A phytoalexin is modified to less fungitoxic substances by crown rot pathogen in groundnut Arachis hypogaea L.

dc.contributor.author Sailaja, P. R.
dc.contributor.author Podile, A. R.
dc.date.accessioned 2022-03-27T03:44:54Z
dc.date.available 2022-03-27T03:44:54Z
dc.date.issued 1998-06-01
dc.description.abstract Phytoalexins from four different treatments viz. control, AF 1-treated, A. niger-treated, and dual inoculated were separated by TLC showed that one phytoalexin with an Rf value of 0.628 (P1) appeared on 2nd day only in dual-inoculated seeds of groundnut (A. hypogaea ). By 3rd day three additional phytoalexins were visualized in response to A. niger-treatment with lower Rf values 0.485 (P2), 0.388 (P3) and 0.314 (P4) as compared to P1. In dual inoculated seedlings, P1 and P3 could be visualized while only P1 appeared in response to AF 1 on 3rd day. All the compounds lost fluorescence on exposure to light, got converted to pale yellow colour. In all the treatments no phytoalexin accumulation was observed after 3rd day. All the four phytoalexins had a major peak between 338 and 339.5 nm. In potato dextrose broth, the growth of A. niger showed a steady increase up to 32 hr while it was significantly inhibited with P1 in microtiter plates. P2, P3 and P4 (in the same order) had significantly less antifungal activity as compared to P1. The antifungal activity of the phytoalexins decreased with decrease in their Rf value.
dc.identifier.citation Indian Journal of Experimental Biology. v.36(6)
dc.identifier.issn 00195189
dc.identifier.uri https://dspace.uohyd.ac.in/handle/1/5057
dc.title A phytoalexin is modified to less fungitoxic substances by crown rot pathogen in groundnut Arachis hypogaea L.
dc.type Journal. Article
dspace.entity.type
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