King R R, Lawrence C H, Gray J A
Potato Research Centre, Agriculture and Agri-Food Canada, Fredericton, New Brunswick.
J Agric Food Chem. 2001 May;49(5):2298-301. doi: 10.1021/jf0012998.
The thaxtomins are a group of phytotoxins generated by the bacterium Streptomyces scabies (the main causal organism of potato common scab). Available members of the group were assessed for herbicidal activity by a variety of standard tests. Test results indicated that thaxtomin A, the predominant member, was also the most physiologically active. Injury symptoms in most instances were similar to those caused by known cellulose biosynthetic inhibitors such as dichlobenil and isoxaben. Although test results indicated that the thaxtomins had many of the biological properties desirable in a commercial herbicide, they nevertheless lacked the systemic phytotoxicity critical to deliver reliable weed control at low rates.
毒莠定是由疮痂链霉菌（马铃薯普通疮痂病的主要致病有机体）产生的一组植物毒素。通过各种标准测试对该组中现有的成员进行了除草活性评估。测试结果表明，主要成分毒莠定A也是生理活性最强的。在大多数情况下，损伤症状与已知的纤维素生物合成抑制剂如二氯苯腈和异恶草酮所引起的症状相似。尽管测试结果表明毒莠定具有商业除草剂所需的许多生物学特性，但它们仍然缺乏低剂量时实现可靠杂草防除所需的关键系统植物毒性。
