtpase

scholarly journals Cell Surface ABP1-TMK Auxin-Sensing Complex Activates ROP GTPase Signaling

Science ◽  
2014 ◽  
Vol 343 (6174) ◽  
pp. 1025-1028 ◽  
Author(s):  
T. Xu ◽  
N. Dai ◽  
J. Chen ◽  
S. Nagawa ◽  
M. Cao ◽  
...  
Keyword(s):  
Cell Surface ◽  
Rop Gtpase

scholarly journals ROP GTPase regulation of pollen tube growth through the dynamics of tip-localized F-actin

2003 ◽  
Vol 54 (380) ◽  
pp. 93-101 ◽  
Author(s):  
Y. Gu ◽  
V. Vernoud ◽  
Y. Fu ◽  
Z. Yang
Keyword(s):  
Pollen Tube ◽  
Pollen Tube Growth ◽  
Tube Growth ◽  
Rop Gtpase
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