Infection of Beet Necrotic Yellow Vein Virus with RNA4-encoded P31 Specifically Up-regulates Pathogenesis-related Protein 10 in Nicotiana Benthamiana

Overview

Journal Virol J

Publisher Biomed Central

Specialty Microbiology

Date 2014 Jun 26

PMID 24961274

Citations 11

Authors

Wen-Qi Wu

Hui-Yan Fan

Ning Jiang

Ying Wang

Zong-Ying Zhang

Yong-Liang Zhang

Xian-Bing Wang

Da-Wei Li

Jia-Lin Yu

Cheng-Gui Han

Affiliations

Soon will be listed here.

Abstract

Background: Beet necrotic yellow vein virus (BNYVV) is the infectious agent of sugar beet rhizomania, which consists of four or five plus-sense RNAs. RNA4 of BNYVV is not essential for virus propagation in Nicotiana benthamiana but has a major effect on symptom expression. Early reports showed that RNA4-encoded P31 was associated with severe symptoms, such as curling and dwarfing, in N. benthamiana.

Results: We discovered that the pathogenesis-related protein 10 (PR-10) gene can be up-regulated in BNYVV-infected N. benthamiana in the presence of RNA4 and that it had a close link with symptom development. Our frame-shift, deletion and substitution analysis showed that only the entire P31 could induce PR-10 up-regulation during BNYVV infection and that all the tryptophans and six cysteines (C174, C183, C186, C190, C197 and C199) in the cysteine-rich P31 had significant effects on PR-10 expression. However, P31 could not interact directly with PR-10 in yeast.

Conclusions: Our data demonstrated that only integrated P31 specifically induced PR-10 transcription, which coincided closely with the appearance of severe symptoms in BNYVV-infected N. benthamiana, although they could not interact directly with each other in yeast.

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