Effects of Different Scion-Rootstock Combinations on Contents of Aroma Components in Flue-cured Tobacco

An experiment was conducted to investigate the effects of different scion-rootstock combinations on the contents of aroma components in flue-cured tobacco leaves by taking tobacco varieties NC297 and Changbohuang as scions and varieties ZY90 and Jinxing 6007 as rootstocks. The aroma component contents in ungrafted and grafted seedlings were compared. The results showed that:1) The aroma component contents in grafted NC297 exhibited dominance over their parents, and those in grafted Changbohuang were between those in their parents. 2) Comparing with scion seedlings, the aroma component contents in leaves of grafted tobacco increased; in grafted NC297 seedlings, the combination with ZY90, and in grafted Changbohuang seedlings, the combination with Jinxing 6007 increased higher. 3) Scions significantly affected the aroma component contents in leaves of grafted tobacco; for the same rootstock grafted with different scions, the order of aroma component contents in leaves was consistent with that in scion tobaccos. Therefore, choosing appropriate scion was the key factor for increasing the aroma component contents in flue-cured tobacco leaves, and the selected combinations in this experiment were NC297-ZY90 and Changbohuang-Jinxing 6007.