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Asian Journal of Plant Pathology

Year: 2007 | Volume: 1 | Issue: 1 | Page No.: 12-17
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Authors

Louis K. Prom

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Research Article

Claviceps africana Spore Germination as Influenced by Components of Sorghum Floral Extracts

Louis K. Prom
The effect in vitro of washed and crushed anther/pollen and stigma extracts from six sorghum lines with different levels of ergot susceptibility on ergot conidial germination was determined. Conidia plated on water agar amended with either anther/pollen or stigma extracts generally stimulated higher rates of conidia germination than conidia plated on water agar alone. However, conidia germinations were suppressed on water agar plates amended with washed anther/pollen extracts from Novartis KS310, washed stigma extracts from NC+7W97 and crushed stigma extracts from NC+8R18. Compared to the other plates with stigma extracts, plates containing extracts from male-sterile line, ATx623 stimulated up to 227% higher conidia germination over the control plates. Overall, plates amended with anther/pollen extracts had significantly higher rates of germinated conidia than those containing stigma extracts. Overall, anther/pollen and stigma extracts tended to stimulate ergot conidia germination. However, components in the anther/pollen or stigma extracts from some of the sorghum lines exhibited the capacity to suppress spore germination. The critical factors from these floral components could be identified and used to minimize the impact of the disease.
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