Induction of Biplanar Growth in Fern Gametophytes |
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Authors: | V. RAGHAVAN |
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Affiliation: | School of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia and Department of Botany, The Ohio State University, Columbus, Ohio 43210, USA |
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Abstract: | In constant white light, protonemata of different ages of Asplenium nidus produce a fixed number of cells before they become biplanar. Protonemata with a lower initial cell number require a longer time to become biplanar than those with a higher initial cell number. Increasing the photoperiod or the light intensity reduces the cell number in the filament at the time of initiation of biplanar morphology. It is suggested that inductive light acts directly on cell metabolism to induce biplanar morphology, rather than indirectly by inducing mitotic activity. |
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