根瘤菌

We studied root nodule proliferation, nodule microstructure, genetic cluster and stress resistance of the rhizobium of Trigonella arcuata.

对弯果胡卢巴根瘤增殖特性、根瘤显微结构、根瘤菌遗传聚类以及根瘤菌各种抗性进行观察、分析和鉴定。

The research analyzed the possibility which two methods were applied to rhizobia taxonomy, and opened up new idea.

探讨现代分析仪器在根瘤菌分类研究中应用的可行性，为根瘤菌多样性及分类研究方法的探索提供新的思路。

This paper presents a review of the main methods of the polyphasie taxonomy system and the phylogeny of rhizobia.

文中主要阐述了根瘤菌多相分类体系中的主要方法及现代根瘤菌系统发育地位的研究和进展。

In recent years it has made great development on the taxonomy and phylogeny with the discovery of new rhizobia resource and application of molecular methods.

近年来对新的根瘤菌资源的不断发掘及现代分子生物学技术的发展和应用使根瘤菌分类研究有了突破性进展。

With the giant 201 alfalfa varieties match highly effective nodulestrain is SM29, SM32, SM33 and SM35, after vaccinates above four kind of strains, entire nitrogencontentequally grew compared to the comparison 27.38%; A high comparison equally grew60.27%; The aerial parts dry weight grew 2～3 to double, separately grew 327.00%, 300.65%,280.56% and 279.70%; After the vaccination fresh weight and the comparison compares alsohas theremarkable enhancement, separately grew 148.12%, 132.64%,121.34% and 121.76%.

田间小区试验结果表明，与巨人201高效匹配的根瘤菌株是SM29、SM32、SM33和SM35，接种后其全氮含量分别为27.11％、26.78％、28.92％、27.5％，而对照仅为21.65％；地上部分干重与对照相比，有显著性的增长，分别增长了280.56％、327.00％、300.65％和279.70％，增长了1～3倍，有效地提高了紫花苜蓿的干草产量；接种后地上部分植株高度分别为102.67cm、100.17cm、94.25cm、102.50cm，而对照植株高度为62.33cm；接种这四种根瘤菌，接种效果明显，大大提高了巨人201的鲜草产量，分别比对照增长了121.34％、148.12％、132.64％和121.76％。

Infection of legume roots begins with attachment of rhizobia to the root surface Biochemical signals are exchanged between the partners and then rhizobia invade the root hairs through an infection thread.

根瘤菌先接触被侵染的作物根的表面，互相交换生化信号后，根瘤菌通过侵入线侵入根毛。

It was proved that the survival dynamics of rhizobia tested in the sterilized pot-soil microcosms was significantly different from that of the non-sterilized pot-soil microcosms.

发现在灭菌土和非灭菌土缩影中供试根瘤菌的存活动态之间有显著差异，说明了在未灭菌土中存在来自生物因素的干扰并影响了引入根瘤菌的生长、繁殖和存活。

Soybean planted in the yellow brown soil, althongh they had big difference in nodule numbers caused by different inoculation methods, there were no difference in the fresh shoot weight because of the poor nutritional conditions. Soybean planted in the brown soil, the difference between different inoculations and fresh shoot weight were obviously because of the balance nutritional conditions. Although there were big difference in nodule numbers when soybean were planted in the peat, there were no difference in the fresh shoot weight, this might be caused by peat, the peat were not a natural soil type and the nutritional conditions might be unbalance.

分期采样的结果表明，黄棕壤中栽种的大豆，虽然接种根瘤菌对结瘤作用有较大的影响，但由于黄棕壤的肥力状况欠佳，而对豆科植物地上部分生长的影响未显出作用；棕壤土中栽种的豆科植物，接种根瘤菌在结瘤方面和植物地上部分生长方面，由于土壤肥力状况较为平衡，均表现出明显的效果；草炭土中生长的豆科植物在结瘤方面虽然表现出较大差异，但由于这种土壤的肥力状况不适于豆科植物的生长，而使地上部的生长也未形成统计上的差异。

This thesis reviewed the historical development, the current taxonomic status and the phylogeny of rhizobia, and compared the main methods applied in rhizobial polyphasic taxonomy.

本论文综述了根瘤菌的分类现状、系统发育地位及有关的研究方法；采用数值分类、16S rDNA PCR-RFLP、BOX-PCR、AFLP、16S rDNA 序列分析、G+Cmol%测定、DNA-DNA同源性分析等多相分类技术对分离自我国不同地区的木本豆科植物刺槐、黄檀、合欢根瘤菌进行了系统地分类学上的研究。

Root nodule formed by gene marker strains would have color reaction with the test reagent. This characteristic can be used to detect effect of Mo and its application rate on the effectiveness and competitiveness of the peanut-Bradyrhizobium symbiosis.

通过标记根瘤菌形成的根瘤能与检测试剂产生颜色反应的特征，检测施钼及施不同浓度的钼对花生－根瘤菌有效性和竞争性的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。