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Induction of Germination in Dormant Barnyardgrass (Echinochloa crus-galli) Seeds by Wounding

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 Polytechnic Inst. & State Univ., Blacksburg, VA 24061
Gerald R. Leather
Affiliation:
Foreign Disease – Weed Sci. Res., Agric. Res. Serv., U.S. Dep. Agric., Bldg. 1301, Ft. Detrick, Frederick, MD 21701
Maynard G. Hale
Affiliation:
Virginia Polytechnic Inst. & State Univ., Blacksburg, VA 24061
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Abstract

Various surgical cuts were used to induce germination of dormant barnyardgrass [Echinochloa crus-galli (L.) Beauv. # ECHCG] caryopses. Greater percentages of germination were obtained when the cuts were made closer to the embryo. However, removal of only the caryopsis coat covering the coleoptile or midembryo axis induced up to 10% germination compared to 70% germination for caryopses with the coat covering the radicle removed. Dormancy of barnyardgrass was not caused by the inability of the embryo to imbibe, imposed mechanical resistance of the caryopsis coat, or presence of an inhibitor. A wounding response, other than ethylene production, by the cut caryopses was possibly responsible for stimulating germination. Similar responses to cutting observed in afterripened caryopses were consistent with the suggested hypothesis.

Keywords

Echinochloa crus-galliECHCG
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 35 , Issue 6 , November 1987 , pp. 753 - 757
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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