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Growth cabinet studies into cold-tolerance of Festuca arundinacea populations*: I. Effects of low temperature and defoliation

Published online by Cambridge University Press:  27 March 2009

W. D. Thomas  and
Alec Lazenby
W. D. Thomas
Affiliation:
Gezira Research Station, Wad Medani, Sudan
Alec Lazenby
Affiliation:
Department of Agronomy, University of New England, Armidale, N.S.W.
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Summary

The survival of potted plants of the North African Festuca arundinacea populations syn. 1 and syn. 2 was compared to that of the British cultivar S. 170 following 18 h periods in a growth cabinet at 24 °F, 21 °F and 18 °F. No plants in any of the three populations were killed by the 24 °F or 21 °F treatments but, following the 18 °F treatment, survival of both synthetics was greatly reduced, especially amongst plants that had been cut back to 1 in. (2·5 cm) 6 days prior to the cold treatment. Reduction in tillering and deaths in syn. 1 were both greater than in syn. 2. Both cut and uncut plants of S. 170 survived the 18 °F treatment, their tillering being relatively little affected.

In a subsequent study, survival of syn. 1 and syn. 2 at temperatures decreasing to 16 °F was less amongst plants cut back to soil level than amongst those cut back to 3 in (7·5 cm) or left uncut. No differences were detectable between survival in the two synthetics, nor was there any significant effect, on such survival, of time interval prior to the cold shock.

The results showed close agreement with previous patterns of winter survival of these populations in the field.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 70 , Issue 3 , June 1968 , pp. 339 - 345
Copyright
Copyright © Cambridge University Press 1968

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