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The responses of Briza media and Koeleria manrantha to drought and re-watering.

Milnes, K. J. and Davies, W. J. and Rodwell, J. S. and Francis, Brian J. (1998) The responses of Briza media and Koeleria manrantha to drought and re-watering. Functional Ecology, 12 (4). pp. 665-672. ISSN 0269-8463

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Abstract

1. To test whether differences in response to drought can help to explain the differing distributions of Briza media and Koeleria macrantha, changes in their leaf growth and water relations during soil drying were measured. After droughting, plants were re-watered and recovery recorded. 2. Leaf growth of the two species showed a similar sensitivity to drought with respect to duration of soil drying and soil moisture content. 3. In both species tiller base relative water content (RWC) was maintained at similar levels to controls until soil moisture content had fallen to less than 9%. This may aid survival in habitats subject to periodic droughting by preventing damage to the meristems. 4. Briza media did not respond to re-watering. However, plants of K. macrantha re-grew after periods of over 20 days of drought, when tiller base RWCs had fallen as low as 13%. This ability to resurrect may explain the occurrence of K. macrantha in xeric calcicolous grasslands subject to episodes of severe droughting, from which B. media is absent.

Item Type: Article
Journal or Publication Title: Functional Ecology
Uncontrolled Keywords: Distribution • leaf growth • recovery from drought • water relations
Subjects: Q Science > QA Mathematics
Departments: Faculty of Science and Technology > Lancaster Environment Centre
Faculty of Science and Technology > Mathematics and Statistics
ID Code: 19705
Deposited By: ep_ss_importer
Deposited On: 10 Nov 2008 10:19
Refereed?: Yes
Published?: Published
Last Modified: 09 Oct 2013 15:15
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/19705

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