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汉语拼音：gēn liú jūn

侵入豆科植物根部形成根瘤的一类共生固氮菌。它从植物体内吸取养料，同时固定空气中游离的氮，为植物提供氮素养料。如大豆根瘤菌等。

1. 一种细菌。与豆科植物共生，在其根部形成根瘤。植物供给根瘤菌以矿质养料和能源，根瘤菌固定大气中的游离氮气，为植物提供氮素养料。农业上利用根瘤菌拌种，可提高作物产量。

• Further research will , no doubt , be aimed towards further characterization of both Rhizobium and plant genes .

  勿庸置疑，今后的研究应该进一步认识根瘤菌和植物双方基因的特征。

• These strains were used for further study for influence of nitrogen levels on their nodulation and nitrogen fixation efficiency.

  研究了接种根瘤菌时，氮肥水平对大豆结瘤固氮和产量影响的小区试验。

• Rhizobia are able to induce the organogenesis of root nodules on leguminous plants and reduce atmospheric nitrogen into ammonia.

  根瘤菌与豆科植物共生固氮而在农业和生态环境中具有重要作用。

• However, bacteria fix the gas only when their population is high enough to trigger the quorum-sensing machinery.

  然而，只有在细菌（根瘤菌）达到一定数量时引发群体感应机制才能进行固氮。

• Nodules are not found on all species of legumes , nor are all species of Rhizobium capable of making nodules on leguminous plants.

  不是所有的豆类植物中都能找到根瘤，也不是所有的根瘤菌都能在豆类植物中形成根瘤。

• The taxonomic systems of Rhizobia can be divided into early Rhizobium taxonomic system and latter-day Rhizobium taxonomic system.

  根瘤菌的分类系统可分为早期根瘤菌的分类系统和现代根瘤菌的分类系统两个阶段。

• Rhizobia proliferate along the infection thread and eventually invade the cytoplasm of root cortical cells.

  根瘤菌沿着侵入线增殖，最终侵入皮层细胞的细胞质。

• Nodulation genes expression and regulation of Rhizobium play a very important role in the Rhizobium and plant symbiotic nodulation.

  根瘤菌结瘤基因的表达调控在根瘤菌与植物的共生结瘤过程中起着十分重要的作用。

• Like rhizobia, the nitrogen-fixing endophyte Frankia elicits the formation of specialized root nodule structures which house BNF processes.

  像根瘤菌一样，固氮的内寄生弗兰克氏菌能够诱发特殊的根瘤结构，在其中进行生物固氮过程。