MAPK kinase 10.2 promotes disease resistance and drought tolerance by activating different MAPKs in rice

• DOI: 10.1111/tpj.13674
• Publication Date: 2017-08-31T11:43:52Z
• Authors: Haigang Ma; Jie Chen; Zhenzhen Zhang; Ling Ma; Zeyu Yang; Qinglu Zhang; Xianghua Li; Jinghua Xiao; Shiping Wang
• Keywords: Drought Resistance

Mitogen-activated protein kinase (MAPK) cascades, with each cascade consisting of a MAPK (MAPKKK), (MAPKK) and MAPK, have important roles in different biological processes. However, the signal transduction rice cascades remains to be elucidated. We show that structural non-canonical MAPKK, MPKK10.2, enhances resistance Xanthomonas oryzae pv. oryzicola (Xoc), which causes bacterial streak disease, increases tolerance drought stress by phosphorylating activating two MAPKs, MPK6 MPK3, respectively. MPKK10.2-overexpressing (oe) plants showed enhanced both Xoc drought, whereas MPKK10.2-RNA interference (RNAi) had increased sensitivity drought. MPKK10.2 physically interacted phosphorylated MAPKs vivo. Transcriptionally modulating influenced phosphorylation during rice-Xoc interaction, MPKK10.2-oe/MPK6-RNAi double mutants Xoc. MPKK10.2-oe/MPK3-RNAi survival rates similar those control plants, although transgenic changed after stress. These results suggest is node involved response biotic abiotic responses functioning cross-point leading tolerance.