GmMEKK2 Disrupts the MKK1/2-MPK4 Cascade to Amplify Immune Signalling and Confer Enhanced Resistance to Soybean Mosaic Virus.

ABSTRACT: Mitogen-activated protein kinase kinase kinase (MAPKKK) assumes a pivotal position within the MAPK cascade, converting external stimuli into intracellular responses and mediating plant stress resistance. However, there are limited reports investigating its function in regulating resistance to soybean mosaic virus (SMV). Here, a MAPKKK2-like gene GmMEKK2 (LOC100798607) was identified from an SMV-resistant cultivar, with an amino acid sequence containing the typical conserved G(T/S)Px(W/Y/F)MAPExV domain, showing homology to AtMEKK1, AtMEKK2 (SUMM1) and OsMAPKKK5. Overexpression of GmMEKK2 in soybean reduced SMV accumulation and the disease index, mitigated the yield loss after SMV inoculation and improved yield traits. In contrast, silencing GmMEKK2 via virus-induced gene silencing (VIGS) s

SUBMITTER: Zhong X 

PROVIDER: S-EPMC12665255 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature