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Fitopatologia Brasileira

Print version ISSN 0100-4158

Abstract

SOUZA, Rocheli de et al. Effect of the Soil-borne wheat mosaic virus on the metabolism of five wheat genotypes with different levels of resistance to the disease. Fitopatol. bras. [online]. 2005, vol.30, n.4, pp. 400-403. ISSN 0100-4158.  http://dx.doi.org/10.1590/S0100-41582005000400010.

The objective of this study was to verify the metabolic alterations induced by Soil-borne wheat mosaic virus (SBWMV), one of the most economically harmful viruses infecting wheat (Triticum aestivum) farming. The study analyzed the levels of soluble proteins and determined the activities of peroxidase and protease in four wheat cultivars (BRS Guabiju, BR 23, BRS 179, BRS 194) and one line (PF 980524) with different levels of resistance to the virus. The data obtained were submitted to analysis of variance, and averages were compared by Duncan's Test at 5%. Soluble protein levels were higher in plants without symptoms, while peroxidase and protease activities were higher in plants with mosaic symptoms than in assymptomatic plants. Moreover, it appeared that genotypes with high susceptibility to SBWMV have high protease activity. These results could help in the design of future studies aimed at controlling the virus through inhibition of protease.

Keywords : soluble proteins; peroxidase; protease; Furovirus.

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