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BLUE LIGHT IN THE DEVELOPMENT OF FERN GAMETOPHYTES AND ITS INTERACTION WITH FAR‐RED AND RED LIGHT
Author(s) -
Miller John H.,
Miller Pauline Monz
Publication year - 1964
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1964.tb06639.x
Subject(s) - blue light , elongation , far red , protein filament , red light , darkness , biology , gametophyte , irradiation , phytochrome , fern , spore , botany , biophysics , optics , biochemistry , physics , materials science , pollen , nuclear physics , metallurgy , ultimate tensile strength
Two effects of blue light on the development of Onoclea sensibilis spores are demonstrated. Brief irradiation promotes the protonemal or filamentous type of growth, and the rate of filament elongation is greater than in darkness. Longer periods of irradiation induce the formation of 2‐dimensional prothallia. Blue‐light treatments which promote filament elongation interact with elongation‐promoting far‐red light. Far‐red irradiation alone promotes filament elongation to a greater extent than blue light, but a blue‐light irradiation, either following or preceding far‐red treatment, strongly inhibits the far‐red promotion. In darkness, a slow recovery from the blue‐light‐induced loss of sensitivity to far‐red takes place. The recovery may be greatly accelerated by interposing a red‐light treatment between blue and far‐red irradiation.