数字农科院2.0

Exogenous Sugar Alcohols Enhance Peach Seedling Growth via Modulation of Rhizosphere Bacterial Communities

文献类型： 外文期刊

作者： Huili Yu;Jiaqi Li;Wei Shao;Huimin Liu;Ruiquan Dong;Guoyi Xu;Peng Si

作者机构：

关键词： bacterial community;mannitol;peach seeding;rhizosphere;sorbitol

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2025 年 15 卷 7 期

页码：

收录情况： SCIE（2025版）

摘要： Excessive fertilizer input and low output are currently problems for peach production in China. Sugar alcohols such as sorbitol and mannitol represent promising eco-friendly fertilization strategies to improve fruit quality and optimize nutrient management. Our research explored the effect of sorbitol and mannitol on the rhizosphere environment and peach growth from the rhizosphere micro-ecology perspective. Potted peach seedlings were used as materials. Without adding or adding different sorbitol and mannitol concentration gradients (100, 200, 400) combined with potassium dihydrogen phosphate (KH2PO4), the physicochemical properties of rhizosphere soil, leaf nutrition, photosynthetic and growth index were determined, and the rhizosphere bacterial community was analyzed via Illumina Miseq high-throughput sequencing. Both sorbitol and mannitol altered the rhizosphere environment, effectively improved leaf photosynthesis, and promoted peach seedling growth; particularly, M100 had optimal affection. Sorbitol and mannitol altered the bacterial structure and reduced bacterial diversity, which observably correlated with soil organic matter and available potassium. For the rhizosphere bacterial composition, sorbitol and mannitol increased specific bacterial OTUs and induced changes in bacterial composition, among which chemoheterotrophic and nitrogen-transforming bacteria increased with the addition of sorbitol and mannitol. Association network analysis and a structural equation model showed that S100 and M100 mainly enriched Vicinamibacteraceae to regulate peach seedling growth. Overall, low-concentration sorbitol and mannitol showed the best effect in peach seedling growth through regulating the rhizosphere environment.

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