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Xianyu Deng

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Open access Aug 2026

Field Evidence: Microbial Fertilizer Drives Rhizosphere Phosphorus Transformation and Acidity Regulation to Synergistically Promote Chlorogenic Acid Accumulation in Lonicera macranthoides

Microbial fertilizers may improve phosphorus availability and pH in acidic soils, but field evidence linking these changes with medicinal plant biomass and specialised metabolite accumulation remains limited. Here, a one-season field experiment was conducted in acidic yellow soil in Guizhou Province, China, using four fertilization regimes for Lonicera macranthoides: an organic fertilizer plus compound fertilizer control (CK), a bacterial consortium (T1), a simplified bacterial combination (T2), and a fungal agent (T3). Soil chemical properties, soil aggregate composition, flower-bud biomass, and chlorogenic-acid-related compounds were measured. T1 and T3 increased soil available phosphorus and pH at the pre-flowering stage and increased the proportion of water-stable macroaggregates (>5 mm). Both treatments also increased fresh and dry biomass. T1 showed the highest numerical chlorogenic acid content, whereas T3 was more favourable for the accumulation of isochlorogenic acids A and C. Across plot-level observations, available phosphorus was positively correlated with fresh weight (r = 0.804) and dry weight (r = 0.781), and pH was positively correlated with chlorogenic acid (r = 0.687). Univariate regression and redundancy analysis further indicated that available phosphorus and pH were the soil factors most closely associated with biomass and chlorogenic acid accumulation. These findings provide preliminary field indications that microbial fertilizers may improve yield and medicinal quality in acidic-soil L. macranthoides production. However, the single-season, single-site nature of the experiment warrants cautious interpretation and further validation across broader conditions. The observed associations are consistent with, but do not prove, a mechanistic pathway involving microbe-mediated phosphorus transformation and acidity regulation.

Yong Wang, Kuaifen Li, Hua-Rong Qiu et al. · Microorganisms · 0 citations

Open access Jul 2026

Temperature regulation mechanisms of diapause in Coridius chinensis revealed by multi-omics integration: coordinated responses of Brain-Gut-Fat Body

Diapause in Coridius chinensis is a complex survival strategy that enables them to survive under prolonged cold stress. To elucidate the mechanisms of temperature regulation during diapause, we conducted multi-omics analyses, including gut metagenomics, brain transcriptomics, and fat body metabolomics, under both normal (25 °C) and diapause conditions (4 °C). Gut microbiome analysis revealed an extreme polarization during diapause, dominated by the endosymbionts Pantoea endophytica (52%) and Rickettsia bellii (47.4%), while functional microbiota such as Pantoea and Dietzia were significantly reduced. This shift suggests a trade-off where microbial metabolic diversity is sacrificed in favor of intracellular symbionts that may regulate host mitochondrial activity and suppress energy consumption. Brain transcriptomic analysis indicated a downregulation of neural signaling pathways related to feeding suppression, stress resistance, and circadian rhythm regulation. Fat body metabolomics identified the coordinated activation of 13 core pathways that link energy storage with stress adaptation, with dynamic changes ranging from rapid stress responses (0–300 AU) to energy storage dominance (300–500 AU), and finally to a state of homeostasis (>500 AU). Notably, dysregulated choline metabolism was significantly correlated with necrotic features (r = 0.78, p < 0.001), while catecholamine biosynthesis derived from tyrosine emerged as a corrective pathway, revealing the mechanistic link between metabolic flexibility and survival. Adults primarily utilize plants within the Cucurbitaceae, Fabaceae, and Solanaceae families as hosts, underpinned by long-standing folk traditions in specific localities regarding their dietary consumption or therapeutic application.

Yantao Pang, Yajuan Chen, Qi Huang et al. · Frontiers in Microbiology · 0 citations