Abstract
Fluence rate-response curves were determined for the inhibition of hypocotyl growth in 54 h old dark-grownSinapis alba L. seedlings by continuous or hourly 5 min red light irradiation (24 h). In both cases a fluence rate-dependence was observed. More than 90% of the continuous light effect could be substituted for by hourly light pulses if the total fluence of the two different light regimes was the same. Measurements of the far red absorbing form of phytochrome ([P fr]) and [P fr]/[P tot] (total phytochrome) showed a strong fluence rate-dependence under continuous and pulsed light which partially paralleled the fluence rate-response curves for the inhibition of the hypocotyl growth.
Similar content being viewed by others
Abbreviations
- R:
-
red
- HIR:
-
high irradiance response
- P rfr :
-
phytochrome in its red, far-red absorbing form
- [P tot]=[P r]+[P fr]:
-
ψλ=k 1/(k 1+k 2): photoequilibrium of phytochrome at wavelength λ, wherebyk 1,2 rate constants ofP r→P fr,P fr→P r photoconversion
- Ψ:
-
[P fr]/[P tot]
References
Beggs, C.J., Holmes, M.G., Jabben, M., Schäfer, E. (1980) Action spectra for the inhibition of hypocotyl growth by continuous irradiation in light and dark grownSinapis alba L. seedlings. Plant Physiol.66, 615–618
Butler, W.L., Siegelman, H.W., Miller, C.O. (1964) De-naturation of phytochrome. Biochemistry3, 851–857
Cumming, B.G. (1967) Early flowering plants. In: Methods in developmental biology, pp. 277–299, Wilt, F.H., Wessels, N.K., eds. Thomas Y. Crowell Company, New York
Fukshansky, L., Schäfer E. (1982) Models in photomorphogenesis. In: Encyclopedia of plant physiology. N. S., vol. 9. Photomorphogenesis, Shropshire, W. Jr., Mohr, H., eds. Springer Verlag, Berlin Heidelberg New York (in press)
Gammerman, A.Y., Fukshansky, L. Ya. (1974) A mathematical model of phytochrome — the receptor of photomorphogenetic processes in plants. Ontogenez5, 108–114
Häcker, M., Hartmann, K.M., Mohr, H. (1964) Zellteilung und Zellwachstum im Hypocotyl vonLactuca sativa L. unter dem Einfluß des Lichtes. Planta63, 253–268
Hartmann, K.M. (1966) A general hypothesis to interpret “high energy phenomena” of photomorphogenesis on the basis of phytochrome. Photochem. Photobiol.5, 349–366
Holmes, M.G., Schäfer, E. (1981) Action spectra for changes in the ‘high irradiance reaction’ in hypocotyls ofSinapis alba L. Planta153, 267–272
Johnson, C.B. (1980) The effect of red light in the high irradiance reaction of phytochrome: Evidence for an interaction between Pfr and a phytochrome cycling-driven process. Plant Cell Environ.3, 45–51
Johnson, C.B., Tasker, R. (1979) A scheme to account quantitatively for the action of phytochrome in etiolated and light grown plants. Plant Cell Environ.2, 259–265
Jose, A.M., Vince-Prue, D. (1977) Action spectra for the inhibition of growth in radish hypocotyls. Planta136, 131–134
Lehmann, U., Schäfer, E. (1978) Kinetics of phytochrome pellet-ability. Photochem. Photobiol.27, 767–773
Mancinelli, A.L., Rabino, I. (1975) Photocontrol of anthocyanin synthesis. IV. Dose dependency and reciprocity relationship in anthocyanin synthesis. Plant Physiol.56, 351–355
Mancinelli, A.L., Rabino, I. (1978) The ‘high irradiance responses’ of plant photomorphogenesis. Bot. Rev.44, 129–180
Mancinelli, A.L., Walsh, L. (1979) Photocontrol of anthocyanin synthesis. VII. Factors affecting the spectral sensitivity of anthocyanin synthesis in young seedlings. Plant Physiol.63, 841–846
Marmé, D., Marchal, B., Schäfer, E. (1971) A detailed analysis of phytochrome decay and dark reversion in mustard cotyledons. Planta100, 331–336
Mohr, H. (1957) Der Einfluß monochromatischer Strahlung auf das Längenwachstum des Hypocotyls und auf die Anthocyanbildung bei Keimlingen vonSinapis alba L. (=Brassica alba Boiss.). Planta49, 389–405
Mohr, H. (1966) Untersuchungen zur phytochrom-induzierten Photomorphogenese des Senfkeimlings (Sinapis alba L.). Z. Pflanzenphysiol.54, 63–83
Pratt, L.H., Briggs, W.R. (1966) Photochemical and non photochemical reactions of phytochrome in vivo. Plant Physiol.41, 467–474
Pratt, L.H., Marmé, D. (1976) Red light enhanced phytochrome pelletability. Re-examination and further characterisation. Plant Physiol.58, 682–692
Quail, P.H., Briggs, W.R. (1978) Irradiation-enhanced phytochrome pelletability. Requirement for phosphorylative energy in vivo. Plant Physiol.62, 773–778
Schäfer, E. (1975) A new approach to explain the ‘high irradiance responses’ of photomorphogenesis on the basis of phytochrome. J. Math. Biol.2, 41–56
Schäfer, E. (1976) The ‘high irradiance reaction’. In: Light and plant development, pp. 45–59, Smith, H., ed. Butterworth, London Boston
Schäfer, E., Marchal, B., Marmé, D. (1972) In vivo measurements of the phytochrome photostationary state in far red light. Photochem. Photobiol.15, 457–464
Schäfer, E., Schmidt, W., Mohr, H. (1973) Comparative measurements of phytochrome in cotyledons and hypocotyl hook of mustard (Sinapis alba L.). Photochem. Photobiol.18, 331–334
Schäfer, E., Mohr, H. (1974) Irradiance dependency of the phytochrome system in cotyledons of mustard (Sinapis alba L.). J. Math. Biol.1, 9–15
Schäfer, E., Schmidt, W. (1974) Temperature dependence of phytochrome dark reactions. Planta116, 257–266
Schäfer, E., Mohr, H. (1980) Changes in the rates of photoconversion of phytochrome during etiolation in mustard seedlings. Photochem. Photobiol.31, 495–500
Schäfer, E., Beggs, C.J., Fukshansky, L., Holmes, M.G., Jabben, M. (1981) A comparative study of the responsitivity ofSinapis alba L. seedlings to pulsed and continuous irradiation. Planta153, 258–261
Schmidt, R., Mohr, H. (1981) Time-dependent changes in the responsiveness to light of phytochrome-mediated anthocyanin synthesis. Plant Cell Environ. (in press)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Heim, B., Schäfer, E. Light-controlled inhibition of hypocotyl growth inSinapis alba L. seedlings. Planta 154, 150–155 (1982). https://doi.org/10.1007/BF00387909
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00387909