Endosulfan contaminated soil has become an important risk to the environment and human health worldwide. In the present study, endosulfan tolerant bacterial strain Delftia lacustris IITISM30 and Klebsiella aerogenes IITISM42 were isolated from pesticide stressed agricultural soil and tested for plant growth promoting activities. A pot experiment was performed using Helianthus annuus, grown in soil supplemented with endosulfan and inoculated with pure and consortium of bacterial strain IITISM30 and IITISM42. Inoculation increased plant biomass production and endosulfan degradation, maximum degradation (90% at 5 mg kg⁻¹ of soil) was observed by inoculation with a consortium of bacterial strain IITISM30 and IITISM42. Moreover, there was significantly less endosulfan accumulation was observed in roots and shoots of bacterial inoculated plants as compared to uninoculated plants. Decrease in production of malonialdehyde (MDA) was noticed on inoculation of a bacterial strain. The study demonstrated that inoculation of a consortium of endosulfan tolerant plant growth promoting bacterial isolates could more effectively remediate endosulfan contaminated soils and decrease endosulfan residues in plants, than individual strains. Moreover, it revealed that combined use of H. annuus and endosulfan tolerant bacterial isolates IITISM30 and IITISM42 has great potential for remediating endosulfan contaminated soil.

硫丹污染的土壤已成为全球环境和人类健康的重要风险。在本研究中，从农药胁迫的农业土壤中分离了耐硫丹的细菌菌株Delftia lacustris IITISM30和产气克雷伯氏菌IITISM42，并对其促进植物生长的活性进行了测试。使用向日葵进行盆栽试验，该向日葵在补充硫丹的土壤中生长，并分别接种纯菌种和组合IITISM30和IITISM42。接种增加了植物生物量的产生和硫丹的降解，最大程度地降低了降解（5 mg kg ^-1时为90％通过接种细菌菌株IITISM30和IITISM42的联合体观察到了土壤的污染。此外，与未接种的植物相比，在细菌接种的植物的根和芽中观察到的硫丹积累明显减少。接种细菌菌株后发现丙二醛（MDA）产量下降。该研究表明，与单个菌株相比，接种耐硫丹的植物生长促进协会可分离细菌可以更有效地修复被硫丹污染的土壤并减少植物中的硫丹残留。此外，它表明，联合运用H.向日葵和硫丹宽容细菌分离IITISM30和IITISM42有补救硫丹被污染土壤的巨大潜力。