Petrie, JR and Shrestha, P and Belide, S and Kennedy, Y and Lester, G and Liu, Q and Divi, UK and Mulder, RJ and Mansour, MP and Nichols, PD and Singh, SP, Metabolic engineering Camelina sativa with fish oil-like levels of DHA, PLoS One, 9, (1) Article e85061. ISSN 1932-6203 (2014) [Refereed Article]
Background: Omega-3 long-chain (≥C20) polyunsaturated fatty acids (ω3 LC-PUFA) such as eicosapentaenoic acid (EPA) and docosapentaenoic acid (DHA) are critical for human health and development. Numerous studies have indicated that deficiencies in these fatty acids can increase the risk or severity of cardiovascular, inflammatory and other diseases or disorders. EPA and DHA are predominantly sourced from marine fish although the primary producers are microalgae. Much work has been done to engineer a sustainable land-based source of EPA and DHA to reduce pressure on fish stocks in meeting future demand, with previous studies describing the production of fish oil-like levels of DHA in the model plant species, Arabidopsis thaliana.
Principal Findings: In this study we describe the production of fish oil-like levels (>12%) of DHA in the oilseed crop species Camelina sativa achieving a high ω3/ω6 ratio. The construct previously transformed in Arabidopsis as well as two modified construct versions designed to increase DHA production were used. DHA was found to be stable to at least the T5 generation and the EPA and DHA were found to be predominantly at the sn-1,3 positions of triacylglycerols. Transgenic and parental lines did not have different germination or seedling establishment rates.
Conclusions: DHA can be produced at fish oil-like levels in industrially-relevant oilseed crop species using multi-gene construct designs which are stable over multiple generations. This study has implications for the future of sustainable EPA and DHA production from land-based sources.
|Item Type:||Refereed Article|
|Keywords:||Camelina sativa, metabolic engineering, fish oil, DHA, omega 3 fatty acids,|
|Research Group:||Agricultural Biotechnology|
|Research Field:||Genetically Modified Field Crops and Pasture|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding Knowledge|
|Objective Field:||Expanding Knowledge in the Biological Sciences|
|Author:||Nichols, PD (Dr Peter Nichols)|
|Web of Science® Times Cited:||36|
|Deposited By:||IMAS - Directorate|
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