A NEW TECHNIQUE FOR DETERMINING THE SUBLETHAL TOXICITY OF PESTICIDES TO THE VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGUS GLOMUS INTRARADICES

1998 ◽  
Vol 17 (7) ◽  
pp. 1421 ◽  
Author(s):  
Michael T. Wan ◽  
James E. Rahe ◽  
Ronald G. Watts
Keyword(s):  
Glomus Intraradices ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
New Technique ◽  
Sublethal Toxicity ◽  
Vesicular Arbuscular ◽  
A New Technique

scholarly journals Micropropagated Banana Infected with Meloidogyne javanica Responds to Glomus intraradices and Phosphorus

HortScience ◽  
1997 ◽  
Vol 32 (1) ◽  
pp. 101-103 ◽  
Author(s):  
Jorge Pinochet ◽  
Carolina Fernández ◽  
María de Carmen Jaizme ◽  
Pedro Tenoury
Keyword(s):  
Glomus Intraradices ◽  
Root Colonization ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Meloidogyne Javanica ◽  
Root Knot Nematode ◽  
Growth And Nutrition ◽  
Vesicular Arbuscular ◽  
Low Potassium

The effects of the interaction between the vesicular-arbuscular mycorrhizal fungus Glomus intraradices Schenk and Smith and the root-knot nematode Meloidogyne javanica (Treub) Chitwood on growth and nutrition of micropropagated `Grand Naine' banana (Musa AAA) were studied under greenhouse conditions. Inoculation with G. intraradices significantly increased growth of plants in relation to nonmycorrhizal plants and was more effective than P fertilization in promoting plant development. Mycorrhizal colonization did not affect nematode buildup in the roots, although plants with the nematode and mycorrhiza were more galled. Meloidogyne javanica had no effect on the percentage of root colonization in mycorrhiza-inoculated plants. No element deficiency was detected by foliar analysis. All elements were within sufficiency levels for banana with exception of N, which was low. Potassium levels were lower in mycorrhizal plants, while Ca and Mg levels were higher with mycorrhiza than without, with or without the nematode. Early inoculation with G. intraradices appears to favor growth of banana plants by enhancing plant nutrition.

Effect of Glomus intraradices on infection by Fusarium oxysporum f.sp. radicis-lycopersici in tomatoes over a 12-week period

1986 ◽  
Vol 64 (3) ◽  
pp. 552-556 ◽  
Author(s):  
M. Caron ◽  
J. A. Fortin ◽  
C. Richard
Keyword(s):  
Fusarium Oxysporum ◽  
Glomus Intraradices ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Observation Time ◽  
Root Pathogen ◽  
Tomato Plants ◽  
Vesicular Arbuscular ◽  
Root Necrosis

The interaction between Glomus intraradices Schenck & Smith, a vesicular–arbuscular mycorrhizal fungus, and Fusarium oxysporum Schlecht f.sp. radicis-lycopersici Jarvis & Shoemaker and its effect on tomato plants were investigated over a 12-week period. The root colonization by Glomus was not affected by the presence of Fusarium. The number of Fusarium propagules was consistently lower when the plants were inoculated with Glomus. The presence of Glomus decreased root necrosis caused by Fusarium in weeks 5, 11, and 12, but no significant effect was observed for the other 9 weeks. The results obtained at any observation time for the endomycorrhizal colonization and the Fusarium population, but not for the percent of root necrosis evaluation, were consistent throughout the 12-week experiment. It is concluded that the parameters used to study the interaction between a vesicular–arbuscular mycorrhizal fungus, a fungal root pathogen, and a host plant must be measured at different times after inoculation with the pathogen to make sure that observations are representative of the interaction under study.

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