scholarly journals Plant species and soil type influence rhizosphere bacterial composition and seedling establishment on serpentine soils

2018 ◽  
Author(s):  
Alexandria N. Igwe ◽  
Rachel L. Vannette
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Microbial Communities ◽  
Plant Species ◽  
Soil Chemistry ◽  
Seedling Survival ◽  
Serpentine Soils ◽  
Bacterial Composition ◽  
Plant Phenotype ◽  
Community Source

AbstractRoot-associated microbial communities influence plant phenotype, growth and local abundance, yet the factors that structure these microbial communities are still poorly understood. California landscapes contain serpentine soils, which are nutrient-poor and high in heavy metals, and distinct from neighboring soils. Here, we surveyed the rhizoplane of serpentine-indifferent plants species growing on serpentine and non-serpentine soils to determine the relative influence of plant identity and soil chemistry on rhizoplane microbial community structure using 16S rRNA metabarcoding. Additionally, we experimentally examined if locally adapted microorganisms enhance plant growth in serpentine soil. Plant species, soil chemistry, and the interaction between them were important in structuring rhizoplane bacterial communities in both the field and experimental soils. In the experiment, rhizoplane microbial community source influenced seedling survival, but plant growth phenotypes measured were largely invariant to microbial community with a few exceptions. Results from the field sampling suggest that plant species associate with specific microbial communities even across chemically distinct soils, and that microbial communities can differentially influence seedling survival on harsh serpentine soils.

scholarly journals Plant phenology influences rhizosphere microbial community and is accelerated by serpentine microorganisms in Plantago erecta

2021 ◽  
Author(s):  
Alexandria N. Igwe ◽  
Bibi Quasem ◽  
Naomi Liu ◽  
Rachel L. Vannette
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Plant Development ◽  
Soil Chemistry ◽  
Bacterial Species ◽  
Bacterial Community Composition ◽  
Serpentine Soils ◽  
Microbe Interactions ◽  
And Function ◽  
Over Time

ABSTRACTSerpentine soils are drought-prone and rich in heavy metals, and plants growing on serpentine soils host distinct microbial communities that may affect plant survival and phenotype. However, whether the rhizosphere communities of plants from different soil chemistries are initially distinct or diverge over time may help us understand drivers of microbial community structure and function in stressful soils. Here, we test the hypothesis that rhizosphere microbial communities will converge over time (plant development), independent of soil chemistry and microbial source. We grew Plantago erecta in serpentine or nonserpentine soil, with serpentine or nonserpentine microbes and tracked plant growth and root phenotypes. We used 16S rRNA barcoding to compare bacterial species composition at seedling, vegetative, early-, and late-flowering phases. Plant phenotype and rhizosphere bacterial communities were mainly structured by soil type, with minor contributions by plant development, microbe source and their interactions. Serpentine microorganisms promoted early flowering in plants on non-serpentine soils. Despite strong effects of soil chemistry, the convergence in bacterial community composition across development demonstrates the importance of the plant-microbe interactions in shaping microbial assembly processes across soil types.

scholarly journals New Soil, Old Plants, and Ubiquitous Microbes: Evaluating the Potential of Incipient Basaltic Soil to Support Native Plant Growth and Influence Belowground Soil Microbial Community Composition

2018 ◽  
Author(s):  
Aditi Sengupta ◽  
Priyanka Kushwaha ◽  
Antonia Jim ◽  
Peter A. Troch ◽  
Raina Maier
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Community Composition ◽  
Plant Species ◽  
Soil Microbial Community ◽  
Soil Loss ◽  
Microbial Community Composition ◽  
Parent Material ◽  
Native Plant ◽  
Soil Microbial

