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

Sammanfattning

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.

Nyckelord

avena sativa; embryo; endosperm; grain development; oat lipids; oil body

Publicerad i

Journal of Experimental Botany
2007, volym: 58, nummer: 10, sidor: 2463-2470
Utgivare: OXFORD UNIV PRESS

SLU författare

• Marttila, Salla

  • Institutionen för växtskyddsbiologi, Sveriges lantbruksuniversitet
    

• Grimberg, Åsa

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    

• Carlsson, Anders

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    

• Stymne, Sten

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    

• Gummeson, Per Olof

• Heneen, Waheeb

  • Institutionen för växtvetenskap, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Jordbruksvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1093/jxb/erm125

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/17424