Key Laboratory for Space Bioscience & Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, PR China.
Assistant Prof. Head Department of Microbiology, Women University Mardan, Khyber Pakhtunkhwa, Pakistan.
J Hazard Mater. 2019 Jul 15;374:58-65. doi: 10.1016/j.jhazmat.2019.03.130. Epub 2019 Apr 1.
Plant-bacterial mutualism has tremendous potential for remediation of herbicide contaminated soils. Generally, bacterial inoculation helps plants to grow well in the contaminated environment. Here, we investigated the impact of bispyribac sodium (BS) degrading bacterial consortium (BDAM) on BS remediation, plant growth promotion and BS accumulation in plant parts. Wheat (Triticum aestivum) was planted in BS spiked soil and inoculated with BDAM. Inoculation showed a beneficial effect on plant biomass production and degradation of BS in the rhizosphere and the rhizosheath. After 40 and 60 days of inoculation, the degradation of BS was more than 96% and approximately 100% respectively in the planted and inoculated soil spiked with 2 and 5 mg kg BS. However, in planted and un-inoculated soil, the degradation of BS was 72% after 60 days of sowing. Furthermore, inoculated bacterial strains colonized both in rhizo- and endosphere of the inoculated plants. In comparison with the un-inoculated soil, significantly less accumulation of BS was found in the roots and shoots of the plants growing in inoculated soil. We report the efficiency of plant-bacterial partnership for enhanced biodegradation of BS and to eliminate the BS residual toxicity to non-target plants.
植物-细菌共生关系具有修复受除草剂污染土壤的巨大潜力。通常，细菌接种有助于植物在污染环境中良好生长。在这里，我们研究了双草醚降解细菌联合体（BDAM）对双草醚修复、植物生长促进和植物各部分双草醚积累的影响。将小麦（Triticum aestivum）种植在添加了双草醚的土壤中，并接种 BDAM。接种对植物生物量生产和根际及根鞘中双草醚的降解表现出有益的影响。接种后 40 和 60 天，在种植和接种土壤中分别添加 2 和 5mg/kg 双草醚，双草醚的降解率分别超过 96%和 100%。然而，在种植和未接种土壤中，播种 60 天后双草醚的降解率为 72%。此外，接种的细菌菌株在接种植物的根际和内圈都有定殖。与未接种土壤相比，在接种土壤中生长的植物的根和茎中，双草醚的积累明显减少。我们报告了植物-细菌伙伴关系提高双草醚生物降解效率和消除双草醚对非目标植物残留毒性的效率。
