ISHS Acta Horticulturae 186: IV International Symposium on Small Fruit Virus Diseases
TRANSMISSION OF A VIRUS FROM FRAGARIA VESCA INFECTED WITH STRAWBERRY MOTTLE VIRUS TO CHENOPODIUM QUINOA |
| Authors: | A.N. Adams, D.J. Barbara |
| Abstract:
Strawberry aphids (Chaetosiphon fragaefolii) given access to Fragaria vesca (VS1) infected with strawberry mottle virus and transferred to Chenopodium quinoa induced symptoms of mild vein banding, vein necrosis and epinasty. Similar symptoms were obtained with all five isolates of mottle tested. Sap transmission from VS1 to C. quinoa was rarely successful and from C. quinoa to C. quinoa the results were variable despite attempts to optimise extraction buffers and the growing conditions of the plants. Inoculation of twenty other plant species by aphids resulted in symptoms only in Chenopodium murale, C. foliosum and Vigna sinensis cv. Blackeye but sap transmission from these plants to C. quinoa was not successful, indicating that none was a better host than C. quinoa for the pathogen. There is uncertainty whether the symptoms in C. quinoa are caused by the same pathogen as strawberry mottle; attempts to transmit from C. quinoa to VS1 by aphids and by grafting have not resulted in symptoms. However, a preliminary analysis of dsRNA from plants of VS1 and C. quinoa infected by aphids from the same isolate of mottle gave similar results: two components were detected in both species with molecular weights of approximately 5.4 x 106 and 4.6 x 106 daltons. | |
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