植物根围促生细菌(PGPR)对黄瓜生长及生理生化特性的影响

Effects of plant-growth promoting rhizobacteria on growth and physiological activities of cucumber

为了解植物生长促生细菌CH1与CH2对黄瓜生长及品质的作用机制,采用种子催芽、温室盆栽与生理生化的方法,研究了其对黄瓜生长及生理代谢的影响.结果表明,CH1与CH2对黄瓜种子萌发、根与植株的生长有显著促进作用,根部与叶部中超氧阴离子产生速率、H2O2和丙二醛(MDA)含量显著减少,与品质相关的叶绿素、蛋白质、可溶性糖和VC含量显著增加..

In order to explore the functionary mechanism of plant growth-promoting rhizobacteria （PGPR） CH1 and CH2 to cucumber growth and quality, the seed germinating, greenhouse pot planting and physiological and biochemical methods was employed to study the effects of CH1 and CH2 on growth and physiological metabolism of cucumber. Results showed that PGPR CH1 and CH2 obviously promoted germinating of cucumber seeds, root and plant growth, as well as the superoxide anionproducing rate, contents of H2 O2 and MDA in roots and leaves of cucumber were considerably decreased after treatment with CH1 and CH2, contents of chlorophyll, protein, soluble sugar and Vc which are related with cucumber quality were magnificently increased.