野生大豆植株中,合成酰脲的三种关键酶中的黄嘌呤脱氢酶,尿酸酶只存在于根瘤中,而尿囊素酶存在于所有器官。茎和荚皮中的尿囊素和尿囊酸含量较高,茎尿囊素和尿囊酸含量高峰在结荚后期,荚皮尿囊素和尿囊酸含量在结荚初期最高,以后迅速下降,根瘤尿囊素酶活性较其它器官高,在整个生育期中以结荚后期最高。荚皮中尿囊素和尿囊酸含量明显高于籽粒,而籽粒中尿囊素酶活性是荚皮1—3倍。 In wild soybean plants, xanthine dehydrogenase and uricase, which are the three key enzymes in the synthesis of ureides, exist only in nodules, while allantoin is present in all organs. The allantoin and allantoic acid contents in the stems and the pod shell were higher. The peak contents of allantoic acid and allantoic acid in the stems and pods were at the late podding stage. The contents of allantoic acid and allantoic acid in the pod skin were the highest at the early stage of podding. Decreased, and the activity of root nodular allantozymes was higher than that of other organs. The highest nodular stage was observed in the whole growth period. The content of allantoin and allantoic acid in the pod skin was significantly higher than that of the grain, while the activity of allantoin in the grains was 1-3 times higher than that of the pod.