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Temporal Variation of Phenolic and Mineral Composition in Olive Leaves Is Cultivar Dependent
Open AccessArticle

Determination of the Variability of Biophenols and Mineral Nutrients in Olive Leaves with Respect to Cultivar, Collection Period and Geographical Location for Their Targeted and Well-Timed Exploitation

1
Institute of Agriculture and Tourism, Department of Agriculture and Nutrition, K. Huguesa 8, 52440 Poreč, Croatia
2
Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 25, 10000 Zagreb, Croatia
3
Teaching Institute of Public Health of Primorsko-goranska County, Krešimirova 52a, 51000 Rijeka, Croatia
4
Faculty of Medicine, Department of Food Technology and Control, University of Rijeka, Braće Branchetta 20, 51000 Rijeka, Croatia
5
Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
6
Department of Ecology, Agronomy and Aquaculture, University of Zadar, Mihovila Pavlinovića bb, 23000 Zadar, Croatia
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Plants 2020, 9(12), 1667; https://doi.org/10.3390/plants9121667
Received: 9 November 2020 / Revised: 25 November 2020 / Accepted: 26 November 2020 / Published: 27 November 2020
(This article belongs to the Special Issue Plant Polyphenols—from Plants to Human Health)
The interactive effects of cultivar, collecting period, and geographical location on the content and composition of biophenols and macro and micronutrients in olive (Olea europaea L.) leaf were investigated. Leaves of six cultivars were collected at three periods in two locations in Croatia. The leaves of Istarska bjelica cultivar had the greatest biophenol (oleuropein) potential, especially those sampled in January and in March at the location of Pag. All the cultivars yielded leaves with the highest concentration of biophenols in March, which coincided with the pruning period. Except for high oleuropein concentration in Istarska bjelica, flavonoids were found to be most useful for differentiating olive leaves according to cultivar. Verbascoside turned out to be the most potent differentiator of collecting periods, while phosphorus and zinc turned out to be most useful for differentiating locations. Despite different agroecological conditions at the two locations, cultivar exhibited a significant effect on olive leaf nutrient composition, which was certainly causally related to that of the biophenols. The results obtained showed that it is possible to plan more well-timed and efficient exploitation of biophenols from olive leaf based on the knowledge about the interactive effects of the three studied factors. View Full-Text
Keywords: Croatia; cultivar; geographical location; nutrients; Olea europaea L.; olive leaf; phenols; sampling time Croatia; cultivar; geographical location; nutrients; Olea europaea L.; olive leaf; phenols; sampling time
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MDPI and ACS Style

Lukić, I.; Pasković, I.; Žurga, P.; Majetić Germek, V.; Brkljača, M.; Marcelić, Š.; Ban, D.; Grozić, K.; Lukić, M.; Užila, Z.; Goreta Ban, S. Determination of the Variability of Biophenols and Mineral Nutrients in Olive Leaves with Respect to Cultivar, Collection Period and Geographical Location for Their Targeted and Well-Timed Exploitation. Plants 2020, 9, 1667. https://doi.org/10.3390/plants9121667

AMA Style

Lukić I, Pasković I, Žurga P, Majetić Germek V, Brkljača M, Marcelić Š, Ban D, Grozić K, Lukić M, Užila Z, Goreta Ban S. Determination of the Variability of Biophenols and Mineral Nutrients in Olive Leaves with Respect to Cultivar, Collection Period and Geographical Location for Their Targeted and Well-Timed Exploitation. Plants. 2020; 9(12):1667. https://doi.org/10.3390/plants9121667

Chicago/Turabian Style

Lukić, Igor; Pasković, Igor; Žurga, Paula; Majetić Germek, Valerija; Brkljača, Mia; Marcelić, Šime; Ban, Dean; Grozić, Kristina; Lukić, Marina; Užila, Zoran; Goreta Ban, Smiljana. 2020. "Determination of the Variability of Biophenols and Mineral Nutrients in Olive Leaves with Respect to Cultivar, Collection Period and Geographical Location for Their Targeted and Well-Timed Exploitation" Plants 9, no. 12: 1667. https://doi.org/10.3390/plants9121667

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