Abstract

An ultraperformance liquid chromatography system was used to establish the presence of seven aromatic carboxylic acids, known as antimicrobial substances, in root exudates of barley colonized by the phytopathogenic fungus Fusarium culmorum and the antagonistic bacterium Pseudomonas fluorescens. It was established that barley produced fewer antimicrobial components in exudates in response to the colonization of P. fluorescens than after colonization by F. culmorum. All aromatic carboxylic acids inhibited the growth of F. culmorum, but only two of them inhibited the growth of P. fluorescens and only at the highest concentration. The obtained data demonstrate the ability of the plant to create favorable conditions for the development of beneficial rhizobacteria and to create unfavorable conditions for the growth of the phytopathogenic fungus via the composition of root exudates. In the future, it will be possible to select varieties of grain crops with a specific composition of antimicrobial components in root exudates.

中文翻译：

---

大麦根系分泌物中的芳香羧酸及其对镰刀菌和荧光假单胞菌生长的影响

摘要

一种超高效液相色谱系统用于在植物病原性真菌镰刀菌和拮抗细菌荧光假单胞菌定植的大麦根系分泌物中建立七种芳香族羧酸（称为抗菌物质）的存在。已经确定，大麦对荧光假单胞菌的定殖反应所产生的渗出物中的抗微生物成分比被角果镰孢菌定殖后的大。所有的芳香族羧酸都抑制了F. culmorum的生长，但只有两种抑制了P. fluorescens的生长。并且仅在最高浓度下。所获得的数据证明了植物通过根系分泌物的组成为有益的根瘤菌的生长创造有利条件并为植物致病性真菌的生长创造不利条件的能力。将来，有可能在根系分泌物中选择具有特定抗菌成分的谷物作物品种。