Interactions between irradiance and nutrient availability during astaxanthin accumulation and degradation in Haematococcus pluvialis

Applied Microbiology and Biotechnology
J FábregasA Otero

Abstract

Fully synchronised germination of Haematococcus pluvialis astaxanthin-replete aplanospores was induced by transfer to nitrogen-sufficient conditions under either high or low light intensities, and growth, pigment content and nitrogen consumption were monitored during the cell cycle. No germination of the aplanospores was achieved in the absence of nitrate, even when cells were transferred at low light intensities. On the other hand, cell density and chlorophyll concentration increased dramatically and astaxanthin concentration decreased in N-sufficient cultures due to the germination of 100% of the aplanospores, as demonstrated by flow cytometry. No significant effect of light intensity was observed on the degradation of astaxanthin during germination. In germinated cultures, nitrogen was depleted more rapidly under high light conditions, which resulted in earlier entry into the aplanospore stage and accumulation of astaxanthin. Germination of aplanospores accompanied by astaxanthin degradation could also be obtained in the dark in nutrient-sufficient conditions although at a much lower efficiency. The results demonstrate that nutrient availability is the main factor controlling the transition between red and green stages of H....Continue Reading

References

Jun 16, 2000·Applied Microbiology and Biotechnology·J FábregasA Otero
Jul 27, 2001·Journal of Biotechnology·J FábregasA Domínguez
Jul 1, 1954·The Biochemical Journal·T W GOODWIN, M JAMIKORN
Jan 1, 1955·Archiv für Mikrobiologie·M R DROOP

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Citations

Jul 7, 2011·Marine Drugs·Ana Catarina GuedesFrancisco Xavier Malcata
Feb 6, 2007·Applied Microbiology and Biotechnology·José A Del CampoMiguel G Guerrero
Nov 1, 2007·Biotechnology Letters·Chang Duk Kang, Sang Jun Sim
Sep 13, 2011·Bioprocess and Biosystems Engineering·Jae Jun YooSang Jun Sim
Feb 24, 2007·Applied Microbiology and Biotechnology·Raman VidhyavathiGokare Aswathanarayana Ravishankar
Feb 11, 2016·Applied Microbiology and Biotechnology·Tianqi XiYoon-E Choi
Apr 1, 2011·Biotechnology Progress·A Catarina GuedesF Xavier Malcata

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