Rhizosphere effects of woody plants on soil biogeochemical processes: A meta-analysis

Gan, Dayong; Feng, Jiguang; Han, Mengguang; Zeng, Hui; Zhu, Biao

doi:10.1016/j.soilbio.2021.108310

Cited by 49 publications

(19 citation statements)

References 113 publications

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“…Our results are in line with previous studies, which commonly reported positive REs [5,12]. Recently, a meta-analysis also reported that the average REs on C min and net N min of woody plants were 38% and 40%, respectively [10]. Given that the REs are likely regulated by many factors such as tree species, mycorrhizal types, and sites, the magnitudes of RE may vary greatly among individual studies [12,14,20].…”

Section: The Magnitude and Direction Of Relative Rhizosphere Effects ...supporting

confidence: 91%

“…It is increasingly being recognized that REs govern biogeochemical cycling of many elements in terrestrial ecosystems [6,7]. Recently, meta-analysis studies showed that the mean magnitude of REs on soil C and nitrogen (N) mineralization rates ranged from 22% to 82% [8][9][10]. However, our understanding of RE is still insufficient, which limits our ability to incorporate the RE into terrestrial C and N models.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies examined the RE of mature trees in the field [10]. Sampling paired rhizosphere soil (adhering soil to the fine roots) and bulk soil is a practical method to explore the in situ REs of forests [5,11].…”

Section: Introductionmentioning

confidence: 99%

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Rhizosphere Effects along an Altitudinal Gradient of the Changbai Mountain, China

Huo

Yin

et al. 2022

Forests

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Rhizosphere effects (REs) play important roles in regulating carbon (C) and nutrient cycling in terrestrial ecosystems. However, little is known about the REs of mature trees in the field, especially at the ecosystem scale. This study aimed to explore the variation and patterns of REs in natural ecosystems. Here, combining soil monoliths with an adhering soil (shaking fine roots) method was adopted to sample paired rhizosphere soil and bulk soil along an altitudinal gradient. Based on the relative REs and the percentage of rhizosphere soil mass, the REs on soil C and net nitrogen mineralization rates (Cmin and net Nmin) at the ecosystem scale were estimated. Our results showed that the REs on soil processes, soil microbial biomass C and extracellular enzyme activities (β-glucosidase and N-acetyl-glucosaminidase activities), and soil chemical properties (total C, total N, inorganic N, extractable P, K, Ca, Mg, Fe, and Mn) were significantly positive across altitudinal sites, while soil pH was significantly negative. Although the relative REs on investigated variables varied significantly among altitudes, the relative REs did not show a clear trend with the increased altitudes. Across altitudes, the mean magnitude of ecosystem-level REs on Cmin and net Nmin were 19% (ranging from 4% to 48%) and 16% (ranging from 3% to 34%), respectively. Furthermore, the magnitude of ecosystem-level rhizosphere effects increased linearly with the increased altitudes. The altitudinal patterns of ecosystem-level RE mainly depend on the percentage of rhizosphere soil mass. In conclusion, our results provided a set of new evidence for the REs, and highlighted the need to incorporate REs into land C and N models.

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Section: The Magnitude and Direction Of Relative Rhizosphere Effects ...supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Rhizosphere Effects along an Altitudinal Gradient of the Changbai Mountain, China

Huo

Yin

et al. 2022

Forests

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“…In contrast, bulk soil has relatively oligotrophic conditions, with low rates of nutrient transformation and microbial activity ( Ai et al, 2012 ). A recent meta-analysis showed that rhizosphere effect of woody plants could accelerate the biogeochemical cycling in rhizosphere soil and increased soil C and nutrient pool ( Gan et al, 2021 ). Moreover, the distributional patterns and drivers of microbial communities may differ between rhizosphere and bulk soil ( Fan et al, 2018 ; Liu et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Changes in Bulk and Rhizosphere Soil Microbial Diversity and Composition Along an Age Gradient of Chinese Fir (Cunninghamia lanceolate) Plantations in Subtropical China

et al. 2022

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Soil microorganisms play key roles in biogeochemical cycling in forest ecosystems. However, whether the responses of microbial community with stand development differed in rhizosphere and bulk soils remains unknown. We collected rhizosphere and bulk soil in Chinese fir plantations with different stand ages (7a, 15a, 24a, and 34a) in subtropical China, and determined bacterial and fungal community variation via high-throughput sequencing. The results showed that soil bacterial, but not fungal, community diversity significantly differed among stand ages and between rhizosphere and bulk soils (p < 0.05). The differences in Shannon–Wiener and Simpson’s indices between rhizosphere and bulk soil varied with stand age, with significant higher soil bacterial diversity in rhizosphere than bulk soils in 7a and 34a plantations (p < 0.05), but there were no significant difference in soil bacterial diversity between rhizosphere and bulk soils in 15a and 24a plantations (p > 0.05). Soil microbial community composition varied significantly with stand age but not between the rhizosphere and bulk soil. The dominant bacterial phyla at all ages were Acidobacteria and Proteobacteria, while the dominant fungal phyla were Ascomycota and Basidiomycota in both rhizosphere and bulk soil. They showed inconsistent distribution patterns along stand age gradient (7–34a) in the rhizosphere and bulk soil, suggesting distinct ecological strategy (r-strategist vs. k-strategist) of different microbial taxa, as well as changes in the microenvironment (i.e., nutrient stoichiometry and root exudates). Moreover, bacterial and fungal community composition in rhizosphere and bulk soil were governed by distinct driving factors. TP and NH4+–N are the two most important factors regulating bacterial and fungal community structure in rhizosphere soil, while pH and NO3––N, DON, and TN were driving factors for bacterial and fungal community structure in bulk soil, respectively. Collectively, our results demonstrated that the changes in microbial diversity and composition were more obvious along stand age gradients than between sampling locations (rhizosphere vs. bulk soil) in Chinese fir plantations.

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“…In addition, certain specific substances secreted by plant roots through physiological action cause the rhizosphere soil environment to differ from that of bulk soils, thus recruiting different bacteria and fungi (Zhang et al, 2018). Rhizosphere effects have been found surrounding the roots of different crops and trees and are affected by host plant characteristics and management (Gan et al, 2021; Wu et al, 2021). In general, microbial communities influence plant growth in an indirect manner through symbiosis, competition for resources, and pathogenic consequences (Li et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Pecan plantation age influences the structures, ecological networks, and functions of soil microbial communities

et al. 2022

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Understanding the changes in microbial communities with increasing plantation age will benefit the maintenance of forest health and productivity and the sustainable development of forest ecosystems. It was not clear before this study whether the microbial communities of pecan (Carya illinoinensis) plantations would be affected by their age. Based on MiSeq sequencing, we studied the effects of pecan age on microbial communities in rhizosphere and bulk soils of pecan plantations for the first time.The results showed that the bacterial alpha diversity of bulk soil increased significantly with plantation age (p < 0.05), while fungal alpha diversity was less influenced by pecan age in both rhizosphere soil and bulk soil. Pecan age significantly influenced

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Rhizosphere effects of woody plants on soil biogeochemical processes: A meta-analysis

Cited by 49 publications

References 113 publications

Rhizosphere Effects along an Altitudinal Gradient of the Changbai Mountain, China

Rhizosphere Effects along an Altitudinal Gradient of the Changbai Mountain, China

Changes in Bulk and Rhizosphere Soil Microbial Diversity and Composition Along an Age Gradient of Chinese Fir (Cunninghamia lanceolate) Plantations in Subtropical China

Pecan plantation age influences the structures, ecological networks, and functions of soil microbial communities

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