在花生死亡病毒上翻倍:针对非结构性 (NSs) 和核体 (NP) 基因的组合dSRNA赋予了优越的耐药性
Suryakant Manik1,2, Dipinte Gupta1, Oinam Washington Singh1,3
1Advanced Centre for Plant Virology, Division of Plant Pathology, ICAR-Indian Agricultural Research Institute, New Delhi, India.
Planta
|September 25, 2025
概括
双链RNA (dsRNA) 向花生死病毒 (GBNV) 基因,有效降低植物中的病毒载量和症状. 这种RNA干扰 (RNAi) 方法提供了一种可持续的,环保的作物防护策略来防止GBNV.
科学领域:
- 植物病理学 植物病理学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 核桃芽亡病毒 (GBNV) 是印度次大陆的一个主要的Orthotospovirus威胁,导致大量的作物损失.
- 缺乏抗GBNV的品种和载体种群中抗昆虫剂耐药性的增加需要新的控制策略.
- RNA干扰 (RNAi) 是植物针对性抗病毒防御的潜在机制.
研究的目的:
- 评估外部应用的双链RNAs (dsRNAs) 针对GBNV非结构性 (NSs) 和核蛋白 (NP) 基因的疗效.
- 评估易感植物物种中RNAi介导的耐药性诱导,Nicotiana benthamiana和Vigna unguiculata (牛).
- 为了确定单一和组合的dSRNA治疗对抗GBNV感染的有效性.
主要方法:
- 两个针对GBNVNS和NP基因的dsRNAs在埃舍里希亚大肠杆菌HT115.5中得到表达.
- dsRNAs被外源地应用于N. benthamiana和牛苗,然后接种GBNV疫苗.
- 分析了疾病的严重程度,病毒转录水平 (qRT-PCR) 和病毒衍生的siRNAs (北方斑).
主要成果:
- 结合的dsRNA治疗显著减少了87%的牛和54%的N. benthamiana. 的GBNV疾病严重程度.
- 病毒转录水平在牛豆中降低了约35倍,在N. benthamiana中降低了38倍.
- 北方斑点分析证实了通过产生病毒衍生的siRNAs来激活RNAi途径.
结论:
- 外源应用的dSRNA针对双重GBNV基因有效诱导RNAi介导的耐药性,减少病毒载量和疾病症状.
- 针对NS和NP基因的dsRNAs的同时应用为在易受影响的作物中管理GBNV提供了一个强有力的和可持续的策略.
- 与N. benthamiana相比,牛显示出更强的GBNV保护,突出了对基于RNAi的作物保护的特定物种反应.
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