A - Papers appearing in refereed journals
Menard, G. N., Bryant, F. M., Kelly, A. A., Craddock, C. P., Lavagi, I., Hassani-Pak, K., Kurup, S. and Eastmond, P. J. 2018. Natural variation in acyl editing is a determinant of seed storage oil composition. Scientific Reports. 8, p. 17346. https://doi.org/10.1038/s41598-018-35136-6
Authors | Menard, G. N., Bryant, F. M., Kelly, A. A., Craddock, C. P., Lavagi, I., Hassani-Pak, K., Kurup, S. and Eastmond, P. J. |
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Abstract | Seeds exhibit wide variation in the fatty acid composition of their storage oil. However, the genetic basis of this variation is only partially understood. Here we have used a multi-parent advanced generation inter-cross (MAGIC) population to study the genetic control of fatty acid chain length in Arabidopsis thaliana seed oil. We mapped four quantitative trait loci (QTL) for the quantity of the major very long chain fatty acid species 11-eicosenoic acid (20:1), using multiple QTL modelling. Surprisingly, the main-effect QTL does not coincide with FATTY ACID ELONGASE1 and a parallel genome wide association study suggested that LYSOPHOSPHATIDYLCHOLINE ACYLTRANSFERASE2 (LPCAT2) is a candidate for this QTL. Regression analysis also suggested that LPCAT2 expression and 20:1 content in seeds of the 19 MAGIC founder accessions are related. LPCAT is a key component of the Lands cycle; an acyl-editing pathway that enables acyl-exchange between the acyl-Coenzyme A and phosphatidylcholine precursor pools used for microsomal fatty acid elongation and desaturation, respectively. We Mendelianised the main-effect QTL using biparental chromosome segment substitution lines and carried out complementation tests to show that a single cis-acting polymorphism in the LPCAT2 promoter causes the variation in seed 20:1 content, by altering the LPCAT2 expression level and total LPCAT activity in developing siliques. Our work establishes that oilseed species exhibit natural variation in the enzymic capacity for acyl-editing and this contributes to the genetic control of storage oil composition. |
Year of Publication | 2018 |
Journal | Scientific Reports |
Journal citation | 8, p. 17346 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41598-018-35136-6 |
PubMed ID | 30478395 |
PubMed Central ID | PMC6255774 |
Open access | Published as ‘gold’ (paid) open access |
Funder | BBSRC Industrial Strategy Challenge |
Biotechnology and Biological Sciences Research Council | |
Funder project or code | Tailoring Plant Metabolism ISP |
Understanding the role of lipases in controlling seed storage oil composition | |
Tailoring Plant Metabolism (TPM) - Work package 1 (WP1) - High value lipids for health and industry | |
Publisher's version | Copyright license CC BY |
Accepted author manuscript | Copyright license CC BY |
Supplemental file | Copyright license CC BY |
Output status | Published |
Publication dates | |
Online | 26 Nov 2018 |
Publication process dates | |
Accepted | 26 Oct 2018 |
Publisher | Nature Publishing Group |
ISSN | 2045-2322 |
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