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Respiratory and Biochemical Changes During Germination of Longleaf and Slash Pine Seeds

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Abstract:

Respiratory quotients for longleaf pine (Pinus palustris Mill.) seeds were generally lower than for slash pine (P. elliottii Engelm.). The values for longleaf pine peaked when the radicle emerged. Changes in lipid and soluble-sugar contents of longleaf pine seeds indicate that the rise in respiratory quotients reflected a change in respiratory substrate from lipids to sugars when the radicle emerged. Before germination started, protein contents of seeds of the two species were almost identical. During the first 10 days of germination and seedling development, protein levels in slash pine increased in all seed parts faster than those in longleaf pine. The differences in respiratory activity and nitrogen metabolism between the two species indicate that their metabolic pathways were differentially used during germination and early seedling development. Forest Sci. 16:350-355.

Keywords: Pinus elliottii; Pinus palustris; lipids; proteins; soluble sugar

Document Type: Journal Article

Affiliations: Professor of Plant Physiology, Botany Dep., Duke Univ., Durham, N. C.

Publication date: September 1, 1970

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.
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