基于CNKI数据库的禾草与非禾草内生真菌文献计量分析

为明确我国关于内生真菌的研究现状及热点，以1999-2019年中国知网（CNKI）数据库中内生真菌为关键词的相关文献为数据源，从检索结果中手动选择禾草与非禾草内生真菌相关文献，进行了文献计量学分析。共检索出5333篇与内生真菌相关的文献，其中377篇与禾草Epichlo?属内生真菌相关文献。结果表明，非禾草内生真菌相关文献的发文量呈线性增长，增长速度较快，禾草内生真菌相关文献增长缓慢，具有巨大的研究发展潜力。禾草内生真菌与非禾草内生真菌的研究方向均在生物、作物等学科占有较大比例。其中禾草内生真菌的期刊来源主要是《草业科学》，主要进行禾草内生真菌的研究机构为兰州大学、南开大学、南京农业大学等，非禾草内生真菌的期刊来源主要是《天然产物研究与开发》《安徽农业科学》等杂志，主要的研究机构为西北农林科技大学、云南大学、海南大学等。国家自然科学基金是内生真菌研究的主要经费支持，对于内生真菌的研究和发展具有重要作用。在以内生真菌为关键词检索出的文献中，于2001年发表于菌物系统上的《内生真菌研究进展》引用次数最高，引用频次高达819次，在禾草内生真菌中《禾草-内生真菌共生体在草地农业系统中的作用》引用次数最高，引用频次高达172次，为内生真菌以及禾草内生真菌的研究奠定了基础。从禾草内生真菌相关文献中的高频关键词可知，内生真菌对宿主抗逆性的生理生化机制以及共生体所产生的次生代谢物的相关研究为目前的研究热点。根据禾草内生真菌以及非禾草内生真菌的研究现状，展望了内生真菌研究的发展趋势，应更多地聚焦于内生真菌的功能挖掘，宿主互作机制，抗逆性机制以及内生真菌的利用等方面。

Bibliometric analysis of research on endophytic fungi in grasses and non-grasses based on the CNKI database

The aim of this study was to clarify the research status and hotspots for endophytic fungi in China， based on relevant literature published between 1999 and 2019 and listed in the Chinese National Knowledge Infrastructure （CNKI） database. Literature related to endophytic fungi in grasses and non-grasses was manually selected from the search results， and a bibliometric analysis was carried out. A total of 5333 articles related to endophytic fungi were found， of which 377 were related to the endophytic fungus Epichlo? found in grasses. Analyses of publication frequency showed that the number of articles related to non-grass endophytic fungi has increased linearly with a rapid rate of increase， while the number of articles related to grass endophytic fungi has increased slowly， suggesting that there is great potential for research and development in that area. Research papers on endophytic fungi in grasses and non-grasses account for a large proportion of publications in the areas of biology， crops， and other disciplines. The main journal publishing papers on grass endophytic fungi is “Pratacultural Science”， and the main research institutions engaged in research on grass endophytic fungi are Lanzhou University， Nankai University， and Nanjing Agricultural University. The main journals publishing papers on non-grass endophytic fungi are “Natural Product Research and Development” and “Journal of Anhui Agricultural Sciences”， and the main research institutions engaged in research on that topic are the Northwest Agriculture and Forestry University， Yunnan University， and Hainan University. The National Natural Science Foundation of China is the main source of financial support for research of endophytic fungi， and plays an important role in furthering research and development in this area. Among the published papers found using ‘endophytic fungi’ as key words， ‘Advances of researches on endophytic fungi’ published in Mycosystema in 2001 had the most citations （819）. Among the topics related to grass endophytic fungi， ‘Roles of grass endophyte-netyphodium association in pastoral agriculture systems’ was the most frequently cited （172）. Analyses of high-frequency keywords related to endophytic fungi in grasses revealed that the current research hotspots are the physiological and biochemical mechanism of resistance of endophytic fungi to hosts-defenses， and the secondary metabolites produced by symbionts. This bibliometric analysis indicates that there is an increasing trend to study endophytic fungi in grasses and other plants. Areas for further research are the functional mining of endophytic fungi and host-endophyte interaction mechanisms. Understanding the mechanism of stress resistance will be useful for developing strategies to extend the utilization of endophytic fungi.