'140R' Rootstock Regulates Resveratrol Content in 'Cabernet Sauvignon' Grapevine Leaves Through MiRNA

Overview

Journal Plants (Basel)

Date 2024 Nov 9

PMID 39519974

Authors

Chunmei Zhu

Zhijun Zhang

Zhiyu Liu

Wenchao Shi

Dongliang Zhang

Baolong Zhao

Junli Sun

Affiliations

Soon will be listed here.

Abstract

Grafting is important for increasing the resistance of grapevines to environmental stress, improving fruit quality, and shortening the reproductive period. In this study, 'Cabernet Sauvignon' (CS) grafted on the resistant rootstock 140R (CS/140R), self-grafted grapevines of the resistant rootstock 140R (140R/140R), and self-grafted grapevines of CS (CS/CS) were subjected to high-throughput sequencing; small RNA (sRNA) libraries were constructed, and miRNAs responsive to the grafting process were identified. A total of 177 known miRNAs and 267 novel miRNAs were identified. Many miRNAs responsive to the grafting process were significantly down-regulated in CS/140R leaves relative to CS/CS leaves, such as vvi-miR171c, vvi-miR171e, et al., suggesting that the expression of these miRNAs might be affected by grafting. Kyoto Encyclopedia of Genes and Genomes analysis revealed that the differentially expressed miRNAs regulated the expression of genes in the phenylpropanoid synthesis pathway. Grapevine leaves transiently overexpressing vvi-miR171c were assayed, and the expression of the target gene, , and the resveratrol content were decreased, indicating that vvi-miR171c negatively regulates the expression of . In sum, 140R increased the resveratrol content of the scion by grafting, down-regulating the expression of vvi-miR171c. These results provide new information that will aid future analyses of the effects of grafting on the content of secondary metabolites.

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