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Further comments on an ophioglossoid archetype for the angiosperm carpel: Ovular paedomorphosis
Author(s) -
Kato Masahiro
Publication year - 1991
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1222972
Subject(s) - gynoecium , neoteny , biology , primordium , context (archaeology) , ovule , botany , heterochrony , cryofixation , receptacle , zoology , pollen , stamen , ultrastructure , ontogeny , biochemistry , paleontology , genetics , gene
Summary Kato, M.: Further comments on an ophioglossoid archetype for the angiosperm carpel: Ovular paedomorphosis. ‐ Taxon 40: 189–194. 1991. ‐ ISSN 0040‐0262. Kato's recent hypothesis on the origin of the angiosperm carpel, suggesting an ophioglossoid fertile leaf as an archetype for the carpel, is evaluated in the context of heterochrony, which is argued to have been a major factor in the origin of angiosperms. Anatropy of angiosperm ovules, the most primitive type, is interpreted as derived by paedomorphosis from hyponastic curvature of ophioglossoid sporophore primordia and also leaf primordia, concomitant with paedomorphic changes at various levels of floral organization.