The effect of temperature on days of flower initiation and flowering of tobacco plants. : with special reference to its varietal difference

As written in the other paper, Iow temperature accerelates flower initiation and declreases the number of total leaves. In this paper the effect of temperature on days of fiower initiation and number of total leaves, with special reference to its 'varietal differelrce, are dealt with 16 varieties selected from the Japanese tobacco varieties for fluecuring and those for air-curing were used as material. As shown in table 2, they were Tepeatedly planted on four different dates at about 30 days intervals from April to August in 1955, and were subjected to 8-hburs day. It is because under 8-hours day most of the tobacco varieties have been known to show the least difference in their photoperiodic responses.