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Growth, Gas Exchange, and Germination of Several Jointed Goatgrass (Aegilops cylindrica) Accessions

Published online by Cambridge University Press:  12 June 2017

David R. Gealy
David R. Gealy*
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., 215 Johnson Hall, Washington State Univ., Pullman, WA 99164
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Abstract

Growth, development, and germination among jointed goatgrass (Aegilops cylindrica Host. # AEGCY) accessions collected from nine western states were not consistently different in field plots near Pullman, WA, or in the greenhouse. Germination percentage and rate of spikelet germination of all accessions produced in the field and greenhouse were consistently high, averaging about 64% and 5.2 (on a unitless scale of 0 to 7), respectively. The Montana accession germinated consistently less than the others. In a separate greenhouse study comparing only the accessions from Colorado and Nebraska, the accession from Colorado averaged 18, 16, and 15% greater net photosynthesis rate (Pn), transpiration rate (E), and stomatal density, respectively, and 21% lower diffusive resistance (rl) than did the accession from Nebraska. However, growth parameters of the Nebraska accession averaged 7 to 35% greater than for the Colorado accession. Overall, the germination, growth, CO2 fixation, and water use among accessions appeared to be similar when jointed goatgrass was grown under Pacific Northwest conditions.

Keywords

Ecotypephotosynthesistranspirationdiffusive resistancestomataAEGCY
Type
Weed Biology and Ecology
Information
Weed Science , Volume 36 , Issue 2 , March 1988 , pp. 176 - 185
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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