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Floral Initiation and Development in Quaking Aspen

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Abstract:

The initiation and development of unisexual and bisexual flowers of Populus tremuloides were investigated in whole mounts and tissue sections. In the New Haven, Connecticut area, the morphological changes marking the transition from a presumably vegetative meristem to a floral meristem began in early June. Differentiation of pistils and stamens occurred in early July. Archespores were formed in late July in anthers and by mid-September in ovules. The similarity in time of initiation and development of unisexual and bisexual flowers, and the absence of reduced organs of the opposite sex in unisexual flowers suggest that neither minor changes in photoperiod, nor seasonal trends in temperature, can be major factors in the variation in sex expression of this species.

Document Type: Journal Article

Affiliations: Assistant Professor, Univ. of Wisconsin

Publication date: 1963-09-01

More about this publication?
  • 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.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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