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
Abstract
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.