Giovanni Caruso1, Riccardo Gucci1,2, Maria Isabella Sifola3, Roberto Selvaggini4, Stefania Urbani4, Sonia Esposto4, Agnese Taticchi4, Maurizio Servili4. 1. Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, Pisa, Italy. 2. Interdepartmental Research Center Nutrafood - Nutraceuticals and Food for Health, University of Pisa, Via del Borghetto 80, Pisa, Italy. 3. Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, Italy. 4. Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, Perugia, Italy.
Abstract
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 K232 , K270 , ΔK 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.
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 K232 , K270 , ΔK 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 oliveoil quality.
Authors: Giovanni Caruso; Pablo J Zarco-Tejada; Victoria González-Dugo; Marco Moriondo; Letizia Tozzini; Giacomo Palai; Giovanni Rallo; Alberto Hornero; Jacopo Primicerio; Riccardo Gucci Journal: PLoS One Date: 2019-01-22 Impact factor: 3.240
Authors: Maria Cristina Barbalace; Lorenzo Zallocco; Daniela Beghelli; Maurizio Ronci; Serena Scortichini; Maria Digiacomo; Marco Macchia; Maria Rosa Mazzoni; Dennis Fiorini; Antonio Lucacchini; Silvana Hrelia; Laura Giusti; Cristina Angeloni Journal: Antioxidants (Basel) Date: 2021-03-10