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Lack of influence of low temperature light and growth substances on phytochrome resynthesis in coleoptiles of irradiated oat avena sativa seedlings


Lack of influence of low temperature light and growth substances on phytochrome resynthesis in coleoptiles of irradiated oat avena sativa seedlings



Acta Societatis Botanicorum Poloniae 53(2): 271-278



ISSN/ISBN: 0001-6977

The photoconversion of phytochrome PR [red light absorbing form] into the PFR [far-red light absorbing form] causes at the same time the destruction of the initial large fraction of phytochrome found in the coleoptiles of etiolated oat seedlings. Factors such as low temperature, light of different wavelengths or growth substances are not capable of preventing the progressive destruction and restoring the synthesis of phytochrome. An abnormally high level of phytochrome is found only in etiolated seedlings. Such seedlings are characterized by a very high rate of elongation growth. The role of phytochrome in the control of deetiolation of seedlings is discussed.

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Accession: 005789946

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