Bud Development in Lodgepole Pine

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Formation of a new terminal bud in lodgepole pine begins during the period of active shoot elongation. Typical terminal buds contain three cycles of lateral appendages and are termed "polycyclic." Observations of the progress of short-shoot and long-shoot bud morphogenesis at selected levels within each shoot cycle showed that the period of bud formation lasted from May until October. There were development gradients within and between cycles. Needle primordia in the upper cycle did not form until the following spring. The delayed development of major lateral buds appears to be an important determinant of crown form. Forest Sci. 17:479-486.

Keywords: Pinus contorta; Shoot growth; morphogenesis

Document Type: Journal Article

Affiliations: Dep. of Forest Science, Utah State University, Logan

Publication date: December 1, 1971

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  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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