Functional analysis of a viroid RNA motif mediating cell-to-cell movement in Nicotiana benthamiana
文献类型： 外文期刊
作者：
Jiang, Dongmei
2
;
Wang, Meng
1
;
Li, Shifang
2
;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China
2.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
3.Ohio State Univ, Ctr Appl Plant Sci, Columbus, OH 43210 USA
关键词： viroid;function;RNA;motif;movement
期刊名称：JOURNAL OF GENERAL VIROLOGY （ 影响因子：3.891； 五年影响因子：3.719 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： Cell-to-cell trafficking through different cellular layers is a key process for various RNAs including those of plant viruses and viroids, but the regulatory mechanisms involved are still not fully elucidated and good model systems are important. Here, we analyse the function of a simple RNA motif (termed 'loop19') in potato spindle tuber viroid (PSTVd) which is required for trafficking in Nicotiana benthamiana leaves. Northern blotting, reverse transcriptase PCR (RT-PCR) and in situ hybridization analyses demonstrated that unlike wild-type PSTVd, which was present in the nuclei in all cell types, the trafficking-defective loop19 mutants were visible only in the nuclei of upper epidermal and palisade mesophyll cells, which shows that PSTVd loop19 plays a role in mediating RNA trafficking from palisade to spongy mesophyll cells in N. benthamiana leaves. Our findings and approaches have broad implications for studying the RNA motifs mediating trafficking of RNAs across specific cellular boundaries in other biological systems.
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