图2. LLG与RLK家族蛋白不同成员互作调控花粉与根发育以及盐胁迫与免疫应答过程
(A) LLG2/3与ANX1/2和BUPS1/2互作调控花粉管生长与爆裂; (B) LLG1与FER互作调控根与根毛生长; (C) LLG1与FER互作调控盐胁迫应答; (D) LLG1与FLS2和EFR互作调控免疫应答。ABA: 脱落酸; ABI2: A型 PP2Cs磷酸酶; AGB1: 异源三聚体G蛋白β亚基; AHA2: 质膜H⁺-ATPase 2; ANX1/2: ANXUR1/2; BAK1: 油菜素受体激酶; BIK1: Botrytis诱导激酶1; BUPS1/2: 佛祖之金字亚贴1/2; ECD: 胞外结构域; EDR1: 负调控抗病蛋白1; EFR: 延伸因子Tu受体; elf18: 细菌延伸因子Tu N端18个氨基酸小肽; exJM: 胞外近膜结构域; FER: FERONIA; flg22: 细菌鞭毛蛋白N端22个氨基酸小肽保守基序; FLS2: 鞭毛蛋白传感蛋白2; GDP: 鸟苷二磷酸; GEF1/4/10: 鸟嘌呤核苷酸交换因子1/4/10; GTP: 鸟苷三磷酸; KD: 激酶结构域; LLG1/2/3: 类LORELEI糖基磷脂酰肌醇锚定蛋白1/2/3; LRR: 富含亮氨酸重复序列; LRX: 富含亮氨酸重复序列的延展蛋白; MAPK: 丝裂原活化蛋白激酶; MKK: 丝裂原激活的蛋白激酶激酶; MLD: 类Malectin结构域; NSCC: 非选择性阳离子通道; PR1: 病程相关因子1; RALF: 快速碱化因子; Rboh: 呼吸爆发氧化酶; ROP1/11: 植物Rho相关小G蛋白1/11; S1P: 位点-1蛋白酶; SLAC1: 慢阴离子通道蛋白1; SnRK2: 丝氨酸/苏氨酸蛋白激酶SnRK2D; TM: 跨膜结构域。实线表示直接调控过程, 虚线表示间接调控过程或物质转运。箭头表示促进, T表示抑制。

Figure 2. Interaction between different members of the LLG and RLK family proteins regulates pollen and root development and salt and immune response processes
(A) LLG2/3 interacts with ANX1/2 and BUPS1/2 to regulate pollen tube growth and burst; (B) LLG1 interacts with FER to regulate root and root hair growth; (C) LLG1 interacts with FER to regulate salt stress response; (D) LLG1 interacts with FLS2 and EFR to regulate the immune response. ABA: Abscisic acid; ABI2: ABA insensitive 2; AGB1: Heterotrimeric G-protein β-subunit; AHA2: Plasma membrane H⁺-ATPase 2; ANX1/2: ANXUR1/2; BAK1: Brassinosteroid insensitive 1-associated receptor kinase 1; BIK1: Botrytis-induced kinase 1; BUPS1/2: Buddha’s paper seal1/2; ECD: Extracellular domain; EDR1: Enhanced disease resistance 1; EFR: EF-Tu receptor; elf18: 18 amino acid peptide of EF-Tu N-terminus; eXJM: Extracellular membrane domain; FER: FERONIA; flg22: 22 amino acid peptide of bacterial flagellin N-terminus; FLS2: Flagellin sensing 2; GDP: Guanosine diphosphate; GEF1/4/10: Guanine nucleotide exchange factor1/4/10; GTP: Guanosine triphosphate; KD: Kinase domain; LLG1/2/3: LORELEI-like GPI-anchored protein1/2/3; LRR: Leucine-rich repeat; LRX: Leucine-rich repeat extensin-like protein; MAPK: Mitogen-activated protein kinase; MKK: Mitogen-activated protein kinase kinase; MLD: Malectin-like domain; NSCC: Non-selective cation channels; PR1: Pathogenesis-related factor 1; RALF: Rapid alkalinization factor; Rboh: Respiratory burst oxidase homolog; ROP1/11: Rho-related GTPase1/11 from plants; S1P: Site-1 protease; SLAC1: Slow anion channel 1; SnRK2: Serine/threonine-protein kinase SnRK2D; TM: Transmembrane domain. The solid line represents the direct regulation process, the dotted line represents the indirect regulation process or material transport. The arrow represents promotion, and the T represents inhibition.