scholarly journals Effects of a mycophagous Collembola on the symbioses between Trifolium subterraneum and three arbuscular mycorrhizal fungi

1996 ◽  
Vol 133 (2) ◽  
pp. 295-302 ◽  
Author(s):  
JOHN LARSEN ◽  
IVER JAKOBSEN
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Trifolium Subterraneum ◽  
Arbuscular Mycorrhizal

scholarly journals Arbuscular Mycorrhizal Fungi and Nutrition Determine the Outcome of Competition Between Lolium multiflorum and Trifolium subterraneum

2021 ◽  
Vol 12 ◽  
Author(s):  
Stephan Unger ◽  
Franziska M. Habermann ◽  
Katarina Schenke ◽  
Marjan Jongen
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Lolium Multiflorum ◽  
Trifolium Subterraneum ◽  
Arbuscular Mycorrhizal ◽  
N Fertilization ◽  
Competitive Balance ◽  
Plant Interactions ◽  
P Fertilization ◽  
The Cost

Arbuscular mycorrhizal fungi (AMF) may affect competitive plant interactions, which are considered a prevalent force in shaping plant communities. Aiming at understanding the role of AMF in the competition between two pasture species and its dependence on soil nutritional status, a pot experiment with mycorrhizal and non-mycorrhizal Lolium multiflorum and Trifolium subterraneum was conducted, with manipulation of species composition (five levels), and nitrogen (N)- and phosphorus (P)- fertilization (three levels). In the non-mycorrhizal state, interspecific competition did not play a major role. However, in the presence of AMF, Lolium was the strongest competitor, with this species being facilitated by Trifolium. While N-fertilization did not change the competitive balance, P-fertilization gave Lolium, a competitive advantage over Trifolium. The effect of AMF on the competitive outcome may be driven by differential C-P trade benefits, with Lolium modulating carbon investment in the mycorrhizal network and the arbuscule/vesicle ratio at the cost of Trifolium.

scholarly journals Spore communities of arbuscular mycorrhizal fungi and mycorrhizal associations in different ecosystems, south Australia

2002 ◽  
Vol 26 (3) ◽  
pp. 627-635 ◽  
Author(s):  
Z. I. Antoniolli ◽  
E. Facelli ◽  
P. O'Connor ◽  
D. Miller ◽  
K. Ophel-Keller ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Plantago Lanceolata ◽  
Trifolium Subterraneum ◽  
Arbuscular Mycorrhizal ◽  
Soil P ◽  
Permanent Pasture ◽  
Mycorrhizal Associations ◽  
Sampling Times

Communities of arbuscular mycorrhizal fungi (AMF) were surveyed in different South Australian ecosystems. The soil was wet-sieved for spore extraction, followed by the determination of presence and abundance of AMF species as well as the percentage of root colonization. Mycorrhizal associations were common and there was substantial fungal diversity in different ecosystems. Spores were most abundant in the permanent pasture system and less abundant under continuous wheat. The incidence of mycorrhizal associations in different plant species and the occurrence of Arum and Paris type colonization generally conformed with previous information. Spores of seventeen AMF were verified throughout seasonal changes in 1996 and 1997 in the permanent pasture and on four host species (Lolium perenne, Plantago lanceolata, Sorghum sp. and Trifolium subterraneum) , set up with the same soils under greenhouse conditions. Glomus mosseae was the dominant spore type at all sampling times and in all trap cultures. Mycorrhizal diversity was significantly affected by different sampling times in trap cultures but not in field-collected soil. P. lanceolata, Sorghum sp. and T. subterraneum as hosts for trap cultures showed no differences in richness and diversity of AMF spores that developed in association with their roots. Abundance and diversity were lowest, however, in association with L. perenne , particularly in December 1996. Results show that the combination of spore identification from field-collected soil and trap cultures is essential to study population and diversity of AMF. The study provides baseline data for ongoing monitoring of mycorrhizal populations using conventional methods and material for the determination of the symbiotic effectiveness of AMF key members.

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