玉米 Rop1 可能参与植物对病毒感染的防御反应。
Possible involvement of maize Rop1 in the defence responses of plants to viral infection.
机构信息
State Key Laboratory of Agro-biotechnology and Department of Plant Pathology, China Agricultural University, Beijing 100193, China.
出版信息
Mol Plant Pathol. 2012 Sep;13(7):732-43. doi: 10.1111/j.1364-3703.2011.00782.x. Epub 2012 Feb 14.
Abstract
The expression of host genes can be altered during the process of viral infection. To investigate the viral infection-induced up-regulated gene expression changes of maize at different time intervals post-inoculation with Sugarcane mosaic virus (SCMV), a suppression subtractive hybridization cDNA library was constructed. A total of 454 cDNA clones were identified to be viral infection-induced up-regulated genes. The influence of Rop1 on the infection of maize by SCMV was investigated. The results showed that transient silencing of the ZmRop1 gene through virus-induced gene silencing enhanced the accumulation and systemic infection of SCMV and another potyvirus (Pennisetum mosaic virus) in maize plants, whereas transient over-expression of ZmRop1 in maize protoplasts reduced SCMV accumulation. Furthermore, it was demonstrated that the heterologous expression of ZmRop1 impaired Potato virus X infection in Nicotiana benthamiana plants. These data suggest that ZmRop1 may play a role in plant defence responses to viral infection.
摘要
在病毒感染过程中，宿主基因的表达可以发生改变。为了研究玉米在感染甘蔗花叶病毒（SCMV）后的不同时间间隔内病毒感染诱导的基因表达上调变化，构建了抑制性消减杂交 cDNA 文库。共鉴定出 454 个 cDNA 克隆为病毒感染诱导的上调基因。研究了 Rop1 对 SCMV 感染玉米的影响。结果表明，通过病毒诱导的基因沉默瞬时沉默ZmRop1 基因增强了 SCMV 和另一种马铃薯Y 病毒（Pennisetum mosaic virus）在玉米植株中的积累和系统感染，而ZmRop1 在玉米原生质体中的瞬时过表达则降低了 SCMV 的积累。此外，还证明了 ZmRop1 的异源表达可损害马铃薯 X 病毒在本氏烟植株中的感染。这些数据表明，ZmRop1 可能在植物对病毒感染的防御反应中发挥作用。
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