Corpus ID: 87442673

Morphologisch-biologische studien uber die Gattung Mitrastemon

  title={Morphologisch-biologische studien uber die Gattung Mitrastemon},
  author={清彦 渡邊},
Germination and Seed/Embryo Size in Holoparasitic Flowering Plants with “Dust Seeds” and an Undifferentiated Embryo
It is found that not much progress has been made in understanding dormancy-break/germination in these holoparasites since 1969, when the author of a book on parasitic flowering plants pointed out how little the authors know about their germination. Expand
Striking developmental convergence in angiosperm endoparasites.
The authors' results illuminate two distinct developmental trajectories in endoparasites, one of which involves the retention of embryonic characteristics and late connection with host vessels, as demonstrated in species of Apodanthaceae, Cytinaceae, Mitrastemonaceae, and Rafflesiaceae and the second involves tissue specialization and early connection withhost xylem, as exemplified by Santalaceae species. Expand
Holoparasitic Rafflesiaceae possess the most reduced endophytes and yet give rise to the world's largest flowers.
It is concluded that the endophyte probably develops directly from a proembryo, and not from an embryo proper, and the flowering shoot arises directly from the undifferentiated endophytes, which is exceptional within angiosperms and warrants additional investigation. Expand
Embryology of the Irvingiaceae, a family with uncertain relationships among the Malpighiales
Investigation of embryological characters of two previously unstudied African species, Irvingia gabonensis and I. smithii, and compared them with other Malpighiales and the sister group Oxalidales showed that Irvingia did not resemble any of the Linaceae, Caryocaraceae, Erythroxylaceae, Rhizophoraceae, or the other malpighiaean families for which embryological data are available. Expand
Zur Frage der Phylogenie der Endospermtypen bei den Angiospermen
Die vermutete phylogenetisehe Entwieklung des Endosperms, vergliehen mit den Ergebnissen der Systematik. Expand
Comparative structure of ovules and seeds inRafflesiaceae
Seed structure strongly confirms the existing subfamilial classification and supports additional arguments for the generic status of Apodanthes, and does not support a separate status of the genus Berlinianche. Expand
Comparative floral structure and systematics in Apodanthaceae (Rafflesiales)
Comparative studies on floral morphology, anatomy, and histology were performed and Berlinianche was studied for the first time in detail and its affinity to Apodanthaceae was confirmed. Expand
Gynoecium diversity and systematics of the paleoherbs
The results strongly support three pairs of families in sister group relationships, as suggested by studies based on other characters: Cabombaceae-Nymphaeaceae, Saururaceae-Piperaceae, and Lactoridaceae-Aristolochi Families, and Hydnoraceae-Rafflesiaceae to some extent. Expand
A revision of Mitrastema (Rafflesiaceae)
Mitrastema Makino (Rafflesiaceae), usually incorrectly called Mitrastemon Makino, has two species, one in Southeast Asia and one in Central and South America.