Influence of Light on Germination of Pinus palustris Seeds |
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| Authors: | B F McLemore Thomas Hansbrough |
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| Institution: | Southern Forest Experiment Station, Forest Service, U.S. Department of Agriculture, Alexandria, Louisiana, and School of Forestry and Wildlife Management, Louisiana State University, Baton Rouge |
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| Abstract: | Red light with a wavelength of 660 nm promotes germination of longleaf pine (Pinus palustris Mill.) seeds, and far-red light (730 nm) inhibits germination. The promotion-inhibition process is repeatedly reversible, indicating that germination is controlled by the photoreversible reaction of phytochrome. Response varied greatly between single-tree lots and was dependent on the length of time seeds were imbibed at 5°C. Dry seeds did not respond to light treatments when they were subsequently imbibed and tested in darkness. Stratification for 28 days essentially removed the light requirements for germination. |
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