Community structure of arbuscular mycorrhizal fungi associated to Veronica rechingeri at the Anguran zinc and lead mining region

Zarei, Mehdi; König, Stephan; Hempel, Stefan; Nekouei, Mojtaba Khayam; Savaghebi, G.; Buscot, François

doi:10.1016/j.envpol.2008.03.006

Cited by 94 publications

(56 citation statements)

References 41 publications

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“…However, taking into account very low concentrations of bioavailable forms of Pb (max. 7 mg kg A toxic effect of Cd, Zn and Pb on mycorrhizal fungi as well as their resistance to these metals was also reported by other authors [26,[52][53][54][55]. In the present field experiment with spontaneous vegetation mycorrhizal colonization was high in soil layers with the concentration of bioavailable Cd lower than 20 mg kg −1 (Fig.…”

Section: Discussionsupporting

confidence: 70%

“…Its spores were found in deeper soil layers (20-40, 40-60 cm) where the concentration of bioavailable Cd and Zn was still high when compared to the concentration of bioavailable metals reported by other authors [19,48,55,64]. Two other species Funneliformis mosseae and Archaeospora trappei were represented by 2 and 1 spore respectively (Tab.…”

Section: Discussionmentioning

confidence: 83%

“…Zarei et al [55,63,64] found from 60 to 131 spores per 150 g of dry soil at a site adjacent to a Zn and Pb open pit mine. Pawłowska et al [65] determined 30-38 spores per 150 g of substrate from calamine spoil mound, del Val et al [19] 45-345 spores per 150 g of soil contaminated by addition of sewage sludge and Wu et al [66] 132-492 spores per 150 g of soil contaminated by As/Pb/Zn mines.…”

Section: Discussionmentioning

confidence: 99%

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Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

et al. 2013

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This study presents root colonization of Deschampsia cespitosa growing in the immediate vicinity of a former Pb/Zn smelter by arbuscular mycorhizal fungi (AMF) and dark septated endophytes (DSE) at different soil depths. AMF spores and species distribution in soil profile were also assessed. Arbuscular mycorrhiza (AM) and DSE were found in D. cespitosa roots at all investigated soil levels. However, mycorrhizal colonization in topsoil was extremely low with sporadically occurring arbuscules. AM parameters: frequency of mycorrhization of root fragments (F%), intensity of root cortex colonization (M%), intensity of colonization within individual mycorrhizal roots (m%), and arbuscule abundance in the root system (A%) were markedly higher at 20–40, 40–60 cm soil levels and differed in a statistically significant manner from AM parameters from 0–10 and 10–20 cm layers. Mycorrhizal colonization was negatively correlated with bioavailable Cd, Pb and Zn concentrations. The number of AMF spores in topsoil was very low and increased with soil depth (20–40 and 40–60 cm). At the study area spores of three morphologically distinctive AMF species were found: Archaeospora trappei, Funneliformis mosseae and Scutellospora dipurpurescens. The fourth species Glomus tenue colonized roots of D. cespitosa and was observed in the root cortex at 20–40 and 40–60 soil depth, however, its spores were not found at the site.

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Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

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Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

et al. 2013

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“…This genus is widespread in metalcontaminated environments (Turnau et al 2001;Vallino et al 2006;Zarei et al 2008), suggesting that these Glomus species could be metal tolerant. We also identified ECM OTUs belonging to Peziza, Tuber, Geopora and Hebeloma, as reported in different studies investigating fungal communities from poplar roots ( Endophytic fungi are involved in the phytostabilisation processes of the plants that they are associated with.…”

Section: Discussionmentioning

confidence: 99%

New mutualistic fungal endophytes isolated from poplar roots display high metal tolerance

