Recently, the research innovation team of crop pest function genome research of the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences reported that the plant ribonuclease RNase P protein subunit OsRpp30 encodes the resistance function of rice to bacterial diseases and fungal diseases, revealing a new plant broad-spectrum disease resistance molecular mechanism, the study also reported for the first time that the plant ribonuclease RNase P protein subunit has immune resistance regulation, It provides new ideas and new genes for crop broad-spectrum disease resistance breeding. The research was published in the Plant Biotechnology Journal.
According to researcher Liu Wende, rice blast and white leaf blight are major diseases of rice, causing serious yield losses all year round, and identifying and using disease resistance genes is the most economical, effective and environmentally friendly strategy for preventing and controlling rice blast and white leaf blight in production. The team's previous research found that the plant-specific HD2-type deacetylatase HDT701 negatively regulates the immune defense response of rice, but its mechanism of action is not clear.
The study found that HDT701 inhibits the acetylation modification of the RNase P protein subunit OsRpp30, thereby affecting the latter's disease resistance function of rice to rice blast and white leaf blight. Further studies have found that the last 7 amino acids at the C-terminus of the OsRpp30 gene are the necessary sequences for its interaction with HDT701 and regulation of rice disease resistance, and are highly conserved in the homologous proteins of many grass crops, indicating that the disease resistance function of this gene is selected and retained during the long-term co-evolution of plants and pathogenic bacteria. The research has been funded by the National Natural Science Foundation of China and the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences.
Photo caption: OsRpp30 regulates the HDT701-mediated immune response
Source: Guangming Network