Fig. 2From: Effects of crown length on indole acetic acid (IAA) amounts in cambial region tissues in lower and upper trunks of sugi cultivars (Cryptomeria japonica) in SeptemberLatewood formation at sampling date (September) of sugi cultivars. The cross sections were obtained from samples for IAA measurements. The cambial region tissues without secondary wall were removed and homogenized for methanol extraction. Latewood tracheids in secondary wall formation were observed (arrows)Back to article page