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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Fig. 4 | Journal of Wood Science

Fig. 4

From: Relationship between formation of earlywood vessels and leaf phenology in two ring-porous hardwoods, Quercus serrata and Robinia pseudoacacia, in early spring

Fig. 4

Light micrographs showing transverse and radial images of differentiating vessel elements in Q. serrata on 20th and 24th April. On 20th April, deposition of secondary walls in first earlywood vessels was evident at the top of the stem (a), 4 m above the ground (c) and near the ground (e). Radial images revealed the perforations (no end walls) at the top of the stem (b), while end walls of earlywood vessels (arrows) were observed 4 m above the ground (d) and near the ground (f). On 24th April, earlywood vessels with deposition of secondary walls were observed at the top of the stem (g) and near the ground (i). Radial images revealed that perforations at the top of the stem (h) and near the ground (j). Bars 100 µm (a, b, d, f–h, j) and 200 µm (c, e, i)

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