The plant-microbe-soil nexus is critical in maintaining biogeochemical balance of the biosphere. However, soil loss and land degradation are occurring at alarmingly high rates, with soil loss exceeding soil formation rates. This necessitates evaluating marginal soils for their capacity to support and sustain plant growth. In a greenhouse study, we evaluated the capacity of marginal incipient basaltic parent material to support native plant growth, and the associated variation in soil microbial community dynamics. Three plant species, native to the Southwestern Arizona-Sonora region were tested with three soil treatments including basaltic parent material, parent material amended with 20% compost, and potting soil. The parent material with and without compost supported germination and growth of all the plant species, though germination was lower than the potting soil. A 16S rRNA amplicon sequencing approach showed Proteobacteria to be the most abundant phyla in both parent material and potting soil, followed by Actinobacteria. Microbial community composition had strong correlations with soil characteristics but not plant attributes within a given soil material. Predictive functional potential capacity of the communities revealed chemoheterotrophy as the most abundant metabolism within the parent material, while photoheterotrophy and anoxygenic photoautotrophy were prevalent in the potting soil. These results show that marginal incipient basaltic soil has the ability to support native plant species growth, and non-linear associations may exist between plant-marginal soil-microbial interactions.

scholarly journals Microbial Communities Show Parallels at Sites with Distinct Litter and Soil Characteristics

2011 ◽  
Vol 77 (21) ◽  
pp. 7560-7567 ◽  
Author(s):  
Marketa Sagova-Mareckova ◽  
Marek Omelka ◽  
Ladislav Cermak ◽  
Zdenek Kamenik ◽  
Jana Olsovska ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Community Composition ◽  
Soil Ph ◽  
Soil Chemistry ◽  
High Performance ◽  
Bacterial Community Composition ◽  
Microbial Community Composition ◽  
Carbon Sources ◽  
Soil Extracts

ABSTRACTPlant and microbial community composition in connection with soil chemistry determines soil nutrient cycling. The study aimed at demonstrating links between plant and microbial communities and soil chemistry occurring among and within four sites: two pine forests with contrasting soil pH and two grasslands of dissimilar soil chemistry and vegetation. Soil was characterized by C and N content, particle size, and profiles of low-molecular-weight compounds determined by high-performance liquid chromatography (HPLC) of soil extracts. Bacterial and actinobacterial community composition was assessed by terminal restriction fragment length polymorphism (T-RFLP) and cloning followed by sequencing. Abundances of bacteria, fungi, and actinobacteria were determined by quantitative PCR. In addition, a pool of secondary metabolites was estimated byermresistance genes coding for rRNA methyltransferases. The sites were characterized by a stable proportion of C/N within each site, while on a larger scale, the grasslands had a significantly lower C/N ratio than the forests. A Spearman's test showed that soil pH was correlated with bacterial community composition not only among sites but also within each site. Bacterial, actinobacterial, and fungal abundances were related to carbon sources while T-RFLP-assessed microbial community composition was correlated with the chemical environment represented by HPLC profiles. Actinobacteria community composition was the only studied microbial characteristic correlated to all measured factors. It was concluded that the microbial communities of our sites were influenced primarily not only by soil abiotic characteristics but also by dominant litter quality, particularly, by percentage of recalcitrant compounds.

scholarly journals Patterns in the Microbial Community of Salt-Tolerant Plants and the Functional Genes Associated with Salt Stress Alleviation

2021 ◽  
Author(s):  
Yanfen Zheng ◽  
Zongchang Xu ◽  
Haodong Liu ◽  
Yan Liu ◽  
Yanan Zhou ◽  
...  
Keyword(s):  
Salt Stress ◽  
Microbial Community ◽  
Plant Growth ◽  
Microbial Communities ◽  
Functional Genes ◽  
Genomic Information ◽  
Salt Tolerant ◽  
Comprehensive Understanding ◽  
Stress Alleviation ◽  
Tolerant Plants

Salinity is an important but little-studied abiotic stressor affecting plant growth. Although several previous reports have examined salt-tolerant plant microbial communities, we still lack a comprehensive understanding about the functional characteristics and genomic information of this population.

scholarly journals Spatial Diversity in Bacterial Communities across Barren and Vegetated, Native and Invasive, Coastal Dune Microhabitats

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 525
Author(s):  
Brianna L. Boss ◽  
Bianca R. Charbonneau ◽  
Javier A. Izquierdo
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Community Composition ◽  
Plant Species ◽  
Bacterial Communities ◽  
Environmental Gradients ◽  
Microbial Community Composition ◽  
Soil Microbial Communities ◽  
Spatial Diversity ◽  
Microbial Composition

