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PHYTOCHROME‐MEDIATED GERMINATION: EFFECTS OF BRIEF HIGH TEMPERATURE TREATMENTS
Author(s) -
McDonough Walter T.
Publication year - 1967
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1967.tb09657.x
Subject(s) - germination , phytochrome , lability , incubation , irradiation , horticulture , biology , incubation period , botany , chemistry , biochemistry , red light , physics , nuclear physics
— Brief high temperature treatments, applied early in the pregerminative period to radiation‐requiring seeds of lettuce, inhibited both dark and radiation‐induced germination. The inhibition increased with increasing incubation temperature. There was little difference in the germination percentage whether the inductive irradiation was applied before or after the high temperature treatment. When the high temperature treatment preceded induction, there was an increase in the radiation dosage required for maximum germination. These findings are interpreted in terms of lability of physiologically active phytochrome to higher temperatures.