Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-26T16:28:16.140Z Has data issue: false hasContentIssue false
  • English
  • Français

Seed Dormancy in Red Rice (Oryza sativa). II. Response to Cytokinins

Published online by Cambridge University Press:  12 June 2017

Marc A. Cohn  and
Denise L. Butera
Marc A. Cohn
Affiliation:
Dep. Plant Pathol. and Crop Physiol., Louisiana Agric. Exp. Stn., Louisiana State Univ., Baton Rouge, LA 70803
Denise L. Butera
Affiliation:
Dep. Plant Pathol. and Crop Physiol., Louisiana Agric. Exp. Stn., Louisiana State Univ., Baton Rouge, LA 70803
Get access Rights & Permissions [Opens in a new window]

Abstract

Dormant, dehulled red rice (Oryza sativa L. ‘Louisiana strawhulled′) germinated 80 to 90% at 30 C upon exposure to 10-3 M kinetin (6-furfurylaminopurine), benzyladenine (6-benzylaminopurine), or isopentenyladenine [6-(3-methylbut-2-enylamino)purine] at pH 3.5. Zeatin [6-(4-hydroxy-3-methylbut-trans-2-enylamino)purine] was also active, eliciting 45% germination at 10-3 M. Adenine was inactive at concentrations as high as 10-2 M. There was little influence of light and no effect of initial pH of the medium upon cytokinin-stimulated germination. At 20 C the response to cytokinins was reduced, but germination of non-dormant seeds was not prevented. At 30 C, the germination of dehulled red rice with 10-3 M kinetin occurred rapidly, with almost 70% germination after 2 days. When dehulled seeds were incubated in water and then transferred to kinetin, percent germination decreased as the duration of water incubation increased. The loss of cytokinin response did not parallel the timecourse of imbibition. Cytokinins did not break dormancy of intact seeds. The hull appeared to limit kinetin uptake and inhibited germination even when kinetin was forced into intact seeds by vacuum infiltration. Dry-after-ripening of intact seeds at 30 C did not increase the kinetin-sensitivity of intact red rice.

Keywords

Germinationkinetinbenzyladenineisopentenyladeninezeatin
Type
Research Article
Information
Weed Science , Volume 30 , Issue 2 , March 1982 , pp. 200 - 205
Copyright
Copyright © Weed Science Society of America 

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

Literature Cited

1. Badizadegan, M. and Carlson, R. F. 1967. Effect of N6 benzyladenine on seed germination and seedling growth of apple (Malus sylvestris Mill.). Proc. Am. Soc. Hortic. Sci. 91:1–8.Google Scholar
2. Black, M. 1980/81. The role of endogenous hormones in germination and dormancy. Isr. J. Bot. 29:181–192.Google Scholar
3. Black, M., Bewley, J. D., and Fountain, D. 1974. Lettuce seed germination and cytokinins: their entry and formation. Planta 117:145–152.Google Scholar
4. Cohn, M. A. and Hughes, J. A. 1981. Seed dormancy in red rice (Oryza sativa. I. Effect of temperature on dry-afterripening. Weed Sci. 29:402–404.Google Scholar
5. Elkinawy, M. and Hemberg, T. 1974. Effect of temperature and kinetin on the germination and endogenous hormones of Hyoscyamus muticus seeds. Physiol. Plant 31:64–66.Google Scholar
6. Esashi, Y., Hata, Y, and Katoh, H. 1975. Gemination of cocklebur seeds: Interactions between gibberellic acid, benzyladenine, thiourea and gaseous factors. Aust. J. Plant Physiol. 2:569–579.Google Scholar
7. Esashi, Y., Katoh, H., and Leopold, A. C. 1977. Dormancy and impotency of cocklebur seeds. IV. Effects of gibberellic acid, benzyladenine, thiourea, and potassium nitrate on the growth of embryonic axis and cotyledon segments. Plant Physiol. 59: 117–121.Google Scholar
8. Esashi, Y, Okazaki, M., Yanai, N., and Hishinuma, K. 1978. Control of the germination of secondary dormant cocklebur seeds by various germination stimulants. Plant Cell Physiol. 19:1497–1506.Google Scholar
9. Frankland, B. 1961. Effect of gibberellic acid, kinetin and other substances on seed dormancy. Nature (London) 192:678–679.Google Scholar
10. Ketring, D. L. and Morgan, P. W. 1971. Physiology of oil seeds. II. Dormancy release in Virginia-type peanut seeds by plant growth regulators. Plant Physiol. 47:488–492.Google Scholar
11. Khan, A. A. 1966. Breaking of dormancy in Xanthium seeds by kinetin mediated by light and DNA-dependent RNA synthesis. Physiol. Plant. 19:869–874.CrossRefGoogle Scholar
12. Khan, A. A. 1968. Inhibition of gibberellic acid-induced germination by abscisic acid and reversal by cytokinins. Plant Physiol. 43:1463–1465.Google Scholar
13. Letham, D. S., Goodwin, P. B., and Higgins, T.J.V. 1978. Phytohormones and Related Compounds: A Comprehensive Treatise. Vol. 2. Elsevier/North Holland, Amsterdam. 648 pp.Google Scholar
14. Miller, C. O. 1956. Similarity of some kinetin and red light effects. Plant Physiol. 31:318–319.Google Scholar
15. Oelke, E. A. and Albrecht, K. A. 1980. Influence of chemical seed treatments on germination of dormant wild rice seeds. Crop Sci. 20:595–598.Google Scholar
16. Pinfield, N. J. and Stobart, A. K. 1972. Hormonal regulation of germination and early seedling development in Acer pseudo-platanus L. Planta 104:134–145.Google Scholar
17. Roberts, E. H. 1963. The effects of some organic growth substances and organic nutrients on dormancy in rice seed. Physiol. Plant. 16:745–755.Google Scholar
18. Skinner, C. G., Claybrook, J. R., Talbert, F., and Shive, W. 1957. Effect of 6-(substituted) thio- and amino-purines on germination of lettuce seed. Plant Physiol. 32:117–120.Google Scholar
19. Thomas, T. H. 1977. Cytokinins, cytokinin-active compounds and seed germination. Pages 111–144 in Khan, A. A., ed. The Physiology and Biochemistry of Seed Dormancy and Germination. North Holland, Amsterdam.Google Scholar
20. Tzou, D-S., Galson, E. C., and Sondheimer, E. 1973. The metabolism of hormones during seed germination and release from dormancy. Plant Physiol. 51:894–897.Google Scholar
21. Webb, D. P. and Dumbroff, E. B. 1969. Factors influencing the stratification process in seeds of Acer saccharum . Can. J. Bot. 47:1555–1563.Google Scholar
22. Wilson, B. F., Hibbs, D. E., and Fischer, B. C. 1979. Seed dormancy in striped maple. Can. J. For. Res. 9:263–266.Google Scholar
23. Windholz, M. 1976. The Merck Index, 9th ed. Merck and Co., Rahway, NJ. 696 pp.Google Scholar
24. Worsham, A. D., Moreland, D. E., and Klingman, G. C. 1959. Stimulation of Striga asiatica (witchweed) seed germination by 6-substituted purines. Science 130:1654–1656.Google Scholar