Enhanced disease resistance against Botrytis cinerea by strigolactone-mediated immune priming in Arabidopsis thaliana

IF 1.5 4区 农林科学 Q2 ENTOMOLOGY Journal of Pesticide Science Pub Date : 2024-08-09 DOI:10.1584/jpestics.d24-019
Moeka Fujita, Tomoya Tanaka, Miyuki Kusajima, Kengo Inoshima, Futo Narita, Hidemitsu Nakamura, Tadao Asami, Akiko Maruyama-Nakashita, Hideo Nakashita
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Abstract

Strigolactones (SLs) are a class of plant hormones that play several roles in plants, such as suppressing shoot branching and promoting arbuscular mycorrhizal symbiosis. The positive regulation of plant disease resistance by SLs has recently been demonstrated by analyses using SL-related mutants. In Arabidopsis, SL-mediated signaling has been reported to modulate salicylic acid-mediated disease resistance, in which the priming of plant immunity plays an important role. In this study, we analyzed the effect of the synthetic SL analogue rac-GR24 on resistance against necrotrophic pathogen Botrytis cinerea. In rac-GR24-treated plants, disease resistance against B. cinerea was enhanced in an ethylene- and camalexin-dependent manners. Expression of the ethylene-related genes and the camalexin biosynthetic gene and camalexin accumulation after pathogen infection were enhanced by immune priming in rac-GR24-treated plants. These suggest that SL-mediated immune priming is effective for many types of resistance mechanisms in plant self-defense systems.

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拟南芥通过绞股蓝内酯介导的免疫启动增强对灰霉病的抗病性
石蒜内酯(SLs)是一类植物激素,在植物体内发挥多种作用,如抑制嫩枝分枝和促进丛枝菌根共生。最近,通过使用与 SL 相关的突变体进行分析,证明了 SL 对植物抗病性的积极调控作用。据报道,在拟南芥中,SL 介导的信号传导可调节水杨酸介导的抗病性,其中植物免疫的启动起着重要作用。在这项研究中,我们分析了合成的水杨酸类似物 rac-GR24 对坏死性病原菌 Botrytis cinerea 的抗性的影响。在经 rac-GR24 处理的植物中,对 B. cinerea 的抗病性以乙烯和骆驼蓬苷依赖的方式增强。在 rac-GR24 处理的植株中,乙烯相关基因和骆驼蓬苷生物合成基因的表达以及病原体感染后骆驼蓬苷的积累都通过免疫引物得到了增强。这表明,SL 介导的免疫启动对植物自卫系统中的多种抗性机制都是有效的。
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来源期刊
Journal of Pesticide Science
Journal of Pesticide Science 农林科学-昆虫学
CiteScore
4.30
自引率
4.20%
发文量
28
审稿时长
18-36 weeks
期刊介绍: The Journal of Pesticide Science publishes the results of original research regarding the chemistry and biochemistry of pesticides including bio-based materials. It also covers their metabolism, toxicology, environmental fate and formulation.
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