alexa Vernonia DGATs can complement the disrupted oil and protein metabolism in epoxygenase-expressing soybean seeds.
Agri and Aquaculture

Agri and Aquaculture

Advances in Crop Science and Technology

Author(s): Li R, Yu K, Wu Y, Tateno M, Hatanaka T, , Li R, Yu K, Wu Y, Tateno M, Hatanaka T,

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Abstract Plant oils can be useful chemical feedstocks such as a source of epoxy fatty acids. High seed-specific expression of a Stokesia laevis epoxygenase (SlEPX) in soybeans only results in 3-7\% epoxide levels. SlEPX-transgenic soybean seeds also exhibited other phenotypic alterations, such as altered seed fatty acid profiles, reduced oil accumulation, and variable protein levels. SlEPX-transgenic seeds showed a 2-5\% reduction in total oil content and protein levels of 30.9-51.4\%. To address these pleiotrophic effects of SlEPX expression on other traits, transgenic soybeans were developed to co-express SlEPX and DGAT (diacylglycerol acyltransferase) genes (VgDGAT1 & 2) isolated from Vernonia galamensis, a high accumulator of epoxy fatty acids. These side effects of SlEPX expression were largely overcome in the DGAT co-expressing soybeans. Total oil and protein contents were restored to the levels in non-transgenic soybeans, indicating that both VgDGAT1 and VgDGAT2 could complement the disrupted phenotypes caused by over-expression of an epoxygenase in soybean seeds. Copyright © 2011 Elsevier Inc. All rights reserved. This article was published in Metab Eng and referenced in Advances in Crop Science and Technology

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