根瘤菌生物地理学的研究进展

Advances in biogeography of rhizobia

摘要:

根瘤菌是一类革兰氏阴性菌，能与特定的宿主植物共生形成根瘤，将空气中的分子态氮转变为植物可以利用的氨态氮。研究根瘤菌的生物地理分布格局及形成机制，不仅具有理论上的意义，还对根瘤菌接种剂的选择具有指导意义。目前，随着分子生物学技术的发展，以及根瘤菌多样性研究数据的积累，根瘤菌生物地理学取得了较大的进展。本文综述了根瘤菌生物地理学的研究方法及现状，并对今后的重点研究方向作了展望。

关键词:根瘤菌;系统发育分类;生物地理学

Abstract:

Rhizobia are Gram-negative bacteria that can form a nodule with specific host plants, which can transform nitrogen in the air to ammonia nitrogen for plant utilization. Studying on the biogeographical pattern of the rhizobia is not only theoretically meaningful, but also helpful to guide the selection of rhizobial inoculant. At present, with the development of molecular biotechnology, and the accumulation of rhizobia diversity research data, rhizobial biogeography has got great progress. This paper summarizes the current researches of rhizobial biogeography, and indicates the direction in future research.

Key words:rhizobia;phylogenetic classification;biogeography