Storage lipids and proteins of Euterpe edulis seeds

• Autores: Panza, V.; Pighin, D.; Láinez, V.; Pollero, R.J.; Maldonado, S.
• Año de publicación: 2009
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Biocell 2009;33(2):99-106
• Materia: Arecaceae; Fatty acids; Palm seeds; Recalcitrant behavior; Storage susceptibility; fatty acid; linoleic acid; lipid; oleic acid; palmitic acid; protein; stearic acid; unsaturated fatty acid; Arecaceae; article; axis; behavior; controlled study; cotyledon; dry weight; endosperm; Euterpe edulis seed; fatty acid desaturation; gas liquid chromatography; lipid composition; lipid storage; longevity; molecular weight; nonhuman; plant seed; polyacrylamide gel electrophoresis; protein analysis; protein content; tissue specificity; Arecaceae; Chemical Fractionation; Electrophoresis, Polyacrylamide Gel; Fatty Acids; Fruit; Lipid Metabolism; Plant Proteins; Seeds; Arecaceae; Euterpe edulis
• Institución: Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales

Comparative studies on fatty acid and protein composition of the endosperm and embryo of palmito (Euterpe edulis Martius) were conducted using gas-liquid chromatography and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. On a dry weight basis, the embryo contained extremely lower amounts of lipids and proteins than did the endosperm, which was associated with the scarce lipid and protein bodies previously reported in axis and cotyledon. The fatty acid composition also exhibited differences between both tissues: (I) the fatty acid diversity was greater in embryo than in endosperm; (II) embryo and endosperm contained predominantly linoleic, palmitic, oleic and stearic acids even though the relative values were different for each tissue. As compared to other palm species, the higher fatty acid unsaturation in Euterpe edulis seed could be involved in the previously reported short longevity and recalcitrant behavior during storage. Proteins of both tissues were heterogeneous in molecular mass. Some proteins were tissue-specific, but other were common, among them a highly glycosylated protein which migrated at about 55 kDa. We hypothesize that the latter, also reported in all previously studied palm species, is one of the proteins characterizing the Arecaceae family.
Fil:Láinez, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.