Chinese Bulletin of Botany ›› 2020, Vol. 55 ›› Issue (5): 541-550.DOI: 10.11983/CBB20058

• INVITED REVIEW • Previous Articles     Next Articles

Advances of LORELEI-like Glycosylphosphatidylinositol-anchor (LLG) Proteins in Plants

Sijia Li1, Yongxue Zhang1, Mingsheng Jia2, Ying Li1, Shaojun Dai2,*()   

  1. 1Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin 150040, China
    2Shanghai Plant Germplasm Resources Engineering Technology Research Center, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
  • Received:2020-04-05 Accepted:2020-05-20 Online:2020-09-01 Published:2020-09-03
  • Contact: Shaojun Dai

Abstract: The outer surface of plasma membrane (PM)-localized LORELEI-like glycosylphosphatidylinositol-anchor (LLG) proteins, as the molecular chaperone of CrRLK1Ls family of receptor-like kinase, are involved in the transport of CrRLKs and extracellular signal transduction, regulating plant reproduction, development, as well as immune and stress responses. LLG2/3 interacting with ANX and BUPS regulates pollen tube growth and rupture. LLG1 interacted with FER activates the ROPGEF1-ROP2-NADPH oxidase pathway for ROS production, and then promotes root cell elongation and root hair growth. Besides, LLG1, as co-receptor of FER, interacts with RALFs, and then regulates G protein β (AGB1), PM H +-ATPase activity, as well as the homeostasis of intracellular ROS and Ca 2+, for modulating stomata and roots in response to salinity. For immune response, LLG1 interacts with FLS2 and EFR, activating the downstream RbohD for ROS production. This review provides important information for understanding LLG biological functions.

Key words: LLG, RALF, pollen tube, root, immune and salinity responses