Abstract
Whilst the effect of temperature on photosynthesis is well established, the influence of growth temperature on net carbon exchange (NCE) and component processes is less well documented. In the present study the degree of temperature adaptation on plant growth in relation to NCE and photo-respiratorv activity and selected in vitro enzyme activities has been determined in Tall Fescue grown at 10° and 25°. Different optima for NCE have been shown to be related to effect of temperature on photo-respiratory and dark respiratory activity. No environmental influence on qualitative characteristics of enzymes was observed but quantitative differences in enzyme activities can explain the different pattern of temperature response. Activity of RuDPc was similar in both environments but activities of respiratory enzymes MDH and ICDH were significantly higher at 10° growth. Stomatal conductances were markedly reduced at 30° and caused a sharp decline in NCE in plants from both growth temperatures. Thus in different environmental conditions different components act as rate controlling factors.
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© 1975 Dr. W. Junk b.v., Publishers, The Hague
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Treharne, K.J., Nelson, C.J. (1975). Effect of Growth Temperature on Photosynthetic and Photo-Respiratory Activity in Tall Fescue. In: Marcelle, R. (eds) Environmental and Biological Control of Photosynthesis. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1957-6_7
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DOI: https://doi.org/10.1007/978-94-010-1957-6_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-6193-179-9
Online ISBN: 978-94-010-1957-6
eBook Packages: Springer Book Archive