Silicate deficiency and lipid synthesis of marine diatoms. [Chaetoceros gracilis; Hantzschia sp. ; Cyclotella sp]

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · J. Phycol.; (United States)

DOI:https://doi.org/10.1111/j.1529-8817.1987.tb04133.x· OSTI ID:6065970

Taguchi, S; Hirata, J A; Laws, E A

Lipid synthesis of three marine diatoms was studied with a /sup 14/CO/sub 2/ incorporation technique in silicate limited batch cultures. Growth rates were independent of the silicate concentration but the cellular yields were proportional to the initial amount of silicate. At the beginning of the stationary growth phase, lipid synthesis rates per unit culture volume increased by 1.7 times for Chaetoceros gracilis, 3.1 times for Hantzschia sp., and 2.8 times for Cyclotella sp., respectively compared to those during the exponential growth phase. Lipid carbon accounted for as much as 57% of the carbon in C. gracilis, 71% in Hantzschia sp., and 65% in Cyclotella sp., respectively. Additional enrichment with silicate during stationary growth phase allowed the cultures to grow further. Lipid synthesis rates were reduced during the subsequent growth phase, and the growth rates themselves were dependent on the level of biomass achieved during the previous stationary phase. However, the cellular yields were similar and probably controlled by light.

• Research Organization: Univ. of Hawaii at Manoa, Honolulu
• OSTI ID: 6065970
• Journal Information: J. Phycol.; (United States), Journal Name: J. Phycol.; (United States) Vol. 23:2; ISSN JPYLA
• Country of Publication: United States
• Language: English

Related Subjects

551001* -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ALGAE
BIOLOGICAL EFFECTS
BIOLOGICAL STRESS
BIOMASS
BIOSYNTHESIS
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DIATOMS
ENERGY SOURCES
GROWTH
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LIPIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANT GROWTH
PLANTS
RENEWABLE ENERGY SOURCES
SILICATES
SILICON COMPOUNDS
SYNTHESIS
TRACER TECHNIQUES