INVESTIGADORES
RUBILAR PANASIUK Cynthia Tamara
artículos
Título:
Lipid and fatty acid profiles of gametes and spawned gonads of Arbacia dufresnii (Echinodermata: Echinoidea): sexual differences in the lipids of nutritive phagocytes
Autor/es:
DÍAZ DE VIVAR, MARIA ENRIQUETA; ZARATE, ERICA; RUBILAR, TAMARA; EPHERRA, LUCÍA; AVARO, MARISA; SEWELL, MARY
Revista:
MARINE BIOLOGY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2019
ISSN:
0025-3162
Resumen:
Sea urchin gonads contain nutritive phagocytes (NP) that store nutrients such asprotein, lipid and carbohydrates for use during the production of gametes. While thereis some information on the role of protein, particularly major yolk protein (MYP), duringgametogenesis, very little is known about the role of lipids and their component fattyacids. We compared the lipid and FA profile of mature Arbacia dufresni gonads(intact), with gonads that had been induced to spawn (spawned) and their associatedgametes. The total lipid concentration decreased in females from the intact to thespawned gonads, and with a minimum in the eggs, whilst in males intact and spawnedgonads had similar lipid concentrations, with significantly lower lipid concentration onlyin the sperm. Sex was the main factor affecting FA profile in the gonads (intact,spawned) and gametes of A. dufresnii, with differences in both the variety of FA, theirtotal concentration and proportion. Interestingly, sexual differences in FA profile of thegonads are due not only to the presence of mature gametes, but also due to the NPand gametes remaining after spawning. As male and female sea urchins have thesame basic gonad wall and NP structure, and the same echinoferrin based system fordeposition of the MYP in the NP, our study reveals an unexplored biochemicalcomplexity in the lipids and fatty acids of the NP within sea urchin gonads that hasimplications for future research