Advances in understanding begomovirus satellites.
Advances in understanding begomovirus satellites.
复制标题
DOI：
10.1146/annurev-phyto-082712-102234
复制
发表时间：
2013-08
影响因子：
10.2
通讯作者：
Xue-ping Zhou
中科院分区：
文献类型：
--
作者：
Xue-ping Zhou
菜豆花叶病毒属（Begomoviruses）是在许多作物中引起毁灭性疾病的众多且地理上广泛分布的病毒。单分型菜豆花叶病毒经常与β卫星或β卫星相关。betasatellite和natasatellite DNA基因组的大小约为菜豆花叶病毒DNA基因组的一半。β卫星是诱发典型疾病症状所必需的。β卫星编码的βC1基因在症状诱导、抑制转录和转录后基因沉默中具有重要作用，并可影响茉莉酸应答基因。菜豆花叶病毒的宿主植物进化出了多种针对βC1蛋白的先天防御机制来应对这些挑战。α卫星主要在与β卫星相关的单分裂菜豆花叶病毒中鉴定，并且对菜豆花叶病毒-β卫星疾病复合体的发病机制没有已知的贡献。当前分子工具的应用促进了病毒诊断和双生病毒和卫星DNA的新物种的发现，也促进了我们对卫星DNA的全球多样性和进化的理解。
Begomoviruses are numerous and geographically widespread viruses that cause devastating diseases in many crops. Monopartite begomoviruses are frequently associated with betasatellites or alphasatellites. Both betasatellite and alphasatellite DNA genomes are approximately half the size of begomovirus DNA genomes. Betasatellites are essential for induction of typical disease symptoms. The βC1 genes encoded by the betasatellites have important roles in symptom induction, in suppression of transcriptional and posttranscriptional gene silencing, and they can affect jasmonic acid responsive genes. Host plants of begomoviruses have evolved diverse innate defense mechanisms against the βC1 protein to counter these challenges. Alphasatellites have been identified mainly in monopartite begomoviruses that associate with betasatellites and have no known contributions to pathogenesis of begomovirus-betasatellite disease complexes. Applications of current molecular tools are facilitating viral diagnosis and the discovery of novel species of geminiviruses and satellite DNAs and are also advancing our understanding of the global diversity and evolution of satellite DNAs.