Author(s):

Gummadi Sree Kavya, Muthuvel I, Rajangam J and Prabhu S

Abstract: Infestation of M. enterolobii alters the physiology of the host plant and reduces the yield of the crop. Thus studies were undertaken to know the biochemical changes in plants infested with M. enterolobii under controlled conditions. With regard to biochemical analysis, there were significant difference in total chlorophyll, total phenol, total sugar, total proline, total protein content and activity of enzymes like Peroxidase and Poly phenol oxidase in resistant and susceptible varieties. Resistant varieties like Strawberry guava, Banaras, Arka Mridula and species like P. cattleianum, P. guineense showed increased content of phenols, proline, protein, peroxidase and polyphenol oxidase activity from healthy to infected plants compared to susceptible varieties such as Lucknow- 49, Bapatla, Taiwan pink, Allahabad safeda, Luaknow-46 and Arka Amulya. There was a significant increase in the bio chemical characters except chlorophyll content due to inoculation of nematodes in both resistant and susceptible varieties. The identified variety with resistance to root knot nematodes combined with high yield and processing qualities could be exploited for future purposes.

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