Isolation and functional identification of a Botrytis cinerea-responsive caffeoyl-CoA O-methyltransferase gene from Lilium regale wilson.

Plant Physiology and Biochemistry : PPB
Yongyao FuLiping Yang

Abstract

In plants, genes involved in the Phenylpropanoid/monolignol pathway play important roles in lignin biosynthesis and plant immunity. However, their biological function in Lilium remains poorly characterized. Comparative RNA sequencing of the expression profiles of the monolignol pathway genes from fungi-resistant species Lilium regale after inoculation with Botrytis cinerea was performed. One upregulated caffeoyl-CoA O-methyltransferase gene, LrCCoAOMT, was cloned for functional characterization by reverse genetic methods. LrCCoAOMT encodes a putative protein of 246 amino acids and is highly expressed in stem tissues and responsive to salicylic acid (SA) signaling and B. cinerea infection. LrCCoAOMT was largely directed to the cytoplasm. LrCCoAOMT overexpression in Arabidopsis resulted in an increased lignin deposition in vascular tissues and conferred resistance to B. cinerea infection in transgenic plants. Transient transformation of LrCCoAOMT in nonresistant Lilium sargentiae leaves also identified the defense function to B. cinerea. In addition, transcript levels of genes involved in the monolignol and SA-dependent signaling pathways were altered in transgenic Arabidopsis, suggesting that LrCCoAOMT might play vital roles in ...Continue Reading

References

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Aug 28, 2019·International Journal of Molecular Sciences·Yongyao FuKeming Luo

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