Crassulacean acid metabolism in Kalancho� species collected in various climatic zones of Madagascar: a survey by ?13C analysis

Autor: Joseph Lipp, Hubert Ziegler, Manfred Kluge, Jeanne Brulfert, Didier Ravelomanana
Rok vydání: 1991
Předmět:
Zdroj: Oecologia. 88:407-414
ISSN: 1432-1939
0029-8549
Popis: The carbon isotope compositions of samples of Kalanchoe species collected at the natural stands in Madagascar were determined. The results suggest that all species of the genus Kalanchoe are capable of crassulacean acid metabolism. The observed δ13C values cover the whole range from −10 to −30‰. This high diversity of the δ13C values was found among the species of the genus as well as, in certain cases, within a single species. This suggest that the CAM patterns in Kalanchoe are generally very flexible. The δ13C values show a clear correlation with the climate of the habitats from where the samples derived. Values indicative of CO2 fixation taking place exclusively during the night were found in the dry regions of Madagascar, whereas δ13C values indicative of mixed CO2 fixation during night and day or of CO2 fixation entirely during the day are distributed in the humid zones.
Databáze: OpenAIRE
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