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The ULT trxG factors play a role in Arabidopsis fertilization.

Plant Signal Behav. 2014;9(12):e977723. doi:10.4161/15592324.2014.977723
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摘要


Trithorax group (trxG) and Polycomb group (PcG) proteins are epigenetic modifiers that play key roles in eukaryotic development by promoting active or repressive gene expression states, respectively. Although PcG proteins have well-defined roles in controlling developmental transitions, cell fate decisions and cellular differentiation in plants, relatively little is known about the functions of plant trxG factors. We recently determined the biological roles for the ULT1 and ULT2 trxG genes during Arabidopsis vegetative and reproductive development. Our study revealed that ULT1 and ULT2 genes have overlapping activities in regulating Arabidopsis shoot and floral stem cell activity, and that they have a redundant function in establishing the apical-basal polarity axis of the gynoecium. Here we present data that ult1 and ult1 ult2 siliques contain a significant proportion of aborted ovules, supporting an additional role for ULT1 in Arabidopsis fertility. Our results add to the number of plant developmental processes that are regulated by trxG activity.

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