Journal of Plant Disease Sciences
Year : 2009, Volume : 4, Issue : 1
First page : ( 57) Last page : ( 59)
Print ISSN : 0973-7456. Online ISSN : 0976-2388.

Biochemical Changes in Teak Leaves Infected by Powdery Mildew Fungus, Uncinula Tectonae Salm

Sankar N. Ravi, Sreeramulu A.

Applied Plant Pathology Research Laboratory, Department of Botany, Sri Venkateswara University, Tirupati-517 502 (Andhra Pradesh)

Abstract

Biochemical alterations in teak plants exposed to biotic stress of powdery mildew infection caused by Uncinula tectonae Salm were studied. Significant gradual loss in the contents of total chlorophylls, carbohydrates (reducing, non reducing sugars and starch) and proteins were observed with an increase in the foliage infection. Total phenol content was considerably increased in the infected leaves. Further, the pathogen caused a stimulation of peroxidase activities in the infected leaves. Observations of all these metabolic changes further lead to drying of the infected leaves and results in defoliation.

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Keywords

Teak, powdery mildew, Uncinula tectonae, biochemical changes.

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