Table 3.

Non-LRR RLKs and RLPs associated with plant-microbe interactions, innate immunity and defense

Gene	Plant	Class	Type	Function	Perception	Putative ligands	References
At-RLK3	Arabidopsis thaliana	DUF-26	RD-kinase	Expressed under oxidative stress and pathogen attack	Nonself recognition: altered self		119
CERK1	Arabidopsis thaliana	LysM	RD-kinase	Chitin elicitor signaling *Homologue of LysM RLK1	Nonself recognition: different origins	chitin	120
CHRK1	Nicotiana tabacum	Chitinase	RD-kinase	Induced by tobacco mosaic virus, Phytophthora parastitica	Nonself recognition: different origins		79
LecRK-a1	Arabidopsis thaliana	Lectin	RLP	Expressed during wounding	Nonself recognition: altered self		121
LRK10	Triticum aestivum	‘Other’/S-domain	Non-RD-kinase	Specific resistance to wheat rust fungi	Nonself recognition: different origins		122, 123
LYK3	Medicago truncatula	LysM	RD-kinase	Involved in early events during nitrogen fixation symbiosis (symbiotic interactions) *Orthologue of NFR1	Symbiotic relationship, recognition of different origins	Nod factors	124
LYK4	Medicago truncatula	LysM	RD-kinase	Involved in early events during nitrogen fixation symbiosis (symbiotic interactions)	Symbiotic relationship, recognition of different origins	Nod factors	124
LysM RLK1	Arabidopsis thaliana	LysM	RD-kinase	Chitin elicitor signalling *Homologue of CerK1	Nonself recognition: different origins	chitin	125
NARK	Glycine max		RD-kinase	Nodule development during nitrogen fixation symbiosis *Orthologue of HAR1	Symbiotic relationship, recognition of different origins		126
NFR1	Lotus japonicas	LysM	RD-kinase	Involved in early events during nitrogen fixation symbiosis (symbiotic interactions) *Orthologue of LYK3	Symbiotic relationship, recognition of different origins	Nod factors	127
NFR5	Lotus japonicas	LysM	RD-kinase	Involved in early events during nitrogen fixation symbiosis (symbiotic interactions) *Orthologue of SYM10	Symbiotic relationship, recognition of different origins	Nod factors	128
PBS1	Arabidopsis thaliana	RLCK	RD-kinase	Specific resistance to Pseudomonas syringae pv phaseolicola	Nonself recognition: different origins		129
PERK1	Brassica napus	RLK	RD-kinase	Sensing of cell wall damage due to wounding by pathogens	Nonself recognition: altered self		60
Pi-d2	Oryza sativa	LecrK/S-domain	Non-RD-kinase	R gene that confers resistance to blast disease	Nonself recognition: different origins		130
PnLPK	Populus nigra var. Italic (Lombardy poplar)	Lectin-like	RD-kinase	Expressed during wounding	Nonself recognition: altered self		131
PR5K	Arabidopsis thaliana	PR5	Non-RD-kinase	Disease/stress response	Nonself recognition: altered self		78
PvRK20-1	Phaseolus vulgaris	DUF-26	RD-kinase	Expressed during wounding and plant-microbe interactions	Nonself recognition: altered self		132
RFO1	Arabidopsis thaliana	WAK/EGF	RD-kinase	Involved in resistance response to Fusarium oxysporum	Nonself recognition: different origins		133
RKC1	Arabidopsis thaliana	DUF-26	RD-kinase	Salicylic acid inducible	Nonself recognition: altered self		100
RKS1, 2	Arabidopsis thaliana	S-domain	RD-kinase	Salicylic acid inducible	Nonself recognition: altered self		100
RLK1	Arabidopsis thaliana	S-domain	RLP	Salicylic acid inducible	Nonself recognition: altered self		134
RLK4	Arabidopsis thaliana	DUF26	RD-kinase	Salicylic acid inducible	Nonself recognition: altered self		135
SFR1, 2	Brassica oleracea	S-domain	RD-kinase	Defense response signaling, wounding, pathogenic (Xanthomonas campestris, Ralstonia solanacearum) and non-pathogenic (Escherichia coli; E. coli) bacterial infection	Nonself recognition: different origins & altered self		136
SYM10	Pisum sativum	LysM	RD-kinase	Involved in early events during nitrogen fixation symbiosis (symbiotic interactions) *Orthologue of NFR5	Symbiotic relationship, recognition of different origins	Nod factors	128
WAK1 to 4	Arabidopsis thaliana	WAK/EGF	RD-kinase	Cell expansion and disease response, Pseudomonas syringae (compatible), repressed by wounding	Nonself recognition: altered self		137–140