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首页> 外文会议>Synthesis and chemistry of agrochemicals V >Biologicla activity and synthesis of a kenaf phytoalexin highly active against fungal wilt pathogens
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Biologicla activity and synthesis of a kenaf phytoalexin highly active against fungal wilt pathogens

机译：对真菌性枯萎病原体具有高度活性的洋麻植物抗毒素的生物活性和合成

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A new potent phytoalexin has bene isolated from kenaf (Hibiscus cannabinus) and identified as 3,8-dimethyl-1,2- naphthoquinone,which we call 0-Hibiscanone had ED_50 values of 0.5 #um#g/ml and 1.1 #um#g/ml against condiia of Verticillium dahliae and Fusarium oxysporum f.sp.vasinfecturmrespctively.In comparison,desoxyhemigossypol,the most potent phytoalexin in cotton oxylem tissue,had ED_50 values of 5.2 #um#g/mL and 8.8 #um#ml,resepctively.V.dahlae detoxifies o-hibiscanone by converting it to the benign hydoquinone.Mansanone C. a phytoalexin from elm which differs form 0-hibiscanone in that the latter lacks the isopropyl group of the former,was less than one-half as toxic to V.dahliae.o-Hibiscanone is behlieved t be derived form #delta#- dcadinene [2,3,4,6,7,8-hexahydro-1,6-dimthyl-4-(1-methylethyl)naphthalene].Abiosynthetic pathway to account for the loss of the isopropyl pgroup is proposed.
机译：从洋麻（Hibiscus cannabinus）中分离出一种新的有效植物抗毒素，鉴定为3,8-二甲基-1,2-萘醌，我们称之为0-Hibiscanone ED_50值为0.5＃um＃g / ml和1.1＃um＃克/毫升对黄萎病菌和尖孢镰刀菌的侵染作用最强V. dahlae通过将邻双氢萘酮转化为良性对苯二酚来解毒。曼沙酮C.一种来自榆木的植物抗毒素，与0-双氢萘酮不同，后者缺少前者的异丙基，对据认为，V.dahliae.o-Hibiscanone是由＃δ-dcadinene [2,3,4,6,7,8-六氢-1,6-二甲基-4-（1-甲基乙基）萘]衍生而来。提出了解决异丙基p基团损失的途径。

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