The SmDDA1b regulatory module enhances plant resistance to BW. (IMAGE)
Caption
The SmDDA1b regulatory module enhances plant resistance to BW. For disease resistance plants, during Ralstonia solanacearum stress, the SmDDA1b proteins were induced by R. solanacearum. SmNAC were recognized by SmDDA1b and then degraded by the SmDDA1b-mediated ubiquitin/26S proteasome system (UPS). Consequently, the feedback regulatory of SmNAC on SmDDA1b were a failure and the suppression of SmNAC on ICS1 was also relieved, SA is accumulated and the SA signaling genes are activated, thus system-acquired resistance (SAR) is induced in plants. For susceptible plants, during R. solanacearum stress, SmDDA1b proteins were restrained, SmNAC cannot be recognized and degraded by ubiquitin/26S proteasome system (UPS). The released SmNAC proteins inhibits the expression of SmDDA1b in return and the suppression of SmNAC on SmICS1 was enhanced, SA and SA signaling pathway was repressed.
Credit
Horticulture Research
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