Abstract
Somatic embryogenesis was induced in Siberian larch by in vitro culturing zygotic embryos at different developmental stages. Cultures were grown in modified Murashige and Skoog medium supplemented with hormones 2,4-dichlorophenoxyacetic acid (2 mg/l) and 6-benzylaminopurine (0.5–1 mg/l). The success of somatic embryogenesis in this species depended on the tree genotype and developmental stage of embryos used for culturing. Somatic embryogenesis from immature zygotic embryos at the stage of cotyledon initiation was most active. After 5–10 days, such embryos formed the embryogenic tissue including two cell types—elongated highly vacuolated embryonic tubes and small embryonic cells. Somatic embryos were isolated from proliferating embryogenic tissues after 2 months of culture.
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