Articles
A MEMBER OF THE APPLE MOSAIC VIRUS GROUP OCCURRING IN RUBUS
Article number
44_11
Pages
63 – 64
Language
Abstract
Sap-transmissible virus isolates from eight Rubus cultivars in the United States were maintained in cucumber and were found to react in agar gel tests with antiserum prepared against a virus isolated in The Netherlands from apple that exhibited typical symptoms of apple mosaic virus (NApM). In the United States NApMV-related virus isolates were latent in their Rubus hosts: R. idaeus cv.’Willamette’, R. occidentalis cvs. ‘Md 134-J’, ‘Allegany’, ‘Cumberland’, ‘New Logan’ and ‘Munger’, and R. ursinus cvs. ‘Boysen’ and ‘Santiam’. A total of 43 Rubus virus isolates from California, Oregon, and Maryland and the type culture of apple mosaic virus in the United States (ATCC PV-32) reacted positively to NApMV antiserum.
However, none of these Rubus virus isolates that were tested reacted with PV-32 antiserum, and all that were tested failed to produce symptoms when budded into apple seedlings.
NApM sometimes occurred alone in Rubus plants, but often tobacco streak virus was also present.
This is the first report of the serological identification of a member of the apple mosaic virus group in Rubus.
Healthy Willamette and Boysen cultivars planted in the field in Oregon became infected with NApMV within two years in 11/12 and 5/32 cases, respectively, under conditions where natural root graft transmissions were unlikely.
This is the first instance of such field spread in any rosaceous host of a virus that is serologically identified as a member of the apple mosaic virus group.
However, none of these Rubus virus isolates that were tested reacted with PV-32 antiserum, and all that were tested failed to produce symptoms when budded into apple seedlings.
NApM sometimes occurred alone in Rubus plants, but often tobacco streak virus was also present.
This is the first report of the serological identification of a member of the apple mosaic virus group in Rubus.
Healthy Willamette and Boysen cultivars planted in the field in Oregon became infected with NApMV within two years in 11/12 and 5/32 cases, respectively, under conditions where natural root graft transmissions were unlikely.
This is the first instance of such field spread in any rosaceous host of a virus that is serologically identified as a member of the apple mosaic virus group.
Authors
R.H. Converse, R. Casper
Keywords
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