Yu Yanwen, Huang Rongfeng
Biotechnology Research Institute, Chinese Academy of Agricultural Sciences Beijing, China.
Biotechnology Research Institute, Chinese Academy of Agricultural SciencesBeijing, China; National Key Facility of Crop Gene Resources and Genetic ImprovementBeijing, China.
Front Plant Sci. 2017 Jan 24;8:57. doi: 10.3389/fpls.2017.00057. eCollection 2017.
As an ideal model for studying ethylene effects on cell elongation, hypocotyl growth is widely used due to the unique characteristic that ethylene stimulates hypocotyl elongation in the light but inhibits it in the dark. Although the contrasting effect of ethylene on hypocotyl growth has long been known, the molecular basis of this effect has only gradually been identified in recent years. In the light, ethylene promotes the expression of (PIF3) and the degradation of ELONGATED HYPOCOTYL 5 (HY5) protein, thus stimulating hypocotyl growth. In the dark, (ERF1) and (WDL5) induced by ethylene are responsible for its inhibitory effect on hypocotyl elongation. Moreover, CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) and PHYTOCHROME B (phyB) mediate the light-suppressed ethylene response in different ways. Here, we review several pivotal advances associated with ethylene-regulated hypocotyl elongation, focusing on the integration of ethylene and light signaling during seedling emergence from the soil.
作为研究乙烯对细胞伸长影响的理想模型，下胚轴生长因其独特的特性而被广泛应用，即乙烯在光照下刺激下胚轴伸长，而在黑暗中抑制下胚轴伸长。尽管乙烯对下胚轴生长的相反作用早已为人所知，但这种作用的分子基础直到近年来才逐渐被确定。在光照下，乙烯促进（PIF3）的表达和伸长下胚轴5（HY5）蛋白的降解，从而刺激下胚轴生长。在黑暗中，乙烯诱导的（ERF1）和（WDL5）对其抑制下胚轴伸长起作用。此外，组成型光形态建成1（COP1）和光敏色素B（phyB）以不同方式介导光抑制的乙烯反应。在这里，我们综述了与乙烯调节下胚轴伸长相关的几个关键进展，重点关注幼苗从土壤中出土过程中乙烯信号和光信号的整合。
