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  • OsBGLU19 and OsBGLU23 regul...
    LI, Bei-bei; LIU, Ying-gao; WU, Tao; WANG, Ji-peng; XIE, Gui-rong; CHU, Zhao-hui; DING, Xin-hua

    Journal of Integrative Agriculture, 06/2019, Volume: 18, Issue: 6
    Journal Article

    β-Glucosidase belongs to the glycoside hydrolase I family, which is widely present in multiple species and responds to various biotic and abiotic stresses. In rice, whether β-glucosidase is involved in the interaction between plants and microorganisms is not clear. In this study, we found that the expression of several genes encoding β-glucosidases, including OsBGLU19 and OsBGLU23, were upregulated after inoculation with Xanthomonas oryzae pv. oryzicola (Xoc) and downregulated after inoculation with X. oryzae pv. oryzae ( Xoo). The respective insertion mutants of OsBGLU19 and OsBGLU23, bglu19 and bglu23 , were more susceptible to Xoc infection. The expression of OsAOS2, a key gene in the jasmonic acid signal pathway, was dramatically downregulated after inoculation with Xoc in the bglu19 and bglu23 mutants. Simultaneously, the expression of downstream disease resistance-related genes, such as OsPR1a, OsPR5 and a key transcription factors OsWRKY72 were obviously downregulated. The resistance mediated by OsBGLU19 and OsBGLU23 to bacterial leaf streak is related to disease resistance-related genes above mentioned.