Pasković Igor, Lukić Igor, Žurga Paula, Majetić Germek Valerija, Brkljača Mia, Koprivnjak Olivera, Major Nikola, Grozić Kristina, Franić Mario, Ban Dean, Marcelić Šime, Goreta Ban Smiljana
Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440 Poreč, Croatia.
Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 25, 10000 Zagreb, Croatia.
Plants (Basel). 2020 Aug 27;9(9):1099. doi: 10.3390/plants9091099.
In order to investigate the potential of various olive cultivars and leaf sampling times for phytochemical farming practice in Croatia, phenolic and mineral composition was determined in olive leaves of four Croatian cultivars and Italian cultivar Leccino collected at three occasions, in October 2017, January 2018, and March 2018. Istarska bjelica turned out to have the largest phytochemical potential among the investigated cultivars due to steady high oleuropein concentrations found in its leaves. The concentration of main phenolic components in Istarska bjelica leaves changed only slightly during the sampling period, suggesting the possibility of its higher capability for low air temperatures stress resistance and different metabolic response compared to the other studied cultivars. Low air temperatures increased the oleuropein level and antioxidant activity in leaves of Leccino, Oblica, Levantinka, and Drobnica cultivars, which may be of crucial phytochemical farming interest. Each of the investigated olive cultivars was characterized by a specific leaf mineral nutrient composition, which could have had a specific role in their interplay with phenols.
为了探究克罗地亚不同橄榄品种及叶片采样时间在植物化学种植实践中的潜力，对四个克罗地亚品种和意大利品种莱基诺（Leccino）的橄榄叶中的酚类和矿物质成分进行了测定，采样时间为2017年10月、2018年1月和2018年3月这三个时段。由于在伊斯特尔斯卡·贝利察（Istarska bjelica）叶片中发现其橄榄苦苷浓度持续较高，结果表明它在被调查的品种中具有最大的植物化学潜力。在采样期间，伊斯特尔斯卡·贝利察叶片中主要酚类成分的浓度变化很小，这表明与其他研究品种相比，它可能具有更强的耐低温胁迫能力和不同的代谢反应。低温提高了莱基诺、奥布利察（Oblica）、黎凡廷卡（Levantinka）和德罗布尼察（Drobnica）品种叶片中的橄榄苦苷水平和抗氧化活性，这可能对植物化学种植具有至关重要的意义。每个被调查的橄榄品种都具有特定的叶片矿质营养成分，这可能在它们与酚类物质的相互作用中发挥特定作用。
