Microbiomes of Virgin Soils of Southern Vietnam Tropical Forests

Чернов, Т. И.; Железова, А. Д.; Тхакахова, А. К.; Bgazhba, N. A.; Zverev, Aleksei

doi:10.1134/s0026261719040040

Cited by 16 publications

(12 citation statements)

References 32 publications

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“…This must be prospected and confirmed in the future by analysis of soil beneath the natural savanna of the area in comparison to the savanna from another region. Being associated at all levels to the bacterial community, even though at the lesser extent than S, C is revealed to be a matter factor driving biogeochemical processes such C and N mineralization and cycling of the studied soils and confirms other studies highlighting its importance in forest ecosystems [27,31,74]. Correlation between soil N and C/N ratio and bacterial community has been detected only at the class and genus levels, respectively.…”

Section: Discussionsupporting

confidence: 86%

“…The positive correlation between soil attributes (C, S, available P, and C/N ratio) and soil bacterial community in the mixed Acacia in Eucalyptus plantations indicated improved soil fertility with the potential to sustain forest productivity and ecosystems. Nutrient cycling (C, N, S, and P), i.e., its link to microbiota, exerts an important role in processes such as arbuscular mycorrhizal fungi colonization, phosphatase activities, atmospheric N fixation, and C sequestration [9,10,27,74,77], especially in the nutrient-poor soils such as those of the Congolese coastal plains. In fact, in the less infertile soils, no correlation was reported between soil attributes and bacterial community beneath Acacia and Eucalyptus plantations at Itatinga (Brazil) in a young forest (27 and 39 months) [23].…”

Section: Discussionmentioning

confidence: 99%

“…A better understanding of the soil microbial community in mixed and pure plantations under different soil and climate conditions is crucial to understand how soil microorganisms contribute to regulating ecosystem functioning, SOM dynamics, and nutrient cycling (C, N, S, and P). Organic C content greatly influences and drives the abundance of microorganisms in tropical forests [27], whereas N addition may induce a decline in bacterial species richness and diversity and a shift of bacterial composition [28]. Despite its negative impact on soil acidification, soil buffering capacity, and vegetation diversity, sulfur (S) has a potential to stimulate growth and to enhance the biomass of Actinobacteria, gram-positive bacteria, and fungi [29], while available P is enhanced by arbuscular mycorrhizal fungi colonization, phosphatase activities, and organic acids liberated by plants and microorganisms [30].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Acacia mangium on Soil Fertility and Bacterial Community in Eucalyptus Plantations in the Congolese Coastal Plains

et al. 2020

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Productivity and sustainability of tropical forest plantations greatly rely on regulation of ecosystem functioning and nutrient cycling, i.e., the link between plant growth, nutrient availability, and the microbial community structure. So far, these interactions have never been evaluated in the Acacia and Eucalyptus forest planted on infertile soils in the Congolese coastal plains. In the present work, the soil bacterial community has been investigated by metabarcoding of the 16S rRNA bacterial gene in different stands of monoculture and mixed-species plantation to evaluate the potential of nitrogen-fixing trees on nutrient and bacterial structure. At the phylum level, the soil bacterial community was dominated by Actinobacteria, followed by Proteobacteria, Firmicutes, and Acidobacteria. A principal coordinate analysis revealed that bacterial communities from pure Eucalyptus, compared to those from plantations containing Acacia in pure and mixed-species stands, showed different community composition (beta-diversity). Regardless of the large variability of the studied soils, the prevalence of Firmicutes phylum, and lower bacterial richness and phylogenic diversity were reported in stands containing Acacia relative to the pure Eucalyptus. Distance-based redundancy analysis revealed a positive correlation of available phosphorus (P) and carbon/nitrogen (C/N) ratio with bacterial community structure. However, the Spearman correlation test revealed a broad correlation between the relative abundance of bacterial taxa and soil attributes, in particular with sulfur (S) and carbon (C), suggesting the important role of soil bacterial community in nutrient cycling in this type of forest management. Concerning mixed plantations, a shift in bacterial community structure was observed, probably linked to other changes, i.e., improvement in soil fertility (enhanced P and C dynamics in forest floor and soil, and increase in soil N status), and C sequestration in both soil and stand wood biomass with the great potential impact to mitigate climate change. Overall, our findings highlight the role of soil attributes, especially C, S, available P, and C/N ratio at a lesser extent, in driving the soil bacterial community in mixed-species plantations and its potential to improve soil fertility and to sustain Eucalyptus plantations established on the infertile and sandy soils of the Congolese coastal plains.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Acacia mangium on Soil Fertility and Bacterial Community in Eucalyptus Plantations in the Congolese Coastal Plains

et al. 2020

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“…It is likely that the Acidobacteria of subgroup 2 can be considered to be characteristic of the genesis of various acidic tropical soils that are poor in organic matter. It should be noted that, in general, our data on the terrestrial soils confirms and refines recently reported data on the microbiotas of terrestrial soils in the Cat Tien National Park [57].…”

