Phosphorus limitation and starvation effects on cell growth and lipid accumulation in Isochrysis galbana U4 for biodiesel production
Abstract
The effect of varying levels of phosphorus (P) on Isochrysis galbana U4 growth, pigmentation and lipid accumulation were investigated. A reduction in the P content to 25% of the recommended level for f/2 medium did not lead to declines in cell growth rates or lipid accumulation levels relative to the cultures maintained on medium supplemented with the normal P dose. Evidence suggesting that the recommended P supply in f/2 exceeds the requirements for maximal algal growth has obvious economic implications for the mass production of I. galbana for biodiesel production. When P supply was in excess this species was also found to accumulate intracellular levels of P that exceeded by up to 6 times its P requirements for growth and cell division. The reduction in P concentration to levels below 25% resulted in P starvation stimulated chlorophyll reductions and carotenoid and lipid accumulation in this species.
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The optimal concentration of phosphorus in the culture medium has been reported to be in the range of 0.001 g L−1 to 0.179 g L−1.
“The optimal concentration of phosphorus in the culture medium has been reported to be in the range of 0.001 g L− 1 to 0.179 g L− 1 [46, 69].”
From Nitrogen and phosphorus stress as a tool to induce lipid production in microalgae (2023) · cites this paper as [69]
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References 18 · Cited by 104
- Authors
- Roopnarain, A., Gray, V. M., & Sym, S. D.
- Affiliations
- University of the Witwatersrand (ZA)
- Corresponding author
- Roopnarain, A.
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2014-03
- Volume
- 156
- Pages
- 408-411
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2039148155
- Cited by
- 104
- References
- 18
- Citations by year
- 2026: 7 · 2025: 11 · 2024: 13 · 2023: 13 · 2022: 8 · 2021: 11 · 2020: 12 · 2019: 7 · 2018: 3 · 2017: 9 · 2016: 3 · 2015: 2 · 2014: 5
- FWCI
- 2.09
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- South African National Energy Research Institute (SANERI)
- National Research Foundation (NRF)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Aquaculture Nutrition and Growth
- Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
- Keywords
- phosphorus limitation, phosphorus deficiency, Isochrysis galbana, microalgae, lipid accumulation, cell growth, chlorophyll, carotenoids, biodiesel feedstock, intracellular phosphorus
- MeSH terms
- Nitrates, Phosphorus, Pigmentation, Lipid Metabolism, Biofuels, Haptophyta
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