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LABORATORY PROCEDURES FOR PLANT CELL VIRUSES

Appendix

PVC/1998/2.03 Appendix 4


CLEAN UP OF MIXED VIRUS INFECTIONS BY SELECTIVE VECTOR TRANSMISSION

 

INTRODUCTION

Viruses that are transmitted by vectors are specialised with respect to their respective vector species. Different vectors and the different acquisition/retention characteristics of a vector species to transmit viruses to their respective host plants is used to separate mixed virus infections and to obtain pure cultures. Often differential insect transmission is combined with a differential host plant approach PVC/1998/2.03 Appendix 3.

 

PROCEDURE

Insect transmissions are essentially done as described in PVC/1998/2.02 Appendix 4. Viruses belonging to different groups are most conveniently separated by using different vector species. Viruses sharing their insect vector, e.g. potyviruses or luteoviruses, are differentially transmitted by A. persicae allowing various access periods for virus acquisition, e.g. 30 sec. for potyvirus acquisition, to support differential acquisition of the viruses present in a mixed infection. Vector transmission is done by using a group of aphids and by timing virus acquisition of each aphid individually.


Guidelines prepared for CABRI by DSMZ, 3 Feb. 1998
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Copyright CABRI, 1998 

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