Fig. 7From: The “chi-chi” of Ginkgo biloba L. grows downward with horizontally curving tracheids having compression-wood-like featuresFE-SEM micrograph of the cell wall of sample A-2 in Fig. 3b. The image shows the lack of an S3 layer, and S2 layer microfibrils were oriented in Z-helix with 45°. Scale bar, 3 µmBack to article page