The microbial community composition of coastal dunes can vary across environmental gradients, with the potential to impact erosion and deposition processes. In coastal foredunes, invasive plant species establishment can create and alter environmental gradients, thereby altering microbial communities and other ecogeomorphic processes with implications for storm response and management and conservation efforts. However, the mechanisms of these processes are poorly understood. To understand how changing microbial communities can alter these ecogeomorphic dynamics, one must first understand how soil microbial communities vary as a result of invasion. Towards this goal, bacterial communities were assessed spatially along foredune microhabitats, specifically in barren foredune toe and blowout microhabitats and in surrounding vegetated monocultures of native Ammophila breviligulata and invasive Carex kobomugi. Across dune microhabitats, microbial composition was more dissimilar in barren dune toe and blowout microhabitats than among the two plant species, but it did not appear that it would favor the establishment of one plant species over the other. However, the subtle differences between the microbial community composition of two species could ultimately aid in the success of the invasive species by reducing the proportions of bacterial genera associated exclusively with A. breviligulata. These results suggest that arrival time may be crucial in fostering microbiomes that would further the continued establishment and spread of either plant species.

Relationships between Arabidopsis genotype-specific biomass accumulation and associated soil microbial communities

Botany ◽  
2013 ◽  
Vol 91 (2) ◽  
pp. 123-126 ◽  
Author(s):  
Akifumi Sugiyama ◽  
Matthew G. Bakker ◽  
Dayakar V. Badri ◽  
Daniel K. Manter ◽  
Jorge M. Vivanco
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Growth Performance ◽  
Microbial Communities ◽  
Soil Microbial Communities ◽  
454 Sequencing ◽  
Biomass Accumulation ◽  
The United States ◽  
Natural Soil ◽  
Soil Microbial

Rhizosphere microbial communities are impacted by resident plant species and have reciprocal effects on their host plants. We collected resident soil from five wild populations of Arabidopsis in the United States and Europe in an effort to characterize the impacts of natural soil microbiomes on Arabidopsis growth performance. The microbial communities present in these soils showed differences in community structure as assessed by 454 sequencing and in metabolic activity. While pathogens associated with the Brassica family were rare, diverse genera of potential plant growth promoting rhizobacteria were detected. Seed corresponding to the five Arabidopsis genotypes was grown in resident and nonresident soils to determine relationships among plant growth performance and soil microbial community and edaphic characteristics. Arabidopsis genotypes demonstrated different patterns of relationship between biomass accumulation and microbial community characteristics. This work sheds light on the bacterial populations naturally associated with Arabidopsis and suggests implications of the rhizosphere microbiome for plant growth performance.

scholarly journals Wetland plant evolutionary history influences soil and endophyte microbial community composition

2020 ◽  
Author(s):  
Marisa B. Szubryt ◽  
Kelly Skinner ◽  
Edward J. O’Loughlin ◽  
Jason Koval ◽  
Stephanie M. Greenwald ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Community Composition ◽  
Plant Species ◽  
Evolutionary History ◽  
Microbial Community Composition ◽  
Methane Flux ◽  
Sample Type ◽  
Wetland Plant ◽  
Wetland Ecosystems

AbstractMethane is a microbially derived greenhouse gas whose emissions are highly variable throughout wetland ecosystems. Differences in plant community composition account for some of this variability, suggesting an influence of plant species on microbial community structure and function in these ecosystems. Given that closely related plant species have similar morphological and biochemical features, we hypothesize that plant evolutionary history is related to differences in microbial community composition. To examine species-specific patterns in microbiomes, we selected five monoculture-forming wetland plant species based on the evolutionary distances among them. We detected significant differences in microbial communities between sample types (unvegetated soil, bulk soil, rhizosphere soil, internal root tissues, and internal leaf tissues) associated with these plant species based on 16S relative abundances. We additionally found that differences in plant evolutionary history were correlated with variation in microbial communities across plant species within each sample type. Using qPCR, we observed substantial differences in overall methanogen and methanotroph population sizes between plant species and sample types. Methanogens tended to be most abundant in rhizosphere soils while methanotrophs were the most abundant in roots. Given that microbes influence methane flux and that plants affect methanogen and methanotroph populations, plant species contribute to variable degrees of methane emissions. Incorporating the influence of plant evolutionary history into future modeling efforts may improve predictions of wetland methane emission since microbial community differences correlate with differences in plant evolutionary history.

