ISHS Acta Horticulturae 56: Symposium on Juvenility in Woody Perennials
BIOCHEMICAL CHANGES DURING GYMNOSPERM DEVELOPMENT |
| Author: | D.J. Durzan |
| Abstract:
With the expected increases in demands for wood and forest products, juvenility becomes important from two practical views. For reforestation programs juvenile trees must be selected that are responsive to silvicultural treatment. For intensive cultivation, seed procurement depends on having juvenile trees that mature and bear fruit early. Each aspect has a morphological and biochemical basis amenable only to limited study and control. The fertilization of juvenile trees contributes to and often encourages a greater final size. Since nitrogen deficiency often limits productivity, the fate of N amendments stimulating wood formation is examined. Nutritional and environmental stresses encourage sequential biochemical changes associated with the induction of flowering. The ways nitrogen and carbon metabolism change in coniferous buds and shoot apices to encourage the development of reproductive cones is considered against the evolving morphogenetic events. | |
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