No robust multispecies coexistence in a canonical model of plant–soil feedbacks

Ecology Letters, Journal Year: 2022, Volume and Issue: 25(7), P. 1690 - 1698

Published: May 30, 2022

Plant-soil feedbacks (PSFs) are considered a key mechanism generating frequency-dependent dynamics in plant communities. Negative feedbacks, particular, often invoked to explain coexistence and the maintenance of diversity species-rich However, primary modelling framework used study PSFs considers only two species, we lack clear theoretical expectations for how these complex interactions play out communities with natural levels diversity. Here, extend this canonical model include an arbitrary number species analyse dynamics. Surprisingly, find that more than is virtually impossible, suggesting alternative frameworks needed describe observed diverse Drawing on our analysis, discuss future directions PSF models implications experimental PSF-mediated field.

Language: Английский

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Mycorrhizal nutrient acquisition strategies shape tree competition and coexistence dynamics

Journal of Ecology, Journal Year: 2022, Volume and Issue: 111(3), P. 564 - 577

Published: Nov. 21, 2022

Abstract Mycorrhizal fungi with different nutrient acquisition strategies influence plant species performance and physiology, thereby defining their trophic niche. This might drive resource competition dynamics that cumulatively impact tree coexistence, but few manipulative experiments have directly tested this. Combining surveys in a modern coexistence theory framework, we how variation mycorrhizal conditions affects competitive outcomes. We focused on two genera of co‐occurring states: Acer (arbuscular mycorrhizal, AM) Populus (dual often considered predominantly ectomycorrhizal, EM). The EM AM fungal responsiveness varied latitude nitrogen (N) limitation. Host‐specific soil microbiome conditioning inorganic N fertilization combined to qualitatively affect Lower favoured over trees, reversed this outcome for southern species, aligning regional‐scale forest transitions. Results from the experiment also predict exclusion between pairs, which could arise, part, differences is consistent alternative stable states dominant strategies. Such bistability appears natural systems as bimodal distribution vs. dominance using long‐term inventory data. Synthesis : magnitude microbially mediated depends availability, likely relates differentiation. These findings support importance symbioses contributing large‐scale biogeographical patterns niche separation across gradients structure.

Language: Английский

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Plant-microbiome interactions under drought—insights from the molecular machinist’s toolbox

Frontiers in Sustainable Food Systems, Journal Year: 2023, Volume and Issue: 7

Published: Nov. 16, 2023

Plants face numerous challenges in novel and harsh environments, including altered precipitation regimes, salinity, extreme temperatures, increased atmospheric CO 2 , nutrient deficiency, heavy metals, oxygen. Drought remains a major constraint to crop productivity meeting food demand, with the frequency, intensity, duration of drought expected raise coming century. The “cry for help” hypothesis proposes that timely recruiting microbiome by plants may confer benefits stress alleviation, plant growth, fitness, health. root-associated harbors 10–100 times more functional genes than host, which can significantly stimulate metabolic genetic potential plant–microbiome assembly. However, cross-talk among microbes, host-plant, is less well understood. Understanding molecular aspect multiple mechanisms microbes associate during fundamental importance biology agriculture. In this review, we examine progress research on response its assemblages interactions stress, impact root exudates host resilience. We delve into ‘omics’ technologies unravel signaling networks underlying these multiway occur associated microbiome. then discuss shortfalls, challenges, future directions field. Overall, argue harnessing/manipulating presents promising strategy improving agricultural systems global climate change.

Language: Английский

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Can plants build their niche through modulation of soil microbial activities linked with nitrogen cycling? A test with Arabidopsis thaliana

New Phytologist, Journal Year: 2024, Volume and Issue: 243(2), P. 620 - 635

Published: May 29, 2024

Summary In natural systems, different plant species have been shown to modulate specific nitrogen (N) cycling processes so as meet their N demand, thereby potentially influencing own niche. This phenomenon might go beyond interactions with symbiotic microorganisms and affect the much less explored free‐living involved in soil cycling, such nitrifiers denitrifiers. Here, we investigated variability modulation of nitrifying denitrifying enzyme activities (NEA DEA, respectively), ratio : DEA), across 193 Arabidopsis thaliana accessions. We studied genetic environmental determinants plant–soil interactions, effects on biomass production next generation. found that NEA, NEA DEA varied c. 30‐, 15‐ 60‐fold, respectively, among A. genotypes were related genes linked stress response, flowering, nitrate nutrition, well parameters at geographic origin analysed genotypes. Moreover, plant‐mediated correlated aboveground next‐generation plants home vs away nonautoclaved soil, suggesting a transgenerational impact biotic conditioning performance. Altogether, these findings suggest nutrient‐based niche construction may be more widespread than previously thought.

