Abstract: Wild rice species are important germplasm resources, which serve as valuable bioresources of functional microorganisms. There are a lot of researches on endophytic nitrogen-fixing bacteria in different host plants at home and abroad, but no report in wild rice. Diverse endophytic bacteria that were found in wild rice at least belongs to 31 generas and 74 species, most of which are facultative endophytic diazotrophs with a wide range of hosts and some of which just had been found for the first time. There is a huge space for the exploration of endophytic diazotrophs in wild rice. The existing research findings focused on the biological characteristics of nitrogen fixing bacteria, such as promote growth and disease resistance aspects. The isolated and identified endophytic diazotrophs in wild rice were summarized and analyzed in this paper, as well as the diversity of their species, habitats and biological functions were comprehensively reviewed, which was aimed to enrich the bioresource of microorganisms used in industrial and agricultural areas, and provide reliable theoretical basis and direction for promoting plant growth and the development of microbial fertilizer.

Key words: wild rice, endophytic diazotrophs, plant-growth promoting, microbial fertilizer

摘要： 野生稻是一种重要的种质资源，也是宝贵的功能微生物资源库。国内外对植物内生固氮菌的研究较多，但野生稻内生固氮菌的相关研究进展未见报道。目前，野生稻内已发现的固氮菌至少有31个属74个种，大部分为兼性内生固氮菌且寄主范围广、分布地域全球化，而部分菌株是首次被发现或被报道具有固氮能力。野生稻内生固氮菌存在巨大发掘空间，现有研究大多集中在其促进生长、抗病害作用等方面。通过归纳统计已分离鉴定的野生稻内生固氮菌，对其物种多样性、生存环境多样性和生物学功能多样性进行了较全面的概述，以期丰富工农业微生物资源库，并为提高作物产量、开发微生物肥料提供可靠的理论依据和方向指引。

关键词: 野生稻, 内生固氮菌, 促进生长, 微生物肥料