Integrated Analysis of Grapevine Responses to Winter Pruning Reveals Temperature-Associated, Polyphenol-Rich Xylem Occlusions.
Winter xylem vessel occlusions in grapevines are strongly linked to air temperature and are rich in polyphenols like stilbenoids and flavonoids.
- Why it matters: Understanding how grapevines respond to pruning is crucial for managing pathogen risks and tissue dehydration, especially under varying environmental conditions.
- What they did: The study combined histological, metabolomic, transcriptomic, and spectroscopic analyses on Vitis vinifera to examine vessel occlusion formation, gene expression, and polyphenol accumulation at different times and depths.
- The result: Findings reveal temperature-dependent formation of gel- or gum-like occlusions enriched in stilbenoids, with polyphenol accumulation linked to up-regulation of stilbene synthase genes, informing crop management strategies.