Decrease in diversity and changes in community composition of arbuscular mycorrhizal fungi in roots of apple trees with increasing orchard management intensity across a regional scale

2015 ◽  
Vol 24 (4) ◽  
pp. 941-952 ◽  
Author(s):  
Maarten van Geel ◽  
An Ceustermans ◽  
Wendy van Hemelrijck ◽  
Bart Lievens ◽  
Olivier Honnay
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Community Composition ◽  
Mycorrhizal Fungi ◽  
Regional Scale ◽  
Arbuscular Mycorrhizal ◽  
Apple Trees ◽  
Management Intensity ◽  
Orchard Management

scholarly journals Precipitation shapes communities of arbuscular mycorrhizal fungi in Tibetan alpine steppe

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Jing Zhang ◽  
Fang Wang ◽  
Rongxiao Che ◽  
Ping Wang ◽  
Hanke Liu ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Community Composition ◽  
Plant Species ◽  
Mycorrhizal Fungi ◽  
Environmental Changes ◽  
Regional Scale ◽  
Arbuscular Mycorrhizal ◽  
Future Climate Change ◽  
Alpine Steppe ◽  
Amf Communities

Abstract Tibetan Plateau is one of the largest and most unique habitats for organisms including arbuscular mycorrhizal fungi (AMF). However, it remains unclear how AMF communities respond to key environmental changes in this harsh environment. To test if precipitation could be a driving force in shaping AMF community structures at regional scale, we examined AMF communities associated with dominant plant species along a precipitation gradient in Tibetan alpine steppe. Rhizosphere soils were collected from five sites with annual precipitation decreasing from 400 to 50 mm. A total of 31 AMF operational taxonomic units (OTUs) were identified. AMF community composition varied significantly among sites, whereas AMF community composition did not vary among plant species. Path analysis revealed that precipitation directly affected AMF hyphal length density, and indirectly influenced AMF species richness likely through the mediation of plant coverage. Our results suggested that water availability could drive the changes of AMF communities at regional scale. Given the important roles AMF could play in the dynamics of plant communities, exploring the changes of AMF communities along key environmental gradients would help us better predict the ecosystem level responses of the Tibetan vegetation to future climate change.

Species diversity and community composition of native arbuscular mycorrhizal fungi in apple roots are affected by site and orchard management

2017 ◽  
Vol 116 ◽  
pp. 42-54 ◽  
Author(s):  
Alessandra Turrini ◽  
Monica Agnolucci ◽  
Michela Palla ◽  
Elisabetta Tomé ◽  
Massimo Tagliavini ◽  
...  
Keyword(s):  
Species Diversity ◽  
Arbuscular Mycorrhizal Fungi ◽  
Community Composition ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Orchard Management

Grazing intensity rather than host plant’s palatability shape the community of arbuscular mycorrhizal fungi in a steppe grassland

2021 ◽  
Author(s):  
Maede Faghihinia ◽  
Yi Zou ◽  
Yongfei Bai ◽  
Martin Dudáš ◽  
Rob Marrs ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Community Composition ◽  
Mycorrhizal Fungi ◽  
Rhizosphere Soil ◽  
Grazing Intensity ◽  
Arbuscular Mycorrhizal ◽  
Grass Species ◽  
Α Diversity ◽  
Steppe Grassland

Abstract Arbuscular mycorrhizal fungi (AMF) are the predominant type of mycorrhizal fungi in roots and rhizosphere soil of grass species worldwide. Grasslands are currently experiencing increasing grazing pressure, but it is not yet clear how grazing intensity and host plant grazing preference by large herbivores interact with soil- and root-associated AMF communities. Here, we tested whether the diversity and community composition of AMF in the roots and rhizosphere soil of two dominant perennial grasses grazed differently by livestock change in response to grazing intensity. We conducted a study in a long-term field experiment in which seven levels of field-manipulated grazing intensities were maintained for 13 years in a typical steppe grassland in northern China. We extracted DNA from the roots and rhizosphere soil of two dominant grasses, Leymus chinense (Trin.) Tzvel. and Stipa grandis P. Smirn, with contrasting grazing preference by sheep. AMF DNA from root and soil samples were then subjected to molecular analysis. Our results showed that AMF α-diversity (richness) at the virtual taxa (VT) level varied as a function of grazing intensity. Different VTs showed completely different responses along the gradient, one increasing, one decreasing and others showing no response. Glomeraceae was the most abundant AMF family along the grazing gradient, which fits well with the theory of disturbance tolerance of this group. In addition, sheep grazing preference for host plants did not explain a considerable variation in AMF α-diversity. However, the two grass species exhibited different community composition in their roots and rhizosphere soils. Roots exhibited a lower α-diversity and higher β-diversity within the AMF community than soils. Overall, our results suggest that long-term grazing intensity might have changed the abundance of functionally-diverse AMF taxa in favor of those with disturbance-tolerant traits. We suggest our results would be useful in informing the choice of mycorrhizal fungi indicator variables when assessing the impacts of grassland management choices on grassland ecosystem functioning.

scholarly journals Phylogeny of arbuscular mycorrhizal fungi predicts community composition of symbiosis-associated bacteria

2006 ◽  
Vol 57 (3) ◽  
pp. 389-395 ◽  
Author(s):  
Matthias C. Rillig ◽  
Daniel L. Mummey ◽  
Philip W. Ramsey ◽  
John N. Klironomos ◽  
James E. Gannon
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Community Composition ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Associated Bacteria
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