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Influence of Light on Germination of Pinus palustris Seeds
Author(s) -
McLemore B. F.,
Hansbrough Thomas
Publication year - 1970
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1970.tb06385.x
Subject(s) - germination , darkness , phytochrome , pinus <genus> , stratification (seeds) , botany , far red , biology , red light , horticulture , agronomy , dormancy , seed dormancy
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.