An in vivo study of phytochrome in seeds of Pinus nigra Arn by differential spectrophotometry

Phytochrome photoconversions Pr→Pfr and Pfr→Pr can be measured by differential spectrophotometry in "dry" seeds (6% water content) of Pinus nigra Arn. A red light irradiation given before imbibition induces germination when the seeds are subsequently wetted and kept in darkness.In continuo...

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Bibliographic Details
Published in:Planta 1972-12, Vol.105 (4), p.310
Main Authors: Orlandini, M, Malcoste, R
Format: Article
Language:fre
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Summary:Phytochrome photoconversions Pr→Pfr and Pfr→Pr can be measured by differential spectrophotometry in "dry" seeds (6% water content) of Pinus nigra Arn. A red light irradiation given before imbibition induces germination when the seeds are subsequently wetted and kept in darkness.In continuous darkness the phytochrome content shows a drastic increase at the beginning of moistening.The detectable pigment is entirely in the Pr form. The normal Pfr→Pr dark reversion is observed. Pfr destruction does not take place.
ISSN:0032-0935