PMID: 15339037Sep 2, 2004Paper

Biochemical changes in Glomus fasciculatum colonized roots of Lycopersicon esculentum in presence of Meloidogyne incognita

Indian Journal of Experimental Biology
M Nagesh, P Parvatha Reddy

Abstract

Glasshouse experiments were conducted to elicit biochemical substantiation for the observed difference in resistance to nematode infection in roots colonized by mycorrhiza, and susceptibility of the fresh flush of roots of the same plant that escaped mycorrhizal colonization. Tomato roots were assayed for their biochemical profiles with respect to total proteins, total phenols, indole acetic acid, activities of polyphenol oxidase, phenylalanine ammonia lyase and indole acetic acid oxidase. The roots of the same plant (one set) received Glomus fasciculatum and G. fasciculatum plus juveniles of Meloidogyne incognita separately; and half the roots of second set of plants received G. fasciculatum while the other half of roots did not receive any treatment. Roots colonized by G. fasciculatum recorded maximum contents of proteins and phenols followed by that of the roots that received G. fasciculatum plus M. incognita. However, IAA content was lowest in the roots that received mycorrhiza or mycorrhiza plus juveniles of root-knot nematode and correspondingly. Roots that received juveniles of root-knot nematode recorded maximum IAA content and per cent increase over healthy check and mycorrhiza-inoculated roots. The comparative assay o...Continue Reading

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