数字农科院2.0

Soil bacterial responses to experimental warming and drought across winter wheat growth stages in the North China Plain

文献类型： 外文期刊

作者： Djifa Fidele Kpalari;Yuanyuan Fu;Sen Li;Hui Cao;Rakhwe Kama;Abdoul Kader Mounkaila Hamani;Junming Liu;Shoutian Ma;Dongxue Lv;Yang Gao

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关键词： drought;rhizosphere bacterial community;root exudates;warming;wheat growth stage

期刊名称： Frontiers in Plant Science

ISSN：

年卷期： 2025 年 16 卷

页码：

收录情况： SCIE（2025版）

摘要： Introduction: While climate change alters the balance of the terrestrial ecosystems, the impact on the soil bacterial community remains poorly understood. A field experiment was conducted to assess the effects of warming, drought, and their combination on the soil bacterial community at different growth stages of winter wheat. Methods: Four treatments were defined for this study: warming at 1.5°C combined with full irrigation (TWS) and deficit irrigation (TWD), then ambient temperature combined with full irrigation (TNS) and deficit irrigation (TND). Results: TWS, unlike TND, promoted nitrogen availability for plants and root exudation. The abundance and diversity of the bacterial community were more responsive to different climatic stresses at the jointing stage than at other growth stages. Chloroflexi, Firmicutes, and Bacteroidota were positively correlated with soil inorganic nitrogen, the root total organic carbon (TOC), and negatively correlated with available phosphorus (AP), available potassium (AK), soil organic carbon (SOC) under TND, while an opposite trend was observed with Actinobacteria and Proteobacteria. Furthermore, under TWS, Bacteroidota, unlike Actinobacteria, was positively correlated with NH4+, NO3-, TOC, and negatively correlated with AP, and SOC. The bacterial community network feature values were higher under TWD and lower under TNS. Conclusion: These results indicate that the sensitivity of the rhizosphere bacterial community to the different climatic stresses varies according to the growth stage, and that the community is particularly more responsive at the jointing stage than at the later stages.

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