Crassulaceen-Säurestoffwechsel (CAM) bei mitteleuropäischen Sukkulenten: Ökologische Untersuchungen an Sempervivum-Arten1)1)Herrn Professor Dr. O. Stocker zum 90. Geburtstag gewidmet.
1979; Elsevier BV; Volume: 168; Issue: 1-2 Linguagem: Inglês
10.1016/s0367-2530(17)31905-9
ISSN1618-0585
AutoresMarianne Schuber, Manfred Kluge,
Tópico(s)Plant responses to elevated CO2
ResumoCO2 exchange and diurnal rhythms of organic acids were measured in situ in some species of Sempervivum growing at the Botanical Garden of Technische Hochschule Darmstadt. The plants showed δ13 C values in the range of -15‰ indicative of CAM. This finding was reconfirmed by the gas exchange pattern and the diurnal rhythm of malic acid. In all species investigated dark CO2 fixation contributed substantially to the overall carbon gain of the plants. The gas exchange patterns were clearly temperature dependent. With high temperatures during the day, even in full sunlight net CO2 output may occur.
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