Open AccessAccumulation and utilization of polysaccharide by hot‐spring phototrophs during a light‐dark transition
Author(s) -
Konopka Allan
Publication year - 1992
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1992.tb05792.x
Subject(s) - polysaccharide , phototroph , hot spring , chemistry , mushroom , fraction (chemistry) , spring (device) , carbon fibers , food science , photosynthesis , biochemistry , chromatography , biology , materials science , physics , paleontology , thermodynamics , composite number , composite material
A suspension of cells from the green top layer of the microbial mat in Mushroom Spring, Yellowstone National Park, was pulsed with NaH 14 CO 3 in the light for 2 h and then incubated in the dark. More than 80% of CO 2 fixed in the light was incorporated into polysaccharide. During 4.5 h in the dark, 50% of this polysaccharide was metabolized, and there was a substantial increase in the amount of radioactivity in the protein fraction. Carbon in the polysaccharide fraction was metabolized to protein carbon at an efficiency of 0.47.