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Title: Increased expression of fatty acid and ABC transporters enhances seed oil production in camelina

Journal Article · · Biotechnology for Biofuels

Abstract Background Lipid transporters play an essential role in lipid delivery and distribution, but their influence on seed oil production in oilseed crops is not well studied. Results Here, we examined the effect of two lipid transporters, FAX1 ( fatty acid export1 ) and ABCA9 ( ATP-binding cassette transporter subfamily A9 ) on oil production and lipid metabolism in the oilseed plant Camelina sativa . Overexpression (OE) of FAX1 and ABCA9 increased seed weight and size, with FAX1 -OEs and ABCA9 -OEs increasing seed length and width, respectively, whereas FAX1 / ABCA9 -OEs increasing both. FAX1- OE and ABCA9- OE displayed additive effects on seed oil content and seed yield. Also, OE of FAX1 and ABCA9 affected membrane lipid composition in developing pods, especially on phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol. The expression of some genes involved in seed oil synthesis, such as DGAT2 , PDAT1 , and LEC1 , was increased in developing seeds of FAX1 - and/or ABCA9 -OEs. Conclusion These results indicate that increased expression of FAX1 and ABCA9 can potentially be applied to improving camelina oil production.

Research Organization:
Donald Danforth Plant Science Center, St. Louis, MO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; Office of China Postdoctoral Council
Grant/Contract Number:
AR0000202; 31801029; 2016YFD0100506; 2017YFE0104800; 20160034
OSTI ID:
1768103
Alternate ID(s):
OSTI ID: 1848177
Journal Information:
Biotechnology for Biofuels, Journal Name: Biotechnology for Biofuels Vol. 14 Journal Issue: 1; ISSN 1754-6834
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
Netherlands
Language:
English

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