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Pedras, M.S. et al.

M. Soledade C. Pedras, Paulos B. Chumala, Wei Jin, Mohammed S. Islam, Dominic W. Hauck,

The phytopathogenic fungus Alternaria brassicicola: phytotoxin production and phytoalexin elicitation.

The metabolites and phytotoxins produced by the phytopathogenic fungus Alternaria brassicicola (Schwein.) Wiltshire, as well as the phytoalexins induced in host plants, were investigated. Brassicicolin A emerged as the most selective phytotoxic metabolite produced in liquid cultures of A. brassicicola and spirobrassinin as the major phytoalexin produced in infected leaves of Brassica juncea (whole plants). In detached infected leaves of B. juncea, the main component was N'-acetyl-3-indolylmethanamine, the product of detoxification of the phytoalexin brassinin by A. brassicicola. In addition, the structure elucidation of three hitherto unknown metabolites having a fusicoccane skeleton was carried out and the antifungal activity of several plant defenses against A. brassicicola was determined.[1]

References

The phytopathogenic fungus Alternaria brassicicola: phytotoxin production and phytoalexin elicitation. Pedras, M.S., Chumala, P.B., Jin, W., Islam, M.S., Hauck, D.W. Phytochemistry (2009) [Pubmed]

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