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Action of Blue Light on the Germination of Seeds


THE mutually reversible influence of red and far-red radiation on seed germination is to-day a well established fact. The role of other regions of the spectrum is less certain. Conflicting results, for example, have been reported on the action of blue light on germination (see review in ref. 2). In the present work we have investigated the effect of light in this part of the spectrum, and especially the change of this effect with time elapsed since the start of imbibition. It is known that even for red light the sensitivity of the seeds changes with the time3. The seeds used were lettuce seeds var. Grand Rapids. The methods of imbibition, counting and irradiation were as in ref. 3. Spectral bands were isolated using the following filters:

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  1. 1

    Toole, E. H., Hendricks, S. B., Borthwick, H. A., and Toole, V. K., “Ann. Rev. Plant Physiol.”, 7, 299 (1956).

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  2. 2

    Evenari, M., in “Radiation Biology”, edit. A. Hollaender, 3, 519 (McGraw-Hill, N.Y., 1956).

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  3. 3

    Evenari, M., and Neumann, G., Bull. Res. Counc. Israel, 3, 136 (1953).

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  4. 4

    Evenari, M., Neumann, G., and Stein, G., Nature, 172, 452 (1953).

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EVENARI, M., NEUMANN, G. & STEIN, G. Action of Blue Light on the Germination of Seeds. Nature 180, 609–610 (1957).

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