Exploring the roles of microbes in facilitating plant adaptation to climate change

Barnes, Elle M.; Tringe, Susannah G.

doi:10.1042/bcj20210793

Cited by 9 publications

(3 citation statements)

References 88 publications

(71 reference statements)

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“…Due to this research's focus on the effects of each treatment on evaporation dynamics in the absence of other mediating factors, these results do not account for the impacts of plantmicrobe or microbe-microbe interactions on plants' ability to tolerate drought stress (Barnes and Tringe, 2022). However, in isolating the impact of Surfactin and B. subtilis, these results facilitate understanding of higher-order processes in the microbiome by highlighting a mechanism by which surfactant-producing microbes affect soil moisture conditions.…”

Section: Loammentioning

confidence: 96%

Investigating a microbial approach to water conservation: Effects of Bacillus subtilis and Surfactin on evaporation dynamics in loam and sandy loam soils

Gutierrez

Cameron-Harp²,

Chakraborty³

et al. 2022

Front. Sustain. Food Syst.

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Semi-arid regions faced with increasingly scarce freshwater resources must manage competing demands in the food-energy-water nexus. A possible solution modifies soil hydrologic properties using biosurfactants to reduce evaporation and improve water retention. In this study, two different soil textures representative of agricultural soils in Kansas were treated with a direct application of the biosurfactant, Surfactin, and an indirect application via inoculation of Bacillus subtilis. Evaporation rates of the wetted soils were measured when exposed to artificial sunlight (1000 W/m2) and compared to non-treated control soils. Experimental results indicate that both treatments alter soil moisture dynamics by increasing evaporation rates by when soil moisture is plentiful (i.e., constant rate period) and decreasing evaporation rates by when moisture is scarce (i.e., slower rate period). Furthermore, both treatments significantly reduced the soil moisture content at which the soil transitioned from constant rate to slower rate evaporation. Out of the two treatments, inoculation with B. subtilis generally produced greater changes in evaporation dynamics; for example, the treatment with B. subtilis in sandy loam soils increased constant rate periods of evaporation by 43% and decreased slower rate evaporation by 49%. In comparing the two soil textures, the sandy loam soil exhibited a larger treatment effect than the loam soil. To evaluate the potential significance of the treatment effects, a System Dynamics Model operationalized the evaporation rate results and simulated soil moisture dynamics under typical daily precipitation conditions. The results from this model indicate both treatment methods significantly altered soil moisture dynamics in the sandy loam soils and increased the probability of the soil exhibiting constant rate evaporation relative to the control soils. Overall, these findings suggest that the decrease in soil moisture threshold observed in the experimental setting could increase soil moisture availability by prolonging the constant rate stage of evaporation. As inoculation with B. subtilis in the sandy loam soil had the most pronounced effects in both the experimental and simulated contexts, future work should focus on testing this treatment in field trials with similar soil textures.

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Section: Loammentioning

confidence: 96%

Investigating a microbial approach to water conservation: Effects of Bacillus subtilis and Surfactin on evaporation dynamics in loam and sandy loam soils

Gutierrez

Cameron-Harp²,

Chakraborty³

et al. 2022

Front. Sustain. Food Syst.

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“…However, little attention has been given to microbial adaptation [ 3 ]. Although microorganisms tend to adapt rapidly to changing environmental conditions [ 4 ], little is known about how these changes will feed back into plant–microbe interactions [ 5 ]. The overall effects of plant-associated microbes on host health and fitness are determined by a number of factors, including host and microbial genotypes, interactions within microbiota, and various abiotic factors [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Principal Drivers of Fungal Communities Associated with Needles, Shoots, Roots and Adjacent Soil of Pinus sylvestris

Marčiulynienė

Marčiulynas

Mischerikova

et al. 2022

JoF

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The plant- and soil-associated microbial communities are critical to plant health and their resilience to stressors, such as drought, pathogens, and pest outbreaks. A better understanding of the structure of microbial communities and how they are affected by different environmental factors is needed to predict and manage ecosystem responses to climate change. In this study, we carried out a country-wide analysis of fungal communities associated with Pinus sylvestris growing under different environmental conditions. Needle, shoot, root, mineral, and organic soil samples were collected at 30 sites. By interconnecting the high-throughput sequencing data, environmental variables, and soil chemical properties, we were able to identify key factors that drive the diversity and composition of fungal communities associated with P. sylvestris. The fungal species richness and community composition were also found to be highly dependent on the site and the substrate they colonize. The results demonstrated that different functional tissues and the rhizosphere soil of P. sylvestris are associated with diverse fungal communities, which are driven by a combination of climatic (temperature and precipitation) and edaphic factors (soil pH), and stand characteristics.

