Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-26T07:15:57.535Z Has data issue: false hasContentIssue false
  • English
  • Français

Inhibition of germination in Amaranthus albus seeds by prolonged irradiation: a physiological basis

Published online by Cambridge University Press:  19 September 2008

R. B. Taylorson
R. B. Taylorson*
Affiliation:
USDA – ARS, Room 218, Building 004, BARC – West, Beltsville, MD 20705, USA
*
* Correspondence to current address: Department of Plant Science, University of Rhode Island, Kingston, RI 02881, USA
Get access Rights & Permissions [Opens in a new window]

Abstract

Amaranthus albus L. seeds able to germinate in darkness can be prevented from germinating by prolonged irradiation with incandescent light (CIL). The germination in darkness is controlled by pre-existent Pfr. Allowing the seeds to remain in darkness for about 16 h allows an escape from the inhibition by CIL, about comparable with the time required to escape from pre-existent Pfr control. By examining escape from low fluence far-red (FR), it was found that no escape occurred in CIL. It was concluded that the mode of action of CIL in inhibiting A. albus seed germination involved prevention of the action of the pre-existent Pfr and a subsequent dormancy which does not allow a response to the Pfr generated by the incandescent light. Other actions of CIL were found but were considered less likely as causative for the inhibition of germination. One was a direct inhibition of radicle elongation and another involved prevention of an increased responsiveness to Pfr induced by treatment at 40°C.

Keywords

Amaranthus albus L.low fluence responsegermination inhibitionhigh irradiance responseprolonged irradiationphytochrome
Type
Research Papers
Information
Seed Science Research , Volume 1 , Issue 1 , March 1991 , pp. 51 - 56
Copyright
Copyright © Cambridge University Press 1991

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

Bartley, M.R. and Frankland, B. (1982) Analysis of the dual role of phytochrome in the photoinhibition of seed germination. Nature 300, 750–752.CrossRefGoogle Scholar
Borthwick, H.A., Hendricks, S.B., Schneider, M.J., Taylorson, R.B. and Toole, V.K. (1969) The high-energy light action controlling plant responses and development. Proceedings of the National Academy of Sciences (USA) 64, 479–486.CrossRefGoogle ScholarPubMed
Chadoeuf-Hannel, R. and Taylorson, R.B. (1985a) Anesthetic stimulation of Amaranthus albus seed germination: Interaction with phytochrome. Physiologia Plantarum 65, 451–454.CrossRefGoogle Scholar
Chadoeuf-Hannel, R. and Taylorson, R.B. (1985b) Enhanced phytochrome sensitivity and its reversal in Amaranthus albus seeds. Plant Physiology 78, 228–231.CrossRefGoogle Scholar
Holmes, M.G. and Smith, H. (1975) The function of phytochrome in plants growing in the natural environment. Nature 254, 512–514.CrossRefGoogle Scholar
Kadman-Zahavi, A. (1960) Effects of short and continuous illumination on the germination of Amaranthus retroflexus seeds. Bulletin of the Research Council of Israel 9, 1–20.Google Scholar
Kendrick, R.E. and Frankland, B. (1969) Photocontrol of germination in Amaranthus caudatus. Planta 85, 326–339.CrossRefGoogle Scholar
Mancinelli, A.L. and Rabino, I. (1978) The high irradiance responses of plant morphogenesis. Botanical Reviews 44, 129–180.CrossRefGoogle Scholar
Martin, A.C. and Barkley, W.D. (1961) Seed identification manual. Berkeley. CA, USA University of California Press.CrossRefGoogle Scholar
Schonbeck, M.W. and Egley, G.H. (1988) Effects of ethylene and some other environmental factors on different stages of germination in redroot pigweed (Amaranthus retroflexus L.) seeds. Plant, Cell and Environment 11, 189–197.CrossRefGoogle Scholar
Taylorson, R.B. and Hendricks, S.B. (1972) Rehydration of phytochrome in imbibing seeds of Amaranthus retroflexus L. Plant Physiology 49, 663–665.CrossRefGoogle ScholarPubMed
VanDerWoude, W.J. (1987) Application of the dimeric model of phytochrome action to high irradiance responses. pp 249–258 in Furuya, M. (Ed.) Phytochrome and photoregulation in plants. New York, USA, Academic Press.Google Scholar
VanDerWoude, W.J. and Toole, V.K. (1980) Studies of the mechanism of enhancement of phytochrome dependent lettuce seed germination by prechilling. Plant Physiology 66, 220–224.CrossRefGoogle Scholar
Woodcock, E.F. (1931) Seed development in Amaranthus caudatusL. Papers of the Michigan Academy of Science, Arts&Letters XV, 173–180.Google Scholar