An ultrastructural and microspectrophotometric study of leaf initiation in germinating Pinus banksiana seeds

Abstract

Gymnosperm trees are among the most economically important plants in the world, supplying raw products for the construction, paper and chemical industries. Most anatomical research, therefore, has been directed toward the cambium, the lateral meristem which produces the secondary xylem or wood. There has been a limited amount of research done on the shoot apical meristem of mature trees. This literature has been reviewed elsewhere and will not be covered here (Korody, 1937;