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DIMETHYLSULFONIOPROPIONATE PRODUCTION BY PSYCHROPHILIC DIATOM ISOLATES 1
Author(s) -
Kasamatsu Nobue,
Hirano Tomoaki,
Kudoh Sakae,
Odate Tsuneo,
Fukuchi Mitsuo
Publication year - 2004
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.2004.03122.x
Subject(s) - dimethylsulfoniopropionate , psychrophile , diatom , navicula , nitzschia , chaetoceros , biology , botany , algae , bloom , phytoplankton , food science , biochemistry , ecology , nutrient , enzyme
Dimethylsulfoniopropionate (DMSP) production by psychrophilic diatom strains, Chaetoceros sp., Navicula sp., and Nitzschia sp., were experimentally analyzed. All strains showed rapid growth (0.3–0.5 d −1 ) under cold culture conditions (1.7°C). DMSP concentrations (both as particulate, DMSP p , and dissolved, DMSP d ) were negligible in cultures of Chaetoceros sp., whereas those for Navicula sp. and Nitzschia sp. increased toward the end of the 56‐day experiments. The ratio of DMSP p :chl a of the latter two species was approximately 5 in the early exponential growth phase and decreased slightly toward the early stationary phase. During the stationary phase, when chl a and fluorescence remained constant, the ratios in both species increased linearly by up to approximately 6.5 times the value at the start of the stationary phase. This growth‐related DMSP production by diatoms may result in the low concentrations of DMSP p observed in the early stage of diatom blooms under natural conditions.