Effects of soil moisture and plant interactions on the soil microbial community structure

Chen, M.-M.; Zhu, Yan; Su, Yan; Chen, B.-D.; Fu, Bojie; Marschner, Petra

doi:10.1016/j.ejsobi.2006.05.001

Cited by 106 publications

(52 citation statements)

References 33 publications

(27 reference statements)

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“…For example, researchers have found that changes in CO 2 do not predictably alter microbial biomass (35,62). Similarly, changes in soil moisture and ecosystem warming do not always lead to predictable or significant changes in bacterial and fungal abundance (8,19,29,58). Previous reports in this site have shown a response of some plants to a warming effect, in particular Solidago and Andropogon, with some other plant productivity being reduced; however, the response is complicated by time of sampling (15).…”

Section: Discussionmentioning

confidence: 92%

“…For example, the response of soil microbial communities to changes in atmospheric CO 2 concentrations can be positive or negative, and consistent overall trends between sites and studies have not been observed (1,28,(34)(35)(36). Further, depending on what limits ecosystem productivity, precipitation and soil moisture changes may increase or decrease the ratio of bacteria and fungi, as well as shift their community composition (8,50,58). Increasing temperatures can increase in microbial activity, processing, and turnover, causing the microbial community to shift in favor of representatives adapted to higher temperatures and faster growth rates (7,46,60,64,65).…”

mentioning

confidence: 99%

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Soil Microbial Community Responses to Multiple Experimental Climate Change Drivers

Castro

Classen

Austin

et al. 2010

Appl Environ Microbiol

667

381

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Researchers agree that climate change factors such as rising atmospheric [CO 2 ] and warming will likely interact to modify ecosystem properties and processes. However, the response of the microbial communities that regulate ecosystem processes is less predictable. We measured the direct and interactive effects of climatic change on soil fungal and bacterial communities (abundance and composition) in a multifactor climate change experiment that exposed a constructed old-field ecosystem to different atmospheric CO 2 concentration (ambient, ؉300 ppm), temperature (ambient, ؉3°C), and precipitation (wet and dry) might interact to alter soil bacterial and fungal abundance and community structure in an old-field ecosystem. We found that (i) fungal abundance increased in warmed treatments; (ii) bacterial abundance increased in warmed plots with elevated atmospheric [CO 2 ] but decreased in warmed plots under ambient atmospheric [CO 2 ]; (iii) the phylogenetic distribution of bacterial and fungal clones and their relative abundance varied among treatments, as indicated by changes in 16S rRNA and 28S rRNA genes; (iv) changes in precipitation altered the relative abundance of Proteobacteria and Acidobacteria, where Acidobacteria decreased with a concomitant increase in the Proteobacteria in wet relative to dry treatments; and (v) changes in precipitation altered fungal community composition, primarily through lineage specific changes within a recently discovered group known as soil clone group I. Taken together, our results indicate that climate change drivers and their interactions may cause changes in bacterial and fungal overall abundance; however, changes in precipitation tended to have a much greater effect on the community composition. These results illustrate the potential for complex community changes in terrestrial ecosystems under climate change scenarios that alter multiple factors simultaneously.

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Section: Discussionmentioning

confidence: 92%

mentioning

confidence: 99%

Soil Microbial Community Responses to Multiple Experimental Climate Change Drivers

Castro

Classen

Austin

et al. 2010

Appl Environ Microbiol

667

381

View full text Add to dashboard Cite

show abstract

“…We focus on drought because: (i) the frequency and duration of drought is expected to increase in the future for many parts of the world (IPCC 4th Assessment, 2007), (ii) belowground microbial communities are sensitive to soil moisture conditions [24,25], and (iii) drought is a strong selective pressure that may drive rapid evolutionary responses in plant populations [26]. We use data from a multigenerational experiment that manipulated the soil moisture environment.…”

Section: Introductionmentioning

confidence: 99%

The relative importance of rapid evolution for plant-microbe interactions depends on ecological context

2014

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Evolution can occur on ecological time-scales, affecting community and ecosystem processes. However, the importance of evolutionary change relative to ecological processes remains largely unknown. Here, we analyse data from a long-term experiment in which we allowed plant populations to evolve for three generations in dry or wet soils and used a reciprocal transplant to compare the ecological effect of drought and the effect of plant evolutionary responses to drought on soil microbial communities and nutrient availability. Plants that evolved under drought tended to support higher bacterial and fungal richness, and increased fungal : bacterial ratios in the soil. Overall, the magnitudes of ecological and evolutionary effects on microbial communities were similar; however, the strength and direction of these effects depended on the context in which they were measured. For example, plants that evolved in dry environments increased bacterial abundance in dry contemporary environments, but decreased bacterial abundance in wet contemporary environments. Our results suggest that interactions between recent evolutionary history and ecological context affect both the direction and magnitude of plant effects on soil microbes. Consequently, an eco-evolutionary perspective is required to fully understand plant-microbe interactions.

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“…the use of PCR-DGGE profiling has proven to be a powerful tool in assessing community structure differences in soils (11,33).…”

Section: Band Blast Search Acess Numbermentioning

confidence: 99%

Structure and composition of bacterial and fungal community in soil under soybean monoculture in the Brazilian Cerrado

Bresolin¹,

Bustamante²,

Krüger³

et al. 2010

Braz. J. Microbiol.

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Soybean is the most important oilseed cultivated in the world and Brazil is the second major producer.Expansion of soybean cultivation has direct and indirect impacts on natural habitats of high conservation value, such as the Brazilian savannas (Cerrado). In addition to deforestation, land conversion includes the use of fertilizers and pesticides and can lead to changes in the soil microbial communities. This study evaluated the soil bacterial and fungal communities and the microbial biomass C in a native Cerrado and in a similar no-tillage soybean monoculture area using PCR-DGGE and sequencing of bands. Compared to the native area, microbial biomass C was lower in the soybean area and cluster analysis indicated that the structure of soil microbial communities differed. 16S and 18S rDNA dendrograms analysis did not show differences between row and inter-row samples, but microbial biomass C values were higher in inter-rows during soybean fructification and harvest. The study pointed to different responses and alterations in bacterial and fungal communities due to soil cover changes (fallow x growth period) and crop development. These changes might be related to differences in the pattern of root exudates affecting the soil microbial community. Among the bands chosen for sequencing there was a predominance of actinobacteria, -proteobacteria and ascomycetous divisions. Even under no-tillage management methods, the soil microbial community was affected due to changes in the soil cover and crop development, hence warning of the impacts caused by changes in land use.

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Effects of soil moisture and plant interactions on the soil microbial community structure

Cited by 106 publications

References 33 publications

Soil Microbial Community Responses to Multiple Experimental Climate Change Drivers

Soil Microbial Community Responses to Multiple Experimental Climate Change Drivers

The relative importance of rapid evolution for plant-microbe interactions depends on ecological context

Structure and composition of bacterial and fungal community in soil under soybean monoculture in the Brazilian Cerrado

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