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Secondary Dormancy, Growth-Regulator Effects, and Embryo Growth Potential in Curly Dock (Rumex crispus) Seeds

Published online by Cambridge University Press:  12 June 2017

Cyrus Samimy  and
Anwar A. Khan
Cyrus Samimy
Affiliation:
Dep. Seed and Veg. Sci., Cornell Univ., Geneva, NY 14456
Anwar A. Khan
Affiliation:
Dep. Seed and Veg. Sci., Cornell Univ., Geneva, NY 14456
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Abstract

Curly dock (Rumex crispus L.) seeds failed to germinate in the dark, but germinated readily in light at 15, 20, and 25C. A secondary dormancy was induced in these seeds by 6 days of dark or light incubation at 30C (thermodormancy), by 6 days of dark incubation at 15C, or by a prolonged soaking in −15.7 bar polyethylene glycol-6000 (PEG) solution at 15C in light. The secondary dormancy induced at 15C was partially removed by 2-chloroethylphosphonic acid (ethephon) in presence of light; however, when the dormancy was induced at 30C, an addition of gibberellin A4+7 (GA4+7) to ethephon was necessary for effective removal of the dormancy. The ability of growth regulators to remove the secondary dormancy induced by prolonged dark incubation at 15C decreased progressively in light as the duration of dark incubation increased. The water-potential studies indicate that the thermodormancy can be attributed, at least in part, to the inability of the embryonic cells to lower their water potential to a level sufficient to cause radicle protrusion.

Keywords

Water potential (seeds)seed germinationethephonGA4+7
Type
Research Article
Information
Weed Science , Volume 31 , Issue 2 , March 1983 , pp. 153 - 158
Copyright
Copyright © 1983 Weed Science Society of America 

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References

Literature Cited

1. Bewley, J. D. 1980. Secondary dormancy (skotodormancy) in seeds of lettuce (Lactuca sativa cv. Grand Rapids) and its release by light, gibberellic acid and benzyladenine. Physiol. Plant. 49:277–280.CrossRefGoogle Scholar
2. Braun, J. W. and Khan, A. A. 1976. Alleviation of salinity and high temperature stress by plant growth regulators permeated into lettuce seeds via acetone. J. Am. Soc. Hortic. Sci. 101:716–721.CrossRefGoogle Scholar
3. Carpita, N. C., Nabors, M. W., Ross, C. W., and Petretic, N. L. 1979. The growth physics and water relations of red-light-induced germination in lettuce seeds. III. Changes in the osmotic and pressure potential in the embryonic axes of red- and far-red-treated seeds. Planta 144:217–224.Google Scholar
4. Carpita, N. C., Nabors, M. W., Ross, C. W., and Petretic, N. L. 1979. The growth physics and water relations of red-light-induced germination in lettuce seeds. IV. Biochemical changes in the embryonic axes of red- and far-red-treated seeds. Planta 144:225–233.CrossRefGoogle ScholarPubMed
5. Carpita, N. C., Ross, C. W., and Nabors, M. W. 1979. The influence of plant growth regulators on the growth of the embryonic axes of red- and far-red-treated lettuce seeds. Planta 145:511–516.Google Scholar
6. Duke, S. O. 1978. Interaction of seed water content with phytochrome initiated germination of Rumex crispus (L.) seeds. Plant Cell Physiol. 19:1043–1049.Google Scholar
7. Dunlap, J. R. and Morgan, P. W. 1977. Reversal of induced dormancy in lettuce by ethylene, kinetin and gibberellic acid. Plant Physiol. 60:222–224.Google Scholar
8. Hendricks, S. B. and Taylorson, R. B. 1978. Dependence of phytochrome action in seeds on membrane organization. Plant Physiol. 61:17–19.CrossRefGoogle ScholarPubMed
9. Hendricks, S. B. and Taylorson, R. B. 1979. Dependence of thermal responses of seeds on membrane transitions. Proc. Natl. Acad. Sci. USA. 76:778–781.Google Scholar
10. Khan, A. A. 1980. Hormonal regulation of primary and secondary seed dormancy. Isr. J. Bot. 29:207–224.Google Scholar
11. Khan, A. A. and Karssen, C. M. 1980. Induction of secondary dormancy in Chenopodium bonus-henricus L. seeds by osmotic and high temperature treatments and its prevention by light and growth regulators. Plant Physiol. 66:175–181.Google Scholar
12. Loercher, L. 1974. Persistence of red light induction in lettuce seeds of varying hydration. Plant Physiol. 53:503–506.CrossRefGoogle ScholarPubMed
13. Michel, B. E. and Kaufmann, M. R. 1973. The osmotic potential of polyethylene glycol 6000. Plant Physiol. 53:914–916.Google Scholar
14. Nabors, M. W. and Lang, A. 1971. The growth physics and water relations of red-light-induced germination in lettuce seeds. I. Embryos germinating in osmoticum. Planta 101:1–25.Google Scholar
15. Roberts, E. H. and Totterdell, S. 1981. Seed dormancy in Rumex species in response to environmental factors. Plant Cell Environ. 4:97–106.Google Scholar
16. Speer, H. L., Hsiao, A. I., and Vidaver, W. 1974. Effects of germination-promoting substances given in conjunction with red light on the phytochrome-mediated germination of dormant lettuce seeds (Lactuca sativa L.). Plant Physiol. 54:852–854.Google Scholar
17. Taylorson, R. B. and Hendricks, S. B. 1973. Phytochrome transformation and action in seeds of Rumex crispus L. during secondary dormancy. Plant Physiol. 52:475–479.Google Scholar
18. Thomas, T. H., Palevitch, D., Biddington, N. L., and Austin, R. B. 1975. Growth regulators and phytochrome-mediated dormancy of celery seeds. Physiol. Plant. 35:101–106.CrossRefGoogle Scholar
19. Totterdell, S. and Roberts, E. H. 1979. Effect of low temperatures on the loss of innate dormancy and development of induced dormancy in seeds of Rumex obtusifolius L. and Rumex crispus L. Plant Cell Environ. 2:131–137.Google Scholar
20. Vidaver, W. and Hsiao, A. I. 1975. Secondary dormancy in light-sensitive lettuce seeds induced anaerobically or at elevated temperature. Can. J. Bot. 53:2557–2560.Google Scholar