At the 1st week, no adventitious shoots had formed. At the 2nd week, small shoots appeared. At the 3rd and 4th weeks, the number of shoots increased mostly in the apical regions (I and II) (Figure 2A). At the 5th week, the number of shoots was approximately 7 in region I and 5 in region II (Figure 2B). In contrast, only a few shoots were formed in regions III and IV.