Prunus necrotic ring spot virus: Transmission and Movement in Tissue of Stone Fruit Trees

The results showed that Prunus necrotic ring spot virus (PNRSV) was carried internally and externally in seeds of many types of stone fruit trees in different ratios. The seed transmission ratios were 5.2, 28.4, and 19 % in seeds of apricot, peach and plum trees, respectively. The results also declared the existence of PNRSV in various parts of the infected trees in different ratios in buds, petals, leaves, pollen grains, fruits and roots. The viral symptoms on the leaves disappeared and virus concentration is decreased (OD= 0.160,0.310,0.140in mid of July while virus concentration increased (OD=0.160., 0.290 ,0.160 ) in the roots of apricot, peach and plum trees, respectively.