INVESTIGADORES
PIERANTOZZI pierluigi
artículos
Título:
Oil biogenesis and antioxidant compounds from "Arauco" olive (Olea europaea L.) cultivar during fruit development and ripening
Autor/es:
ROMINA BODOIRA; MARIELA TORRES; PIERLUIGI PIERANTOZZI; AGNESE TATICCHI; MAURIZIO SERVILI; DAMIÁN MAESTRI
Revista:
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Lugar: Weinheim; Año: 2015 vol. 117 p. 377 - 388
ISSN:
1438-7697
Resumen:
"Arauco" is the only olive (Olea europaea L.) cultivar recognized from
Argentina in the World Catalogue of Olive Varieties. Drupes from this
cultivar were handpicked at different stages of fruit development and
ripening-referred to as days after full flowering (DAFF)-and analyzed to
assess the oil accumulation pattern, and the dynamic of the changes in
fatty acid, tocopherol, squalene, and phenolic compositions. The most
intense oil accumulation period occurred approximately between 80 DAFF
(pit hardening) and 150 DAFF (beginning of fruit maturation). Oleic acid
content increased rapidly until reaching the maximum concentration
(71.4%) approximately 80 DAFF, thus indicating that the most active
biosynthesis period occurred at early fruit growth stages. Later, oleic
acid content decreased gradually, almost linearly, to 62% at the final
sampling point (215 DAFF). The dynamic of tocopherol accumulation showed
a trend characterized by high amounts of the α- and γ-isoforms in very
young drupes, a pronounced decrease during fruit development, and little
or no change during the fruit maturation period. The developing drupes
were found to accumulate significant amounts of squalene (up to 12
500mg/kg of dry weight at 96 DAFF), but squalene dropped strongly after
the beginning of fruit ripening. Whatever the stage of fruit
development, secoiridoids were the major phenolic components. On the
basis of the evolution of the analytical parameters studied, the best
stage for processing "Arauco" fruits for oil production seems to be that
where maturity index is higher than 1 and lower than 2. Practical
applications: The study focuses on biochemical aspects of oil biogenesis
and minor antioxidant compounds from the cv. "Arauco" during fruit
ontogeny. The results show that this cultivar has profitable
characteristics for commercial production of VOO. From a practical
standpoint, results also contribute to better assessment of harvest
time. Findings remark on the convenience of harvesting early (at a low
fruit maturity index) to get the best combination of oil quantity and
quality.