结瘤基因

所得菌株经理化性质和回接试验鉴定为慢生根瘤菌，从而为接着的花生根瘤菌及其结瘤基因的研究提供了基础。

Character and re-inoculation experiment indicated that the strains were Bradyrhizobium sp. ( A rachis ), which provide a base for the coming research of peanut 's nodulation gene .

沙冬青根瘤菌结瘤基因nodAPCR-RFLP分析

PCR-RFLP Analysis of Nodulation Gene nodA of Rhizobia from Ammopiptanthus mongolicus

Frankia基因文库的构建及与根瘤菌结瘤基因区同源克隆的筛选

Construction of Frankia Genomic Libraries and Isolation of Clones Homologous to Modulation Genes from Rhizobium leguminosarum

根瘤菌可在几种豆科植物上成瘤，结瘤基因（nod基因）赋予这些细菌以寄主专一性的方式诱导瘤的形成。

Rhizobia can cause the formation of nitrogen-fixing nodules on the roots of several leguminous plants . The nodulation ( nod ) genes enable bacteria to induce nodule formation in a host-specific manner .

根瘤菌结瘤基因表达后诱导产生结瘤因子。

Nodulation factors are induced when nodulation genes of Rhizobium are expressed .

根瘤菌结瘤基因研究的新进展

Novel advances on nodulation gene study of nodule bacteria

慢生型大豆根瘤菌基因文库的构建和共同结瘤基因的分离

Construction of gene library of Bradyrhizobium japonicum 22-10 and its common nod gene dentification

根瘤菌结瘤基因的表达调控是一个复杂的过程，本文将简要地介绍这方面的研究成果。

In this paper , we would give a brief introduction the research advances on this area .

结瘤基因与豆科宿主之间存在一定的共进化关系。

The occurrence of a certain co-evolution relation has been found between the nodulation genes and the host plants .

表明根瘤菌的结瘤基因很可能在不同的根瘤菌种间发生了水平转移。

The result indicated that the nodA gene of rhizobia probably had transferred between different species in gene level .

根瘤菌的结瘤基因与竞争结瘤基因在根瘤菌与植物共生结瘤的过程中起着关键的作用。

Nodulation genes and genes essential for nodulation competitiveness of Rhizobium play a very important role in the Rhizobium and plant symbiotic nodulation .

这些可作为表达序列标签（EST）的片段为识别新的结瘤素基因提供了可能。

These expressed sequence tags ( EST ) offer the possibility of identifying new nodulin genes .

宿主基因主要是结瘤素基因（ENOD和NOD基因）。

Genes of Leguminous host plant are nodulin genes ( ENOD and NOD ) .

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 .

在水稻基因组中发现有31个与结瘤素基因具有同源性的基因，与相应的结瘤素基因比对，它们的氨基酸序列一致性至少在35%以上。

Thirty-one homologues of nodulin genes were detected in the rice genome which exhibited more than 35 % identities in amino acid sequences in comparison with leguminous nodulin genes .

nfeC基因是从慢生型大豆根瘤菌中克隆到的，与竞争结瘤有关的基因。

It had been shown that nfeC gene was essential for nodulation competitiveness of Bradyrhizobium japonicum .

大豆结瘤性等基因系的性状比较研究

Comparison on the Characters of Nodulated Isogenetic Lines in Soybean

豆科植物感知结瘤因子，改变一系列与结瘤相关基因的表达，引起表皮细胞膜去极化，细胞质钙离子浓度急增，根毛变形和皮层细胞的分裂，最终形成根瘤。

Perception of Nod factors by plant induces genes expression relative to nodulation and leads to depolarization of the plasma membrane , Ca2 + spiking in cytosolic , root hair deformation and cortical cell division that ultimately result in development of the nodule .

简要综述了目前根瘤菌结癌基因研究的3个热点方向，即结瘤因子、nodlD基因的调控和结瘤基因系统发育分析的新进展。

Three hot research directions of rhizobial nodulation genes , i. e. novel advances on Nod factor , regulation of nod D , and phylogenic analysis of nodulation genes were summarized in this paper .

结瘤因子信号能够诱导豆科植物根毛细胞质膜去极化、离子流动和早期结瘤素基因的表达以及根毛变形、皮层细胞分裂和根瘤原基形成等与共生有关的表型变化。

These include depolarization of the membrane potential in epidermal cells , specific expression of early nodulin genes and changes in the flux of calcium in root hairs , deformation of root hairs , cell division in the root cortex and formation of the nodule primordium .