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Effect of phenolic acid content on acceptance of hazel cultivars by filbert aphid

机译：酚酸含量对榛子蚜虫对榛树品种的接受度的影响

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The allelopatic effect of phenolic acids contents in the leaves of six cultivars of hazel (Corylus L.) on the choice of plants by Myzocallis coryli Goetze (?lbert aphid), one of the most important pest of hazel in Poland and throughout the world, was identified. The cvs White Filbert, Mogulnus, and Luizen Zellernus were more resistant to the feeding of aphids in all the years than cvs Minnas, Barra, and Halls Giant. The highest content of total phenolic acids was reported in the leaves of cvs White Filbert and Luizen Zellernuss, with a low level of acceptance by aphids. These cultivars demonstrated a high concentration of gallic acid and caffeic acid. In the leaves of cvs Minnas and Halls Giant, much infested by aphids, the total content of phenolic acids was significantly lower. Moreover, gallic and caffeic acids occurred at significantly lower concentrations. The chromatographic analysis of hazel leaf extracts revealed the presence of eight phenolic acids: gallic, protocatechuic, p-hydroxybenzoic, salicylic, chlorogenic, ferrulic, caffeic, and α-resorcinolic. The leaves of the tested cultivars, irrespective of the level of resistance to filbert aphid, showed a definitely higher concentration of acids, derivatives of trans-cinnamic acid, if compared to the amount of acids – derivatives of benzoic acid.
机译：六个榛树品种（Corylus L.）的叶片中酚酸含量对Myzocallis coryli Goetze（？lbert蚜虫）是波兰和全世界最重要的榛树害虫之一的植物选择的影响，被确定。与Minnas，Barra和Halls Giant相比，White Filbert，Mogulnus和Luizen Zellernus多年来对蚜虫的摄食更具抵抗力。据报道，白vilbert和Luizen Zellernuss的叶片中总酚酸含量最高，而蚜虫的接受程度较低。这些品种显示出高浓度的没食子酸和咖啡酸。在被蚜虫大量侵染的Cvs Minnas和Halls Giant的叶子中，酚酸的总含量显着降低。此外，没食子酸和咖啡酸的浓度要低得多。榛叶提取物的色谱分析表明，存在八种酚酸：没食子酸，原儿茶酸，对羟基苯甲酸，水杨酸，绿原酸，阿魏酸，咖啡酸和α-间苯二酚。不论对欧洲榛树蚜虫的抗性水平如何，被测品种的叶片均显示出一定浓度的酸（反式肉桂酸衍生物），其绝对含量要高于酸（苯甲酸衍生物）的含量。

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