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Controlled Environments as an Adjunct to Field Research on Lentils (Lens culinaris). V. Cultivar Responses to Above- and Below-average Temperatures during the Reproductive Period

Published online by Cambridge University Press:  03 October 2008

R. J. Summerfield ,
F. J. Muehlbauer  and
R. W. Short
R. J. Summerfield
Affiliation:
University of Reading, Department of Agriculture, Plant Environment Laboratory, Shinfield Grange, Cutbush Lane, Shinfield, Reading, RG2 9AD, England
F. J. Muehlbauer
Affiliation:
USDA-ARS, Legume Genetics and Physiology Research, 215 Johnson Hall, Washington State University, Pullman, WA 99164, USA
R. W. Short
Affiliation:
USDA-ARS, Legume Genetics and Physiology Research, 215 Johnson Hall, Washington State University, Pullman, WA 99164, USA
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Summary

Nodulated plants of three USA cultivars of lentil (Lens culinaris) were grown in controlled environment cabinets. They were given either 20 or 80 ppm inorganic nitrogen and experienced a mean temperature of 12.3° C during the vegetative period, i.e. until 73–77 days after sowing. Factorial combinations of above- (29°/11° C) and below-average (23°/8° C) day/night temperatures were then imposed, to give four mean temperatures within the range of 16.6° to 21.1° C until reproductive maturity. Post-flowering vegetative dry-matter production and seed yields were dominated by treatment effects on the initiation and growth of branches. Warmer temperatures accelerated progress towards maturity, limited branching and restricted dry-matter production; at a mean temperature of 20° C plants were almost barren. The implications of these and previous data to lentil crop production and to the use of controlled environments in lentil breeding programmes are discussed.

Type
Research Article
Information
Experimental Agriculture , Volume 25 , Issue 3 , July 1989 , pp. 327 - 341
Copyright
Copyright © Cambridge University Press 1989

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References

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