- Autor(in)
- Seitenbereich
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051 - 060
- Zusammenfsg.
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Both mating types of Chlamydomonas reinhardtii (strain 137c) were investigated for the presence of the gamete-specific mating structures, after they had been maintained for 6 days under continuous illumination on nitrogen-free agar-medium. Analysis of series of ultrathin sections through the part of the cell apex that in any case should contain the mating structure failed to detect this visible sign of competent gametes, and confirmed the lack of flagella. These results indicate (i) that, despite of the absence of nitrogen and the presence of light, gametogenesis could not be completed on agar; (ii) that the solid and/or "dry" environment not only influences the outgrowth of the flagella but also the development of the mating structure. It is argued that the fluidity of the environment is one of the exogeneous factors that triggers gametogenesis.