Volatile-mediated suppression of plant pathogens is related to soil properties and microbial community composition

Abstract Aims Nitrogen (N) deposition is a global environmental problem that can alter community compositions and functions, and consequently, the ecosystem services. In this study, we assessed the responses of aboveground vegetation, surface soil properties and microbial communities to N addition, and explored the drivers of microbial community in a semiarid steppe ecosystem in northwest of China. Methods Thirty-six 6×10-m2 plots composed of six N addition levels and six replicates were distributed in six columns and six rows. Nine vegetation characteristics and seven soil properties were measured and calculated. Soil microbial characteristics were analyzed by 16S rRNA high-throughput sequencing. Results N addition positively affected aboveground vegetation traits such as the community weighted-mean of leaf nitrogen content (LNCWM). High N inputs significantly altered the microbial community assembly process from random to deterministic. The microbial community diversity and composition, however, were not sensitive to N addition. A piecewise structural equation model (SEM) further showed that the microbial community composition was affected by both aboveground vegetation and soil properties. The composition of bacterial communities was mainly regulated by the composition of plant communities and soil total N. In contrast, the composition of fungal communities was driven by soil pH and the community weighted-mean of specific leaf area (SLACWM). Microbial diversity and composition remained unchanged because their drivers were not affected by N addition. The results of this research improved our understanding of the response of grassland ecosystems to N deposition, and provided a theoretical basis for grassland utilization and management under N deposition.

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The effects of 55 years of different inorganic fertiliser regimes on soil properties and microbial community composition

Soil Biology and Biochemistry ◽

10.1016/j.soilbio.2013.08.008 ◽

2013 ◽

Vol 67 ◽

pp. 41-46 ◽

Cited By ~ 55

Author(s):

Alwyn Williams ◽

Gunnar Börjesson ◽

Katarina Hedlund

Keyword(s):

Microbial Community ◽

Soil Properties ◽

Community Composition ◽

Microbial Community Composition ◽

Inorganic Fertiliser

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Soil microbial community composition in a paddy field with different fertilization managements

Canadian Journal of Microbiology ◽

10.1139/cjm-2020-0590 ◽

2021 ◽

pp. 1-11

Author(s):

Limin Wang ◽

Dongfeng Huang

Keyword(s):

Community Structure ◽

Microbial Community ◽

Soil Properties ◽

Microbial Communities ◽

Community Composition ◽

Microbial Community Composition ◽

Alpha Diversity ◽

Phosphorus Fertilization ◽

Bacterial Phyla ◽

P Fertilizer

Microbes play vital roles in soil quality; however, their response to N (nitrogen) and P (phosphorus) fertilization in acidic paddy soils of subtropical China remains poorly understood. Here, a 10-year field experiment was conducted to evaluate the effects of different fertilization treatments on microbial communities by Illumina MiSeq sequencing. The results showed that different fertilization treatments did not exert a significant effect on microbial alpha diversity, but altered soil properties, and thus affected microbial community composition. The microbial communities in the T1 (optimized N and P fertilizer) and T2 (excessive N fertilizer) treated soils differed from those in the T0 (no N and P fertilizer) and T3 (excessive P fertilizer) treated soils. In addition, the bacterial phyla Proteobacteria, Chloroflexi, and Acidobacteria, and the fungal phyla Ascomycota and Basidiomycota dominated all the fertilized treatments. Soil total potassium (TK) concentration was the most important factor driving the variation in bacterial community structure under different fertilization regimes, while the major factors shaping fungal community structure were soil TN and NO3–-N (nitrate N). These findings indicate that optimization of N and P application rates might result in variations in soil properties, which changed the microbial community structure in the present study.

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Successional Variation in the Soil Microbial Community in Odaesan National Park, Korea

Sustainability ◽

10.3390/su12114795 ◽

2020 ◽

Vol 12 (11) ◽

pp. 4795 ◽

Cited By ~ 1

Author(s):

Hanbyul Lee ◽

Seung-Yoon Oh ◽

Young Min Lee ◽

Yeongseon Jang ◽

Seokyoon Jang ◽

...

Keyword(s):

Microbial Community ◽

Soil Properties ◽

Community Composition ◽

Forest Soils ◽

National Park ◽

Environmental Changes ◽

Forest Succession ◽

Microbial Community Composition ◽

Total Carbon ◽

Successional Stages

Succession is defined as variation in ecological communities caused by environmental changes. Environmental succession can be caused by rapid environmental changes, but in many cases, it is slowly caused by climate change or constant low-intensity disturbances. Odaesan National Park is a well-preserved forest located in the Taebaek mountain range in South Korea. The forest in this national park is progressing from a mixed-wood forest to a broad-leaved forest. In this study, microbial community composition was investigated using 454 sequencing of soil samples collected from 13 different locations in Odaesan National Park. We assessed whether microbial communities are affected by changes in environmental factors such as water content (WC), nutrient availability (total carbon (TC) and total nitrogen (TN)) and pH caused by forest succession. WC, TC, TN and pH significantly differed between the successional stages of the forest. The WC, TC and TN of the forest soils tended to increase as succession progressed, while pH tended to decrease. In both successional stages, the bacterial genus Pseudolabrys was the most abundant, followed by Afipia and Bradyrhizobium. In addition, the fungal genus Saitozyma showed the highest abundance in the forest soils. Microbial community composition changed according to forest successional stage and soil properties (WC, TC, TN, and pH). Furthermore, network analysis of both bacterial and fungal taxa revealed strong relationships of the microbial community depending on the soil properties affected by forest succession.

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