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Development and Germination of Barnyardgrass (Echinochloa crus-galli) Seeds

Published online by Cambridge University Press:  12 June 2017

Shi-Jean S. Sung ,
Gerald R. Leather  and
Maynard G. Hale
Shi-Jean S. Sung
Affiliation:
Virginia Polytech. Inst. & State Univ., Blacksburg, VA 24061
Gerald R. Leather
Affiliation:
USDA-ARS, Foreign Disease-Weed Sci. Res., Bldg. 1301, Ft. Detrick, Frederick, MD 21701
Maynard G. Hale
Affiliation:
Virginia Polytech. Inst. & State Univ., Blacksburg, VA 24061
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Abstract

Barnyardgrass [Echinochloa crus-galli (L.) Beauv. # ECHCG] spikelets were collected from greenhouse-grown plants at various developmental stages. Caryopses contained in a single spikelet were dormant at maturity, but dormancy was overcome when the spikelets were dry afterripened at 23 C or were treated with high temperatures, acid scarification, or punctured with a scalpel. The season at which anthesis occurred affected the length of time for afterripening. Enhanced germination due to puncturing and scarification was not related to removal of a restriction to water entry. The effectiveness of puncturing in overcoming dormancy depended on moisture content of the spikelets at the time of puncturing. Above 18% moisture content germination percentage was low regardless of the dormancy-releasing treatment.

Keywords

Seed maturationEchinochloa crus-galliECHCG
Type
Weed Biology and Ecology
Information
Weed Science , Volume 35 , Issue 2 , March 1987 , pp. 211 - 215
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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