Abstract
Himalayan populations of an advanced leptosporangiate fern,Hypodematium crenatum (Forsk.) Kuhn contain three cytotypes: diploid, triploid, and tetraploid. This paper describes spore germination and genotypically determined developmental and morphological plasticity of the gametophytes of triploid sporophyte. While the haploid and diploid gametophytes from the diploid and tetraploid sporophytes developed normally, those from the triploid exhibited an interesting array of morphogenetic alterations under the same culture conditions. These included formation of twin and multiple protonemata, displacement of metaphase spindle during successive mitoses, inhibition and/or delayed rhizoidal differentiation, lack of spore polarity and hypertrophy/allometric growth of protonemal cells.
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Loyal, D.S., Paik, P. & Tiwana, G. Gametophytic abnormalities in a triploid fernHypodematium crenatum (Forsk.) Kuhn. Proc. Indian Acad. Sci. 86, 107–116 (1977). https://doi.org/10.1007/BF03050913
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DOI: https://doi.org/10.1007/BF03050913