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Moisture Stress and Hydration-Dehydration Effects on Hemp Sesbania (Sesbania exaltata) Seed Germination

Published online by Cambridge University Press:  12 June 2017

Robert D. Williams
Robert D. Williams*
Affiliation:
U.S. Dep. Agric., Sci. Ed. Admin., Agric. Res., Southern Plains Watershed and Water Quality Lab., 801 Wilson Street, Durant, OK 74701
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Abstract

Increased osmotic potential from 0 to −14 bars decreased the moisture uptake and germination of mechanically scarified hemp sesbania [Sesbania exaltata (Raf.) Cory] seed. Germination percentage for osmotic potential of 0, −2, −4, −6, and −8 bars was 86%, 86%, 70%, 19%, and 1%, respectively. This response to moisture stress was modified by imbibition, or hydration-dehydration, of the seed prior to the moisture stress. Imbibing the seed for as little as 2 h significantly increased its subsequent germination against moisture stress. One hydration-dehydration cycle had little or no effect on germination, but as the number of cycles increased, the germination percentage decreased. Prolonged hydration of 3 and 7 days followed by dehydration greatly reduced subsequent seed germination.

Keywords

Osmotic potentialimbibitionwater relations
Type
Research Article
Information
Weed Science , Volume 28 , Issue 5 , September 1980 , pp. 487 - 492
Copyright
Copyright © Weed Science Society of America 

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References

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