This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Vidaver, W. Articles by Hsiao, A. I-H. Search for Related Content PubMed PubMed Citation Articles by Vidaver, W. Articles by Hsiao, A. I-H. Agricola Articles by Vidaver, W. Articles by Hsiao, A. I-H.

Articles

Phytochrome Transformation in Lettuce Seed Irradiated at Various Temperatures ¹

^a Simon Fraser University, Photobiology Group, Burnaby, British Columbia, Canada

Phototransformation of phytochrome in lettuce seeds (Lactuca sativa L. var. Grand Rapids) was examined by testing germination responses of seeds irradiated at various temperatures. Temperature variations from 0 to 50 C had no influence on the germination of partially hydrated seeds (about 15% water content) irradiated with either red or far red light prior to imbibition. At –15 C far red light more effectively retarded germination than red light promoted it. No effective phototransformation was detected at –79 C or –196 C.