Dual Activities of Receptor-like Kinase OsWAKL21.2 Induce Immune Responses.

Dual Activities of Receptor-like Kinase OsWAKL21.2 Induce Immune Responses. Plant Physiol. 2020 Apr 30;: Authors: Malukani KK, Ranjan A, Jyothi HS, Patel HK, Sonti RV Abstract Plant pathogens secrete cell wall-degrading enzymes (CWDEs) that degrade various components of the plant cell wall. Plants sense this cell wall damage as a mark of infection and induce immune responses. However, the plant functions that are involved in the elaboration of cell wall damage-induced immune responses remain poorly understood. Transcriptome analysis revealed that a rice (Oryza sativa) receptor-like kinase, WALL-ASSOCIATED KINASE-LIKE 21 (OsWAKL21.2), is upregulated following treatment with either Xanthomonas oryzae pv. oryzae (Xoo, a bacterial pathogen) or lipaseA/esterase (LipA: a CWDE of Xoo). Overexpression of OsWAKL21.2 in rice induces immune responses similar to those activated by LipA treatment. Downregulation of OsWAKL21.2 attenuates LipA-mediated immune responses. Heterologous expression of OsWAKL21.2 in Arabidopsis thaliana also activates plant immune responses. OsWAKL21.2 is a dual-activity kinase that has in-vitro kinase and guanylate cyclase (GC) activities. Interestingly, kinase activity of OsWAKL21.2 is necessary to activate rice immune responses, whereas in Arabidopsis, OsWAKL21.2 GC activity activates these responses. Our study reveals a rice receptor kinase that activates immune responses in two different species via two different me...
Source: Physiological Research - Category: Physiology Authors: Tags: Plant Physiol Source Type: research