Question: Was ist Suspensor?


In the literature there is disagreement about the existence of a coleorhiza in cycad embryos. In this paper the terminology of the cycad ovule, seed and embryo is revised. It was confirmed that the cycad ovule and seed are pachychalazal and that the seed coat is exclusively formed by the pachychalaza. The anatomy of the cycad embryo was studied in comparison with the grass embryo and it was Was ist Suspensor?

Was ist Suspensor?

that a coleorhiza does exist in cycad embryos and derives from the distal part of the Was ist Suspensor?. It is postulated that the coleorhiza in grasses also derives from the distal part of the suspensor and that the two structures are therefore structurally homologous. In der Literatur gibt es Unstimmigkeit über die Existenz einer Coleorhiza in Palmfarn-Embryonen.

In diesem Dokument werden die Termen der Palmfarne Samenanlage, Saatgut Was ist Suspensor? Embryo überarbeitet. Es wurde bestätigt, dass die Palmfarnen-Samenanlage und Saatgut Pachychalazal sind, und dass das Saatgut-Fell ausschließlich durch das Pachychalaza gebildet wird.

Suspensorium : definition of Suspensorium and synonyms of Suspensorium (German)

Die Anatomie der Palmfarn-Embryos wurde untersucht, im Vergleich zu Gras Embryonen und es wurde gefunden, dass eine Coleorhiza in Palmfarn-Embryonen vorhanden ist und stammt von dem distalen Teil des Suspensors.

Es wird postuliert, dass die Coleorhiza in Gräser auch abgeleitet ist aus dem distalen Teil des Suspensors und das beide Strukturen daher struktur-gemäss homolog sein. The encyclopedia of seeds: science, technology and uses. The pachychalaza in Dicotyledons:primitive or advanced? Journal of the Linnaean Sociey 108: 15—19. Anatomy of seed plants, ed. Comparative morphology of vascular plants, ed.

Was ist Suspensor?

Does a cycad seedling have a coleorhiza? Lehrbuch der Botanik Für Hochschulen. The structure and reproduction of corn.

Was ist Suspensor?

Research Bulletin 161, University of Nebraska College of Agriculture, Agricultural Experiment Station. The biology of the Cycads.


Unusual orthotropous germination in seeds of Cycas rumhii Miq. And the morphological nature of cycad coleorhiza. Plant Science Bulletin 2: 9—14. Life-history of Cycas circinalis L.

Proceedings of the Indian academy of sciences. A re-evaluation of the structure of the mango ovule in comparison with those of a few other Anacardiaceae species.

South African Journal of Botany 52: 17—24. Seed coat anatomy of Ceratozamia mexicana Cycadales. The Botanical Review 70: 24—38.

Morphology and Systematics of Was ist Suspensor? Cycadales. Memoirs of the New York Botanical Garden 57: 8—55. Embryogenesis in Zea mays L. Cite this article Robbertse, H. Origin of the Coleorhiza in Cycad Seedlings and its Structural Homology with That of the Poaceae.

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