OsTGA2,OsTGAL1

| Categories genes  | Tags leaf  resistance  defense  disease  salicylic acid  disease resistance  R protein  xoo  blight  blight disease  methyl jasmonate  bacterial blight  xoo  resistant  sa  SA  glucosyltransferase  Xoo  bacterial blight disease  sa 
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  • Key message
    • OsTGA2 confers disease resistance to rice against leaf blight by regulating expression levels of disease related genes via interaction with NH1.
    • Here, we examined biological roles of OsTGA2 (grouped into the same subclade as Arabidopsis TGAs) in bacterial leaf blight resistance
    • Overexpression of OsTGA2 increased resistance of rice to bacterial leaf blight, although overexpression of OsTGA3 resulted in disease symptoms similar to wild type plant upon Xoo infection
    • These results suggest that OsTGA2 can directly regulate the expression of defense related genes and increase the resistance of rice against bacterial leaf blight disease
    • Overexpression of OsTGA2 enhanced the expression of defense related genes containing TGA binding cis-element in the promoter such as AP2/EREBP 129, ERD1, and HOP1
    • Transcriptional level of OsTGA2 was accumulated after treatment with salicylic acid, methyl jasmonate, and Xathomonas oryzae pv
    • Results of quadruple 9-mer protein-binding microarray analysis indicated that OsTGA2 could bind to TGACGT DNA sequence
    • OsTGAL1 suppresses the resistance of rice to bacterial blight disease by regulating the expression of salicylic acid glucosyltransferase OsSGT1.
    • OsSGT1 knockout lines had enhanced resistance to Xoo, and knocking out OsSGT1 in plants overexpressing OsTGAL1 blocked the susceptibility caused by OsTGAL1
    • Thus, our results demonstrate that OsTGAL1 negatively regulates resistance to Xoo by its effects on SA metabolism via the activation of OsSGT1, which provides valuable targets for plant breeders in developing new cultivars that are resistant to Xoo
    • Overexpression of OsTGAL1 increased the susceptibility of rice to Xoo
    • The transcript of OsSGT1 was induced by Xoo and this responsive expression was further increased in plants overexpressing OsTGAL1
    • Plants overexpressing OsTGAL1 could affect the expression of many SA signaling-related genes
    • OsTGAL1 was able to interact with the promoter of OsSGT1, which encodes a key enzyme for SA metabolism
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