scholarly journals Increased Tea Saponin Content Influences The Diversity and Function of Plantation Soil Microbiomes

2021 ◽  
Author(s):  
Shouke Zhang ◽  
Junqia Kong ◽  
Zikun Li ◽  
Feng Song ◽  
Xinhua He ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Cellulose Degradation ◽  
Plant Secondary Metabolites ◽  
Soil Microbiome ◽  
Soil Physicochemical Properties ◽  
Bacterial Populations ◽  
The Core ◽  
Tea Saponin ◽  
Saponin Content

Abstract Background Plant secondary metabolites (PSMs) can affect the structures and functions of soil microbiomes. However, the core bacteria associated with PSMs, and their corresponding functions have not been explored extensively. In this study, soil physicochemical properties, tea saponin contents, microbial community compositions, and microbial community functions of different-age Camellia oleifera plantation soils from representative regions were analyzed. We evaluated the effects of plantation age increase on PSM accumulation, and the subsequent consequences on the structures and functions of soil microbiomes. Results Plantation ages increase positively corresponded with accumulated tea saponin contents, with negative effects on soil physicochemical properties, and soil microbiome structures and functions. Older plantation soil microbiomes exhibited simpler structures, lower diversity, and relatively looser putative interactions based on network analysis. Clearly, the core functions of soil microbiomes transitioned to those associated with PSM metabolisms, while microbial pathways involved in cellulose degradation were inhibited. Degradation experiments further confirmed that older plantation soils exhibited the higher capacity on tea saponin degradation but poorer on furfural. Conclusions This study systematically explored the influences of PSMs on soil microbiomes via the investigation of key bacterial populations and their functional pathways. With the increase of planting years, increased tea saponin content simplified the soil microbiomes diversity, inhibited the degradation of organic matter, and enriched the genes related to the degradation of tea saponin. These findings significantly advance our understanding on PSMs-microbiome interactions and could provide fundamental and important data for sustainable management of Camellia plantations.

scholarly journals Insight into the Characteristics of Soil Microbial Diversity during the Ecological Restoration of Mines: A Case Study in Dabaoshan Mining Area, China

2021 ◽  
Vol 13 (21) ◽  
pp. 11684
Author(s):  
Li Fan ◽  
Weiping Zhao ◽  
Wendan Feng ◽  
Ping Mo ◽  
Yunlin Zhao ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Microbial Diversity ◽  
Ecological Restoration ◽  
Soil Microbial Community ◽  
Mining Area ◽  
Soil Restoration ◽  
Soil Physicochemical Properties ◽  
Soil Microbial Diversity ◽  
Soil Microbial

Soil microorganisms play an important role in regulating a variety of ecological functions. In recent years, the research on ecological restoration after mining has made people more aware of the importance of microbial diversity to ecosystem restoration. The present study investigated the effect of ecological restoration on microbial community structure and its relationship with soil physicochemical properties in the Dabaoshan mining area, China. High throughput sequencing technology was used to analyze and compare the microbial community composition of three types of soil (undamaged area, unrestoration area, and ecological restoration area). The contents of organic carbon, total nitrogen, and total phosphorus were 2.38–12.97 g/kg, 0.39–1.62 g/kg, and 0.99–1.51 g/kg, respectively. In different soil states, undamaged area and ecological restoration area were significantly higher than those in unrestoration area. The results showed that the structure of soil microbial community was significantly correlated with soil physicochemical properties, and formations in the repaired and unrepaired soils were different. Operational Taxonomic Unit (OTU) cluster analysis and diversity index analysis showed that soil microbial community changed at phylum and genus levels. The results showed that at the phylum level, all soil samples contained Firmicutes, Proteobacteria, and actinobacteria. Firmicutes and Proteobacteria of the ecological restoration area (ER1, ER2) were the highest in relative abundance compared with other samples, accounting for more than 45%. Proteobacteria and Acidobacteria were the dominant phylum in the undamaged area (UD), accounting for 32.7% and 22.3%, respectively. It can be seen that soil restoration produced a new dominant population, and Proteobacteria showed an absolute competitive advantage in the mining soil.

scholarly journals Increased Tea Saponin Content Influences the Diversity and Function of Plantation Soil Microbiomes

2022 ◽  
Author(s):  
Shouke Zhang ◽  
Junqia Kong ◽  
Longfei Chen ◽  
Kai Guo ◽  
Xudong Zhou
Keyword(s):  
Secondary Metabolites ◽  
Theoretical Basis ◽  
Plant Secondary Metabolites ◽  
Plant Litter ◽  
Decomposition Process ◽  
Ecological Management ◽  
Tea Saponin ◽  
Management Measures ◽  
Saponin Content ◽  
And Function

Plant secondary metabolites (PSMs) contained in plant litter will be released into soil with the decomposition process, which will affect the diversity and function of soil microbiomes. The response of soil microbiomes to PSMs in terms of diversity and function can provide an important theoretical basis for plantations to put forward rational soil ecological management measures.

scholarly journals Manure substitution of chemical fertilizer affect soil microbial community diversity, structure and function in greenhouse vegetable production systems

2019 ◽  
Author(s):  
Haoan Luan ◽  
Wei Gao ◽  
Shaowen Huang ◽  
Jiwei Tang ◽  
Mingyue Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Soil Microbial Community ◽  
Enzyme Activities ◽  
Substitution Rate ◽  
Soil Microbial Communities ◽  
Chemical Fertilizer ◽  
Soil Physicochemical Properties ◽  
Soil Microbial ◽  
Microbial Characteristics

