Dataset Information

Coexistence patterns of soil methanogens are closely tied to methane generation and community assembly in rice paddies.

ABSTRACT:

Background

Soil methanogens participate in complex interactions, which determine the community structures and functions. Studies continue to seek the coexistence patterns of soil methanogens, influencing factors and the contribution to methane (CH₄) production, which are regulated primarily by species interactions, and the functional significance of these interactions. Here, methane emissions were measured in rice paddies across the Asian continent, and the complex interactions involved in coexistence patterns of methanogenic archaeal communities were represented as pairwise links in co-occurrence networks.

Results

The network topological properties, which were positively correlated with mean annual temperature, were the most important predictor of CH₄ emissions among all the biotic and abiotic factors. The methanogenic groups involved in commonly co-occurring links among the 39 local networks contributed most to CH₄ emission (53.3%), much higher than the contribution of methanogenic groups with endemic links (36.8%). The potential keystone taxa, belonging to Methanobacterium, Methanocella, Methanothrix, and Methanosarcina, possessed high linkages with the methane generation functional genes mcrA, fwdB, mtbA, and mtbC. Moreover, the commonly coexisting taxa showed a very different assembly pattern, with ~?30% determinism and ~?70% stochasticity. In contrast, a higher proportion of stochasticity (93~99%) characterized the assembly of endemically coexisting taxa.

Conclusions

These results suggest that the coexistence patterns of microbes are closely tied to their functional significance, and the potential importance of common coexistence further imply that complex networks of interactions may contribute more than species diversity to soil functions. Video abstract.

SUBMITTER: Li D

PROVIDER: S-EPMC7825242 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Publications

Coexistence patterns of soil methanogens are closely tied to methane generation and community assembly in rice paddies.

Li Dong D Ni Haowei H Jiao Shuo S Lu Yahai Y Zhou Jizhong J Sun Bo B Liang Yuting Y

Microbiome 20210122 1

<h4>Background</h4>Soil methanogens participate in complex interactions, which determine the community structures and functions. Studies continue to seek the coexistence patterns of soil methanogens, influencing factors and the contribution to methane (CH<sub>4</sub>) production, which are regulated primarily by species interactions, and the functional significance of these interactions. Here, methane emissions were measured in rice paddies across the Asian continent, and the complex interaction ...[more]

PMID: 33482926

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Project description:Soil microbes are considered the second genome of plants. Understanding the distribution and network of aluminum (Al)-tolerant microorganisms is helpful to alleviate Al toxicity to plants in acidic soils. Here, we examined soluble Al3+ and bacterial communities carrying Al resistance genes in paddy soils with a soil pH range of 3.6 to 8.7. In the acidic soil with pH <5.1, the content of Al3+ increased significantly. There were abundant and diverse Al-tolerant microorganisms in acidic soils, including Clostridium, Bacillus, Paenibacillus, Desulfitobacterium, and Desulfosporosinus, etc. Moreover, compared with neutral and alkaline soils, the network structure of Al-tolerant microorganisms was more complex. The potential roles of major Al-tolerant microbial taxa on each other in the ecological network were identified by a directed network along 0.01 pH steps. The influential taxa in the network had a broader niche and contained more antioxidant functional genes to resist Al stress, indicating their survival advantage over the sensitive taxa. Our study is the first to explore the distribution of Al-tolerant microorganisms in continental paddies and reveal their potential associations mediated by pH, which provides a basis for further utilization of microbial resources in acidic agricultural soils. IMPORTANCE Aluminum (Al) toxicity is the primary limiting factor of crop production in acidic soils with pH <5.0. Numerous studies have focused on the mechanism of Al toxicity and tolerance in plants; however, the effects of Al toxicity on soil microorganisms and their tolerance remain less studied. This study investigated the distribution and association patterns of Al-tolerant microorganisms across continental paddy fields with a soil pH range of 3.6 to 8.7. The results showed that soil pH filters exchangeable Al3+ content, diversity, and potential associations of Al-tolerant microbial community. The influential taxa in community network play an important role in Al tolerance and have potential applications in mitigating Al toxicity and promoting crop growth in acidic soils.

Dataset Information

Coexistence patterns of soil methanogens are closely tied to methane generation and community assembly in rice paddies.

Background

Results

Conclusions

Publications

Coexistence patterns of soil methanogens are closely tied to methane generation and community assembly in rice paddies.

Similar Datasets

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