PARTIAL ELIMINATION OF VIRUS FROM DOUBLY INFECTED ORCHIDS BY MERISTEM EXPLANT CULTURE
The elimination of viruses by means of meristem culture has been widely used (Hollings, 1965). Since the initial investigations of Morel and Martin (1952), this technique has been successfully applied in producing virus-free plants from infected source plants in a number of cultivated crops.
The literature does not indicate much success in the elimination of virus infections in the Orchidaceae. Morel (1962) was able to free Cymbidium from the Cymbidium mosaic virus. Although much effort apparently has been expended towards attaining this goal, the results have been poor. In light of Morel's results and those obtained for the potato viruses X and Y by Stace-Smith and Mellor (1967), it appears that this technique can be successfully applied to obtain virus-free plants from additional orchid genera infected with virus. This paper reports results of investigation to free such viruses from the Cattleya alliances.