ABSTRACTSoil microbial community and enzyme activities together affect various ecosystem functions of soils. Fertilization, as important agricultural management practices, are known to modify soil microbial characteristics; however, inconsistent results have been reported. The aim of this research therefore was to make a comparative study of the effects of different fertilization patterns (No N inputs (No N), 100% chemical fertilizer-N (CN) inputs (4/4CN) and different substitution rates of CN by organic manure-N (MN) (3/4CN+1/4MN, 2/4CN+2/4MN and 1/4CN+3/4MN)) on soil physicochemical properties, enzyme activities and microbial attributes in a GVP of Tianjin, China. Manure substitution of chemical fertilizer, especially at higher substitution rate (2/4CN+2/4MN and 1/4CN+3/4MN), improved soil physicochemical properties (higher soil organic C (SOC) and nutrient contents; lower bulk densities), promoted microbial growth (higher total phospholipid fatty acids and microbial biomass C contents) and activity (higher soil hydrolase activities). Manure addition caused a remarkable increase of the fungi/bacteria ratio and a distinct shift in the fungal (bacterial) community to greater abundance of arbuscular mycorrhizal fungi (G+ bacteria) compared with saprotrophic fungi (G− bacteria). These changes drove shifts toward fungal-dominated soil microbial communities and then optimized microbial community structure. Also, manure application increased soil biodiversity (microbial community and enzyme function), indicated by increased Shannon–Wiener diversity. Redundancy analysis indicated that the most possible mechanism of the impacts of different fertilization patterns on soil microbial characteristics may be the mediation of SOC and nutrient (N) availability (especially SOC) in this GVP of China. In conclusion, manure substitution of chemical fertilizer, especially at higher substitution rate, was more efficient for improving soil quality and biological functions.

scholarly journals Effects of Allelochemicals, Soil Enzyme Activities, and Environmental Factors on Rhizosphere Soil Microbial Community of Stellera chamaejasme L. along a Growth-Coverage Gradient

2022 ◽  
Vol 10 (1) ◽  
pp. 158
Author(s):  
Jinan Cheng ◽  
Hui Jin ◽  
Jinlin Zhang ◽  
Zhongxiang Xu ◽  
Xiaoyan Yang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Soil Microbial Community ◽  
Enzyme Activities ◽  
Rhizosphere Soil ◽  
Soil Enzyme ◽  
Soil Physicochemical Properties ◽  
Soil Enzyme Activities ◽  
Soil Microbial ◽  
Stellera Chamaejasme

Allelochemicals released from the root of Stellera chamaejasme L. into rhizosphere soil are an important factor for its invasion of natural grasslands. The aim of this study is to explore the interactions among allelochemicals, soil physicochemical properties, soil enzyme activities, and the rhizosphere soil microbial communities of S. chamaejasme along a growth-coverage gradient. High-throughput sequencing was used to determine the microbial composition of the rhizosphere soil sample, and high-performance liquid chromatography was used to detect allelopathic substances. The main fungal phyla in the rhizosphere soil with a growth coverage of 0% was Basidiomycetes, and the other sample plots were Ascomycetes. Proteobacteria and Acidobacteria were the dominant bacterial phyla in all sites. RDA analysis showed that neochamaejasmin B, chamaechromone, and dihydrodaphnetin B were positively correlated with Ascomycota and Glomeromycota and negatively correlated with Basidiomycota. Neochamaejasmin B and chamaechromone were positively correlated with Proteobacteria and Actinobacteria and negatively correlated with Acidobacteria and Planctomycetes. Allelochemicals, soil physicochemical properties, and enzyme activity affected the composition and diversity of the rhizosphere soil microbial community to some extent. When the growth coverage of S. chamaejasme reached the primary stage, it had the greatest impact on soil physicochemical properties and enzyme activities.

scholarly journals Effects of Biochar Application on Soil Nitrogen Conversion and Microbial Community Composition

2021 ◽  
Author(s):  
Pingnan Zhao ◽  
Shen Wang ◽  
Dong Liu ◽  
Hongxu Li ◽  
Song Han ◽  
...  
Keyword(s):  
Microbial Community ◽  
Physicochemical Properties ◽  
Nitrate Nitrogen ◽  
Microbial Community Composition ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Control Treatment ◽  
Soil Physicochemical Properties ◽  
Soil System ◽  
Biomass Char

Abstract In northeastern China, successive years of cultivation have led to a decline in soil quality, a process that is exacerbated by the over-application of chemical fertilizers to ensure staple food production. The large amount of straw produced by cultivation is difficult to effectively use in recent years. There has been an increasing amount of research on the transforming straw into biomass char, but it has often focused on the effects of biomass char addition on soil physicochemical properties, without further exploring the mechanisms of this process and its effects on soil microorganisms. Microorganisms are an important part of the soil system and the process of how biomass char addition affects microorganisms through its effect on soil physicochemical properties should not be overlooked. In this study， the effect of biochar application at different preparation temperatures (300°C, 400°C and 500°C) and addition contents (0.1% and 1%) on ammonia, nitrate and total nitrogen in soil leachates were investigated. The effect of microbial sequencing on the dynamics of carbon and nitrogen was also investigated to reveal the mechanisms contributing to the changes in nitrogen forms. The results showed that biochar had a better adsorption ability on ammonia nitrogen, and biochar promoted the conversion of ammonia nitrogen to nitrate nitrogen by nitrifying bacteria. The addition of 1% biochar (prepared at 500°C) increased nitrate-nitrogen leaching by 86.52% compared to the control treatment. The sequencing of microorganisms also revealed that biochar changed the structure and abundance of the soil microbial community, especially increasing the relative abundance of the Helicobacter nitrification phylum by 2.02%. These results indicates that biochar facilitated the adsorption of ammonium nitrogen and the conversion of nitrate nitrogen, and solving the problem of low nitrogen fertilizer utilization while promoting the formation of beneficial bacteria in the soil.

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