Martín Susana, Elena Santiago F
Instituto de Biología Molecular y Celular de Plantas (CSIC-UPV), 46022 València, Spain.
The Santa Fe Institute, Santa Fe, NM 87501, USA.
J Gen Virol. 2009 Nov;90(Pt 11):2815-2820. doi: 10.1099/vir.0.012351-0. Epub 2009 Jul 8.
Natural mixed infections of plant viruses are frequent, often leading to unpredictable variations in symptoms, infectivity, accumulation and/or vector transmissibility. Cauliflower mosaic caulimovirus (CaMV) has often been found in mixed infections with turnip mosaic potyvirus (TuMV) in plants of the genus Brassica. This study addressed the effect of mixed infection on infectivity, pathogenicity and accumulation of CaMV and TuMV in Arabidopsis thaliana plants inoculated mechanically with cDNA infectious clones. In singly infected plants, TuMV accumulation was approximately 8-fold higher than that of CaMV. In co-infected plants, there was 77 % more TuMV accumulation compared with single infections, whilst the accumulation of CaMV was 56 % lower. This outcome describes a biological game in which TuMV always plays the winner strategy, leading to the competitive exclusion of CaMV. However, the infectivity of each virus was not affected by the presence of the other, and no symptom synergism was observed.
植物病毒的自然混合感染很常见，常常导致症状、感染性、积累量和/或介体传播能力出现不可预测的变化。在芸苔属植物中，经常发现花椰菜花叶病毒（CaMV）与芜菁花叶病毒（TuMV）混合感染。本研究探讨了混合感染对用cDNA感染性克隆机械接种的拟南芥植株中CaMV和TuMV的感染性、致病性和积累量的影响。在单感染植株中，TuMV的积累量比CaMV高约8倍。在共同感染的植株中，与单感染相比，TuMV的积累量增加了77%，而CaMV的积累量则降低了56%。这一结果描述了一场生物学博弈，其中TuMV总是采取获胜策略，导致CaMV被竞争性排除。然而，每种病毒的感染性不受另一种病毒存在的影响，并且未观察到症状协同作用。
