Centre for Research in Agricultural Genomics, Consejo Superior de Investigaciones Científicas IRTA-UAB-UB, Cerdanyola del Vallès, Barcelona, Spain.
Consejo Superior de Investigaciones Científicas, Barcelona, Spain.
Phytopathology. 2020 Jan;110(1):29-48. doi: 10.1094/PHYTO-07-19-0250-FI. Epub 2019 Nov 29.
The pathological importance of mixed viral infections in plants might be underestimated except for a few well-characterized synergistic combinations in certain crops. Considering that the host ranges of many viruses often overlap and that most plant species can be infected by several unrelated viruses, it is not surprising to find more than one virus simultaneously in the same plant. Furthermore, dispersal of the majority of plant viruses relies on efficient transmission mechanisms mediated by vector organisms, mainly but not exclusively insects, which can contribute to the occurrence of multiple infections in the same plant. Recent work using different experimental approaches has shown that mixed viral infections can be remarkably frequent, up to the point that they could be considered the rule more than the exception. The purpose of this review is to describe the impact of multiple infections not only on the participating viruses themselves but also on their vectors and on the common host. From this standpoint, mixed infections arise as complex events that involve several cross-interacting players, and they consequently require a more general perspective than the analysis of single-virus/single-host approaches for a full understanding of their relevance.
除了某些特定作物中少数几种特征明确的协同组合外，植物中混合病毒感染的病理学重要性可能被低估了。考虑到许多病毒的宿主范围经常重叠，而且大多数植物物种可以被几种不相关的病毒感染，在同一植物中同时发现一种以上病毒并不奇怪。此外，大多数植物病毒的传播依赖于媒介生物（主要但不限于昆虫）介导的有效传播机制，这有助于同一植物中发生多种感染。最近使用不同实验方法的研究表明，混合病毒感染可能非常频繁，以至于它们可以被认为是常态而不是例外。本文综述的目的是描述混合感染不仅对参与的病毒本身，而且对它们的媒介和共同宿主的影响。从这个角度来看，混合感染是复杂的事件，涉及到几个相互作用的参与者，因此需要比单一病毒/单一宿主方法的分析更全面的视角，才能全面了解它们的相关性。
