植物根际促生菌促生机理研究

化肥与农药的使用虽能促进植物的生长发育,但剂量过大会造成成本上升、土壤质量下降、环境恶化等不良反应.近年来研究发现存在一类自生型细菌称为植物根际促生菌(Plant growth-promoting rhizobacteria,PGPR),能忍受或抵抗植物所遭受的不利环境,进而促进种子萌发和促进植物生长.文章从PGPR的促进植物吸收营养功能、植物生长调节功能、生物防治性能和环境修复功能4个方面阐述,旨在了解PGPR促进植物生长的原理,找出能改善植株抗逆性,缩短生长周期,促进植株更好更快繁殖的方法.

Plant Growth Promoting Rhizobacteria Promoting Mechanism Research

The use of chemical fertilizers and pesticides could promote the growth and development of plants, however,the excessive doses cause costs to rise, decline in soil quality, environmental degradation and other adverse reactions. Recent studies have found that the PGPR (Plant growth-promoting rhizobacteria, PGPR) could tolerate or resist plant suffered an adverse environment, thus contributing to the promotion of seed germi-nation and plant growth. This article explains the growth promoting mechanism from the PGPR of four aspects , which are about plant nutrition absorption promoting function, plant growth regulating function, biological control performance and environmental restoration function. Understanding the principles of PGPR could promote the growth of plants, find out the method to improve the plant's own resistance, shorten the growth cycle and promote better and faster plant propagation method.