News Column

Studies from University of Hong Kong in the Area of Nitrogen Compounds Reported

June 4, 2014

By a News Reporter-Staff News Editor at Biotech Week -- Fresh data on Nitrogen Compounds are presented in a new report. According to news originating from Hong Kong, People's Republic of China, by NewsRx correspondents, research stated, "The effects of acetate and leaf litter powder on ammonia/ammonium-oxidizing microorganisms (AOMs) in mangrove sediment were investigated in a laboratory incubation study for a period of 60 days. The results showed that different AOMs responded differently to the addition of acetate and leaf litter."

Our news journalists obtained a quote from the research from the University of Hong Kong, "A higher diversity of anaerobic ammonium-oxidizing (anammox) bacteria was observed when acetate or leaf litter was added than the control. However, acetate and leaf litter generally inhibited the growth of anammox bacteria despite that leaf litter promoted their growth in the first 5 days. The inhibitory effects on anammox bacteria were more pronounced by acetate than by leaf litter. Neither acetate nor leaf litter affected ammonia-oxidizing archaea (AOA) community structures, but promoted their growth. For ammonia-oxidizing bacteria (AOB), the addition of acetate or leaf litter resulted in changes of community structures and promoted their growth in the early phase of the incubation. In addition, the promoting effects by leaf litter on AOB growth were more obvious than acetate. These results indicated that organic substances affect AOM community structures and abundances."

According to the news editors, the research concluded: "The study suggests that leaf litter has an important influence on the community structures and abundances of AOMs in mangrove sediment and affects the nitrogen cycle in such ecosystem."

For more information on this research see: Differential responses of ammonia/ammonium-oxidizing microorganisms in mangrove sediment to amendment of acetate and leaf litter. Applied Microbiology and Biotechnology, 2014;98(7):3165-3180. Applied Microbiology and Biotechnology can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer -; Applied Microbiology and Biotechnology -

The news correspondents report that additional information may be obtained from Y.F. Wang, University of Hong Kong, Swire Inst Marine Sci, Hong Kong, Hong Kong, People's Republic of China. Additional authors for this research include X.Y. Li and J.D. Gu (see also Nitrogen Compounds).

Keywords for this news article include: Asia, Ammonia, Hong Kong, Nitrogen Compounds, People's Republic of China

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Source: Biotech Week

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