Journal article
Halo-adapted microalgae for fucoxanthin production: Effect of incremental increase in salinity
Algal Research, Vol.28, pp.66-73
2017
Abstract
In order to commercially exploit microalgae for the production of fucoxanthin, species must remain productive in the increasingly saline environment typical in outdoor cultivation ponds. To this end, this study investigated the salinity range, growth, fucoxanthin content and productivity of two halotolerant and four marine microalgae under salinity increase condition. The semi-continuous cultivation followed by gradual salinity increase and slow adaptation helped saline microalgae to extend the salinity range up to 55%. Tested species showed about 12% to 90% more fucoxanthin content at their optimal salinity compared to when grown at non-optimal salinities. Fucoxanthin productivity was found directly linked to biomass productivity. Marine microalgae performed best at salinities < 55‰ (ppt, parts per thousand) and halotolerant microalgae was best at salinities > 55‰. Among marine species, the highest fucoxanthin content and productivity was observed in Chaetoceros muelleri which was 2.92 mg g− 1 and 0.072 mg L− 1 d− 1 of ash free dry weight (AFDW), respectively, at 45‰ and fucoxanthin content was relatively consistent over the range of salinity between 35 and 55‰. Between two halotolerants, Amphora sp. showed the highest content and productivity of fucoxanthin which was 1.2 mg g− 1 and 0.053 mg L− 1 d− 1 of AFDW, respectively at 85‰ salinity. The results indicate that it is most likely possible to achieve continuous production of fucoxanthin by cultivating marine and halotolerant species one after another when salinity rises due to evaporation. Details of fucoxanthin content and productivity for Chrysotila carterae, Chaetoceros muelleri, Amphora sp. and Navicula sp. are reported for the first time.
Details
- Title
- Halo-adapted microalgae for fucoxanthin production: Effect of incremental increase in salinity
- Authors/Creators
- T. Ishika (Author/Creator) - Murdoch UniversityN.R. Moheimani (Author/Creator) - Murdoch UniversityP.A. Bahri (Author/Creator) - Murdoch UniversityD.W. Laird (Author/Creator) - Murdoch UniversityS. Blair (Author/Creator) - Murdoch UniversityD. Parlevliet (Author/Creator) - Murdoch University
- Publication Details
- Algal Research, Vol.28, pp.66-73
- Publisher
- Elsevier BV
- Identifiers
- 991005540344707891
- Copyright
- © 2017 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology; School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.171 Photoproductivity
- 3.171.477 Microalgae Biotechnology
- Web Of Science research areas
- Biotechnology & Applied Microbiology
- ESI research areas
- Biology & Biochemistry