中文摘要：

分析不产氧光合细菌海洋着色菌Marichromatium gracile YL28静息细胞对无机三态氮（氨氮、亚硝氮和硝氮）的去除和相互转化作用.结果表明：在适宜温度和pH值的厌氧环境中,YL28菌株静息细胞对亚硝氮和硝氮具有良好的去除能力,并且能将氨氮转化为少量的硝氮、将亚硝氮动态地转化为硝氮,硝氮也能动态地转化为亚硝氮,但未检测到将硝氮和亚硝氮转化为氨氮的过程.由此可知,YL28菌株的静息细胞具有良好的反硝化作用,能够去除水体中的亚硝氮和硝氮.

英文摘要：

The progress of removal and transformation of inorganic nitrogen including ammonium,nitrite,and nitrate by the resting cells of Marichromatium gracile YL28 were investigated in this work.The YL28 resting cells could remove nitrite and nitrate efficiently under the anaerobic condition with appropriate temperature and pH value.They also showed a low transformation capability of ammonium to nitrate,and the reciprocal transformation between nitrite and nitrate could be detected,followed by nitrite or nitrate products disappeared.But the transformation of nitrite and nitrate into ammonium could not be detected.These results demonstrated that the YL28 resting cells could remove nitrite and nitrate from waters efficiently,suggesting that the strain YL28 possesses good capability of anaerobic denitrification.