Tiffanie Scandolera, Julie Lintz, Ariane Gratias, Ellea Aboud, Simon Rochoux, Maria V Préjean, Gilles Chatel Innocenti, Marie Garmier, Gianluca Teano, Juan C Alvarez-Diaz, Graham Noctor, Valérie Geffroy, Stéphanie Pflieger
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引用次数: 0
摘要
植物病毒造成重大作物损失,由于人类活动推动全球气候变化,这种情况可能会恶化,其中一个因素是大气中二氧化碳浓度的增加。本研究评估了CO2浓度升高(eCO2, 1000 vs 400 ppm)对感染豆荚斑纹病毒(BPMV, Comovirus siiliquae)的两种基因型普通豆(Phaseolus vulgaris L.)一个敏感和一个抗性的影响。对于这两个基因型,我们发现在BPMV接种阶段,在健康植物中富集eCO2并没有增强植物的生长、发育和生理机能。在eCO2作用下,两种基因型的原发感染位点数量均有所减少。与此一致,接种叶片的病毒滴度较低,表明在eCO2下,两种基因型对BPMV的抗性都增强了。为了研究潜在的机制,我们研究了参与不同抗病毒免疫途径的基因的表达:水杨酸(SA)信号传导、RNA沉默和pamp触发免疫(PTI)途径。在我们的实验条件下,在两个基因型中,eCO2既没有启动sa信号通路,也没有启动PTI通路。然而,eCO2似乎在耐药基因型中启动RNA沉默途径,在较小程度上在易感基因型中启动RNA沉默途径。
Effects of Elevated CO2 on Bean Pod Mottle Virus Infection in Both Incompatible and Compatible Interactions With Phaseolus vulgaris L.
Plant viruses cause significant crop losses, a situation that could worsen due to anthropogenic activities driving global climate change, one factor of which is the increase in atmospheric CO2 concentration. This study assessed the impact of elevated CO2 concentration (eCO2, 1000 vs. 400 ppm) on two genotypes of common bean (Phaseolus vulgaris L.), one susceptible and one resistant, infected with bean pod mottle virus (BPMV, Comovirus siliquae). For both genotypes, we found that plant growth, development and physiology were not enhanced under eCO2 enrichment in healthy plants, at the stage of BPMV inoculation. Under eCO2, the number of primary infection sites was reduced in both genotypes. Consistently, viral titre in inoculated leaves was lower, suggesting an enhanced resistance to BPMV in both genotypes under eCO2. To investigate the underlying mechanisms, we studied the expression of genes involved in different antiviral immune pathways: salicylic acid (SA)-signalling, RNA silencing and PAMP-triggered immunity (PTI) pathways. Under our experimental conditions, eCO2 neither primed the SA-signalling pathway nor the PTI pathway, in both genotypes. However, eCO2 seems to prime the RNA silencing pathway in the resistant genotype, and to a lesser extent, in the susceptible genotype.
期刊介绍:
Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.