et al. 2016

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This study aimed to isolate, identify, and characterise metal-tolerant fungi colonising poplar roots at a metalcontaminated phytoremediation site. Poplar roots were colonised by arbuscular mycorrhizal, ectomycorrhizal, and endophytic fungi, and the species were determined by ITS molecular analyses. Eight different isolates were successfully isolated into pure culture. Three isolates belonging to the Helotiales (P02, P06) and the Serendipita vermifera species (P04) were highly tolerant to metals (Cd, Zn, Pb, and Cu) compared to the mycorrhizal Hebeloma isolates. The three isolates degraded complex carbohydrates, such as xylan and cellulose, indicating that they could partially degrade root cell walls and penetrate into cells. This hypothesis was confirmed by further in vitro re-synthesis experiments, which showed that the three isolates colonised root tissues of poplar plantlets whereas two of them formed microsclerotia-like structures. Taken together, these results suggest an endophytic lifestyle of these isolates. This is the first evidence of S. vermifera as a root endophyte of poplar. A new endophytic putative species belonging to the Helotiales and closely related to Leohumicola is also reported. Interestingly, and when compared to mock-inoculated plants, both P06 and P04 isolates increased the number of root tips of inoculated poplar plantlets in vitro. Moreover, the S. vermifera P04 isolate also increased the shoot biomass. The results are discussed in relation to the potential use of endophytic strains for tree-based phytoremediation of metal-contaminated sites.

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“…Cloning, clone fingerprinting by RFLP and sequencing were performed as in Ref. 39 . Sequences were pre-sorted into syngeneic clusters using the contig-tool as implemented in Sequencher 4.8 (Gene Codes Corp., Ann Arbor, USA).Closest matches to each sequence cluster were determined using the BLASTN sequence similarity search tool in GenBank 40 and used as references.…”

Section: Sampling Of Belowground Organismsmentioning

confidence: 99%

Bottom-up effects of plant diversity on multitrophic interactions in a biodiversity experiment

Scherber

Eisenhauer

Weisser

et al. 2010

Nature

830

844

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A; et al., (2010). Bottom-up effects of plant diversity on multitrophic interactions in a biodiversity experiment. Nature, (468) Bottom-up effects of plant diversity on multitrophic interactions in a biodiversity experiment Abstract Biodiversity is rapidly declining1, and this may negatively affect ecosystem processes, including economically important ecosystem services. Previous studies have shown that biodiversity has positive effects on organisms and processes4 across trophic levels. However, only a few studies have so far incorporated an explicit food-web perspective. In an eight-year biodiversity experiment, we studied an unprecedented range of above-and below-ground organisms and multitrophic interactions. A multitrophic data set originating from a single long-term experiment allows mechanistic insights that would not be gained from meta-analysis of different experiments. Here we show that plant diversity effects dampen with increasing trophic level and degree of omnivory. This was true both for abundance and species richness of organisms. Furthermore, we present comprehensive above-ground/below-ground biodiversity food webs. Both above ground and below ground, herbivores responded more strongly to changes in plant diversity than did carnivores or omnivores. Density and richness of carnivorous taxa was independent of vegetation structure. Below-ground responses to plant diversity were consistently weaker than above-ground responses. Responses to increasing plant diversity were generally positive, but were negative for biological invasion, pathogen infestation and hyperparasitism. Our results suggest that plant diversity has strong bottom-up effects on multitrophic interaction networks, with particularly strong effects on lower trophic levels. Effects on higher trophic levels are indirectly mediated through bottom-up trophic cascades. However, only few studies so far incorporated an explicit food-web perspective 6 . In an 8-50 year biodiversity experiment, we studied an unprecedented range of above-and 51 belowground organisms and biotic interactions. A multitrophic dataset originating from 52 a single long-term experiment allows mechanistic insights that otherwise would not be 53 possible using meta-analysis of different experiments. We show that plant diversity 54 effects dampen with increasing trophic level and degree of omnivory. This finding was 55 consistent both for abundance and species richness of organisms. Further, we present 56 comprehensive above-belowground biodiversity food webs. Both above-and 57 belowground, herbivores responded more strongly to changes in plant diversity than did 58 carnivores or omnivores. Density and richness of carnivorous taxa was independent of 59 vegetation structure. Belowground responses to plant diversity were consistently weaker 60 than aboveground responses. Responses to increasing plant diversity were generally 61 positive, but negative for biological invasion, pathogen infestation and hyperparasitism. 62Our results suggest that plant diversity exhibits stron...

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Community structure of arbuscular mycorrhizal fungi associated to Veronica rechingeri at the Anguran zinc and lead mining region

Cited by 94 publications

References 41 publications

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

New mutualistic fungal endophytes isolated from poplar roots display high metal tolerance

Bottom-up effects of plant diversity on multitrophic interactions in a biodiversity experiment

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