WordNet
- coextensive with the family Taxaceae: yews (同)order Taxales
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/11/16 23:42:26」(JST)
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The plant order Taxales was until recently treated as a distinct order in the division Pinophyta, class Pinopsida, and included only those species in the family Taxaceae, known commonly as yews. Under this interpretation, all other conifers were classified separately in the order Pinales. Recent genetic and micromorphological studies, however, have shown the Taxaceae are closely related to the other conifers, particularly so to the family Cephalotaxaceae. The order Taxales is therefore no longer recognised as distinct, and the family Taxaceae is now included in the order Pinales. See Pinophyta for more details.
The fleshy aril which surrounds each seed in the yew is a highly modified seed cone scale.
References[edit]
- Gymnosperm Database - Pinales
English Journal
- [Systematic relationships of podocarpales, cephalotaxales, and taxales based on comparative seed anatomy and biochemistry data].
- Semikhova VF, Aref'eva LP, Novozhilova OA, Timoshchenko AS, Kostrikin DS.AbstractThe morphology of female reproductive organs and anatomy, ultrastructure, and ultrasculpture of seed integuments were studied in more than 150 species of Podocarpales, Cephalotaxales, and Taxales. The main trends of morphological-evolutionary transformations of female fructifications were established in three studied groups of gymnosperms. The taxonomic weight of structural features of the female reproductive organs of Podocarpales, Cephalotaxales, and Taxales was determined. Seeds of 20 species of these orders were investigated using amino acid and Western blot analysis. The index of remoteness from the least specialized hypothetical taxon and degree of difference between taxa were calculated from data on amino acid composition of seeds and embryos. The differences in the degree of similarity between Podocarpales and other groups of gymnosperms were demonstrated. An original concept was proposed for phylogenetic relations between Podocarpales, Cephalotaxales, and Taxales.
- Izvestiia Akademii nauk. Seriia biologicheskaia / Rossiĭskaia akademiia nauk.Izv Akad Nauk Ser Biol.2001 Sep-Oct;(5):544-56.
- The morphology of female reproductive organs and anatomy, ultrastructure, and ultrasculpture of seed integuments were studied in more than 150 species of Podocarpales, Cephalotaxales, and Taxales. The main trends of morphological-evolutionary transformations of female fructifications were establishe
- PMID 15926317
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