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Maturation of Sweetgum and American Sycamore Seeds

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Over three consecutive years in central Mississippi, sweetgum (Liquidambar styraciflua L.) and sycamore (Platanus occidentalis L.) fruits had nearly reached full-size by late June. Sweetgum seeds were physiologically mature by mid-August, but dry weight increased until late September. As sweetgum seeds matured, the crude fat level rose to 27 percent of seed dry weight. During maturation, concentrations of soluble nitrogen, soluble carbohydrates, and magnesium decreased, while those of protein nitrogen and phosphorus increased. Sycamore seeds became physiologically mature by early September. Chemical changes in sycamore were similar to those in sweetgum, except that the major food reserves were carbohydrates and not fats. Forest Sci. 18:223-231.
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Keywords: Liquidambar styraciflua; Platanus occidentalis; chemical analysis

Document Type: Journal Article

Affiliations: Principal Silviculturist at the Forest Tree Seed Laboratory, maintained at State College, Miss.

Publication date: 1972-09-01

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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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    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
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