Effects of light and temperature on sporangiophore initiation in Pilobolus crystallinus (Wiggers) Tode |
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Authors: | H Kubo H Mihara |
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Institution: | (1) Laboratory of Applied Botany, Faculty of Agriculture, Kyoto University, 606 Kyoto, Japan |
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Abstract: | Sporangiophore initiation in Pilobolus crystallinus grown in white light was induced by either a dark or a low-temperature treatment. The period of darkness necessary to induce sporangiophore initiation was shortened by lowering the temperature. Arrhenius plots for the sporangiophore-suppressing reaction in both light and darkness consisted of two straight lines with a Q10 of about 2 at lower temperatures and 8–11 at higher temperatures. The temperature at which the Q10 changed was the lower, the higher the fluence rate: 14° C at 8 W/m2, 19.5° C at 0.24 W/m2 and 24.5° C in darkness. Possible interpretations of these results are briefly presented.Abbreviations %SP
percentage of trophocysts initiating sporangiophores
- D50%
duration of treatment required to 50% sporangiophore initiation |
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Keywords: | Light and sporangiophore initiation Phycomycetes Pilobolus Sporangiophore Temperature and sporangiophore initation |
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