CSIRO Plant Industry, GPO Box 1600, Canberra, ACT 2601, Australia.
J Exp Bot. 2011 Jan;62(2):487-95. doi: 10.1093/jxb/erq295. Epub 2010 Oct 15.
Since the discovery of miRNAs in plants it has become clear that they are central to the regulation of many aspects of plant development and responses to the environment. miR172 regulates expression of a small group of AP2-like transcription factors in an evolutionarily ancient interaction. miR172 functions in regulating the transitions between developmental stages and in specifying floral organ identity. These two roles are conserved across monocotyledons and dicotyledons. Investigations into the roles of miR172 and its targets in phase changes in the model plant Arabidopsis have illustrated that this process is governed by complex regulatory systems. In addition to its conserved roles, miR172 has also acquired specialized species-specific functions in other aspects of plant development such as cleistogamy and tuberization.
自从在植物中发现 miRNAs 以来，人们已经清楚地认识到它们在植物发育的许多方面以及对环境的响应中起着核心作用。miR172 在一个古老的进化过程中调控一小群 AP2 样转录因子的表达。miR172 在调控发育阶段之间的转变和特化花器官身份方面发挥作用。这两个作用在单子叶植物和双子叶植物中是保守的。对模式植物拟南芥中 miR172 及其靶标在相变中的作用的研究表明，这个过程是由复杂的调控系统控制的。除了其保守的作用外，miR172 在植物发育的其他方面也获得了专门的物种特异性功能，例如闭花受精和块茎形成。
