Premium
KINETICS OF P fr APPEARANCE IN Amaranthus caudatus ‡
Author(s) -
Kendrick R.E.,
Kome J.,
Jaspers P. A. P. M.
Publication year - 1985
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.1751-1097.1985.tb01648.x
Subject(s) - kinetics , phytochrome , arrhenius equation , activation energy , chemistry , analytical chemistry (journal) , biophysics , botany , biology , red light , chromatography , physics , quantum mechanics
— The kinetics of the far‐red absorbing form of phytochrome (P fr ) appearance from intermediates in the pathway from the red absorbing form of phytochrome (P r ) to P fr that accumulate under high fluence rate white light have been investigated in 3‐day old dark grown Amaranthus caudatus seedlings. The appearance of P (r after a 5 s white light pulse was measured over the temperature range ‐8 to 25 ° C in samples flushed with O 2 or N 2 . Over the whole temperature range under anaerobic conditions the kinetics of the slowest component of P fr appearance are faster than in the presence of O 2 . Arrhenius plots are linear over this temperature range and indicate the activation energy for the slowest component of P fr appearance is 44.05 ± 1.97 kJ mol −1 for O 2 and 53.69 ± 4.86 kJ mol −1 for N 2 .