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Replication in the phloem is not necessary for efficient vascular transport of tobacco mosaic tobamovirus
Author(s) -
Susi Petri
Publication year - 1999
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(99)00282-3
Subject(s) - tobacco mosaic virus , tobamovirus , phloem , plasmodesma , biology , virology , viral replication , plant virus , inoculation , vascular tissue , mosaic virus , virus , botany , horticulture , cell wall
Plant viruses move systemically from one leaf to another via phloem. However, the viral functions needed for systemic movement are not fully elucidated. An experimental system was designed to study the effects of low temperature on the vascular transport of the tobacco mosaic tobamovirus (TMV). Vascular transport of TMV from lower inoculated leaves to upper non‐inoculated leaves via a stem segment kept at low temperature (4°C) was not affected. On the other hand, several experiments were performed on tobacco leaves to demonstrate that virus replication did not occur at the same temperature. The data suggest that replication of TMV in the phloem of wild‐type tobacco plants is not necessary for the vascular transport of TMV, and that the virus moves with photoassimilates as suggested previously.