Effects of plant essential oils on growth and virulence factors of Erwinia amylovora
Effects of plant essential oils on growth and virulence factors of Erwinia amylovora
复制标题
DOI：
10.1007/s42161-019-00446-9
复制
发表时间：
2019-12-02
影响因子：
2.2
通讯作者：
Taheri, Parissa
中科院分区：
文献类型：
--
作者：
Akhlaghi, Mahdi;Tarighi, Saeed;Taheri, Parissa
梨火疫病菌（Erwinia amylovora）是蔷薇科重要经济植物的火疫病菌。在这项研究中，11个精油筛选其抗菌活性和能力，影响生长和毒力因子的E。例如，在非致死浓度下的食淀粉菌的产生、生物膜形成和运动性。小茴香和茴芹挥发油具有较强的抑菌活性，沙蒿和独活挥发油具有中等的抑菌活性。其他7种植物的油对大肠杆菌的生长没有明显的抑制作用，但能减少毒力因子的产生。非致死浓度的食淀粉菌。确定抑菌和杀菌浓度使我们能够收集有关抗菌特性的精确数据。结果表明，在非致死浓度下，某些精油可降低大肠杆菌毒力因子的作用。食淀粉的。当细菌被H. persicum、茴香腐霉（P. anisum）、C. arabica，J. aurantifolia和V. agnus-castus。具有低抗菌活性的油在非致死浓度下对运动性的影响不显著。一般来说，芹菜籽和姜黄精油对大肠杆菌毒力因子的降低效果最好。食淀粉的。结果表明，两种精油分别使大肠杆菌的病情进展速度减慢41.71%和30.17%。对梨幼果的抗病效果分别为26.9%和16.7%。这项研究表明，精油可以单独作为环境安全的化合物用于控制火疫病。
Erwinia amylovora causes fire blight in plants of economic importance in Rosaceae family. In this study, 11 essential oils were screened for their antibacterial activities and capabilities to influence the growth and virulence factors by the E. amylovora, such as amylovoran production, biofilm formation, and motility at non-lethal concentrations. Essential oils from Foeniculum vulgare and Pimpinella anisum showed strong antibacterial activity, those of Artemisia aucheri and Heracleum persicum had a moderate antibacterial activity. Oils of seven other plant species did not show substantial growth inhibition but could reduce the production of virulence factors in E. amylovora at non-lethal concentrations. Determining bacteriostatic and bactericidal concentrations enabled us to gather precise data about the antibacterial characteristics. The results suggested that at non-lethal concentrations, some essential oils reduced the effect of virulence factors of E. amylovora. An inverse correlation was found between amylovoran and biofilm production when the bacterium was treated with oils of H. persicum, P. anisum, C. arabica, J. horizentalis, C. aurantifolia and V. agnus-castus. The oils with low antibacterial activity had an insignificant effect on motility at non-lethal concentrations. Generally, Apium graveolens (celery seed) and Curcuma longa (turmeric) essential oils showed the optimum reduction in the effects of virulence factors of E. amylovora. These oils led to 41.71% and 30.17% reduction in the disease progression of E. amylovora on immature pear fruit, respectively and reduced disease progression in the shoot of pear seedlings with 26.9% and 16.7%. This study indicated that essential oils individually may be applied as environmentally safe compounds for controlling the fire blight disease.