番茄褪绿病毒及植株对其侵染响应性研究进展
2021-07-14陈珂苏洋杨蔡晓锋王全华许萍
陈珂 苏洋杨 蔡晓锋 王全华 许萍
摘 要: 目前全球已知的番茄褪绿病毒(Tomato chlorosis virus,ToCV)分离株系可分成3组,它们在中国境内都有被发现,但仍呈区域性分布.ToCV病害主要通过阻断粉虱传播来防治,更长期有效的防控则基于对植株对ToCV侵染的敏感性和抗性的分子遗传基础的了解,和对病毒具有耐受或者抗性的作物品种的培育.为此,综述了近年来在ToCV基因组方面的研究进展以及不同地区病毒分离株的序列特征,并分析了导致番茄耐病、抗病机理研究滞后的原因.
关键词: 番茄褪绿病毒(ToCV); 流行病学; 植物的病毒抗性
中图分类号: Q 945.8 文献标志码: A 文章编号: 1000-5137(2021)02-0253-06
Research advance onTomato chlorosis virus and plant responses to its infection
CHEN Ke1,2, SU Yangyang1,2, CAI Xiaofeng1,2, WANG Quanhua1,2*, XU Ping1,2*
(1.College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; 2.Development Center ofPlant Germplasm Resources, Shanghai Normal University, Shanghai 200234, China)
Abstract: The worldwide distributedtomato chlorosis virus (ToCV) has spread to several provinces in China,posing a serious threat to tomato (Solanum lycopersicum L.) production.Phylogeny analysis of the sequences of all isolates in NCBI database indicates 3 groups of ToCV,which were all found in China at different times and different areas.At present,the main disease prevention and control relies on the physical and chemical measures to limit whiteflies.In the long run,the most efficient control based on the understanding about the tomato plants molecular genetic mechanism of their disease resistance and tolerance on ToCV.Here we review the research progress on ToCV genome and the sequence features of known isolates from different areas,and analyze the challenge in elucidating the molecular mechanisms and developing disease resistant varieties in tomato.
Key words:Tomato chlorosis virus(ToCV); epidemiology; genetic resistance
0引言
番茄褪綠病毒(Tomato chlorosis virus,ToCV)属长线形病毒科的毛形病毒属.毛形病毒属包含多种对农业生产危害较大的病毒,它们可以感染葫芦科、茄科和芸香科等重要经济作物,并引起严重病害.世界各国都展开了对相关病毒及其流行病学的研究,并探讨和尝试控制病害的不同方法[1].中国是世界上最大的番茄(Solanum lycopersicum L.)生产国(http://www.fao.org/faostat/),由ToCV引起的番茄病害在中国频繁发生,对中国番茄种植业造成了严重威胁[2].为此,本文作者在前期综述的基础上,进一步梳理更新近年来世界各国对该病毒及其感病机理的研究进展,以期为包括番茄在内作物的抗病育种工作等提供参考.
1 病毒基因组
ToCV是毛形病毒属14个成员之一,最早发现于1998年对美国佛罗里达州番茄植株黄叶病症的分析[3].ToCV的病毒粒子在电子扫描显微镜下呈现出弯曲棒状结构,长度……