Carbon Fixation and Isotope Discrimination by a Crassulacean Plant: Dependence on the Photoperiod
- 22 March 1974
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 183 (4130), 1207-1209
- https://doi.org/10.1126/science.183.4130.1207
Abstract
Variations of more than 1 percent are observed in the carbon-13 to carbon-12 ratio of extracts of leaves of the succulent Kalanchoe blossfeldiana when the photoperiod is changed from long to short days. This indicates that the mechanism of carbon fixation switches from the Calvin (C3) pathway to the Hatch-Slack (C4) pathway of primary enzymic operation. The variations observed in the isotope compositions are tentatively explained by a model.Keywords
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