Fig. 6: Schematic presentation of the mechanism that enables root-derived flavonoids to promote vitamin accumulation in tomato fruits.
From: Flavonoid-mediated bacterial spermidine biosynthesis enhances vitamin accumulation in tomato fruits
1 Plant roots release flavonoid signals into the rhizosphere, where they interact with soil microbes. 2 Flavonoids recruit Lysobacter to the rhizosphere by enhancing bacterial twitching motility, which reshapes the rhizosphere microbiome. 3 Lysobacter responds to flavonoids in a RpoN-dependent manner and produces more spermidine. 4 Spermidine up-regulates fruit vitamin metabolism through the L-galactose pathway and thereby boosts the accumulation of vitamins B6 and C in fruits. Created in BioRender. fu, w. (https://BioRender.com/7k06qpx).
