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JXB Advance Access originally published online on June 22, 2007
Journal of Experimental Botany 2007 58(10):2463-2470; doi:10.1093/jxb/erm125
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© 2007 The Author(s).
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)

RESEARCH PAPER

Lipids in grain tissues of oat (Avena sativa): differences in content, time of deposition, and fatty acid composition

Antoni Banas1 *, Henryk Debski2 *, Walentyna Banas2, Waheeb K. Heneen3, Anders Dahlqvist3, Maureen Bafor3, Per-Olov Gummeson3, Salla Marttila3, Åsa Ekman3,{dagger}, Anders S. Carlsson3 and Sten Stymne3

1Institute of Biology and Environmental Protection, AP, ul. Arciszewskiego 22, 76-200 Slupsk, Poland
2Institute of Biology, University of Podlasie, 08-110 Siedlce, Poland
3Department of Crop Science, Swedish University of Agricultural Sciences, Box 44, SE-230 53 Alnarp, Sweden

{dagger} To whom correspondence should be addressed. E-mail: Asa.Ekman{at}ltj.slu.se

Oat (Avena sativa) is unusual in comparison with other cereals since there are varieties with up to 18% oil content. The lipid content and fatty acid composition in different parts of the grain during seed development were characterized in cultivars Freja (6% oil) and Matilda (10% oil), using thin-layer and gas chromatography, and light and electron microscopy. The majority of lipids (86–90%) were found in the endosperm. Ninety-five per cent of the higher oil content of cv. Matilda compared with cv. Freja was due to increased oil content of the endosperm. Up to 84% of the lipids were deposited during the first half of seed development, when seeds where still green with a milky endosperm. Microscopy studies revealed that whereas oil bodies of the embryo and scutellum still contained a discrete shape upon grain maturation, oil bodies of the endosperms fused upon maturation and formed smears of oil.

Key words: Avena sativa, embryo, endosperm, grain development, oat lipids, oil body

* These authors contributed equally to this work.

Received 15 December 2006; Revised 25 April 2007 Accepted 10 May 2007


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