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Gradient in the degree of Crassulacean acid metabolism within leaves ofKalanchoe daigremontiana

✍ Scribed by Klaus Winter

Publisher: Springer-Verlag
Year: 1987
Tongue: English
Weight: 223 KB
Volume: 172
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00403032

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✦ Synopsis

Leaves of the Crassulacean acid metabolism plant Kalanchoe daigremontiana Hamet et Perr., about 3.3 mm thick, showed higher rates of net CO2 exchange through the lower than through the upper surface during day and night, although the lower surface received only a small fraction of the light which was incident on the upper surface. Nocturnal acidification was more pronounced in cells from the lower than from the upper portion of leaves. The lower activity of the exposed side of these long-lived succulent leaves may be related to the potentially adverse effects of excessive light.

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