Abstract

CABRERA, D; GONZALEZ, J.E; PORTAL, O  and  HERNANDEZ, R. INFLUENCE OF DASHEEN MOSAIC POTYVIRUS ON CLOROPHYLL CONTENT IN Xanthosoma nigrum (VELL.) GENOTIPE INIVIT M 95-1. Rev. Protección Veg. [online]. 2010, vol.25, n.3, pp. 194-196. ISSN 2224-4697.

Dasheen mosaic virus (DMV) is distributed in the tropical and subtropical regions where several genus and species of dasheen are cultivated. This virus produces symptoms on the Xanthosoma genus that vary from an intense mosaic to the deformation of the leaves, causing an evident reduction of photosynthetic pigments. The objective of this work was to determine the affectations caused by this virus on the chlorophyll content in dasheen plants Xanthosoma nigrum genotype INIVIT M 95-1. The chlorophyll «a», chlorophyll «b» and the total chlorophyll contents were determined spectrophotometrically at 645 and 663 nm. Based on fresh weight, the total chlorophyll concentration in healthy and diseased samples was 2,180 and 1,245 mg.g^-1 respectively. Infected plants with intense damages showed a significant reduction in the content of pigments in leaves. The loss of pigments in the affected plants can reduce the efficiency in the production of carbon hydrates during the photosynthesis and the subsequent reduction of the yields.

Keywords : chlorophyll; DMV; potyvirus.

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