Glossy15 Plays an Important Role in the Divergence of the Vegetative Transition between Maize and Its Progenitor, Teosinte
Dear Editor,The timing of developmental transitions is important for plant growth and environmental adaptation.All plants undergo a series of developmental transitions during their life cycles,and each of these phases is characterized by unique morphological and physiological attributes (B(a)urle and Dean,2006).In maize,the vegetative transition from juvenile-to-adult vegetative development occurs in a coordinated manner and is marked by the production of leaves that differ in a suite of morphological and physiological traits,many of which contribute to fitness and crop productivity (Moose and Sisco,1994).Significant advances have been made in understanding the molecular mechanisms regulating the juvenile-to-adult vegetative transition.Glossy15 (Gl15),an APETALA2 (AP2)-like transcription factor,plays a key role in promoting juvenile leaf identity traits and suppressing adult leaf identity traits (Moose and Sisco,1996).microRNA172 (miR172) is a negative regulator that antagonizes the activity of Gl15 by mediating Gl15 mRNA degradation (Lauter et al.,2005).The dominant Comgrass1 (Cg1) mutant initiates more juvenile leaves than wild-type plants do,and this phenotype was found to be caused by the ectopic overexpression of two tandem microRNA156 (miR156) genes (Chuck et al.,2007).In Cg1 mutants,overexpression of miR156 causes a decrease of miR172,which then leads to an increase in expression of Gl15 (Chuck et al.,2007).This regulatory circuit of miR172,miR156,and AP2 transcription factor appears to be a general mechanism for regulating vegetative phase changes in higher plants.
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This research was supported by the National Key Research and Development Program of China2016YFD0100303 and 2016YFD0100404;the Recruitment Program of Global Experts and the Fundamental Research Funds for the Central Universities
2018-03-21（万方平台首次上网日期，不代表论文的发表时间）
共5页
1579-1583
