Abstract The present study evaluates the effects of severe drought stress on the content of phenolic compounds in olive leaves, namely hydroxytyrosol, tyrosol, p-hydroxybenzoic acid, catechin, luteolin 7-O-rutinoside, luteolin 7-O-glucoside, apigenin 7-O-glucoside, quercetin, apigenin, pinoresinol, oleuropein and verbascoside in greenhouse-grown plantlets. The results showed that oleuropein, verbascoside, luteolin 7-O-glucoside and apigenin 7-O-glucoside were the most important phenolic compound of stressed olive plants and can represent up to 84% of the total amount of the identified phenolic compounds. Application of drought stress caused a significant increase in the level of oleuropein (87%), verbascoside (78%), luteolin 7-O-glucoside (72%) and apigenin 7-O-glucoside (85%), when compared to the control. The elevated values of these phenolic compounds can help controlling the water status of olive plants and avoiding serious oxidative damage induced by water deficit stress. To our knowledge, this is the first report to show the boost in the concentrations of verbascoside, luteolin 7-O-glucoside and apigenin 7-O-glucoside in the leaves of olive trees after water deficit stress.

中文翻译：

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干旱胁迫对温室种植的橄榄树（Olea europaea）酚类物质积累的影响

摘要 本研究评估了严重干旱胁迫对橄榄叶酚类化合物含量的影响，即羟基酪醇、酪醇、对羟基苯甲酸、儿茶素、木犀草素 7-O-芸香苷、木犀草素 7-O-葡萄糖苷、芹菜素 7- O-葡萄糖苷、槲皮素、芹菜素、松脂醇、橄榄苦苷和毛蕊花苷在温室种植的植物中。结果表明，橄榄苦苷、毛蕊花苷、木犀草素 7-O-葡萄糖苷和芹菜素 7-O-葡萄糖苷是受胁迫橄榄植物中最重要的酚类化合物，占已鉴定酚类化合物总量的 84%。干旱胁迫的应用导致橄榄苦苷 (87%)、毛蕊花苷 (78%)、木犀草素 7-O-葡萄糖苷 (72%) 和芹菜素 7-O-葡萄糖苷 (85%) 的水平显着增加。控制。这些酚类化合物的升高值有助于控制橄榄植物的水分状况，避免由缺水压力引起的严重氧化损伤。据我们所知，这是第一份显示缺水胁迫后橄榄树叶子中毛蕊花苷、木犀草素 7-O-葡萄糖苷和芹菜素 7-O-葡萄糖苷浓度升高的报告。