土壤有益细菌在植物根际竞争定殖的影响因素

Factors affecting the competitive colonization of beneficial bacteria in plant rhizosphere:A review

在土壤有益微生物应用于生物肥料、生物杀虫剂、植物生长刺激剂和生物处理剂的过程中,根际定殖具有重要作用。细菌在植物根际定殖是一个比较复杂的过程,影响定殖能力的因素也是复杂多样的。本文综述了参与根部竞争定殖的生物因素,包括受细菌遗传控制的某些特性如鞭毛/运动性、趋化性、多糖、位点特异重组酶/菌落阶段变异、NADH脱氢酶,植物根的分泌物和植物种类等;影响微生物根际定殖的非生物因素如土壤类型、土壤特性和土壤温度等,探讨了影响微生物根际定殖的主要研究方向。

Rhizosphere competitive colonization is of significance in the applications of soil beneficial microbes as biofertilizer, biopesticide, phytostimulator and bioremedlator. The competitive colonization of bacteria in plant rhizosphere is a complicated process, and the factors affecting the colonization are complex and numerous. This paper reviewed the biotic factors involving in the competitive colonization, including the traits controlled by bacterial genes, e. g. , flagella/motility, chemotaxis, polysaccharide, site-specific recombinase/phase variation and NADH dehydrogenase, and the root exudates and plant species, as well as the abiotic factors affecting the colonization, such as soil type, soil property, and soil temperature. The future research directions on the competitive colonization of beneficial bacteria in plant rhizosphere were also discussed.