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Molecular and Functional Characterization of ZmNF-YC14 in Transgenic Arabidopsis
Yilin Cai,Xiupeng Mei;Ping Li;Lu Wang;Chaoxian Liu;Lian Zhou 한국식물학회 2018 Journal of Plant Biology Vol.61 No.6
The optimum transition stage from vegetative toreproductive development is important for flowering plantsto obtain the desired plant architecture to maximize yield. Inthis study, we overexpressed the maize NUCLEAR FACTORY, SUBUNIT C 14 (ZmNF-YC14) gene in Arabidopsis toinvestigate its potential functions in the regulation of planttransition. Overexpression of ZmNF-YC14 in Arabidopsisinhibited plant flowering and retarded the duration of thebranch-producing inflorescence phase 1 (I1). These plantsexhibited increased length of I1 and higher ratio of inflorescencephase 1 to inflorescence phase (I) (I1:I) under long-dayconditions. As a consequence, these transgenic plants exhibiteddramatic changes in their overall inflorescence morphology. In addition, the phenotypes of inflorescence morphologycaused by ZmNF-YC14 overexpression were enhanced byexogenous gibberellin (GA) treatment, which obtained asignificant increase in I1:I, inflorescence phase 1 to inflorescencephase 2 (I2) (I1:I2), and remarkable decrease in I2 and I2:I intransgenic plants compared to those under normal conditions. Taken together, the results of this study suggest that ZmNFYC14negatively regulates flowering and controls flowerformation under long-day conditions in Arabidopsis and maybe involved in a GA regulation pathway.