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“…An example of microbial competition affecting plant traits is found in the metabolites produced by microbes. Secondary metabolites associated with microbial competition such as siderophores may play a role in plant disease resistance (Barnes and Tringe 2022) and therefore alter plant stress responses. While many microbial secondary metabolites promote plant growth, the negative effects of pathogenic microbes on plant traits have been well documented (Pang et al 2021).…”

Section: Reinoculationmentioning

confidence: 99%

Species And Community Controls On Ecosystem Carbon Cycling: Do Plant Interaction Traits Influence Ecosystem Productivity?

Veenendaal¹

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<p>As biodiversity is heavily altered by human influence, the need to understand how biodiversity impacts ecosystem productivity is increasingly important. Host plant and arbuscular mycorrhizal fungi (AMF) interaction specificity is a relatively new topic that may facilitate the understanding of the mechanisms behind carbon cycling. AMF interaction traits have been assigned to host plants based on the number of AMF taxa they associate with. Interaction specialists are AMF host plants that associate with few AMF taxa while interaction generalists associate with many taxa. In this study I hypothesised that interaction specialists increase ecosystem productivity due to niche complementarity of AMF interaction partners relative to an interaction generalist especially at high species richness. My study investigates the addition of a late arrival with a defined interaction trait into plant communities with three species richness levels. Soil sterilisation and reinoculation treatment are also included to control for niche partitioning based on AMF interaction partners. I also hypothesised that increasing species richness has a positive effect on productivity while soil sterilisation reduces productivity and soil reinoculation partially restores this lost productivity. The community responses of primary productivity (GPP), ecosystem respiration (ER), net ecosystem exchange (NEE), aboveground plant biomass, belowground plant biomass, leaf area index (LAI), and specific leaf area (SLA) were measured. Community productivity responses to interaction traits did not covary with species richness or soil treatment, so the effect of species richness, soil treatment, and interaction trait were analysed separately. Increasing species richness resulted in increasing productivity as expected, but the pattern of carbon cycling shifted from carbon storage as plant biomass to soil microbial processes. While the rate of carbon drawdown or potential productivity increased, biomass decreased at high species richness. Soil sterilisation likewise resulted in greater carbon drawdown which was opposite to what was expected but decreased ER and plant biomass. Reinoculation of soil restored plant biomass, but negatively affected both carbon flux (GPP & ER) and plant traits (LAI & SLA). The addition of one interaction generalist (Plantago lanceolata) decreased total community aboveground biomass which indicates that interaction trait can be used to predict the direction of community response. The direction of the productivity responses can be partially explained by the P limitation of the mesocosms and the role of the soil microbial community in carbon cycling. By quantifying a diverse range of carbon pools, my study contributes to the understanding of complex carbon allocation processes that control ecosystem productivity responses and provides important insights for the context-dependence of selecting and analysing of productivity measures of whole ecosystems.</p>

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Exploring the roles of microbes in facilitating plant adaptation to climate change

Cited by 9 publications

References 88 publications

Investigating a microbial approach to water conservation: Effects of Bacillus subtilis and Surfactin on evaporation dynamics in loam and sandy loam soils

Investigating a microbial approach to water conservation: Effects of Bacillus subtilis and Surfactin on evaporation dynamics in loam and sandy loam soils

Principal Drivers of Fungal Communities Associated with Needles, Shoots, Roots and Adjacent Soil of Pinus sylvestris

Species And Community Controls On Ecosystem Carbon Cycling: Do Plant Interaction Traits Influence Ecosystem Productivity?

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