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The Wounding Response of Dormant Barnyardgrass (Echinochloa crus-galli) Seeds

Published online by Cambridge University Press:  12 June 2017

Gerald R. Leather ,
Shi-Jean Sung  and
Maynard G. Hale
Gerald R. Leather
Affiliation:
U.S. Dep. Agric. Foreign Disease-Weed Sci. Res., Ft. Detrick, Bldg. 1301, Frederick, MD 21702
Shi-Jean Sung
Affiliation:
U.S. Dep. Agric. Foreign Disease-Weed Sci. Res., Ft. Detrick, Bldg. 1301, Frederick, MD 21702
Maynard G. Hale
Affiliation:
U.S. Dep. Agric. Foreign Disease-Weed Sci. Res., Ft. Detrick, Bldg. 1301, Frederick, MD 21702
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Abstract

Induction of germination in dormant barnyardgrass seeds by wounding was investigated. Previous research indicated that a volatile compound was emitted during imbibition of wounded caryopses. When wounded caryopses were submerged in agar, total germination and speed of germination were stimulated, and the stimulation was dependent upon the concentration of agar. A twofold increase in germination occurred in 1% agar versus water, and a fivefold increase with caryopses placed in 5% agar. When wounded caryopses were imbibed, there was a fourfold increase in respiration over that of intact caryopses after 1 h. This increased rate of respiration of wounded caryopses continued for 7 h, while there was a gradual increase in respiration of intact caryopses. Carbon dioxide induced intact dormant caryopses to germinate but was not effective in stimulating germination of the seed (spikelet). High levels of abscisic acid found in the hulls of dormant seeds may have prevented the action of carbon dioxide. These results suggest that increased respiration resulting from wounding provides elevated levels of carbon dioxide in the microenvironment of the seed, thus stimulating germination. Removal of the hulls is necessary for germination even in high levels of carbon dioxide.

Keywords

BarnyardgrassEchinochloa crus-galli (L.) Beauv. #3 ECHCGCarbon dioxidegerminationabscisic acidrespirationECHCG
Type
Weed Biology and Ecology
Information
Weed Science , Volume 40 , Issue 2 , June 1992 , pp. 200 - 203
Copyright
Copyright © 1992 by the Weed Science Society of America 

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References

Literature Cited

1. Abeles, F. B. 1973. Ethylene in Plant Biology. Academic Press, New York.Google Scholar
2. Egley, G. H. and Duke, S. O. 1985. Physiology of weed seed dormancy and germination. Pages 27–64 in Duke, S. O., ed. Weed Physiology. Vol. 1. Reproduction and Ecophysiology. CRC Press, Boca Raton, FL.Google Scholar
3. Hsiao, A. I., McIntyre, G. I., and Hanes, J. A. 1983. Seed dormancy in Avena fatua. I. Induction of germination by mechanical injury. Bot. Gaz. 144:217–222.CrossRefGoogle Scholar
4. Jones, J. F. and Hall, M A. 1979. Studies on the requirement for carbon dioxide and ethylene for germination of Sperqula arvensis seeds. Plant Sci. Lett. 16:87–93.Google Scholar
5. Kahl, G. 1978. The Biochemistry of Wounded Plant Tissues. de Gruyter, Berlin.Google Scholar
6. Kennedy, R. A., Barrett, S.C.H., VanderZee, D., and Rumpho, M. E. 1980. Germination and seedling growth under anaerobic conditions in Echinochloa crus-galli (barnyardgrass). Plant Cell Environ. 3:243–248.Google Scholar
7. Koller, D. and Hadas, A. 1982. Water relations in the germination of seeds. Pages 401–433 in Lange, L., Nobel, P. S., Osmond, C. B., and Ziegler, H., eds. Physiological Plant Ecology II. Springer-Verlag. Berlin, Heidelberg.Google Scholar
8. Leather, G. R. 1987. The seed germination process. Pages 1–4 in Frasier, G. H. and Evans, R. A., eds. Seed and Seedbed Ecology of Rangeland Plants. Proc. Symp., USDA-ARS, June 1987.Google Scholar
9. McIntyre, G. I. and Hsiao, A. I. 1985. Seed dormancy in Avena fatua. II. Evidence of embryo water content as a limiting factor. Bot. Gaz. 146:347–352.Google Scholar
10. Schopfer, P. and Plachy, C. 1984. Control of seed germination by abscisic acid. II. Effect on embryo water uptake in Brassica napus L. Plant Physiol. 76:155–160.Google Scholar
11. Schopfer, P. and Plachy, C. 1985. Control of seed germination by abscisic acid. III. Effect of embryo growth potential (minimum turgor pressure) and growth coefficient (cell wall extensibility) in Brassica napus L. Plant Physiol. 77:676–686.Google Scholar
12. Sung, S. S., Leather, G. R., and Hale, M. G. 1984. Agar increases barnyardgrass [Echinochloa crus-galli (L.) Beauv.] seed germination. Weed Sci. Soc. Am. Abstr. No. 164. Page 63.Google Scholar
13. Sung, S-J. S., Leather, G. R., and Hale, M. G. 1987. Development and germination of barnyardgrass (Echinochloa crus-galli) seeds. Weed Sci. 35:211–215.CrossRefGoogle Scholar
14. Sung, S-J. S., Leather, G. R., and Hale, M. G. 1987. Induction of germination in dormant barnyardgrass (Echinochloa crus-galli) seeds by wounding. Weed Sci. 35:753–757.Google Scholar
15. Thompson, L. K., Leather, G. R., and Hale, M. G. 1984. Abscisic acid and sucrose control of velvetleaf (Abutilon theophrasti) ovule development in vitro. Weed Sci. 32:798–801.Google Scholar
16. Timson, J. 1965. New method of recording germination data. Nature 207:216–217.CrossRefGoogle Scholar
17. Yang, S. F. and Pratt, H. K. 1978. The physiology of ethylene in wounded plant tissues. Pages 595–622 in Kahl, G., ed. Biochemistry of Wounded Plant Tissues. de Gruyter, Berlin.Google Scholar