Fig. 2From: Seasonal variations of auxin and gibberellin A4 levels in cambial-region tissues of three conifers (Pinus elliottii, Chamaecyparis obtusa, and Cryptomeria japonica) with inherently different wood densitiesAnnual ring formation in three conifers. Test periods I–V refer to the periods shown in Fig. 1. Data are means ± SD (n = 3 or 4)Back to article page