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Brassinosteroid Regulates 3-Hydroxy-3-methylglutaryl CoA Reductase to Promote Grape Fruit Development
Ting Zheng1, Tianyu Dong1, Muhammad S Haider1
1College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.
Journal of Agricultural and Food Chemistry
|October 16, 2020
Summary
Brassinosteroids (BRs) enhance grape quality by increasing sugar and anthocyanin content, improving color, and boosting aroma. They achieve this by regulating key genes like VvHMGR, influencing fruit development.
Area of Science:
- Plant Physiology
- Agricultural Science
- Biochemistry
Background:
- Brassinosteroids (BRs) are crucial plant hormones regulating growth and development.
- The specific role of BRs in grape berry development remains largely uncharacterized.
Purpose of the Study:
- To investigate the effects of brassinosteroids on grape berry development.
- To elucidate the molecular mechanisms underlying BR-mediated regulation of grape quality traits.
Main Methods:
- Grape berries were treated with brassinosteroids at different developmental stages.
- Analysis of fruit sugar, organic acid, anthocyanin, and terpenoid aroma component content.
- Gene expression analysis of VvHMGR and hormone profiling.
Main Results:
- BR treatment increased fruit sugar and anthocyanin accumulation, promoting berry coloration.
- BRs accelerated the biosynthesis of key terpenoid aroma compounds.
- BRs negatively regulated VvHMGR expression, impacting the mevalonate pathway and hormone levels.
Conclusions:
- Brassinosteroids play a significant role in enhancing grape berry quality, including color and aroma.
- BRs appear to regulate these traits by modulating VvHMGR gene expression and downstream metabolic pathways.
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