Polyploidy and Speciation in Pteris (Pteridaceae)
نویسندگان
چکیده
منابع مشابه
Chemical constituents of Pteris cretica Linn. (Pteridaceae)
1. Subject and Source The group of fern from the genus Pteris (Pteridaceae) contains 250 cosmopolitan species (Mabberley, 1997). One species, P. cretica (Japanese name: ohbano-inomotoso) called Cretan brake fern is widely distributed in the temperate and warm area of Japan. Although some fern members of the family Pteridaceae are well known to contain carcinogenic C-14 illudane-type sesquiterpe...
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The Pteris cadieri complex displays extensive morphological variation and seems to have originated through hybridization. However, the members of this complex reproduce by apogamy, which usually limits genetic variation. To evaluate the hypotheses of hybrid origins, the pattern of evolution in this species complex is reconstructed. Multiple methodologies were used. Diploids, triploids, and tetr...
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Pteris fauriei is widely distributed in Eastern Asia and has high morphological variation. Some morphologically similar plants related to this species are difficult to distinguish. We showed that the new Pteris species from Taiwan, previously identified as P. fauriei, can be morphologically distinguished by its wide pinnae, larger terminal pinnae than the lateral pinnae in sterile fronds, and t...
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Even though antimony (Sb) and arsenic (As) are chemical analogs, differences exist on how they are taken up and translocated in plants. We investigated 1) Sb uptake, efflux and speciation in arsenic hyperaccumulator Pteris vittata after 1 d exposure to 1.6 or 8 mg/L antimonite (SbIII) or antimonate (SbV), 2) Sb uptake by PV accessions from Florida, China, and Brazil after 7 d exposure to 8 mg/L...
متن کاملMycorrhizal association in gametophytes and sporophytes of the fern Pteris vittata (Pteridaceae) with Glomus intraradices.
A Ferns, which are usually colonizing different environments and their roots frequently present mycorrhization, have two adult stages in their life cycle, the sporophytic and the gametophytic phase. This paper describes the experimental mycorrhizal association between Pteris vittata leptosporangiate fern and a strain of Glomus intraradices during the life cycle of the fern, from spore germinati...
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ژورنال
عنوان ژورنال: Journal of Botany
سال: 2012
ISSN: 2090-0120,2090-0139
DOI: 10.1155/2012/817920