Gas transfer in floating-leaved plants |
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Authors: | W Große C Bauch |
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Institution: | (1) Botanical Institute, University of Cologne, Gyrhofstraße 15, D-5000 Köln 41, Germany |
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Abstract: | Pressurized gas transport with flow rates of 1.1 to 1.81 gas h-1 plant-1 have been detected in the floating-leaved aquatic macrophyte Euryale ferox on sunny days. The younger leaves gave the highest pressurization, but the gas flow was initiated mainly by the middle-aged leaves of the plants. The gas through-flow was shown to be highly beneficial for floating-leaved plants. It improved the oxygen level in the aerenchyma of the submerged organs of Nymphaea alba and Nymphoides peltata, and doubled the ATP level in the root tissues. On the other hand, the sulphur dioxide fumigation experiments on Nymphaea odorata indicated that the pressurized gas transport may adversely affect the floating-leaved plants, due to an increased contamination of the leaves leading to increased photo bleaching and impaired photosynthesis.Abbreviations ATP
adenosine triphosphate
- FW
fresh weight
- SO2
sulphur dioxide |
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Keywords: | Aeration Ecophysiology Energy supply Photo bleaching Photosynthesis Pollution |
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