title: Action spectra for the light inhibition of flowering and its reversal inLemna paucicostata T-101.
abstract: Lemna paucicostata Hegelm. T-101, a short-day plant, flowers when plants preirradiated with red light (R) for 24 h are subjected to inductive darkness for 72 h followed by two short-day cycles (6 h R+ 18 h dark). However, flowering is inhibited by blue-or far-red-light pulses applied at the beginning of the inductive dark period. These inhibitory light effects are fully reversible by a R pulse. The action spectra for the inhibitory light effect and for its reversal show that the light pulses act exclusively through phytochrome. It is concluded that a low level of Pfr at the beginning of the inductive dark period prevents flowering.
authors.affiliation: Institute for Agricultural Research, Tohoku University, Katahira, 980, Sendai, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ohtani
authors.forename: T
authors.initials: T
authors.lastname: Kumagai