Abstract
The optimal temperature for multiplication of a common strain TMV(C) in submerged leaf disks was close to 24 °C. At 28 ° virus concentration decreases around the ninth day after inoculation. At 35 ° multiplication of the common strain is very low and capsids accumulate, but there is no parallel accumulation of free viral RNA. This suggests that at 35 ° and to a lesser degree at other temperatures that are not optimal, replication of viral RNA is inhibited. A “thermophilic” strain, TMV(LB), which develops actively at 36 ° was isolated. At 24 ° the multiplication of this strain was accompanied by a significant accumulation of capsids. At this same temperature the plants ( Nicotiana tabacum var. Samsun) inoculated with the thermophilic strain did not develop symptoms.
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