Influence of salinity and high temperature on turion formation in the duckweed Spirodela polyrhiza |
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| Authors: | Katja KuehdorfKlaus-J. Appenroth |
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| Affiliation: | University of Jena, Institute of Plant Physiology, Dornburger Str. 159, 07743 Jena, Germany |
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| Abstract: | The influence of NaCl (salinity; 0-5 ‰) and higher temperature (heat stress; 32 °C) on yield of turion formation has been tested in the duckweed Spirodela polyrhiza for the first time. Turion formation was more sensitive to both stressors than the growth of the vegetative fronds: (1) the concentration of NaCl which produces half-maximal inhibition was lower for turion formation than for growth by the factor of five. (2) At 32 °C turion formation was completely blocked whereas growth rates decreased by only 20% as compared with 28 °C. |
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| Keywords: | EC50, half-maximal effective concentration of inhibition RGR, relative growth rate SY, specific turion yield |
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