蓝莓植物的根际微生物在明显的酸性土壤条件下与寄主长期共存,通过相互共生的相互作用对主人的表现产生深远的影响。同时,植物可以通过发挥寄主效应来调节根际微生物,以满足植物生长发育的功能需求。然而,目前尚不清楚蓝莓植物的发育阶段如何影响结构,函数,和根际微生物群落的相互作用。这里,我们检查了三个发育阶段的细菌群落和根代谢物(花和叶芽发育阶段,果实生长发育阶段,和果实成熟期)的蓝莓植物。结果表明,在所有三个发育阶段,Shannon和Chao1指数以及群落组成都存在显着差异。从第1阶段到第2阶段,放线菌的相对丰度显着增加了10%(p<0.05),而变形菌的相对丰度显着降低。共生网络分析揭示了一个相对复杂的网络,在第二阶段有1179条边和365个节点。在第2阶段,生态位宽度最高,而随着植物的发育,生态位重叠趋于增加。此外,非靶向代谢组分析显示,维生素的差异代谢产物的数量,核酸,类固醇,在第1阶段至第2阶段以及第2阶段至第3阶段之间,脂质增加,而碳水化合物和肽的差异代谢产物的脂质减少。levan表达水平的显著变化,L-谷氨酸,吲哚丙烯酸,油苷11-甲酯,苏-丁香酰甘油,姜糖脂B,和维生素酸与细菌群落结构高度相关。总的来说,我们的研究表明,优势细菌分类群的显着变化与根代谢物的动力学密切相关。这些发现为开发益生元产品奠定了基础,以增强根微生物的有益作用,并通过可持续的方法提高蓝莓的生产力。
The rhizosphere microorganisms of
blueberry plants have long coexisted with their hosts under distinctively acidic soil conditions, exerting a profound influence on host performance through mutualistic symbiotic interactions. Meanwhile, plants can regulate rhizosphere microorganisms by exerting host effects to meet the functional requirements of plant growth and development. However, it remains unknown how the developmental stages of
blueberry plants affect the structure, function, and interactions of the rhizosphere microbial communities. Here, we examined bacterial communities and root metabolites at three developmental stages (flower and leaf bud development stage, fruit growth and development stage, and fruit maturation stage) of
blueberry plants. The results revealed that the Shannon and Chao 1 indices as well as community composition varied significantly across all three developmental stages. The relative abundance of Actinobacteria significantly increased by 10 % (p < 0.05) from stage 1 to stage 2, whereas that of Proteobacteria decreased significantly. The co-occurrence network analysis revealed a relatively complex network with 1179 edges and 365 nodes in the stage 2. Niche breadth was highest at stage 2, while niche overlap tended to increase as the plant developed. Furthermore, the untargeted metabolome analysis revealed that the number of differential metabolites of vitamins, nucleic acids, steroids, and lipids increased between stage 1 to stage2 and stage 2 to stage 3, while those for differential metabolites of carbohydrates and peptides decreased. Significant changes in expression levels of levan, L-glutamic acid, indoleacrylic acid, oleoside 11-methyl ester, threo-syringoylglycerol, gingerglycolipid B, and bovinic acid were highly correlated with the bacterial community structure. Collectively, our study reveals that significant alterations in dominant bacterial taxa are strongly correlated with the dynamics of root metabolites. These findings lay the groundwork for developing prebiotic products to enhance the beneficial effects of root microorganisms and boosting
blueberry productivity via a sustainable approach.