Biotic and Abiotic Induction of a Fungitoxic Compound in Rice Bean (Vigna umbellata [Thunb.] Ohwi and Ohashi) |
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| Authors: | D K Datta A K Mukherjee K R Samaddar |
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| Institution: | Plant Pathology Laboratory, Department of Botany, Kalyani University, Kalyani, West Bengal, India |
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| Abstract: | Young leaves of rice bean produced relatively more fungitoxic compound(s) than the older leaves. Epicotyls, roots, mature leaves and pods, but not cotyledon and cotyledonary leaves, synthesized the antifungal compound(s) following inoculation with anon-pathogen of this plant. Epicotyl segments when chopped or pinpricked produced the phytoalexin. Treatment of epicotyls with a dilute concentration of various chemicals caused induction of the fungitoxic compound(s). Induction by inoculation, injury and chemicals suggest a phytoalexin nature of the compound. Presence of phaseollin in the extracts of inoculated, injured or chemical-treated epicotyls has been demonstrated. |
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