Language: Английский

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Towards defining the core Saccharum microbiome: input from five genotypes

BMC Microbiology, Journal Year: 2022, Volume and Issue: 22(1)

Published: Aug. 8, 2022

Abstract Background Plant microbiome and its manipulation inaugurate a new era for plant biotechnology with the potential to benefit sustainable crop production. Here, we used large-scale 16S rDNA sequencing analysis unravel dynamic, structure, composition of exophytic endophytic microbial communities in two hybrid commercial cultivars sugarcane (R570 SP80–3280), cultivated genotypes ( Saccharum officinarum barberi ) one wild species spontaneum ). Results Our identified 1372 amplicon sequence variants (ASVs). The communities’ profiles are grouped by two, root bulk soils stem leave when these four components compared. However, PCoA-based data supports that endophytes epiphytes form distinct groups, revealing an active host-derived mechanism select resident microbiota. A strong genotype-influence on assembly ssp. is documented. total 220 ASVs persisted across species. ubiquitous bacteria beneficial bacteria, Acinetobacter ssp., Serratia symbiotica . Conclusions results presented support existence common cultivar-specific hybrids, canes tissues (leaves, stems, roots). Also, evidence provided under experimental conditions described here, each genotype bears community little impact from soil conditions, except system. It remains be demonstrated which aspect, genotype, environment or both, has most significant selection fields.

Language: Английский

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Mechanistic approaches to investigate soil microbe‐mediated plant competition

Journal of Ecology, Journal Year: 2023, Volume and Issue: 111(8), P. 1590 - 1597

Published: July 3, 2023

Abstract Interactions between plants and soil microbes can influence plant population dynamics diversity in communities. Traditional theoretical paradigms view the microbial community as a black box with net effects described by phenomenological models. This approach struggles to quantify importance of plant–microbe interactions relative other competition coexistence mechanisms explain context dependence microbe effects. We argue that mechanistic framework focused on functional groups will lead conceptual empirical advances, demonstrated extending resource ratio theory interactions. review diverse pathways which different competition. Finally, we suggest approaches link observations measure key parameters our framework. Synthesis : Our highlights recent experimental advancements for uncovering alter host coexistence. synthesize these into model provides future experiments investigate structuring populations

Language: Английский

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Fungal community dissimilarity predicts plant–soil feedback strength in a lowland tropical forest

Ecology, Journal Year: 2023, Volume and Issue: 105(1)

Published: Oct. 28, 2023

Soil microbes impact plant community structure and diversity through plant-soil feedbacks. However, linking the relative abundance of pathogens mutualists to differential recruitment remains challenging. Here, we tested for microbial mediation pairwise feedback using a reciprocal transplant experiment in lowland tropical forest Panama paired with amplicon sequencing soil roots. We found evidence that species identity alters community, these changes composition alter subsequent growth survival conspecific plants. also greater dissimilarity between their arbuscular mycorrhizal nonpathogenic fungi predicted increased positive feedback. Finally, identified specific taxa across our target functional groups differentially accumulated under settings. Collectively, findings clarify how mediate net effects on recruitment, implications management restoration.

Language: Английский

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A strategic model of a host–microbe–microbe system reveals the importance of a joint host–microbe immune response to combat stress-induced gut dysbiosis

Frontiers in Microbiology, Journal Year: 2022, Volume and Issue: 13

Published: Aug. 4, 2022

Microbiomes provide key ecological functions to their host; however, most host-associated microbiomes are too complicated allow a model of essential host–microbe–microbe interactions. The intestinal microbiota salmonids may offer solution since few dominating species often characterize it. Healthy fish coexist with mutualistic Mycoplasma sp. species, while stress allows the spread pathogenic strains, such as Aliivibrio Even after skin infection, does not recover; remains dominant or – coexistence was occasionally observed. We devised involving interactions among host immune system, plus toxin-producing pathogen. Our embraces complete community and is in harmony experimental results that host– mutualism prevents pathogens. Contrary, suppresses system allowing dominance pathogens, recover disappears.

Language: Английский

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A general approach for quantifying microbial effects on plant competition

Plant and Soil, Journal Year: 2022, Volume and Issue: 485(1-2), P. 57 - 70

Published: Oct. 26, 2022

Language: Английский

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A conceptual framework for host‐associated microbiomes of hybrid organisms

Methods in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 15(3), P. 511 - 529

Published: Jan. 30, 2024

Abstract Hybridization between organisms from evolutionarily distinct lineages can have profound consequences on organismal ecology, with cascading effects fitness and evolution. Most studies of hybrid focused traits, for example, various aspects morphology physiology. However, the recent emergence holobiont theory, there has been growing interest in understanding how hybridization impacts is impacted by host‐associated microbiomes. Better interplay host microbiomes potential to provide insight into both roles as dictators performance well fundamental rules governing microbiome assembly. Unfortunately, a current lack frameworks structure organisms. In this paper, we develop four conceptual models describing possible relationships hybrids their progenitor or ‘parent’ taxa. We then integrate these quantitative ‘4H index’ present new R package calculation, visualization analysis index. demonstrate 4H index be used compare across disparate plant animal systems. Our analyses data sets show variation systems based taxonomy, site microbial taxonomic group. models, paired our associated tools, facilitate comparison This, turn, allows systematic exploration different impact

Language: Английский

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