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Photosynthetic and Respiratory Responses of Natural Populations of Koeleria cristata Grown in Three Environmental Regimes
Philip A. Robertson
Vol. 137, No. 1 (Mar., 1976), pp. 94-98
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/2473764
Page Count: 5
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The photosynthetic and respiratory responses of plants from four natural populations of Koeleria cristata preconditioned in three environmental regimes were compared. Tetraploid plants had significantly higher photosynthesis activity than diploid plants, while no significant differences in dark respiration occurred between ploidy levels. Photosynthesis significantly increased, and respiration decreased, with increasing temperature of the preconditioning regime. A time-course study of two plant groups indicated that adjustments in photosynthetic activity were occurring up to 7 days after their environment was altered.
Botanical Gazette © 1976 The University of Chicago Press