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Effect of light during regeneration from leaves of Polytrichum juniperinum
Author(s) -
Gay Lucien
Publication year - 1984
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1984.tb06106.x
Subject(s) - protonema , phytochrome , white light , botany , photosynthesis , biology , red light , physics , moss , optics
The complete regeneration of protonema from leaves of Polytrichum juniperinum Willd. is primarily related to the trophic effect of continuous white light but can be fulfilled with low irradiance (0.6 W −2 ) or with short photoperiods (6 h per day). Provided the threshold level (3.6 W −2 during 12 h) is applied, white light also acts as an inductive stimulus independent of photosynthesis around the 24th hour of culture. During this stimulation by light, RNA synthesis and then protein synthesis are required but DNA synthesis is not. The effect of light may be related to phytochrome.