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Ectopic Expression of OLEOSIN 1 and Inactivation of GBSS1 Have a Synergistic Effect on Oil Accumulation in Plant Leaves

Biology Department, Brookhaven National Laboratory, BNL 463, 50 Bell Ave., Upton, NY 11953, USA
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Academic Editor: José Manuel Martínez-Rivas
Plants 2021, 10(3), 513; https://doi.org/10.3390/plants10030513
Received: 16 February 2021 / Revised: 3 March 2021 / Accepted: 6 March 2021 / Published: 9 March 2021
(This article belongs to the Special Issue Plant Lipid Metabolism)
During the transformation of wild-type (WT) Arabidopsis thaliana, a T-DNA containing OLEOSIN-GFP (OLE1-GFP) was inserted by happenstance within the GBSS1 gene, resulting in significant reduction in amylose and increase in leaf oil content in the transgenic line (OG). The synergistic effect on oil accumulation of combining gbss1 with the expression of OLE1-GFP was confirmed by transforming an independent gbss1 mutant (GABI_914G01) with OLE1-GFP. The resulting OLE1-GFP/gbss1 transgenic lines showed higher leaf oil content than the individual OLE1-GFP/WT or single gbss1 mutant lines. Further stacking of the lipogenic factors WRINKLED1, Diacylglycerol O-Acyltransferase (DGAT1), and Cys-OLEOSIN1 (an engineered sesame OLEOSIN1) in OG significantly elevated its oil content in mature leaves to 2.3% of dry weight, which is 15 times higher than that in WT Arabidopsis. Inducible expression of the same lipogenic factors was shown to be an effective strategy for triacylglycerol (TAG) accumulation without incurring growth, development, and yield penalties. View Full-Text
Keywords: triacylglycerol; fatty acids; oleosin; granule bound starch synthase; metabolic engineering triacylglycerol; fatty acids; oleosin; granule bound starch synthase; metabolic engineering
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MDPI and ACS Style

Zhai, Z.; Liu, H.; Shanklin, J. Ectopic Expression of OLEOSIN 1 and Inactivation of GBSS1 Have a Synergistic Effect on Oil Accumulation in Plant Leaves. Plants 2021, 10, 513. https://doi.org/10.3390/plants10030513

AMA Style

Zhai Z, Liu H, Shanklin J. Ectopic Expression of OLEOSIN 1 and Inactivation of GBSS1 Have a Synergistic Effect on Oil Accumulation in Plant Leaves. Plants. 2021; 10(3):513. https://doi.org/10.3390/plants10030513

Chicago/Turabian Style

Zhai, Zhiyang, Hui Liu, and John Shanklin. 2021. "Ectopic Expression of OLEOSIN 1 and Inactivation of GBSS1 Have a Synergistic Effect on Oil Accumulation in Plant Leaves" Plants 10, no. 3: 513. https://doi.org/10.3390/plants10030513

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