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7-Oxo-和7-Hydroxysterols的植物疾病抵抗诱导活动

H Schabdach¹, S Johne², U Steiner³

¹Lehrstuhl für Organische Chemie 1/2, NW II, Universität Bayreuth, D-95440 Bayreuth, Bundesrepublik Deutschland.

Zeitschrift fur Naturforschung. C, Journal of biosciences

|November 18, 2023

概括

某些类固醇,如7-oxosterols和7-hydroxysterols,可以触发植物对大麦和小麦特定真菌病的防御. 这些化合物为作物保护战略提供了一个有希望的途径.

科学领域:

农业科学农业科学
植物病理学植物病理学
有机化学有机化学

背景情况:

由真菌病原体引起的作物疾病对全球粮食安全构成重大威胁.
类固醇是一种有机化合物,具有多种生物作用,包括植物防御机制.

研究的目的:

调查7-oxosterols和7-hydroxysterols的潜力,以诱导大麦和小麦对特定真菌病原体的耐药性.
为了确定哪些固醇衍生物表现出最强的抗性诱导特性.

主要方法:

大麦和小麦初级叶被处理为7-oxosterols和7-hydroxysterols的溶液,其度为10−4mol/l.
随后,在治疗后两天,植物接种了真菌病原体,特别是Puccinia striiformis和Puccinia hordei.
感染部位被量化,以评估诱导耐药性的水平.

主要成果:

7-氧醇和7-基醇表明,它们能够在大麦和小麦中诱导对Puccinia striiformis和Puccinia hordei的耐药性.
β-固醇和胆固醇的7α-和7β-氧化表是最有效的,减少了39-49%的感染部位.
没有观察到对Erysiphe graminis或Cochliobolus sativus的显著耐药性.

结论:

特定的基化固醇可以有效地诱导植物对某些生真菌的防御反应.
这些发现表明,基于固醇的化合物在开发用于作物疾病管理的新策略方面具有潜力.
诱导电阻的特异性凸显了对这些化合物的有针对性的应用的需要.

关键词:

7-Oxo和7-Hydroxysterols是7-Oxo和7-Hydroxysterols的组成部分之一.这种植物叫Hordeum vulgare.诱导的阻力诱导的阻力在 Poaceae 种群中.在Triticum aestivum中,它是最重要的.

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