Please use this identifier to cite or link to this item: http://cicy.repositorioinstitucional.mx/jspui/handle/1003/116
Is zinniol a true phytotoxin? Evaluation of its activity at the cellular level against Tagetes erecta
LUIS MANUEL PEÑA RODRIGUEZ
Acceso Abierto
Atribución-NoComercial-SinDerivadas
Zinniol, a non-host selective phytotoxin commonly produced by fungi of the Alternaria genus, has been reported as the metabolite responsible for the phytotoxicity of the lipophilic fraction of A. tagetica. While both the lipophilic fraction and zinniol have been shown to produce necrosis on leaves of susceptible marigold (Tagetes erecta) plants, the true role of zinniol in the infectious process remains uncertain. Using marigold cell cultures as a model, we evaluated the effects of zinniol and the lipophilic fraction at the cellular level and showed that pure zinniol is not markedly phytotoxic at concentrations known to induce necrosis in leaves of T. erecta. Moreover, the effects of zinniol on cell membranes and DNA fragmentation are less intense than those caused by the lipophilic fraction. These results suggest that zinniol may not play a significant role in the A. tagetica–T. erecta interaction and, consequently, its classification as a non-host selective phytotoxin is questionable.
26-03-2010
Artículo
Inglés
CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA
Appears in Collections:Artículos de Investigación Arbitrados

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