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Acidification associated with plant phosphorus-acquisition strategies decreases nutrient cycling potential of rhizosphere bacteria along the Hailuogou post-glacial chronosequence.

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Title: Acidification associated with plant phosphorus-acquisition strategies decreases nutrient cycling potential of rhizosphere bacteria along the Hailuogou post-glacial chronosequence.
Authors: Li, Xiao-Long1 (AUTHOR), Sun, Hongyang2 (AUTHOR), Zhou, Jun1 (AUTHOR) zhoujun@imde.ac.cn, Chen, Yang1 (AUTHOR), Du, Hong-Qiu1,3 (AUTHOR), Ming, Yue-Xin1,3 (AUTHOR), Wu, Shuang1,3 (AUTHOR), Lambers, Hans4 (AUTHOR)
Source: Plant & Soil. Aug2026, Vol. 525 Issue 1, p145-161. 17p.
Subjects: Soil acidity, Nutrient cycles, Plant root morphology, Ecological succession, Rhizobacteria, Soil chronosequences, Plant-microbe relationships
Geographic Terms: China
Abstract: Background and aim: Soil nutrient availability, acidification associated with plant phosphorus-mining strategies, and fine root foraging all influence nutrient cycling. However, their relative impacts on microbial nutrient cycling during primary succession remain unclear. Methods: We studied a 130-year primary succession along the Hailuogou post-glacial chronosequence in southwest China. Early-successional stages (1–3) are dominated by Hippophae tibetana, which is gradually replaced by Populus purdomii. In the climax community (stage 4), Abies fabri replaces P. purdomii. We collected rhizosphere soil, roots, and leaves from the dominant species, analyzing how phosphorus-acquisition strategies (proxied by soil pH, leaf manganese concentration and fine-root morphology) influenced bacterial nutrient-cycling gene abundance, based on 16S rRNA sequencing. Results: Rhizosphere pH and the abundance of genes encoding enzymes involved in ammonium and nitrate assimilation, denitrification and phosphorus mobilization were significantly lower for H. tibetana and A. fabri than for P. purdomii. In contrast, P. purdomii exhibited a significantly higher specific root length. Linear mixed models reveal that leaf manganese concentration was positively correlated with soil acidification. Multiple regression models show that nutrient-cycling potential was more significantly linked to soil pH than to fine-root morphology or soil nutrient availability. Structural equation models indicate that the reduced nutrient-cycling potential was indirectly associated with soil acidification through bacterial co-occurrence networks rather than bacterial richness. Conclusion: Soil acidification, associated with phosphorus-mining strategies of H. tibetana and A. fabri, may inhibit microbial nutrient-cycling potential during primary succession. This highlights the interactions between plant nutrient-acquisition strategies and microbial processes in shaping terrestrial nutrient cycling. [ABSTRACT FROM AUTHOR]
Copyright of Plant & Soil is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Acidification associated with plant phosphorus-acquisition strategies decreases nutrient cycling potential of rhizosphere bacteria along the Hailuogou post-glacial chronosequence.
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  Data: Background and aim: Soil nutrient availability, acidification associated with plant phosphorus-mining strategies, and fine root foraging all influence nutrient cycling. However, their relative impacts on microbial nutrient cycling during primary succession remain unclear. Methods: We studied a 130-year primary succession along the Hailuogou post-glacial chronosequence in southwest China. Early-successional stages (1–3) are dominated by Hippophae tibetana, which is gradually replaced by Populus purdomii. In the climax community (stage 4), Abies fabri replaces P. purdomii. We collected rhizosphere soil, roots, and leaves from the dominant species, analyzing how phosphorus-acquisition strategies (proxied by soil pH, leaf manganese concentration and fine-root morphology) influenced bacterial nutrient-cycling gene abundance, based on 16S rRNA sequencing. Results: Rhizosphere pH and the abundance of genes encoding enzymes involved in ammonium and nitrate assimilation, denitrification and phosphorus mobilization were significantly lower for H. tibetana and A. fabri than for P. purdomii. In contrast, P. purdomii exhibited a significantly higher specific root length. Linear mixed models reveal that leaf manganese concentration was positively correlated with soil acidification. Multiple regression models show that nutrient-cycling potential was more significantly linked to soil pH than to fine-root morphology or soil nutrient availability. Structural equation models indicate that the reduced nutrient-cycling potential was indirectly associated with soil acidification through bacterial co-occurrence networks rather than bacterial richness. Conclusion: Soil acidification, associated with phosphorus-mining strategies of H. tibetana and A. fabri, may inhibit microbial nutrient-cycling potential during primary succession. This highlights the interactions between plant nutrient-acquisition strategies and microbial processes in shaping terrestrial nutrient cycling. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Plant & Soil is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11104-025-07445-z
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        Text: English
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      – SubjectFull: Soil acidity
        Type: general
      – SubjectFull: Nutrient cycles
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      – SubjectFull: Plant root morphology
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      – SubjectFull: Rhizobacteria
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      – SubjectFull: Plant-microbe relationships
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      – SubjectFull: China
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      – TitleFull: Acidification associated with plant phosphorus-acquisition strategies decreases nutrient cycling potential of rhizosphere bacteria along the Hailuogou post-glacial chronosequence.
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              Text: Aug2026
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