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The loss of phytochrome photoreversibility in vitro

II. Properties of killer and its reaction with phytochrome

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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.

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  1. Department of Biological Science, Florida State University, 32306, Tallahassee, FL, USA

    L. R. Fox

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  1. L. R. Fox
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Fox, L.R. The loss of phytochrome photoreversibility in vitro. Planta 135, 217–223 (1977). https://doi.org/10.1007/BF00384893

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  • DOI: https://doi.org/10.1007/BF00384893

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