Effect of fungicides on three vesicular-arbuscular mycorrhizal fungi associated with winter wheat (Triticum aestivum L.)

1989 ◽  
Vol 7 (2) ◽  
pp. 120-128 ◽  
Author(s):  
J. C. Dodd ◽  
P. Jeffries
Keyword(s):  
Triticum Aestivum ◽  
Arbuscular Mycorrhizal Fungi ◽  
Winter Wheat ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Triticum Aestivum L ◽  
Vesicular Arbuscular Mycorrhizal Fungi ◽  
Vesicular Arbuscular

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.

Propagation and storage of vesicular–arbuscular mycorrhizal fungi isolated from Saskatchewan agricultural soils

1993 ◽  
Vol 71 (10) ◽  
pp. 1328-1335 ◽  
Author(s):  
Narayan C. Talukdar ◽  
James J. Germida
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Agricultural Soils ◽  
Gradient Centrifugation ◽  
Arbuscular Mycorrhizal ◽  
Triticum Aestivum L ◽  
Spore Production ◽  
Nutrient Stress ◽  
Vesicular Arbuscular Mycorrhizal Fungi ◽  
Vesicular Arbuscular

Factors affecting the propagation of vesicular–arbuscular mycorrhizal fungi (VAMF) Glomus clarum, Glomus mosseae, and Glomus versiforme isolated from Saskatchewan soils were assessed in growth-chamber studies. Initially, lentil (Lens esculenta L.), maize (Zea mays L.), and a sorghum (Sorghum bicolor (L.) Moench) and sudangrass (Sorghum sudanense (Piper) Hitch.) hybrid were inoculated with G. clarum and grown in 2 or 6 kg of soil–sand (1:1) substrate until maturity. All three crops supported growth and spore production by G. clarum, but the maize plant yielded the largest number of spores. The ability of G. clarum to produce large numbers of spores reflects either an inherent ability of this VAMF strain to sporulate or a favorable interaction (related to spore production) with a maize host crop. Twice as many G. clarum spores per gram of soil–sand substrate were obtained from 2-kg pots compared with 6-kg pots. Enhanced spore production in the smaller pots was related to poor plant growth and, apparently, nutrient stress. Plants grown in 2-kg pots were stunted, yielded less biomass, and exhibited severe symptoms of P and N deficiency. Monospecific cultures of G. clarum, G mosseae, and G. versiforme were produced using maize plants grown in 2-kg pots. Under these conditions the level of spore production was G. clarum > G. versiforme > G. mosseae. Storage of the VAMF inoculants at 7 °C, compared with 25 °C, enhanced spore viability. This was evident from a reduction in VAMF colonization and spore production in wheat (Triticum aestivum L.) and the sorghum–sudangrass hybrid plants inoculated with G. mosseae spores stored at 25 °C. Osmotic stress exerted on G. mosseae spores during density-gradient centrifugation had no effect on their viability. Key words: vesicular–arbuscular mycorrhizal fungi, Glomus spp., host crops, substrate mass, nutrient stress.

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