The sucrose transporter MdSUT4.1 participates in the regulation of fruit sugar accumulation in apple.

ABSTRACT:

Background

Sugar content is an important determinant of fruit sweetness, but details on the complex molecular mechanism underlying fruit sugar accumulation remain scarce. Here, we report the role of sucrose transporter (SUT) family in regulating fruit sugar accumulation in apple.

Results

Gene-tagged markers were developed to conduct candidate gene-based association study, and an SUT4 member MdSUT4.1 was found to be significantly associated with fruit sugar accumulation. MdSUT4.1 encodes a tonoplast localized protein and its expression level had a negative correlation with fruit sugar content. Overexpression of MdSUT4.1 in strawberry and apple callus had an overall negative impact on sugar accumulation, suggesting that it functions to remobilize sugar out of the vacuole. In a

SUBMITTER: Peng Q 

PROVIDER: S-EPMC7203859 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature