芳氧苯氧丙酸酯和环己二酮类除草剂的作用机制

The Mechanisms of Action of APP and CHD Herbicides

报道了两类除草剂芳氧苯氧丙酸酯（ＡＰＰ）和环己二酮（ＣＨＤ）的四种主要的除草作用机制。其中，ＡＣＣ酶是它们公认的作用靶标；膜电位去极化是目前仍在争议中的作用机制；三酮类ＣＨＤ能够抑制ＨＰＰＤ酶的活性；肟醚类ＣＨＤ则可作为光电子传递抑制剂。文中还介绍了基于ＡＣＣ酶设计的新抑制剂。

Four main mechanisms of the action of aryloxyphenoxypropionate (APP)and cyclohexanedione(CHD)herbicides have been reported.There is strong evidence that they inhibit ACCase,a key enzyme that catalyzes the first committed step in de novo biosynthesis of fatty acids.The depolarization of Em is a controversial mode.CHD with a benzoyl group could inhibit plant HPPDase,a component of the biosynthetic pathway to plastoquinone and α-tocopherol,while CHD with an enamine moiety are potent electron transport inhibitors.The design of novel graminicides based on ACCase is introduced.