Journal
ANTIOXIDANTS
Volume 11, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/antiox11101901
Keywords
Solanum tuberosum L; StMSD; interference expression; wound healing; H2O2; phenylpropanoid metabolism
Funding
- National Natural Science Foundation [32160592, 31772040]
- China Agriculture Potato Research System of MOF and MARA [CARS-09-P10]
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The interference expression of StMSD can result in less suberin polyphenolic and lignin deposition in potato tubers by inhibiting the disproportionation of O-2(center dot)- to H2O2 and restraining phenylpropanoid metabolism.
Superoxide dismutase (SOD) actively participates in the wound stress of plants. However, whether StMSD mediates the generation of H2O2 and the deposition of suberin polyphenolic and lignin at potato tuber wounds is elusive. In this study, we developed the StMSD interference expression of potato plants and tubers by Agrobacterium tumefaciens-mediated transformation. The StSOD expression showed a marked downregulation in StMSD-interference tubers, especially StCSD2 and StCSD3. The content of O-2(center dot)- exhibited a noticeable increase together with the inhibition in H2O2 accumulation. Moreover, the gene expression levels of StPAL (phenylalanine ammonia-lyase) and StC4H (cinnamate-4-hydroxylase) were downregulated in StMSD-interference tubers, and less suberin polyphenolic and lignin depositions at the wounds were observed. Taken together, the interference expression of StMSD can result in less suberin polyphenolic and lignin deposition by inhibiting the disproportionation of O-2(center dot-) to H2O2 and restraining phenylpropanoid metabolism in tubers.
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