Hostname: page-component-7bb8b95d7b-dtkg6 Total loading time: 0 Render date: 2024-09-30T00:44:21.325Z Has data issue: false hasContentIssue false
  • English
  • Français

Very low fluence and low fluence response in the induction and inhibition of seed germination in Celosia argentea

Published online by Cambridge University Press:  19 September 2008

Sanjay Dixit  and
Dilip Amritphale
Sanjay Dixit
Affiliation:
School of Studies in Botany, Vikram University, Ujjain, (M.P.) 456 010, India
Dilip Amritphale*
Affiliation:
School of Studies in Botany, Vikram University, Ujjain, (M.P.) 456 010, India
*
*Correspondence
Get access Rights & Permissions [Opens in a new window]

Abstract

Seeds of Celosia argentea L. displayed an absolute requirement for light for germination. Germination could be induced by far-red light as well as red light, and therefore, the effect of red light was not completely reversible by far-red light. A considerable proportion of the seed population was sensitive to red light within the range 0.01–0.1 μmol m−2, which suggested that phytochrome was operating in the very low fluence response mode. Seeds showed a gradual increase in germination in response to red light with an increasing duration of previous dark imbibition. Interruption of the dark imbibition period with very low fluence (10−4−10–1 μmol m−2) or low fluence (1–103 μmol m−2) red light prevented germination subsequent to a terminal, saturating red light irradiation. Increasing responsiveness to red light with increase in imbibition temperature and inhibition of development of photosensitivity by cycloheximide suggested that phytochrome synthesis occurred during the dark imbibition period. An absolute requirement for light for seed germination, inhibition of seed germination on interrupting the dark imbibition period with very low fluence or low fluence red light, and the recovery from photoinhibition of seeds in darkness are consistent with the hypothesis that PhyA is the principal phytochrome involved in the photoregulation of seed germination in C. argentea.

Keywords

Celosia argenteadormancygerminationphytochrome
Type
Physiology and Biochemistry
Information
Seed Science Research , Volume 6 , Issue 2 , June 1996 , pp. 43 - 48
Copyright
Copyright © Cambridge University Press 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Amritphale, D., Mukhiya, Y.K., Gupta, J.C. and Iyengar, S. (1984) Effect of storage, photoperiod and mechanical scarification on seed germination in Ocimum americanum. Physiologia Plantarum 61, 649–652.CrossRefGoogle Scholar
Bewley, J.D. and Black, M. (1982) Physiology and biochemistry of seeds. 2. Viability, dormancy and environmental control. Berlin, Springer– Verlag.Google Scholar
Bradbeer, J.W. (1988) Seed dormancy and germination. London, Blackie and Son Ltd.Google Scholar
De Petter, E., Van Wiemeersch, L., Rethy, R., Dedonder, A., Fredericq, H. and De Greef, J. (1988) Fluence–response curves and action spectra for the very low fluence and the low fluence response for the induction of Kalanchoë seed germination. Plant Physiology 88, 276–283.Google Scholar
Duke, S.O., Egley, G.H. and Reger, B.J. (1977) Model for variable light sensitivity in imbibed dark–dormant seeds. Plant Physiology 59, 244–249.CrossRefGoogle ScholarPubMed
Finney, J.D. (1962) Probit analysis: A statistical treatment of the sigmoid response curve. Cambridge, Cambridge Univ. Press.Google Scholar
Isikawa, S., Fujii, T. and Yokohama, Y. (1961) Photoperiodic control of the germination of Eragrostis seeds. Botanical Magazine (Tokyo) 74, 14–18.CrossRefGoogle Scholar
ISTA (1985) International rules for seed testing. Seed Science and Technology 13, 299–513.Google Scholar
Kendrick, R.E. and Cone, J.W. (1985) Biphasic fluence response curves for induction of seed germination. Plant Physiology 79, 299–300.CrossRefGoogle ScholarPubMed
Kendrick, R.E., Spruit, C.J.P. and Frankland, B. (1969) Phytochrome in seeds of Amaranthus caudatus. Planta 88, 293–302.Google ScholarPubMed
Konomi, K., Abe, H. and Furuya, M. (1987) Changes in the content of phytochrome I and II apoproteins in embryonic axes of pea seeds during imbibition. Plant and Cell Physiology 28, 1443–1451.Google Scholar
Rethy, R., Dedonder, A., De Petter, E., Van Wiemeersch, L., Fredericq, H., De Greef, J., Steyaert, H. and Stevens, H. (1987) Biphasic fluence-response curves for phytochrome-mediated Kalanchoë seed germination. Sensitization by gibberellic acid. Plant Physiology 83, 126–130.Google Scholar
Sharma, N.K. and Amritphale, D. (1988) Effect of moisture stress and basalin on germination and root length of three weeds of soybean. Indian Journal of Plant Physiology 31, 440–443.Google Scholar
Sharrock, R.A. and Quail, P.H. (1989) Novel phytochrome sequences in Arabidopsis thaliana: structure, evolution, and differential expression of a plant regulatory photoreceptor family. Genes and Development 3, 1745–1757.Google Scholar
Shinomura, T., Nagatani, A., Chory, J. and Furuya, M. (1994) The induction of seed germination in Arabidopsis thaliana is regulated principally by phytochrome B and secondarily by phytochrome A. Plant Physiology 104, 363–371.Google Scholar
Smith, H., Whitelam, G.C. and McCormac, A.C. (1991) Do the members of the phytochrome family have different roles ? Physiological evidence from wild-type, mutant and transgenic tomato plants, pp 217–236 in Thomas, B., Johnson, C.B., (Eds) Phytochrome properties and biological action. NATO Advanced Research Workshop, Chichester, UK. NATO ASI Series: Series H: Cell biology Vol.50. Berlin, Springer-Verlag.Google Scholar
Sokol, R.C. and Stross, R.G. (1992) Phytochrome-mediated germination of very sensitive oospores. Plant Physiology 100, 1132–1136.CrossRefGoogle ScholarPubMed
Taylorson, R.B. (1982) Interaction of phytochrome and other factors in seed germination. pp 323–346in Khan, A.A., (Ed.) The physiology and biochemistry of seed development, dormancy and germination. Amsterdam, New York, Elsevier Biomedical Press.Google Scholar
Taylorson, R.B. and Hendricks, S.B. (1971) Changes in phytochrome expressed by germination of Amaranthus retroflexus L. seeds. Plant Physiology 47, 619–622.Google Scholar
Toole, V.K. and Borthwick, H.A. (1968) Light response of Eragrostis curvula seeds. Proceedings of International Seed Testing Association 33, 515–530.Google Scholar
Vierstra, R.D. (1993) Illuminating phytochrome functions: there is light at the end of the tunnel. Plant Physiology 103, 679–684.Google Scholar