Salicylic acid can induce resistance to plant virus movement
Salicylic acid can induce resistance to plant virus movement
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DOI：
10.1094/mpmi.1998.11.9.860
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发表时间：
1998-09-01
影响因子：
3.5
通讯作者：
Carr, JP
中科院分区：
文献类型：
--
作者：
Naylor, M;Murphy, AM;Carr, JP
水杨酸（SA）处理抑制烟草花叶病毒（TMV）在接种组织中的复制。此外，抗性是通过一种新的防御信号转导途径诱导的，该途径对水杨基异羟肟酸（SHAM; S. Chivasa，A. M.墨菲，M。Naylor和J. P.卡尔，植物细胞9：547-557，1997），该研究的目的是确定SA是否可以抑制除TMV以外的病毒的复制，如果是，SHAM是否也可以防止对其它病毒的抗性，SA处理降低了马铃薯X病毒（PVX）RNA在接种烟草叶片组织中的积累，并且抗性依赖于SHAM敏感的信号通路。然而，虽然黄瓜花叶病毒（CPI-IV）感染的症状在SA处理的烟草植株延迟，这不是由于抑制复制，而是抑制病毒的系统运动。（14 C）O（2）-饲养试验表明，SA诱导的对CMV的抗性不是光诱导转运的副产物，而SHAM则能显著抑制SA诱导的对CMV的抗性。因此，SHAM敏感的信号途径激活了两种抗性机制：抑制CMV的长距离移动和抑制TMV和PVX的复制。
Salicylic acid (SA) treatment has recently been reported to inhibit replication of tobacco mosaic virus (TMV) in inoculated tissue. Furthermore, resistance is induced via a novel defensive signal transduction pathway sensitive to inhibition by salicylhydroxamic acid (SHAM; S. Chivasa, A. M. Murphy, M. Naylor, and J. P. Carr, Plant Cell 9: 547-557, 1997), The goals of this study were to determine if replication of viruses other than TMV could be inhibited by SA and, if so, whether the resistance to other viruses could also be prevented by SHAM, Potato virus X (PVX) RNA accumulation in inoculated tobacco leaf tissue was reduced by SA treatment and resistance was dependent on the SHAM-sensitive signaling pathway. However, although symptoms of cucumber mosaic virus (CPI-IV) infection were delayed in SA-treated tobacco plants, this was not due to inhibition of replication but rather to inhibition of systemic movement of the virus. (14C)O(2)-feeding experiments indicated that SA-induced interference with long-distance virus movement is not a by-product of disrupted photosynthate translocation, Significantly, SA-induced resistance to CMV was abolished by SHAM, Thus, the SHAM-sensitive signaling pathway activates both resistance mechanisms: inhibition of long-distance CMV movement and inhibition of TMV and PVX replication.