Former Land Use and Host Genotype Influence the Mycorrhizal Colonization of Poplar Roots

Gherghel, Felicia; Behringer, David; Haubrich, Stefanie; Schlauß, Maren; Fey-Wagner, Christina; Rexer, Karl‐Heinz; Janßen, Alwin; Kost, Gerhard

doi:10.3390/f5122980

Cited by 7 publications

(8 citation statements)

References 29 publications

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“…Similar to the total species richness estimates, diversity estimates based on the Shannon index of AM fungi (Honnay et al 2017), ECM fungi and total fungi were found to decrease significantly with land use intensification (Gherghel et al 2014). The comparison of perennial cropland sites with the secondary forest and fallow land showed a lower value of the Shannon diversity index of AM fungi for cropland (Snoeck et al 2010).…”

Section: Species Richness and Diversitysupporting

confidence: 61%

“…For instance, during the conversion of forested areas to cropland, or to perennial cropland and fallow land (Tchabi et al 2008), a reduction in the AM fungal richness was found. Likewise, when analyzing ECM fungal richness in roots of poplar plants in different land use (former cropland, former grassland, and former spruce stand), lower ECM fungal richness was found in former cropland sites compared to that found in the former spruce forest or former grassland (Gherghel et al 2014). Although a decrease in species/OTUs richness values were common after increasing land use intensity, some contrasting results were also observed.…”

Section: Species Richness and Diversitymentioning

confidence: 89%

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Soil fungal communities across land use types

Balami¹,

Vašutová²,

Godbold³

et al. 2020

iForest

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Biogeosciences and Forestry Biogeosciences and Forestry Soil fungal communities across land use types Sujan Balami (1) , Martina Vašutová (1-2) , Douglas Godbold (2-3) , Petr Kotas (4) , Pavel Cudlín (2) Land use change is one of the major causes of biodiversity loss, mostly due to habitat change and fragmentation. Belowground fungal diversity is very important in terrestrial ecosystems, however, the effect of land use change on soil fungal community is poorly understood. In this review, a total of 190 studies worldwide were analyzed. To monitor the effect of land use change, different fungal parameters such as richness, diversity, community composition, root colonization by arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) fungi, spore density, ergosterol, and phospholipid fatty acid (PLFA) content and AM fungal glomalin related soil protein (GRSP) were studied. In general, results from analyzed studies often showed a negative response of fungal quantitative parameters after land use change from less-intensive site management to intensive site management. Land use change mostly showed significant shifts in fungal community composition. Considering land use change types, only 18 out of 91 land use change types were included in more than 10 studies, conversion of primary and secondary forest to various, more intensive land use was most often represented. All these 18 types of land use change influenced fungal community composition, however, the effects on quantitative parameters were mostly inconsistent. Current knowledge is not sufficient to conclude general land use impacts on soil fungi as the reviewed studies are fragmented and limited by the local context of land use change. Unification of the methodology, detailed descriptions of environmental factors, more reference sequences in public databases, and especially data on ecology and quantitative parameters of key fungal species would significantly improve the understanding of this issue.

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Section: Species Richness and Diversitysupporting

confidence: 61%

Section: Species Richness and Diversitymentioning

confidence: 89%

Soil fungal communities across land use types

Balami¹,

Vašutová²,

Godbold³

et al. 2020

iForest

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“…On lower fertility sites, it may be advantageous for poplars to allocate more belowground biomass to build a larger coarse root system for storage purposes. Stored carbohydrates and amino acids in roots could then be used locally, and in timely fashion, to sustain a higher level of fine root growth, symbiotic associations with fungi [80,81] and root exudation [82,83]. These three processes have an increasing importance for nutrient capture as site fertility decreases [84][85][86].…”

