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THE PHYTOCHROME REACTION IN LEMNA MINOR L. *
Author(s) -
Rombach J.
Publication year - 1966
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.1751-1097.1966.tb05946.x
Subject(s) - phytochrome , lemna minor , red light , far red , frond , chemistry , botany , biophysics , kinetin , red clover , action spectrum , biology , biochemistry , in vitro , tissue culture , ecology , aquatic plant , macrophyte
of the lecture— Multiplication rate and the rate of expansion of fronds of Lemna minor grown on a culture medium with I 3 per cent sucrose and 3 × 10 ‐6 M kinetin is much enhanced by a daily 3 min exposure to red light. Far‐red, given within 3 hr of the red illumination, counteracts the action of the red light. If the interval between the red irradiation and the exposure to far‐red is increased, a gradually smaller part of the action of red light can be counteracted by far‐red (Fig. 1). From the destruction of P 730 observed by differential spectrophotometry (1) a much more rapid decrease of the counteracting effect of far‐red after the red illumination was expected. Similar effects have been observed by De Lint et al . (2)