Interactions of vesicular arbuscular mycorrhizal fungi with Fusarium wilt and growth of the tomato
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Authors
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PRADEEP KUMAR SINGH*, MEENAKSHI MISHRA, DEEPAK VYAS
Abstract
The effect of pre-inoculation with vesicular arbuscular mycorrhiza (VAM) on Fusarium wilt of tomato was assessed in a glasshouse trial. Inoculation with Fusarium oxysporum f. sp. lycopersici decreased plant growth compared to noninoculated controls, irrespective of the mycorrhizal status of the plant. Mycorrhizal plants were slightly smaller than the nonmycorrhizal ones. Addition of extra phosphorus to the soil enhanced plant growth but this enhancement was totally eliminated by the Fusarium. It is not expected, therefore, that VAM could affect the severity of disease caused by Fusarium even under conditions where VAM would normally have been beneficial for plant growth. The lowest percentage mycorrhizal infection was found on plants with the most severe disease symptoms.
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