Still G G
Crops Research Division, Agricultural Research Service, United States Department of Agriculture, Metabolism and Radiation Research Laboratory, State University Station, Fargo, North Dakota 58102.
Plant Physiol. 1968 Apr;43(4):543-6. doi: 10.1104/pp.43.4.543.
3,4-Dichloropropionanilide-(14)C (propanil) labeled in either the C-1 or C-3 carbon atoms of the propionic acid moiety was applied to the roots of pea (Pisum sativum L.) and rice (Oryza sativa L.) plants in nutrient solution (0.1 mm-0.28 mm). Radioactivity was detected throughout the treated plants, but the greatest labeling was found in the roots. None of the products that contained aniline were radioactive, suggesting that the plants split the propionic acid moiety from propanil. The fate of the propionate moiety of propanil was determined by recovery of (14)CO(2) from plants exposed to propanil-(14)C. The time-course of the (14)CO(2) production demonstrated that the intact propionic acid was cleaved from the propanil and subsequently catabolized by the beta-oxidation catabolic sequence. The appearance of radioactivity in the shoots was attributed to the incorporation of products of propionate metabolism. Both the susceptible pea plants and the tolerant rice plants converted a high percentage of the administered propanil-(14)C to (14)CO(2).
在丙酸部分的C-1或C-3碳原子上标记有3,4-二氯丙酰苯胺 -（14）C（敌稗）的溶液（0.1毫米 - 0.28毫米）被施用于营养液中豌豆（Pisum sativum L.）和水稻（Oryza sativa L.）植株的根部。在整个处理过的植株中都检测到了放射性，但在根部发现的标记最多。所有含苯胺的产物均无放射性，这表明植物将丙酸部分从敌稗中分离出来。通过从暴露于敌稗 -（14）C的植物中回收（14）CO₂来确定敌稗丙酸部分的去向。（14）CO₂产生的时间进程表明，完整的丙酸从敌稗中裂解出来，随后通过β-氧化分解代谢序列进行分解代谢。地上部分放射性的出现归因于丙酸代谢产物的掺入。易感的豌豆植株和耐受的水稻植株都将施用的大部分敌稗 -（14）C转化为（14）CO₂。
