植物垂直传递内生菌研究进展

Research advances in vertically transmitted endophytes in plants

摘要:

植物内生菌因其与宿主间在空间和功能上的特殊关系，被称为植物的第二基因组，也是植物学和微生物学研究中的共同热点。植物中的内生菌依据其来源方式可分为水平传递内生菌(horizontally transmitted endophytes, HTE)和垂直传递内生菌(vertically transmitted endophytes, VTE)。其中，垂直传递内生菌有机会通过繁殖体(包括有性繁殖体和无性繁殖体)进一步传递到后代植株产生相应的宿主效应。VTE在宿主植物中的行为和功能更类似于宿主的一种获得性 “可遗传”性状，可应用于改良植物性状的生产实践中。因此，针对植物垂直传递内生菌的深入了解和研究无疑具有重要的理论和现实意义。本文综述了目前有关植物VTE的类群、多样性、传递及生理生态功能等方面的研究现状，并对VTE的研究和应用前景进行了展望。

Abstract:

Due to the unique spatial and functional relationship with the host, plant endophytes are known as the second genome of plants and have become a research hotspot of plant sciences and microbiology. According to the origins, plant endophytes can be classified into horizontally transmitted endophytes (HTE) and vertically transmitted endophytes (VTE). Among them, VTEs have the potential to be further transmitted into later-generation plants through propagules (both sexual and asexual propagules) to produce host effects. The behaviors and functions of VTE along host generations are likely to be an acquired “heritable” trait of the host that can be applied in agricultural practices for plant trait improvement. Therefore, in-depth understanding and research on plant VTEs are of great theoretical and practical importance. We reviewed the research advances in the diversity, transmission, and physiological and ecological functions of plant VTEs and provide perspectives for future research and application of VTE resources.