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Boron foliar application enhances oleuropein level and modulates volatile compound composition in olive leaves
- Pasković, Igor, Soldo, Barbara, Talhaoui, Nassima, Palčić, Igor, Brkljača, Mia, Koprivnjak, Olivera, Majetić Germek, Valerija, Ban, Dean, Klanjac, Jana, Franić, Mario, Žurga, Paula, Grozić, Kristina, Lukić, Igor, Goreta Ban, Smiljana
- Scientia horticulturae 2019 v.257 pp. 108688
- Olea europaea, boron, disease resistance, farming systems, foliar application, greenhouses, insects, leaves, oleuropein, olives, pathogens, phenols, plantlets, volatile compounds
- The present study investigated the effect of boron (B) foliar application on the dynamic changes in the concentration of phenols, especially oleuropein, and volatile compounds of olive leaves during a 90-day period. The trial was conducted in a greenhouse on one year old olive plantlets, sprayed with B at 41.62 mM against a water treated control. It was revealed that total phenols and oleuropein concentration in old and in young olive leaves increased in B treated leaves 90 days after application. Furthermore, B enhanced the concentration of particular terpene and norisoprenoid volatiles in olive leaf infusion. The obtained results may give a new perspective in biochemical farming practice, with a possibility to increase the amounts of phenols and terpenes in olive leaves intended for medical uses, and to enhance olive plant resistance to pathogens and insects.