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Notes: Date of Pollen Shedding by Longleaf Pine Advanced by Increased Temperatures at Strobili

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Abstract:

Air temperatures in the microenvironments of flower buds of Pinus palustris Mill. appear to be a major determinant of flowering date. Shoots bearing staminate strobili on each of 10 trees were bagged at different times and for varying lengths of time in January and February. Bagging treatments provided 488 to 3,852 additional degree-hr of heat above 50°F accumulated from January 1. Flowering date was advanced more or less in proportion to added heat, up to an average of 8.6 days ahead of unbagged controls. Individual trees varied widely in date of pollen shedding. Forest Sci. 19:315-318.

Keywords: Pinus palustris; heat sums; phenology

Document Type: News

Affiliations: Professor of Forestry, University of Tennessee, Knoxville

Publication date: 1973-12-01

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

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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