光调控的叶绿体运动研究进展

Research Advances in Light-induced Plant Chloroplast Movement

光可诱导植物叶绿体运动,从而适应环境变化。近年来研究发现,蓝光受体向光素(phototropin,PHOT)参与蓝光诱导的叶绿体运动。弱蓝光下,PHOT1和PHOT2以功能冗余方式介导叶绿体聚集运动;强蓝光下,PHOT2单独介导叶绿体回避运动。PHOT可能通过多种不同的信号途径调节肌动蛋白的运动,从而实现对叶绿体运动速率的调控。此外,Ca2+和H2O2信号分子也参与叶绿体运动的调节。主要综述了介导叶绿体运动的蓝光受体PHOT及信号成分CHUP1、KAC、JAC1、WEB1、THRUMIN1等蛋白对肌动蛋白微丝的调节,并对该领域今后的研究方向进行了展望。

Light induces chloroplast movement in response to environmental changes in plants. Re- cent researches have shown that blue light receptor phototropins（PHOT） are involved in blue light-induced chloroplast movement. Under weak blue light, PHOT1 and PHOT2 contribute redundantly to blue-light-induced chloroplast accumulation movement. Conversely, under strong blue light, PHOT2 alone regulates chloroplast avoidance response. Phototropins may regulate actin filaments dynmaics via various signal pathways so as to control chloroplast movement velocity. In addition, Ca2 and H2 O2 are also involved in regulating chloroplast movement. This paper mainly reviewed the control of actin filaments by blue light receptor phototropins and signal components such as CHUP1 ,KAC,JAC1, WEB1 and THRUMINI,and finally proposed the possible research directions in this field.