Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/71048
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dc.contributor.authorHo, W.C.en_US
dc.contributor.authorWu, T.Y.en_US
dc.contributor.authorSu, H.J.en_US
dc.contributor.authorKo, W.H.en_US
dc.date2007zh_TW
dc.date.accessioned2014-06-11T06:00:47Z-
dc.date.available2014-06-11T06:00:47Z-
dc.identifier.issn0191-2917zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/71048-
dc.description.abstractAmong 65 species of oriental medicinal plants tested, 39 contained substances inhibitory to conidial germination of Alternaria brassicicola, with the most inhibitory extract from speedweed (Polygonum perfoliatum). The inhibitory substances in dried speedweed were insoluble in water. However, the inhibitors were readily extracted with ethanol or methanol, but not with acetone, ether, or chloroform. The ethanol extract was very effective in controlling black leaf spot of spoon cabbage, Brassica campestris subsp. chinensis, caused by A. brassicicola. The inhibitory effect of the extract was not affected by treatment with anion exchange resins, but was partially reduced by cation exchange resins, indicating the presence of two inhibitory substances in the extract, one with a positive charge and the other with no charge on its molecule. The inhibitory substances in the extract were dialyzable with molecular weight minimums of 10,000 or 1,000, but not 500 or 100, suggesting that both inhibitors have molecular weights between 500 and 1,000.en_US
dc.language.isoen_USzh_TW
dc.relationPlant Diseaseen_US
dc.relation.ispartofseriesPlant Disease, Volume 91, Issue 12, Page(s) 1621-1624.en_US
dc.relation.urihttp://dx.doi.org/10.1094/pdis-91-12-1621en_US
dc.subjectiprodioneen_US
dc.titleEffect of oriental medicinal plant extracts on spore germination of Alternaria brassicicola and nature of inhibitory substances from speedweeden_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1094/pdis-91-12-1621zh_TW
item.grantfulltextnone-
item.openairetypeJournal Article-
item.cerifentitytypePublications-
item.languageiso639-1en_US-
item.fulltextno fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
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