Necrotrophic phase of Moniliophthora perniciosa causes salicylic acid accumulation in infected stems of cacao
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چکیده
Moniliophthora perniciosa infects young meristematic tissue of Theobroma cacao and induces abnormal shoot development and ultimately necrosis. We analyzed culture filtrates of M. perniciosa to identify metabolites with possible effects on witches’ broom disease symptom development. All isolates produced salicylic acid (SA), phenyllactic acid and mandelic acid. When SA levels were measured in plant tissues, infected brooms had 5 times more SA compared to healthy shoots. In contrast, leaf inoculation with basidiospores and application of chemical elicitors did not alter leaf SA content. These findings suggest that the necrotrophic phase of M. perniciosa causes SA accumulation in diseased tissues. r 2007 Elsevier Ltd. All rights reserved.
منابع مشابه
The hemibiotrophic cacao pathogen Moniliophthora perniciosa depends on a mitochondrial alternative oxidase for biotrophic development
The tropical pathogen Moniliophthora perniciosa causes witches' broom disease in cacao. As a hemibiotrophic fungus, it initially colonizes the living host tissues (biotrophic phase), and later grows over the dead plant (necrotrophic phase). Little is known about the mechanisms that promote these distinct fungal phases or mediate the transition between them. An alternative oxidase gene (Mp-aox) ...
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