Abstract
IT was noticed that gemma-cups in the New Zealand liverwort Marchantia berteroana L. and L. (= M. tabularis Nees) were not produced when the pots were covered with glass or polythene sheets. That this effect is the result of increased humidity has been confirmed by growing plants in the saturated atmosphere of a permanent-spray house, but protected from direct falling water. All experiments were carried out on sets of 60 plants, started from disks of Marchantia thallus 1 cm in diameter, grown in pots of sterilized garden soil. In all experiments except the second every disk had its counterparts, cut from the same thallus, in the corresponding position in each treatment so that the material under the different treatments was exactly comparable.
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SCOTT, G. Suppression of Gemma-cups in Marchantia by High Humidity. Nature 200, 1123 (1963). https://doi.org/10.1038/2001123a0
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DOI: https://doi.org/10.1038/2001123a0
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