Spraying phenolic acid-modifiedchitooligosaccharide derivatives improves anthocyanin accumulation in grape.

ABSTRACT: Herein, four chitooligosaccharide derivatives (COS-RA, COS-FA, COS-VA, COS-GA) were prepared by laccase-catalyzed chitooligosaccharide modification with rosmarinic acid (RA), ferulic acid (FA), gallic acid (GA), and vanillic acid (VA), and structures were characterized. RA and FA resulted in higher amino-substitution in the chitooligosaccharides than GA and VA. COS-RA and COS-FA had greater DPPH scavenging rates than COS-GA and COS-VA. Compared with COS treatment, spraying 250 mg L^-1 COS-RA or COS-VA 6 times (once per 7 days) increased soluble sugar and anthocyanin content by 18.6%-23.2% and 41.7%-46.7%, respectively, from the fruit expansion to harvest stage. COS-RA and COS-VA also enhanced gene expression related to anthocyanin synthesis (PAL, F3H, F3'5'H, DFR, and U

SUBMITTER: Duan S 

PROVIDER: S-EPMC10534123 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature