Long-term agricultural management impacts arbuscular mycorrhizal fungi more than short-term experimental drought

2020 ◽

Vol 8 (1) ◽

pp. 68-74

Author(s):

Dang Hoang Quyen ◽

Vu Thuy Duong ◽

Pham Nguyen Duc Hoang

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Mycorrhizal Fungi ◽

Host Plants ◽

Arbuscular Mycorrhizal ◽

Coffee Plant ◽

Short Term ◽

Bidens Pilosa ◽

Bahia Grass ◽

Coffee Cultivation

Coffee (Coffea spp.) is one of important industrial crops. Additionally, arbuscular mycorrhizal fungi (AMF) provide many benefits for plants such as increasing nutrient uptake, enhancing tolerance in drought and stress condition, etc. Therefore, preservation and propagation of AMF spores collected from coffee’s rhizosphere are necessary for coffee cultivation. The AMF preservation on coffee plant is not feasible because coffee is a long-term plants, which led to study on symbiotic ability of AMF on several short-term host plants (maize (Zea mays), plantain (Plantago spp.), rice (Oryza sativa), beggarticks (Bidens pilosa), and bahia grass (Pensacola bahia)) to maintain AM association. Investigation of symbiosis ability with four types of AMF spores showed that maize had the highest rate of fungal infection. The total number of AMF spore per 50g soil after 3 months of inoculation on maize reached 352 spores, which was 4.1 times higher than that of the origin while the lowest figure recorded in bahia grass is with only 2.3 times.

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Arbuscular mycorrhizal fungi - short-term liability but long-term benefits for soil carbon storage?

New Phytologist ◽

10.1111/nph.12079 ◽

2012 ◽

Vol 197 (2) ◽

pp. 366-368 ◽

Cited By ~ 36

Author(s):

Erik Verbruggen ◽

Stavros D. Veresoglou ◽

Ian C. Anderson ◽

Tancredi Caruso ◽

Edith C. Hammer ◽

...

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Soil Carbon ◽

Carbon Storage ◽

Mycorrhizal Fungi ◽

Arbuscular Mycorrhizal ◽

Soil Carbon Storage ◽

Short Term

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

10.21203/rs.3.rs-853989/v1 ◽

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.

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