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Biological control activity of three Trichoderma isolates against Fusarium wilts of cotton and muskmelon and lack of correlation with their lytic enzymes

Ordentlich, A. and Migheli, Quirico and Chet, I. (1991) Biological control activity of three Trichoderma isolates against Fusarium wilts of cotton and muskmelon and lack of correlation with their lytic enzymes. Journal of Phytopathology, Vol. 133 (3), p. 177-186. ISSN 0931-1785. eISSN 1439-0434. Article.

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DOI: 10.1111/j.1439-0434.1991.tb00152.x

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Abstract

The enzymatic activity and the biocontrol ability of two new isolates of Trichoderma spp. (T-68 and Gh-2) were compared in laboratory and glasshouse experiments with a previously studied T. harzianum strain (T-35). In dual culture tests with Fusarium oxysporum f. sp. melonis and F. oxysporum f. sp. vasinfectum, isolates T-68 and Gh-2 overgrew the colonies of Fusarium, whereas T-35 failed to parasitize both wilt pathogens. Under glasshouse conditions, the three isolates of Trichoderma were effective in controlling Fusarium wilt of cotton but only T-35 was effective against F. oxysporum f. sp. melonis on muskmelon. When the three Trichoderma isolates were grown on liquid media containing laminarin, colloidal chitin or F. oxysporum f. sp. melonis cell walls as sole carbon sources, maximum β-1,3-glucanase and chitinase specific activity in the culture filtrates of all fungi was reached after 72h of incubation. When culture filtrates of the three Trichoderma isolates were incubated with freeze-dried mycelium of F. oxysporum f. sp. melonis or F. oxysporum f. sp. vasinfectum, different concentrations of glucose and N-acetyl-D-glucosamine were released. Overall no correlation was found between enzymatic activity and the biocontrol capability against Fusarium wilt on muskmelon and cotton.

Item Type:Article
ID Code:9569
Status:Published
Refereed:Yes
Uncontrolled Keywords:Trichoderma, Fusarium oxysporum, lytic enzymes
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/12 Patologia vegetale
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:Blackwell / Wiley
ISSN:0931-1785
eISSN:1439-0434
Copyright Holders:© 1991 Paul Parey Scientific Publishers, Berlin and Hamburg
Deposited On:14 Jan 2014 13:14

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