Journal
PLANT CELL AND ENVIRONMENT
Volume 29, Issue 12, Pages 2198-2204Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1365-3040.2006.01593.x
Keywords
carbohydrate; carbon partitioning; cell stoichiometry; darkness; FT-IR spectroscopy; homeostasis; lipid; Phormidium; protein
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The chemical composition of organisms in relation to their environmental resource availability is an area of intense research activity. We studied the changes in cell composition of the cyanobacterium Phormidium autumnale in response to prolonged darkness. Cells allocated their internal resources in a homeostatic manner, oxidizing all the three major cellular constituents in a proportional way. This resulted in constant C/N and carbohydrates, lipids and proteins ratios that remained unaltered throughout the whole incubation period. We propose the maintenance of balanced cell composition (homeostasis) as an evolutionary strategy related to environmental transitory changes.
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