Section: Discussionmentioning

confidence: 99%

Plastic Allometry in Coarse Root Biomass of Mature Hybrid Poplar Plantations

et al. 2015

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In this study, we sampled coarse root biomass of three poplar clones in four 13-year-old hybrid poplar (Populus spp.) plantations, with the objective of developing an allometric relationship between diameter at breast height (DBH) and coarse root biomass. A second objective was to test significance of site, clone and ×site clone interaction effects on coarse root biomass, using analysis of covariance (ANCOVA), with DBH as a covariate. Across the four sites, the general allometric relationship between DBH and coarse root biomass was highly significant (R 2 =0.78, p<0.001). However, given the high significance of the site effect (p< 0.001) in the ANCOVA and the differences in data distribution between sites, two allometric relationships were developed based on the fertility class of sites (high and moderate). Environmentspecific allometric relationships developed for two site fertility classes had a better fit (R 2 =0.81-0.90, p<0.001). ANCOVA, with DBH as a covariate and site fertility class as a main effect, also showed that both of these variables significantly affected (p <0.001) coarse root biomass allocation. Environmentspecific equations showed that higher coarse root biomass was allocated in harsher environments for a given DBH, probably to improve access to growth limiting soil nutrients or to build-up larger storage sites for amino acids and non-structural carbohydrates. Consequently, poplar coarse root biomass growth is both driven by ontogeny (size) and environment, reflecting the plasticity of the root system of mature poplars. Implications of using general vs. environment-specific equations in estimating stand-level root biomass and shoot to root ratios are discussed. Shoot to root ratios calculated using environment-specific equations were more strongly correlated to key environmental variables than ratios calculated using the general equation, with soil NO 3 supply rate being the strongest predictor of the ratio (R 2 =0.90, p<0.001).

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“…The microbiome composition in plant tissues can be genotype-dependent and significantly different from the microbiome composition in the rhizosphere [1,3,17,19]. The role of plant genotypes in shaping the biomass and community structure of the mycorrhizal part of the microbial community has also been reported by Corredor et al [20], Gehring et al [21], Gherghel et al [22], Karliński et al [23,24], and Tagu et al [25]. Most of these findings indicate that tree genotype affects the process of recruitment of ectomycorrhizal fungi in the soil by influencing both the quantities of organic compounds released from the roots and the profiles of root exudates [26].…”

Section: Introductionmentioning

confidence: 89%

Soil Microbial Biomass and Community Composition Relates to Poplar Genotypes and Environmental Conditions

Karliński

Ravnskov

Rudawska

2020

Forests

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Poplars, known for their diversity, are trees that can develop symbiotic relationships with several groups of microorganisms. The genetic diversity of poplars and different abiotic factors influence the properties of the soil and may shape microbial communities. Our study aimed to analyse the impact of poplar genotype on the biomass and community composition of the microbiome of four poplar genotypes grown under different soil conditions and soil depths. Of the three study sites, established in the mid-1990s, one was near a copper smelter, whereas the two others were situated in unpolluted regions, but were differentiated according to the physicochemical traits of the soil. The whole-cell fatty acid analysis was used to determine the biomass and proportions of gram-positive, gram-negative and actinobacteria, arbuscular fungi (AMF), other soil fungi, and protozoa in the whole microbial community in the soil. The results showed that the biomass of microorganisms and their contributions to the community of organisms in the soil close to poplar roots were determined by both factors: the tree-host genotype and the soil environment. However, each group of microorganisms was influenced by these factors to a different degree. In general, the site effect played the main role in shaping the microbial biomass (excluding actinobacteria), whereas tree genotype determined the proportions of the fungal and bacterial groups in the microbial communities and the proportion of AMF in the fungal community. Bacterial biomass was influenced more by site factors, whereas fungal biomass more by tree genotype. With increasing soil depth, a decrease in the biomass of all microorganisms was observed; however, the proportions of the different microorganisms within the soil profile were the result of interactions between the host genotype and soil conditions. Despite the predominant impact of soil conditions, our results showed the important role of poplar genotype in shaping microorganism communities in the soil.

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Former Land Use and Host Genotype Influence the Mycorrhizal Colonization of Poplar Roots

Cited by 7 publications

References 29 publications

Soil fungal communities across land use types

Soil fungal communities across land use types

Plastic Allometry in Coarse Root Biomass of Mature Hybrid Poplar Plantations

Soil Microbial Biomass and Community Composition Relates to Poplar Genotypes and Environmental Conditions

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