Rhizobacterial compositions and their relationships with soil properties and medicinal bioactive ingredients in Cinnamomum migao

Abstract

IntroductionRhizobacterial communities and their metabolites can affect plant growth, development, and stress resistance, as well as the biosynthesis and accumulation of bioactive compounds in medicinal plants. This relationship has been well-characterized in many medicinal herbs, although much less commonly in medicinal trees.MethodsHere, we analyzed the composition and structure of Cinnamomum migao rhizobacterial communities across nine growing regions in Yunnan, Guizhou and Guangxi, China, as well as differences in soil properties and fruit bioactive compounds.ResultsResults showed that the C. migao rhizobacterial communities exhibited high species richness, but location-specific differences in structure. Site-specific differences in soil properties and bioactive compounds were also observed. Furthermore, rhizobacterial community compositions were correlated with both soil properties and fruit bioactive compounds, metabolism-related functions were most common in C. migao rhizobacteria.DiscussionSeveral bacterial genera, including Acidothermus, Acidibacter, Bryobacter, Candidatus_Solibacter, and Acidimicrobiales, potentially promote the biosynthesis and accumulation of 1,8-cineole, cypressene, limonene, and α-terpineol, Nitrospira and Alphaproteobacteria may play an inhibitory role. Finally, our results emphasized the critical role that soil pH and nitrogen levels play in driving rhizobacterial community structure, and specific functional bacteria can also counteract with soil properties, Acidibacter and Nitrospira can affect soil pH and nitrogen effectiveness. Overall, this study provides additional insight into the complex correlation of rhizosphere microorganisms with bioactive ingredients and soil properties of medicinal plants.

Morchella esculenta cultivation in fallow paddy fields and drylands affects the diversity of soil bacteria and soil chemical properties

“…In DT soils ( Figure 4E ), Bryobacter (relative abundance of 1.98% and 2.85% in the DT-CK and DT-YDJ treatments, respectively; p = 0.04), Anaeromyxobacter (1.85% and 2.89% in the DT-CK and DT-YDJ treatments, respectively; p = 0.01) , Candidatus_Solibacter (1.20% and 1.82% in the DT-CK and DT-YDJ treatments, respectively; p = 0.01) , Ellin6067 (0.70% and 0.92% in the DT-CK and DT-YDJ treatments, respectively; p = 0.01), and Bacillus (0.15% and 0.56% in the DT-CK and DT-YDJ treatments, respectively; p = 0.001) were the five most differentially abundant genera; in HD soils ( Figure 4F ), Acidibacter (relative abundance of 0.64% and 0.30% in the HD-CK and HD-YDJ treatments, respectively; p = 0.04), Blastococcus (0.16% and 0.37% in the HD-CK and HD-YDJ treatments, respectively; p = 0.01) , and Mesorhizobium (0.10% and 0.27% in the HD-CK and HD-YDJ treatments, respectively; p = 0.04) were the three most differentially abundant genera. In which, a study has shown that Bryobacter and Candidatus_Solibacter in rhizosphere soil has the potential to regulate Cinnamomum migao metabolism ( Li et al, 2023 ); Ellin6067 as a kind of nitrosifying bacteria, which may participate in the soil nitrogen cycling process ( Lv et al, 2022 ); Bacillus is a well-known plant growth-promoting bacterium ( Sheng, 2005 ; Ali et al, 2021 ). Blastococcus with potential capacity improve the soil nutrient supply ( Li et al, 2022 ); Mesorhizobium be found with capacity of improves chickpea growth under chromium stress and alleviates chromium contamination of soil ( Naz et al, 2023 ).…”

Quality analysis and function prediction of soil microbial communities of Polygonatum cyrtonema in two indigenous-origins

“…Exophiala and Clonostachys contribute to the decrease in PCH polysaccharides content, while Enterobacter may participate in the synthesis of PCH polysaccharides, thereby increasing their content. Previous studies have shown that Fusarium significantly increases the content of polysaccharides and other metabolites (Li et al, 2023). Acidibacter can promote the synthesis and accumulation of terpenoid compounds and also has a certain impact on polysaccharide compounds (Ren et al, 2023).…”

Preliminary Investigation of Astragalus arpilobus subsp. hauarensis: LC-MS/MS Chemical Profiling, In Vitro Evaluation of Antioxidant, Anti-Inflammatory Properties, Cytotoxicity, and In Silico Analysis against COX-2

“…Finally, the geographical locations where the plant materials were collected can play a crucial role, as distinct regions may have unique microclimates and soil compositions, influencing the overall chemical profile of the plants [ 41 ]. Therefore, the divergence in compound composition between studies underscores the complexity of plant chemistry and highlights the importance of considering multiple factors when comparing phytochemical profiles across different studies.…”