Chinese Bulletin of Botany ›› 2020, Vol. 55 ›› Issue (2): 240-253.DOI: 10.11983/CBB19187

• SPECIAL TOPICS • Previous Articles     Next Articles

Advances of NPH3/RPT2-Like (NRL) Family Proteins in Phototropin-mediated Signaling in Arabidopsis thaliana

Qingping Zhao,Shifan Ma,Ruixi Li,Tianyu Wang,Xiang Zhao()   

  1. Key Laboratory of Plant Stress Biology/State Key Laboratory of Cotton Biology/College of Life Sciences, Henan University, Kaifeng 475004, China
  • Received:2019-09-23 Accepted:2019-12-31 Online:2020-03-01 Published:2020-02-12
  • Contact: Xiang Zhao

Abstract:

Upon blue light-triggered autophosphorylation, the activated PHOT1 and PHOT2 photoreceptors function solely or redundantly to regulate diverse responses, such as stomatal opening, chloroplast movements, phototropism, and leaf positioning and flattening in Arabidopsis thaliana. Members of NPH3/RPT2-Like family (NRL) are necessary to elicit several photo-responses. NPH3 is required for phototropism, leaf expansion and positioning. RPT2 regulates chloroplast accumulation movement besides NPH3-mediated responses. NCH1 was recently identified as a Phot1-interacting protein that functions redundantly with RPT2 to mediate chloroplast accumulation movement, but not chloroplast avoidance movement. This article summarized the function of NRL family members in phototropin-mediated signaling and prospected further research, thus providing clues for fully revealing the function of the NRL family proteins.

Key words: Arabidopsis, blue light, NPH3/RPT2-Like family protein, phototropin