[Three dimensional fluorescence excitation-emission matrix spectrum of dissolved organic substance in marine microalgaes growth process].
The three-dimensional fluorescence spectrum was used to detect the changes in dissolved organic substances from the cultured Skeletonema costatum , Alexandrium tamarense, Alexandrium mimutum, Scrippsiella trochodea, Prorocentrum donghaiense and Prorocentrum micans. The result indicates that all of the miroalgaes can produce FDOM in the growth courses. Diatom such as Skeletonema costatum can produce humic-like FDOM. However dinoflagellate can produce protein-like FDOM at exponential growth phase. When the algae grows into decadency phase, the intensity of humic-like and protein-like fluorescence augments rapidly, which may be due to a mass of FDOM realeased by the old or dead cell fragmentation and the degradation of bacteria by using non-FDOM. The fluorescent intensity of Alexandrium tamarense, Alexandrium mimutum, Prorocentrum donghaiense and Prorocentrum micans can reduce at anaphase of decadency phase because of the degradation of bacteria and light. The same genus of algae can produce similar FDOM, for example: Alexandrium tamarense, and Alexandrinum mimutum, Prorocentrum donghaiense and Prorocentrum micans, but the positions of the fluorescence peaks are different.
Ren
Bao-Wei
BW
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China. renbaowei@ms.qdio.ac.cn
Zhao
Wei-Hong
WH
Wang
Jiang-Tao
JT
Wang
Lu
L
D002452:Cell Count; D056890:Eukaryota / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism; D006812:Humic Substances; D009930:Organic Chemicals / Q000737:chemistry*; D011506:Proteins / Q000378:metabolism; D013050:Spectrometry, Fluorescence / Q000379:methods*
D006812:Humic Substances; D009930:Organic Chemicals; D011506:Proteins