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 Physioljournal_title
Plant physiologyauthors
Zhao J,Liu Q,Zhang H,Jia Q,Hong Y,Liu Ydoi
10.1104/pp.112.209213subject
Has Abstractpub_date
2013-01-01 00:00:00pages
374-83issue
1eissn
0032-0889issn
1532-2548pii
pp.112.209213journal_volume
161pub_type
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