ABSTRACT For more than 15 years, somatic embryogenesis (SE)-derived trees of Cryptomeria japonica (Japanese cedar, sugi) and Chamaecyparis obtusa (Japanese cypress, hinoki), the main afforestation tree species in Japan, have been growing at Chiyoda Tree Nursery (Kasumigaura, Ibaraki, Japan). These SE-derived trees were planted in 2006, and their initial growth (in 2008, 2009, and 2010) and growth after 16 years were measured. The average diameter at breast height (DBH) was 12.03 cm for sugi and 9.79 cm for hinoki, and the tree height was measured over 10 m in 2022. SE-derived trees showed that no significant disturbances other than shade-induced wilting were observed, and wood properties (stress wave velocity) were generally in the normal range. Because the stand was densely planted as a sample forest for SE-derived trees, the current data cannot be directly compared to other reforestation sites. However, these reports that the SE-derived sugi and hinoki trees are still existing without any growth problems will provide valuable data for promoting Japanese afforestation with SE-derived trees.
Somatic embryogenesis-derived trees of two major Japanese afforestation conifers, Cryptomeria japonica and Chamaecyparis obtusa, planted in sample forests
Momi Tsuruta,Tsuyoshi E. Maruyama,Saneyoshi Ueno
Published 2025 in Journal of Forest Research
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2025
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Journal of Forest Research
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2025-11-11
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