Dear Editor,In flowering plants,the life cycle alteates between diploid sporophyte and haploid gametophyte generations.Development of the male organ and germ cells is essential for successful plant fertility and crop yield.Male reproduction is a highly orchestrated process controlled by various intrinsic components.Although significant advances have been made in understanding male gametophyte formation,the molecular mechanisms controlling this process are still largely unknown (Zhang and Liang,2016).