从矮牵牛内源性前病毒诱导传染性矮牵牛叶脉黄化（类逆转录）病毒。
Induction of infectious petunia vein clearing (pararetro) virus from endogenous provirus in petunia.
作者信息
Richert-Pöggeler Katja R, Noreen Faiza, Schwarzacher Trude, Harper Glyn, Hohn Thomas
机构信息
Friedrich Miescher Institute, PO Box 2543, CH-4002 Basel, Switzerland.
出版信息
EMBO J. 2003 Sep 15;22(18):4836-45. doi: 10.1093/emboj/cdg443.
Abstract
Infection by an endogenous pararetrovirus using forms of both episomal and chromosomal origin has been demonstrated and characterized, together with evidence that petunia vein clearing virus (PVCV) is a constituent of the Petunia hybrida genome. Our findings allow comparative and direct analysis of horizontally and vertically transmitted virus forms and demonstrate their infectivity using biolistic transformation of a provirus-free petunia species. Some integrants within the genome of P.hybrida are arranged in tandem, allowing direct release of virus by transcription. In addition to known inducers of endogenous pararetroviruses, such as genome hybridization, tissue culture and abiotic stresses, we observed activation of PVCV after wounding. Our data also support the hypothesis that the host plant uses DNA methylation to control the endogenous pararetrovirus.
摘要
已证实并表征了内源性副逆转录病毒通过游离型和染色体型两种形式的感染，同时有证据表明矮牵牛脉明病毒（PVCV）是矮牵牛基因组的一个组成部分。我们的研究结果允许对水平和垂直传播的病毒形式进行比较和直接分析，并通过对无原病毒矮牵牛物种进行基因枪转化来证明它们的感染性。矮牵牛基因组中的一些整合体串联排列，允许通过转录直接释放病毒。除了已知的内源性副逆转录病毒诱导剂，如基因组杂交、组织培养和非生物胁迫外，我们还观察到受伤后PVCV的激活。我们的数据也支持宿主植物利用DNA甲基化来控制内源性副逆转录病毒这一假说。
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