Betulinic Acid Delays Turnip Mosaic Virus Infection by Activating the Phytosulfokine Signalling Pathway in Nicotiana benthamiana.

IF 4.8 1区 农林科学 Q1 PLANT SCIENCES
Meirong Xiang, Pengyue Wang, Keda Han, Jianjian Liu, Ziting Huang, Chaonan Wang, Xinxin Jing, Jiao Du, Bingjian Sun, Honglian Li, Chao Zhang, Pengbai Li
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Abstract

Plant viral diseases pose a significant threat to agricultural production, and the availability of effective drugs against viral diseases remains limited. In this study, we discovered that betulinic acid (BA), a pentacyclic triterpenoid derived from plants, delays infection by turnip mosaic virus (TuMV) in Nicotiana benthamiana. Transcriptomic analysis revealed that BA treatment specifically induced the expression of N. benthamiana phytosulfokine 3 (NbPSK3), a plant pentapeptide hormone with diverse functions, while TuMV infection suppressed its expression. Further study demonstrated that NbPSK3 positively regulates antiviral defence against TuMV infection. Disruption of PSK signalling by targeting the membrane-bound PSK receptors (PSKRs) promoted viral infection. Additionally, exogenous sulphonated PSK (active form) treatment significantly delayed infection by TuMV in N. benthamiana compared to unmodified PSK peptides (dPSK, inactive form) or control treatments, while silencing the receptor NbPSKR1 abolished the ability of PSK to inhibit TuMV infection. Moreover, the inhibition of TuMV infection by BA is dependent on the PSK-PSKR signalling pathway. Overall, these findings not only underscore the potential of BA as a promising and environmentally friendly agent for modulating plant viral diseases but also emphasise the role of the PSK signalling pathway in promoting at least partial resistance to TuMV, which might have interest for crop breeding.

白桦酸通过激活植物硫代素信号通路延缓萝卜花叶病毒感染。
植物病毒性疾病对农业生产构成重大威胁,而防治病毒性疾病的有效药物仍然有限。在本研究中,我们发现白桦酸(BA)是一种从植物中提取的五环三萜类化合物,可以延缓本烟叶病毒(Nicotiana benthamiana)对芜菁花叶病毒(TuMV)的感染。转录组学分析显示,BA处理特异性诱导了N. benthamiana phytosulfokine 3 (NbPSK3)的表达,NbPSK3是一种具有多种功能的植物五肽激素,而TuMV感染抑制了其表达。进一步的研究表明NbPSK3正调控对TuMV感染的抗病毒防御。通过靶向膜结合PSK受体(PSKRs)破坏PSK信号传导促进病毒感染。此外,与未修饰的PSK肽(dPSK,无活性形式)或对照处理相比,外源性磺化PSK(活性形式)处理显著延迟了benthamiana中TuMV的感染,而沉默受体NbPSKR1则消除了PSK抑制TuMV感染的能力。此外,BA对TuMV感染的抑制依赖于PSK-PSKR信号通路。总的来说,这些发现不仅强调了BA作为一种有前途的环境友好型植物病毒疾病调节剂的潜力,而且还强调了PSK信号通路在促进对TuMV的部分抗性方面的作用,这可能对作物育种有兴趣。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Molecular plant pathology
Molecular plant pathology 生物-植物科学
CiteScore
9.40
自引率
4.10%
发文量
120
审稿时长
6-12 weeks
期刊介绍: Molecular Plant Pathology is now an open access journal. Authors pay an article processing charge to publish in the journal and all articles will be freely available to anyone. BSPP members will be granted a 20% discount on article charges. The Editorial focus and policy of the journal has not be changed and the editorial team will continue to apply the same rigorous standards of peer review and acceptance criteria.
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