The rubisco small subunit is involved in tobamovirus movement and Tm-2²-mediated extreme resistance.

Abstract:

:The multifunctional movement protein (MP) of Tomato mosaic tobamovirus (ToMV) is involved in viral cell-to-cell movement, symptom development, and resistance gene recognition. However, it remains to be elucidated how ToMV MP plays such diverse roles in plants. Here, we show that ToMV MP interacts with the Rubisco small subunit (RbCS) of Nicotiana benthamiana in vitro and in vivo. In susceptible N. benthamiana plants, silencing of NbRbCS enabled ToMV to induce necrosis in inoculated leaves, thus enhancing virus local infectivity. However, the development of systemic viral symptoms was delayed. In transgenic N. benthamiana plants harboring Tobacco mosaic virus resistance-2² (Tm-2²), which mediates extreme resistance to ToMV, silencing of NbRbCS compromised Tm-2²-dependent resistance. ToMV was able to establish efficient local infection but was not able to move systemically. These findings suggest that NbRbCS plays a vital role in tobamovirus movement and plant antiviral defenses.

journal_name

Plant Physiol

journal_title

Plant physiology

authors

Zhao J,Liu Q,Zhang H,Jia Q,Hong Y,Liu Y

doi

10.1104/pp.112.209213

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

374-83

issue

1

eissn

0032-0889

issn

1532-2548

pii

pp.112.209213

journal_volume

161

pub_type

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