Section: Discussionsupporting

confidence: 91%

Microbiomes in Suspended Soils of Vascular Epiphytes Differ from Terrestrial Soil Microbiomes and from Each Other

2021

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Microbial biodiversity parameters for tropical rainforests remain poorly understood. Whilst the soil microbiome accounts up to 95% of the total diversity of microorganisms in terrestrial ecosystems, the microbiome of suspended soils formed by vascular epiphytes remains completely unexplored. Samples of ground and suspended soils were collected in Cat Tien National Park, southern Vietnam. DNA extraction and sequencing were performed, and libraries of 16s rDNA gene sequences were analyzed. Alpha diversity indices of the microorganisms were the highest in the forest ground soil. In general, the microbiological diversity of all the soil types was found to be similar at the phylum level. Taxonomic composition of the bacterial communities in the suspended soils of plants from the same species are not closer than the taxonomic compositions of the communities in the suspended soils of different plant species. However, the beta diversity analysis revealed significant differences in the movement of mineral elements in terrestrial versus suspended soils. Our data showed that the suspended soils associated with vascular epiphytes were a depository of unique microbiological biodiversity. A contributing factor was the presence of large amounts of organic matter in the suspended soils—deposits collected by the epiphytes—which would have been degraded by termites if it had reached the ground. Further, the nutrient content of the suspended soils was prime for soil respiration activity and taxonomic microbial community biodiversity.

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“…3A). These groups are widely distributed in ne earth, most of them showing a positive correlation with pH and a negative relationship with nutrient elements, such as soil organic carbon, TN, and available phosphorus [35,36]. The genomes of Acidobacteria encode large enzyme complements for degrading complex carbohydrates, which, in turn, impacts on the carbon distribution in the soil [37].…”

Section: Discussionmentioning

confidence: 99%

Soil bacterial communities associated with stony soils influence the tuber size of Tetrastigma hemsleyanum

Guo¹,

Hong²,

Zhang³

et al. 2020

Preprint

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Background Plants grown in stony soils have better-developed root systems and higher crop yields than those grown in non-stony soils. The roles of various physical and chemical effects of stony soils on plant growth have been published, but the roles of soil microbiota and rhizosphere microbiota have not been investigated. Methods Tetrastigma hemsleyanum plants were cultivated for two years in stony soils and in the same soil from which rock-fragments had been removed. The microbiome and the tuber transcriptome were analyzed, using multiple bioinformatics methods. Results The soil microbiota of these two soils were markedly different, and the stony soils contained high abundances of bacterial taxa belonging to the Actinobacteria, Rokubacteria, Rhizobiales, Desulfarculaceae, and Chthoniobacteraceae. These discriminatory taxa in soils may promote the tuber growth of T. hemsleyanum, through releasing nutrients from rocks and colonizing the rhizosphere and tuber surface of T. hemsleyanum. In addition, stony soils induced a dramatic change in the tuber’s transcriptome, particularly with respect to the pathways of phytohormone biosynthesis, photosynthesis, and biotic stress resistance, expression levels of which showed strong correlations with the aforementioned bacterial taxa. Conclusions These results indicated that beneficial effects of stony soils on plant growth may be closely correlated with their specific microbiota, which can, in turn, influence multiple biological processes of host. This is the first study to reveal the role of stony soils-driven microbiota in tuber growth, and stony soils can represent a microbial repository for the screening of microbial isolates to increase plant yield.

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Microbiomes of Virgin Soils of Southern Vietnam Tropical Forests

Cited by 16 publications

References 32 publications

Influence of Acacia mangium on Soil Fertility and Bacterial Community in Eucalyptus Plantations in the Congolese Coastal Plains

Influence of Acacia mangium on Soil Fertility and Bacterial Community in Eucalyptus Plantations in the Congolese Coastal Plains

Microbiomes in Suspended Soils of Vascular Epiphytes Differ from Terrestrial Soil Microbiomes and from Each Other

Soil bacterial communities associated with stony soils influence the tuber size of Tetrastigma hemsleyanum

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