Land use types influence soil microbial community through effects on soil properties in the dry-hot valley region in southwestern China

2021 ◽  
Author(s):  
Taicong Liu ◽  
Li Rong ◽  
Xingwu Duan ◽  
Zhe Chen
Keyword(s):  
Land Use ◽  
Microbial Community ◽  
Soil Properties ◽  
Microbial Communities ◽  
Indirect Effects ◽  
Structural Equation ◽  
Equation Model ◽  
Land Uses ◽  
Bacterial Composition ◽  
Soil Microbial

<p><strong>Abstract</strong>: Land use is one of the most important forms in agricultural production. Non-appropriate land use can cause deterioration of physical, chemical and biological properties of soil, thus affecting sustainable agriculture. Earlier reports showed that land use drastically altered microbial community composition. However, the mechanism of land use on microbial communities is still not fully understood. In the present study, we focus on the dry hot valley, characterized by high temperature and low humility, to test whether soil properties from four primary land uses including the land conversion from farmland (SLC), sugarcane land (SL), maize land with conventional tillage (CT) and bare land (BL) have different influences on soil microbial communities. The results showed that land uses altered bacterial and fungal community composition. In SL and BL, we found the respective absence of a kind of fungi at phylum the level. The abundances of several bacterial phyla in SL such as Gemmatimonadets and Acidobacteria associated with promoting mineralization were higher than that in other land uses. RDA indicated that bacterial communities were influenced by soil total nitrogen, total organic carbon and available potassium contents, and fungal communities were dominated by available potassium contents. SEM (structural equation model) showed that land use has direct and indirect effects on bacterial composition, while only indirect effects on fungal by land use. Land use indirectly affected bacterial composition through effects on soil moisture, clay and available potassium contents, whereas through effects on clay and available potassium for fungal composition. Land use exhibited greater impacts on bacterial composition than fungal composition, implying bacteria was more sensitive to land use changes compared to fungi in the dry-hot valley. Considering the low level of total potassium in soil under SL and CT, elevated potassium fertilizer would be a beneficial pathway to improve soil microbial composition and soil nutrients in the dry hot valley.</p><p><strong>Key word</strong>: Land use, Soil microbial community, Dry-hot valley, Soil properties, Structural equation model.</p>

Phytoremediation of landfill leachate in constructed wetland

2019 ◽  
pp. 441-446
Author(s):  
Jaak Truu ◽  
Jaanis Juhanson ◽  
Mait Kriipsalu ◽  
Marit Seene
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Plant Species ◽  
Landfill Leachate ◽  
Water Samples ◽  
Free Water ◽  
Vegetation Period ◽  
Quality Of Water ◽  
Remediation Plan ◽  
The Impact

The integrated remediation plan of the Laguja landfill, Estonia, includes creation of aconstructed wetland for treatment of landfill leachate. A mesocosm experiment wasconducted in order to estimate the impact of different plant species on purification efficiencyof wetland. The quality of water in mesocosms was monitored during vegetation period. Allplant treatments enhanced reduction of organic matter (BOD: 87-96%, COD: ca 30%, TOC:ca 50%) as well as ammonia and total nitrogen in water compared to unplanted control.Presence of plants enhanced biodegradative bacterial abundance and activity as well asmetabolic diversity of microbial community in water. Water samples from all plant treatmentswere characterized by distinct microbial communities as revealed by molecular fingerprintingtechniques. Most different from the rest of microbial communities were water samples frommesocosm with plants on floating mats. Our results show that in free-water constructedwetlands with vegetation the purification efficiency is not dependent on plant species, whilestructure of water microbial community differs due to plant species.

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