黄色種タバコエムシーとブライト・エローの糖含量の差異について

抄録

Sugar of flue-cured tobacco leaf is one of the most important constituents that affect the smoking taste and the physical properties of the cured leaf. In the present experiment, to find out the difference of sugar content of leaves between new variety, MC which was bred for low nicotine and mild tobacco, and Bright Yellowr (BY) which has been widely grown, sugar contents of each cured leaf of both the varieties grown in the several districts were investigated. As the results, it was found in many districts that sugar content of upper leaves of MC was hardly decreased compared with that of the leaf at the middle position on the stem which shows the maximum sugar content in the plant. This characteristic of new variety was especially conspicuous at Kanto district: that is, sugar content of the uppermost leaf was the highest of all leaves in the plant. It was also found that high sugar content of the upper leaves of MC corresponded to the high distribution ratio of dry matter to the upper leaves, and that this was correlated with increment of the total dry matter of whole leaves in the plant. The reason why sugar content of the upper leaves of MC often shows high value, was discussed with regard to the difference of leaf number harvested and distribution of activity of root system between both the varieties