Copper ions suppress abscisic acid biosynthesis to enhance defence against Phytophthora infestans in potato.

ABSTRACT: Copper-based antimicrobial compounds are widely and historically used to control plant diseases, such as late blight caused by Phytophthora infestans, which seriously affects the yield and quality of potato. We previously identified that copper ion (Cu²⁺ ) acts as an extremely sensitive elicitor to induce ethylene (ET)-dependent immunity in Arabidopsis. Here, we found that Cu²⁺ induces the defence response to P. infestans in potato. Cu²⁺ suppresses the transcription of the abscisic acid (ABA) biosynthetic genes StABA1 and StNCED1, resulting in decreased ABA content. Treatment with ABA or inhibitor fluridone made potato more susceptible or resistance to late blight, respectively. In addition, potato with knockdown of StABA1 or StNCED1 showed greater resistan

SUBMITTER: Liu HF 

PROVIDER: S-EPMC7170774 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature