期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ijms23031292
关键词
PR-1; blister blight; Camellia sinensis; defense mechanism
资金
- special fund for University-Supported Extension Model [XTG2021-04]
- China Agriculture Research System of MOF [CARS-19]
- China Agriculture Research System of MARA [CARS-19]
- Natural Science Foundation of Shaanxi Province [2021JQ-135]
PR-1 proteins play an important role in the defense of plants against diseases. In this study, 17 CsPR-1 genes were identified from the tea plant genome and classified into different groups based on their characteristics. Most of the CsPR-1 proteins contain a signal peptide and a conserved PR-1 domain. These genes are closely related to the defense mechanism of the tea plant and are significantly upregulated under tea blister-blight stress.
Pathogenesis-related 1 (PR-1) proteins, which are defense proteins in plant-pathogen interactions, play an important role in the resistance and defense of plants against diseases. Blister blight disease is caused by Exobasidium vexans Massee and a major leaf disease of tea plants (Camellia sinensis (L.) O. Kuntze). However, the systematic characterization and analysis of the PR-1 gene family in tea plants is still lacking, and the defense mechanism of this family remains unknown. In this study, 17 CsPR-1 genes were identified from the tea plant genome and classified into five groups based on their signal peptide, isoelectric point, and C-terminus extension. Most of the CsPR-1 proteins contained an N-terminal signal peptide and a conserved PR-1 like domain. CsPR-1 genes comprised multiple cis-acting elements and were closely related to the signal-transduction pathways involving TCA, NPR1, EDS16, BGL2, PR4, and HCHIB. These characteristics imply an important role of the genes in the defense of the tea plant. In addition, the RNA-seq data and real-time PCR analysis demonstrated that the CsPR-1-2, -4, -6, -7, -8, -9, -10, -14, -15, and -17 genes were significantly upregulated under tea blister-blight stress. This study could help to increase understanding of CsPR-1 genes and their defense mechanism in response to tea blister blight.
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