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Irrigation and fruit canopy position modify oil quality of olive trees (cv. Frantoio)
Author(s) -
Caruso Giovanni,
Gucci Riccardo,
Sifola Maria Isabella,
Selvaggini Roberto,
Urbani Stefania,
Esposto Sonia,
Taticchi Agnese,
Servili Maurizio
Publication year - 2017
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8207
Subject(s) - canopy , orchard , irrigation , olive trees , olea , oleic acid , chemistry , horticulture , linoleic acid , tree canopy , deficit irrigation , botany , agronomy , biology , fatty acid , irrigation management , organic chemistry
BACKGROUND Fruit development and oil quality in Olea europaea L. are strongly influenced by both light and water availability. In the present study, the simultaneous effects of light environment and irrigation on fruit characteristics and oil quality were studied in a high‐density orchard over two consecutive years. Olive fruits were harvested from three canopy positions (intercepting approximately 64%, 42% and 30% of above canopy radiation) of fully‐productive trees subjected to full, deficit or complementary irrigation. RESULTS Fruits receiving 61–67% of above canopy radiation showed the highest fruit weight, mesocarp oil content and maturation index, whereas those intercepting only 27–33% showed the lowest values. Palmitoleic and linoleic acids increased in oils obtained from fruits exposed to high light levels, whereas oleic acid and the oleic‐linoleic acid ratio decreased. Neither canopy position, nor irrigation affected K 232 , K 270 , Δ K and the concentration of lignan in virgin olive oils (VOOs). Total phenols, 3,4‐DHPEA‐EDA [2‐(3,4‐hydroxyphenyl)ethyl (3S,4E)‐4‐formyl‐3‐(2‐oxoethyl)hex‐4‐enoate] and p ‐HPEA‐EDA (decarboxymethyl ligstroside‐aglycone) increased in VOOs produced from fruits harvested from the top of the canopy, whereas full irrigation decreased total phenols and 3,4‐DHPEA‐EDA concentrations with respect to the complementary irrigation treatment. CONCLUSION Light and water availability are crucial not only for tree productivity, but also they clearly affect olive oil quality. © 2017 Society of Chemical Industry