Soil pH dominates elevational diversity pattern for bacteria in high elevation alkaline soils on the Tibetan Plateau

Shen, Congcong; Shi, Yu; Fan, Kunkun; He, Jin‐Sheng; Adams, Jonathan M.; Ge, Yuan; Chu, Haiyan

doi:10.1093/femsec/fiz003

Cited by 101 publications

(86 citation statements)

References 44 publications

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“…As such, the results show that in the rhizosphere of ancient tea trees, most bacterial phyla (relative abundance> 1%) changed along elevation are driven by only a few soil properties. For instance, the relative abundances of Proteobacteria were positively correlated with soil pH, while Acidobacteria showed the opposite pattern, although only the mild fluctuations (soil pH ranged from 4.56 to 4.64), which concurred with other reports 39,51,52 . These results suggested that soil pH was considered as an important factor of the rhizosphere bacterial community composition in the ancient wild tea by affecting the dominant phylum (Proteobacteria and Acidobacteria).…”

Section: Discussionsupporting

confidence: 89%

Change of rhizospheric bacterial community of the ancient wild tea along elevational gradients in Ailao mountain, China

Jiang

Cheng

et al. 2020

Sci Rep

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The rhizospheric microbial community is one of the major environmental factors affecting the distribution and fitness of plants. Ancient wild tea plants are rare genetic resource distributed in Southwest China. In this study, we investigated that rhizospheric bacterial communities of ancient wild tea plants along the elevational gradients (2050, 2200, 2350 and 2500 m) in QianJiaZhai Reserve of Ailao Mountains. According to the Illumina MiSeq sequencing of 16 S rRNA gene amplicons, Proteobacteria, Acidobacteria and Actinobacteria were the dominant phyla with the relative abundance 43.12%, 21.61% and 14.84%, respectively. The Variibacter was the most dominant genus in rhizosphere of ancient wild tea plant. Phylogenetic null modeling analysis suggested that rhizospheric bacterial communities of ancient wild tea plants were more phylogenetically clustered than expected by chance. The bacterial community at 2050 m was unique with the highest alpha diversity, tend to cluster the nearest taxon and simple co-occurrence network structure. The unique bacterial community was correlated to multiple soil factors, and the content soil ammonium nitrogen (nH 4 +-N) was the key factor affecting the diversity and distribution of bacterial community along the elevational gradients. This study provided the necessary basic information for the protection of ancient tea trees and cultivation of tea plants.

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Section: Discussionsupporting

confidence: 89%

Change of rhizospheric bacterial community of the ancient wild tea along elevational gradients in Ailao mountain, China

Jiang

Cheng

et al. 2020

Sci Rep

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“…Microbial responses to elevational gradients remain mixed. Some studies found that soil bacteria showed decreasing diversity patterns (Bryant et al ., 2008; Wang et al ., 2015; Nottingham et al ., 2018; Shen et al ., 2019). For example, one of the earliest studies reported that the diversity of soil Acidobacteria monotonically decreased with the increasing elevation (Bryant et al ., 2008).…”

Section: Introductionmentioning

confidence: 99%

Contrasting patterns and drivers of soil bacterial and fungal diversity across a mountain gradient

Shen

Gunina

Luo

et al. 2020

Environmental Microbiology

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150

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Summary Microbial elevational diversity patterns have been extensively studied, but their shaping mechanisms remain to be explored. Here, we examined soil bacterial and fungal diversity and community compositions across a 3.4 km elevational gradient (consists of five elevations) on Mt. Kilimanjaro located in East Africa. Bacteria and fungi had different diversity patterns across this extensive mountain gradient—bacterial diversity had a U shaped pattern while fungal diversity monotonically decreased. Random forest analysis revealed that pH (12.61% importance) was the most important factor affecting bacterial diversity, whereas mean annual temperature (9.84% importance) had the largest impact on fungal diversity, which was consistent with results obtained from mixed‐effects model. Meanwhile, the diversity patterns and drivers of those diversity patterns differ among taxonomic groups (phyla/classes) within bacterial or fungal communities. Taken together, our study demonstrated that bacterial and fungal diversity and community composition responded differently to climate and edaphic properties along an extensive mountain gradient, and suggests that the elevational diversity patterns across microbial groups are determined by distinct environmental variables. These findings enhanced our understanding of the formation and maintenance of microbial diversity along elevation, as well as microbial responses to climate change in montane ecosystems.

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“…Bacteria are among the single celled organisms most able to adapt to and thrive under harsh environmental pH conditions. Acidic soils are dominated by Acidobacteria and Alphaproteobacteria (Shen et al, 2019) while Actinobacteria abundance increases toward alkalinity (Jeanbille et al, 2016). However, the most sensitive component of the cell to pH changes is its workhorse, the protein (Hyyryläinen et al, 2001).…”

Section: Microbial Communities In Relation To Soil Phmentioning

confidence: 99%

“…High pH disrupts the bonds holding together the DNA helix strands, and lipid hydrolysis occurs more readily as the environment becomes more basic (Rousk et al, 2010;Shen et al, 2019). Most microbes adjust their surrounding medium to near neutrality as a way to survive high pH.…”

Section: Alkalinity Tolerance In Pgpmmentioning

confidence: 99%

The Roles of Plant Growth Promoting Microbes in Enhancing Plant Tolerance to Acidity and Alkalinity Stresses

Msimbira

Smith

2020

Front. Sustain. Food Syst.

202

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Plant growth often occurs under a range of stressful conditions, including soil acidity and alkalinity. Hydrogen ion concentration, which determines pH of the soil, regulates the entire chemistry of plant nutrient colloidal solutions. Beyond certain levels of pH, multiple stresses such as hydrogen ion toxicity, and nutrient imbalance, toxicities and deficiencies are induced in plants. Breeding for stress coupled with suitable agronomic practices has been a way to deal with this situation in agriculture. However, plant growth promoting microbes (PGPM) have shown potential as sustainable plant growth enhancers and have potential to help with a range of stresses in their environment. Considering the long-term evolutionary relationships between plants and microbes, it is probably that much remains unknown about potential benefits of microbes that could be harnessed from PGPM. This article reviews the current understanding of acidity and alkalinity stress effects on plants and various approaches have or could address these stresses. This review provides a detailed account of the current understanding regarding the role of PGPM in acidity and alkalinity stress management, including when agronomic practices and plant breeding are combined. Approaches already evaluated have shown limitations because acidity and alkalinity in soils are gradual and progressive conditions. Greater exploitation of PGPM in this regard, would be interesting to explore as they have the potential to address multiple stresses in a more sustainable fashion. Future crop production will require further breeding for pH stress resistance, but also implementation of microbial technologies that provide enhanced tolerance to pH stress.

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Soil pH dominates elevational diversity pattern for bacteria in high elevation alkaline soils on the Tibetan Plateau

Cited by 101 publications

References 44 publications

Change of rhizospheric bacterial community of the ancient wild tea along elevational gradients in Ailao mountain, China

Change of rhizospheric bacterial community of the ancient wild tea along elevational gradients in Ailao mountain, China

Contrasting patterns and drivers of soil bacterial and fungal diversity across a mountain gradient

The Roles of Plant Growth Promoting Microbes in Enhancing Plant Tolerance to Acidity and Alkalinity Stresses

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