Sampaio Carla J S, de Souza José R B, Damião Aldinéia O, Bahiense Thiago C, Roque Milton R A
1Laboratório de Microbiologia Aplicada e Bioprospecção, Departamento de Biointeração, Instituto de Ciências da Saúde, Universidade Federal da Bahia (UFBA), Campus Canela, Salvador, Bahia 40110-100 Brazil.
2Laboratório de Física Nuclear Aplicada, Departamento de Física da Terra e do Meio Ambiente, Instituto de Física, Universidade Federal da Bahia (UFBA), Campus Ondina, Salvador, Bahia 40170-140 Brazil.
3 Biotech. 2019 Apr;9(4):155. doi: 10.1007/s13205-019-1686-8. Epub 2019 Mar 27.
In this study, L. mangrove plants and plant growth-promoting bacteria were evaluated for their ability to degrade polycyclic aromatic hydrocarbons in diesel oil-contaminated sediment. The diesel-contaminated soil was sown with plant growth-promoting bacteria in the L. rhizosphere and monitored for 120 days in a greenhouse. The plant growth-promoting bacteria and sp. were analyzed for their ability to degrade eight priority polycyclic aromatic hydrocarbons, achieving a removal rate for naphthalene (80%), acenaphthene (> 60%), anthracene (> 50%), benzo(a)anthracene (> 60%), benzo(a)pyrene (> 50%) and dibenzo(a,h)anthracene (> 90%) in the treatments with and without plants. L. demonstrated a removal rate above 50% for acenaphthene and fluoranthene. The bacterial strains promoted the development of the plant propagule in 55% of sediment contaminated with diesel. Scanning electron microscopy revealed the formation of biofilms by the strains in the roots of the plants in contact with the diesel. Thus, the interaction between L. and the bacterial strains ( sp. and ) demonstrated the potential of the strains to degrade diesel and bioremediate mangroves impacted by diesel oil.
在本研究中，对红树植物和植物促生细菌降解柴油污染沉积物中多环芳烃的能力进行了评估。在柴油污染土壤的红树植物根际接种植物促生细菌，并在温室中监测120天。分析了植物促生细菌和 菌对8种优先多环芳烃的降解能力，在有植物和无植物处理中，萘的去除率达到80%，苊烯的去除率大于60%，蒽的去除率大于50%，苯并(a)蒽的去除率大于60%，苯并(a)芘的去除率大于50%，二苯并(a,h)蒽的去除率大于90%。红树植物对苊烯和荧蒽的去除率高于50%。在55%的柴油污染沉积物中，这些细菌菌株促进了植物繁殖体的发育。扫描电子显微镜显示，这些菌株在与柴油接触的植物根部形成了生物膜。因此，红树植物与细菌菌株（ 菌和 菌）之间的相互作用表明，这些菌株具有降解柴油和对受柴油影响的红树林进行生物修复的潜力。
