论文部分内容阅读
红树林是连接陆地和海洋的重要生态系统,由于潮汐活动,氧化还原条件表现出明显的昼夜间的交替,这一生态体系中不但有大量的动植物种类,同时还有数量极高的不同种类的细菌,包括好氧和厌氧类型,厌养的硫酸(盐)还原菌已证实在降解多环芳烃有机物方面有其独特的生化优势,但从红树林中分离出的此类纯细菌还很少,在降解方面,已初步确定萘的厌氧降解途径异于好氧细菌,厌氧降解时的一系列代谢中间产物也有明显的专一性,羰基化反应是开始的一个重要步骤,而后的每步生化反应还有待进一步验证。从现有的结果可以看出,红树林中厌养的硫酸还原菌应在降解多环芳烃有机物中起到非常重要的作用。
Mangroves are important ecosystems connecting land and sea. Due to tidal activity, redox conditions show obvious day and night alternations. There are not only a large number of flora and fauna in this ecosystem, but also a very large number of different species Bacteria, including aerobic and anaerobic types, and anaerobic sulfate-reducing bacteria have demonstrated their unique biochemical advantages in detoxifying PAHs, but such pure bacteria isolated from mangroves are still Less, in terms of degradation, it has been initially determined that the anaerobic degradation pathway of naphthalene is different from that of aerobic bacteria. A series of metabolic intermediates during anaerobic degradation are also obviously specific. The carbonylation reaction is an important step in the beginning. Biochemical reactions per step have yet to be further verified. From the existing results, it can be seen that the sulfur-reducing bacteria that are not used in mangrove forests should play a very important role in the degradation of PAHs.