Urano Daisuke, Jackson David, Jones Alan M
Department of Biology, The University of North Carolina, Chapel Hill, Coker Hall, NC 27599-3280, USA.
Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.
J Exp Bot. 2015 Aug;66(15):4511-5. doi: 10.1093/jxb/erv215. Epub 2015 May 6.
Plasticity in plant development is controlled by environmental signals through largely unknown signalling networks. Signalling coupled by the heterotrimeric G protein complex underlies various developmental pathways in plants. The morphology of two plastic developmental pathways, root system architecture and female inflorescence formation, was quantitatively assessed in a mutant compact plant 2 (ct2) lacking the alpha subunit of the heterotrimeric G protein complex in maize. The ct2 mutant partially compensated for a reduced shoot height by increased total leaf number, and had far more ears, even in the presence of pollination signals. The maize heterotrimeric G protein complex is important in some plastic developmental traits in maize. In particular, the maize Gα subunit is required to dampen the overproduction of female inflorescences.
植物发育中的可塑性是由环境信号通过很大程度上未知的信号网络来控制的。异源三聚体G蛋白复合体偶联的信号传导是植物各种发育途径的基础。在玉米中缺乏异源三聚体G蛋白复合体α亚基的紧凑型突变体植株2（ct2）中，对两个可塑性发育途径，即根系结构和雌花序形成的形态进行了定量评估。ct2突变体通过增加总叶片数部分补偿了株高降低的问题，并且即使在有授粉信号的情况下也有更多的雌穗。玉米异源三聚体G蛋白复合体在玉米的一些可塑性发育性状中很重要。特别是，玉米Gα亚基对于抑制雌花序的过度产生是必需的。
