... copies of the gene encoding the chalconesynthase (CHS). However, a non-negligible proportion of the transformants did not show flowers with the expectedpurple colour but, rather, the flowers were ... know whether it is positivelyrequired for replication or if, conversely, it constitutes acrucial host defence system. To date, only miRNA mole-cules, either encoded by the host or by the virus ... not yet been characterised,and then propagate in the rest of the organism, likelythrough the blood vessels. This hypothesis is supported by(i) several studies that clearly demonstrate the...