摘要
MicroRNA(miRNA)是一类20～24nt的非编码小RNA,通过与靶mRNA序列的互补配对产生特异性,抑制了mRNA的表达或使其降解,从而调控靶基因的表达。而植物必须要开花结果,这是物种能够得以维持延续的一个基本要求。作者主要综述了3类调控开花时间的miRNA家族成员:miR172,miR159/miR319和miR156。其中,miR156主要调控植物生长周期转变;miR172通过调控AP2类基因,控制开花时间和花器官的形成;miR159和miR319的过量表达均会引起一些花发育障碍,如花期延迟。此外,还介绍了其他一些与花发育相关的miRNA,并对miRNA在花器官形成和发育中的研究方向做出了展望。
MicroRNAs is 20 nt to 24 nt, small noncoding RNAs. Specificity is provided by base pairing of the miRNA to miRNA target sequence, leading to translational repression or degradation of mRNA. Three miRNA families （miR172, miR159/miR319 and miR156） involved in flowering time regulation has recently been reviewed, miR156 is a master regulator in the phase changing from vegetative phase to reproductive phase; miR172 is involved in the regulation of flowering time and floral organ identity in Arabidopsis thaliana through regulation of expression of APETALA2 （AP2）-like genes. The over expression of miR319 and miR159 results in several developmental defects, included a delay in flowering. In addition, we demonstrate some other miRNAs related to floral development. Finally, some perspectives are discussed.
出处
《中国农学通报》
CSCD
北大核心
2010年第13期267-271,共5页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金(30871681)
江苏省科技基础设施建设计划(BM2008008)
