Asnodf32,a late nodulin gene in Astragalua sinicus,was firstly isolated by Natio et al. . It encodes a nodule-specific cysteine proteinase.
Asnodf32是由Natio等从紫云英中分离到的一个晚期结瘤素基因,编码一个根瘤特异表达的半胱氨酸蛋白酶。
参考来源 - 半胱氨酸蛋白酶基因Asnodf32在紫云英根瘤衰老过程中的功能研究According to the expression time, nodulin genes were divided as early nodulin genes and late nodulin genes.
根据表达时间的先后,它可分为早期结瘤素基因和晚期结瘤素基因。
参考来源 - 豌豆早期结瘤素基因克隆与凝集素基因psl转化烟草研究·2,447,543篇论文数据，部分数据来源于NoteExpress
这表明在水稻基因组中广泛存在豆科植物结瘤素基因的同源基因。
This result indicated that leguminous nodulin homologous genes existed extensively in rice genome.
推测在水稻中可能存在结瘤因子所诱导的豆科早期结瘤素表达的类似机制。
Moreover, GUS gene expression driven by the Gmenod2B promoter in transgenic rice was regulated by nitrogen status.
推测可能是由于水稻中缺少了这些豆科结瘤素基因，导致水稻不能结瘤固氮。
It was suggested that the lack of these leguminous nodulin genes in rice might result in its disablility for nodulation and nitrogen fixation.
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