Systemically infected plants, virus is present in nearly all organs and issues of the plants, therefore the parts from mother plants used for vegetative propagation e.g.
Cutting
Ø Tubers
Ø Corms Bulbs
Ø Rhizomes
These organs always contain virus and so it will be transmitted to progeny. This means of transmission is very important for all these plants. Apical meristems of systemically infected plants are, however, virus-free and by tissue culture virus-free plants may be grown from tips of virus infected plants.
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