Relationships between the structure and the phytotoxicity of the fungal toxin tenuazonic acid
作者:M.H. Lebrun、L. Nicolas、M. Boutar、F. Gaudemer、S. Ranomenjanahary、A. Gaudemer
DOI:10.1016/0031-9422(88)80594-6
日期:——
have the optimal structure for phytotoxicity. Tenuazonic acid induces rice leaf defence reactions (browning) of reactive varieties which are resistant to P. oryzae. Some of the analogues synthesized have a low level of phytotoxicity and are able to induce this leaf browning of the reactive rice varieties. Thus different structural features are required for phytotoxicity and for leaf browning.
摘要 Tenuazonic 酸(3-乙酰5-仲丁基吡咯烷-2,4-二酮)是由水稻Pyricularia oryzae 真菌病原体产生的代谢产物。它通过在核糖体水平干扰蛋白质合成来抑制植物的生长。我们已经合成了在 C-3 和 C-5 具有各种取代基的tenuazonic acid 类似物。除了仲丁基或正丙基之外的 C-5 上的取代基降低了类似物的植物毒性。但是 C-3 处的取代消除了毒性。因此,tenuazonic acid 似乎具有最佳的植物毒性结构。Tenuazonic acid 会诱导对米根霉具有抗性的活性品种的水稻叶片防御反应(褐变)。一些合成的类似物具有低水平的植物毒性,并且能够诱导活性水稻品种的叶片褐变。