GERMINATION AND GROWTH-INHIBITORY SESQUITERPENE LACTONES AND A FLAVONE FROM TITHONIA-DIVERSIFOLIA
GERMINATION AND GROWTH-INHIBITORY SESQUITERPENE LACTONES AND A FLAVONE FROM TITHONIA-DIVERSIFOLIA
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DOI：
10.1016/s0031-9422(00)97006-7
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发表时间：
1994-05-01
期刊：
影响因子：
3.8
通讯作者：
SHARMA, RP
中科院分区：
文献类型：
--
作者：
BARUAH, NC;SARMA, JC;SHARMA, RP
测定了两种倍半萜内酯类化合物tagitinin A、tagitinin C和一种黄酮类化合物hispidulin对萝卜、黄瓜和洋葱种子萌发的抑制作用。黄酮类化合物hispidulin对供试作物种子的毒性较大，而tagitinin C的活性较tagitinin A和hispidulin弱。十七个衍生物已制备从tagitinin A和C的化学转化和它们的植物毒性进行了比较与母体化合物（所有在250 μ M），使用萝卜种子。与其生物活性相关的结构要求也已被描述。
Inhibitory effects of two sesquiterpene lactones tagitinin A, tagitinin C and a flavonoid hispidulin isolated from Tithonia diversifolia were determined on germination of radish, cucumber and onion seeds. The flavonoid hispidulin was more toxic to the crop seeds tested and the activity of tagitinin C was weaker than that of tagitinin A and hispidulin. Seventeen derivatives have been prepared from tagitinin A and C by chemical transformation and their phytotoxicity has been compared with the parent compounds (all at 250 mu M) using radish seeds. The structural requirements related to their biological activity have also been delineated.