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UNTERSUCHUNGEN ÜBER DEN GEFÄSS-SAFT TROPISCHER LIANEN

Fritz Gessner
Planta
64. Bd., 2. H. (1965), pp. 186-190
Published by: Springer
Stable URL: http://www.jstor.org/stable/23364931
Page Count: 5
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UNTERSUCHUNGEN ÜBER DEN GEFÄSS-SAFT TROPISCHER LIANEN
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Abstract

Investigations on the electric conductance of the vascular sap of the tropical liana Bauhinia splendens were carried out in the Amazon-rain forest. The values range between 200 and 1000 μS, the pH-values between 5.1 and 6.5. The inverse correlation between conductance and pH is due to the high mobility of the H-ion. In comparison with the soil water in the vicinity of the Bauhinia-roots the content of electrolyts of the sap is 20—100 times higher. It was not possibel to measure the oxigen content of the Bauhinia sap with the Winkler-method but in other-not identified-lianas the vascular sap was in all cases undersaturated in oxigen.

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