ABSTRACT

Current experiments were done to isolate plant growth-promoting rhizobacteria (PGPR) from peach (Prunus persica) rhizosphere having biocontrol, biodegradation and defence mechanism activation against pesticide toxicity. PGPR strains (Pseudomonas and Bacillus) showed biocontrol activity against phytopathogens. Bacillus flexus PS-26 tolerated a maximum amount of chlorpyrifos and was also able to degrade different concentrations of chlorpyrifos within 30 h. Bacillus flexus PS-26 formed more biofilm, released a high amount of antioxidants and exopolysaccharides under chlorpyrifos stress, which suggested its detoxification role. The present study proved Bacillus flexus PS-26 to be a super-bioinoculant, which could protect plants against pesticide.

摘要

目前的实验是从桃（Prunus persica）根际中分离出植物生长促进根际细菌（PGPR），具有生物防治、生物降解和针对农药毒性的防御机制激活。PGPR 菌株（假单胞菌和芽孢杆菌）对植物病原体显示出生物防治活性。弯曲芽孢杆菌PS-26 耐受最大量的毒死蜱，并且还能够在 30 小时内降解不同浓度的毒死蜱。Bacillus flexus PS-26在毒死蜱胁迫下形成更多的生物膜，释放出大量的抗氧化剂和胞外多糖，表明其具有解毒作用。本研究证明弯曲杆菌 PS-26 是一种超级生物接种剂，可以保护植物免受农药侵害。