The effect of soil phosphorus on the external mycelium growth of arbuscular mycorrhizal fungi during the early stages of mycorrhiza formation

1994 ◽  
Vol 166 (2) ◽  
pp. 271-280 ◽  
Author(s):  
J. C. C. de Miranda ◽  
P. J. Harris
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Soil Phosphorus ◽  
Arbuscular Mycorrhizal ◽  
Mycelium Growth ◽  
Early Stages ◽  
Mycorrhiza Formation ◽  
External Mycelium

scholarly journals Tolerance of arbuscular mycorrhizal fungi and microorganisms associated to their hyphosphere to aluminum in soil

2021 ◽  
Vol 51 ◽  
pp. e1304
Author(s):  
Yazmín Carreón-Abud ◽  
Mayra E. Gavito
Keyword(s):  
Fatty Acid ◽  
Arbuscular Mycorrhizal Fungi ◽  
Toxic Effect ◽  
Mycorrhizal Fungi ◽  
Soil Microorganisms ◽  
Arbuscular Mycorrhizal ◽  
Central Compartment ◽  
Gigaspora Margarita ◽  
Mycelium Growth ◽  
External Mycelium

Background: The elements that are toxic to arbuscular mycorrhizal fungi (AMF) and soil microorganisms, and the levels at which they affect them, are poorly known. Objective: To quantify the effects of: 1) aluminum added to the soil (0, 50 and 100 mg kg-1) and 2) inoculation with AMF (two isolates without prior exposure to aluminum, Acaulospora delicata and Gigaspora margarita, the native AMF community of a soil contaminated with Al, and a control without AMF) on the development of AMF mycelium and the hyphosphere-associated microbiota. Methods: A system with two compartments was used, a central compartment in which maize was sown and AMF were inoculated and a side compartment without root passage, where only the external mycelium was exposed to the different concentrations of Al. AMF external mycelium exposed to Al was quantified with the fatty-acid biomar-ker 16:1w5. Results and conclusions: Al concentrations up to 100 mg kg-1, controlling the pH of the soil, did not alter mycelium growth of any of the inoculated HMA either in the soil or in the roots. Aluminum added up to 100 mg kg-1 did not have a direct toxic effect on the growth of AMF mycelium and the hyphosphere-associated microbiota.

Evaluation of two commercial fungal inoculants for improving phosphorus supply to crops grown in soils with contrasting management histories

2020 ◽  
pp. 1-12
Author(s):  
J. Diane Knight
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Shoot Growth ◽  
Soil Phosphorus ◽  
Arbuscular Mycorrhizal ◽  
P Uptake ◽  
The Usa ◽  
Carry Over ◽  
Organically Managed ◽  
Penicillium Bilaiae

Abstract Two fungal inoculants are commercially available in Canada and the USA that target improving plant access to soil phosphorus (P). Arbuscular mycorrhizal fungi and Penicillium bilaiae were used to inoculate wheat, lentil and flax grown in an organically-managed and a conventionally-managed soil. A second crop was grown after freezing the soil to evaluate if the inoculants carried over to a second crop. Crops in the organically managed soil were smaller and took up less P than the same crop in the conventionally managed soil. Inoculation with either inoculant improved shoot growth and P uptake in wheat grown in the organically-managed soil and in lentil grown in the conventionally-managed soil. Co-application of the inoculants was never superior to the single inoculants. Carry-over effects were slight and inconsistent.

Seasonal colonization of winter wheat in South Coastal British Columbia by vesicular–arbuscular mycorrhizal fungi

1991 ◽  
Vol 69 (1) ◽  
pp. 78-86 ◽  
Author(s):  
Barbara J. Cade-Menun ◽  
Shannon M. Berch ◽  
A. A. Bomke
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Winter Wheat ◽  
Mycorrhizal Fungi ◽  
Soil Phosphorus ◽  
Arbuscular Mycorrhizal ◽  
Vesicular Arbuscular Mycorrhizal Fungi ◽  
Vesicular Arbuscular ◽  
Colonization Patterns ◽  
Highly Correlated ◽  
Coastal British Columbia

Seasonal colonization patterns of vesicular-arbuscular mycorrhizal fungi at four sites were monitored in the roots of winter wheat through the October to August growing season, as were a variety of environmental factors which might influence these patterns. Fall colonization was observed at the two sites which were the most highly colonized at all five harvests. The other two sites were not colonized until late spring and never attained high levels of colonization. Soil phosphorus, soil moisture, and plant physiology were shown to be most highly correlated with these patterns, while temperature was not believed to be an important factor. Key words: endomycorrhiza, Glomus, Sclerocystis, Acaulospora, Scutellospora.

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