The loss of phytochrome photoreversibility in vitro |
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Authors: | L. R. Fox |
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Affiliation: | (1) Department of Biological Science, Florida State University, 32306 Tallahassee, FL, USA |
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Abstract: | Killer, a substance extracted from stem tissue of etiolated pea seedlings (Pisum sativum L. v. Alaska), interacts specifically with the far-red-absorbing form of phytochrome (Pfr) in vitro in a temperature-independent, rapid, stoichiometric fashion to cause a loss of phytochrome photoreversibility. The chromatographic, solubility, and spectral properties of partially purified fractions indicate that Killer is a cyclic, unsaturated molecule containing ionizible hydroxyl groups; its molecular weight is unknown, although probably low. Possible mechanisms by which the Killer-phytochrome interaction results in the loss of photoreversibility are discussed.I=Fox, 1975 |
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Keywords: | Killer Phytochrome Pisum |
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