Skip to main content
Article
Understanding precision nitrogen stress to optimize the growth and lipid content tradeoff in oleaginous green microalgae
Bioresource Technology
  • Curtis Adams
  • Valerie Godfrey
  • Bruce Bugbee, Utah State University
  • Brad Wahlen
  • Lance Seefeldt, Utah State University
Document Type
Article
Publisher
Elsevier
Publication Date
1-1-2013
DOI
10.1016/j.biortech.2012.12.143
Abstract
Nitrogen deficiency promotes lipid formation in many microalgae, but also limits growth and lipid productivity. In spite of numerous studies, there is poor understanding of the interactions of growth and lipid content, the time course of lipid accumulation and the magnitude of nitrogen deficiency required to stimulate lipid formation. These relationships were investigated in six species of oleaginous green algae, comparing high and low levels of deficiency. Nitrogen stress typically had disproportionate effects on growth and lipid content, with profound differences among species. Optimally balancing the tradeoffs required a wide range in nitrogen supply rate among species. Some species grew first and then accumulated lipids, while other species grew and accumulated lipids concurrently which resulted in increased lipid productivity. Accumulation of high lipid content generally resulted from a response to minimal stress. The data highlight the tremendous biodiversity that may be exploited to optimally produce lipids with precision nitrogen stress.
Comments

This is the author's manuscript. Copyright for the published version of this work belongs to Elsevier. Please visit http://www.sciencedirect.com/science/article/pii/S0960852412020019 to access the published version of this work.

Publisher may require a subscription to access this version.

Citation Information
Curtis Adams, Valerie Godfrey, Brad Wahlen, Lance Seefeldt, Bruce Bugbee, Understanding precision nitrogen stress to optimize the growth and lipid content tradeoff in oleaginous green microalgae. Bioresource Technology, Volume 131, March 2013, Pages 188–194. http://dx.doi.org/10.1016/j.biortech.2012.12.143