StPOPA, encoding an anionic peroxidase, enhances potato resistance against Phytophthora infestans
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Late blight, caused by Phytophthora infestans, is the most devastating potato disease worldwide and results in catastrophic production losses. Reactive oxygen species (ROS) are signal molecules utilized at the early stage of plant immunity. Specifically, anionic peroxidases are reported to be involved in many plants’ defense systems. However, there is limited information about the function of anionic peroxidase genes in potato immunity. Here, we report that StPOPA, a gene encoding a suberization-associated anionic peroxidase, was induced by P. infestans infection, mechanical damage, as well as jasmonic acid and ethylene treatments. Overexpression of StPOPA gene in potato enhanced potato resistance against P. infestans by promoting the accumulation of callose in the cell wall and ROS in the cytoplasm, and then the callose and ROS restricted the infection and spreading of the disease possibly by purposeful programmed cell death. Our results suggest that StPOPA plays a positive role in potato resistance to immunochallenge, and this gene could be used for the genetic improvement of resistance against potato late blight.
KeywordsPotato Anionic peroxidase Late blight disease Phytophthora infestans
This research was supported by grants from the National Natural Science Foundation of China (31261140362).
Compliance with ethical standards
The authors declare no competing interests.
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