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Timing of the initial action of phytochrome with regard to protochlorophyll synthesis in the mustard seedling

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Summary

Significant accumulation of photoconvertible protochlorophyll(ide) in the cotyledons of the mustard seedling takes place from 24 h after sowing onwards (25° C). The rate of accumulation in darkness is greatly increased by a pretreatment with red or far-red light. The strong effect of continuous red light, given from the time of sowing, remains fully reversible by a 756 nm-light pulse up to about 18 h after sowing. On the other hand, the effect of continuous far-red light which can be detected at 15 h after sowing is not influenced by a subsequent application of 756 nm-light pulses. An interpretation of the data requires the concept that continuous red light and continuous far-red light act from different sites. This conclusion is based on a comparison of the present data with the earlier published data on phytochromemediated anthocyanin synthesis in the mustard seedling cotyledons.

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Abbreviations

PChl:

protochlorophyll(ide)

Chl:

chlorophyll(ide)

Ptr :

far-red absorbing form of the phytochrome system (physiologically active)

Pr :

red absorbing form of the phytochrome system

[Ptot]:

[Pr]+[Pfr]

References

  1. Drumm, H., Mohr, H.: The dose response curve in phytochromemediated anthocyanin synthesis in the mustard seedling. Photochem. Photobiol. 20, 151–157 (1974)

  2. Hartmann, K.M.: A general hypothesis to interpret “high energy phenomena” of photomorphogenesis on the basis of phytochrome. Photochem. Photobiol. 5, 349–366 (1966)

  3. Jabben, M., Masoner, M., Kasemir, H., Mohr, H.: Phytochromestimulated regeneration of protochlorophyll in cotyledons of the mustard seedling. Photochem. Photobiol. 20, 233–239 (1974)

  4. Jabben, M., Mohr, H.: Stimulation of the Shibata shift by phytochrome in the cotyledons of the mustard seedling Sinapis alba L. Photochem. Photobiol. 22, 55–58 (1975)

  5. Kasemir, H., Mohr, H.: Die Wirkung von Phytochrom und Actinomycin D auf die Chlorophyll a-Synthese von Senfkeimlingen (Sinapis alba L.). Planta (Berl.) 72, 187–197 (1967)

  6. Kasemir, H., Oberdorfer, U., Mohr, H.: A twofold action of phytochrome in controlling chlorophyll a accumulation. Photochem. Photobiol. 18, 481–486 (1973)

  7. Mohr, H., Schoser, G.: Eine Interferenzfilter-Monochromatoranlage für photobiologische Zwecke Planta (Berl.) 53, 1–17 (1959)

  8. Mohr, H., Meyer, U., Hartmann, K.: Die beeinflussung der Farnsporen-Keimung Osmunda Cinnamonea (L.) und O. claytoniana (L.) über das Phytochromsystem und die Photosynthese. Planta (Berl.) 60, 483–496 (1964)

  9. Mohr, H.: The control of plant growth and development by light. Biol. Rev. 39, 87–112 (1964)

  10. Mohr, H.: Untersuchungen zur phytochrominduzierten Photomorphogenese des Senfkeimlings (Sinapis alba L.). Z. Pflanzenphysiol. 54, 63–83 (1966)

  11. Mohr, H.: The role of phytochrome in controlling enzyme levels in plants. In: MTP International Reviews of Science. Biochemistry Series One. Biochemistry of cell differentiation, Vol. 9, pp. 37–81. Ed.: Paul, J., London: Butterworths 1974

  12. Oelze-Karow, H., Mohr, H.: Quantitative correlation between spectrophotometric phytochrome assay and physiological response. Photochem. Photobiol. 18, 319–330 (1973)

  13. Schäfer, E., Schmidt, W., Mohr, H.: Comparative measurements of phytochrome in cotyledons and hypocotyl hook of mustard (Sinapis alba L.). Photochem. Photobiol. 18, 331–334 (1973)

  14. Schäfer, E.: A new approach to explain the high irradiance response of photomorphogenesis on the basis of phytochrome. J. Math. Biol. 2, 41–56 (1975)

  15. Schäfer, E., Lassig, T.U., Schopfer, P.: Photocontrol of phytochrome destruction in grass seedlings. The influence of wavelength and irradiance. Photochem. Photobiol. 22, 193–202 (1975)

  16. Steinitz, B., Drumm, H., Mohr, H.: The appearance of competence for phytochrome-mediated anthocyanin synthesis on the cotyledons of Sinapis alba L. Planta (Berl.) 130, 23–31 (1976)

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Supported by a grant from the Deutsche Forschungsgemeinschaft (SFB 46).

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Kasemir, H., Huber, P. & Mohr, H. Timing of the initial action of phytochrome with regard to protochlorophyll synthesis in the mustard seedling. Planta 132, 157–160 (1976). https://doi.org/10.1007/BF00388897

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Keywords

  • Initial Action
  • Significant Accumulation
  • Subsequent Application
  • Anthocyanin Synthesis
  • Mustard Seedling