植物根际促生菌(PGPR)的研究与应用前景

植物根际微生物主要以细菌为主，多样性高且活跃，分为有益菌（2 % ~ 5 %）、有害菌（8 % ~ 15 %）以及中性菌（80 % ~ 90 %）。从有益菌中筛选出的植物根际促生菌（Plant Growth Promoting Rhizobacteria，简称PGPR）具有促进植物生长、防治病害等功能，成为土壤科学领域的研究热点。本文目的是了解PGPR在国内外的研究现状，寻求高效、长效且安全的开发与利用方式对PGPR促生及生物防控功能具有重要意义。基于Web of Science核心合集数据库，采用CiteSpace、VOSviewer、HistCite等工具对PGPR研究领域的发文数量与学科分布、发文国家及机构间的合作关系、发文期刊、主要研究热点以及发展趋势等进行了计量分析。结果表明：① 印度、中国、美国、巴基斯坦、德国等国在该领域发文的引用频次较高，研究较为深入。②全球对PGPR研究的重视程度越来越高，主要集中于植物科学学科与微生物学学科。③ 发文主要期刊有Frontiers in Microbiology、Frontiers in Plant Science及Plant and Soil，关键文献中PGPR的促生、抗胁迫、污染修复等内容占据较高比例。④ 关键词聚类主要分为生物修复功能与措施、PGPR的促生及胁迫耐受性等、根际功能菌群的种类及系统抗性、根际菌群促生及生物防控功能等4类。生物防控是PGPR领域的一个研究热点，该领域未来研究趋势主要集中于PGPR及其它土著菌群与植物之间的互作关系以及PGPR高效应用的方式等。

Going back to the roots: the microbial ecology of the rhizosphere

Bacteria is the main part of plant rhizosphere community, with high diversities and activities. They are divided into 2%-5% beneficial bacteria, 8%-15% pathogens and 80%-90% neutral bacteria. Plant growth promoting rhizobacteria (PGPR) selected from beneficial bacteria observed the function of promoting plant growth and preventing soil-borne diseases, which have become a research hotspot in soil science. So the aims were to review the research situation on PGPR, and to develop more efficient, long-term and safe utilization of PGPR in future. A bibliometric analysis by using CiteSpace, VOSviewer and HistCite was used to count the number of publications and their distributions in contributor countries, disciplines, publishing journals and hotspots in PGPR field based on Web of Science database. ① India, China, Pakistan and the United States were the major contributors of academic publications in this field, and cooperated closely with each other. ② Research in this field attracted growing attention worldwide between 2000 to 2022, and mainly categories of the publications were plant science and microbiology. ③