(2034) Proposal to conserve Blechnum hawaiianum against B. norfolkense (Blechnaceae , Pteridophyta )
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چکیده
منابع مشابه
Sporophyte morphology and gametophyte development of the fern Blechnum sprucei (Pteridophyta: Blechnaceae).
The fern Blechnum sprucei grows in Mesoamerica (Costa Rica) and South America, from Colombia to Bolivia, SE and centre of Brazil, Paraguay and Argentina. It is a distinctive, somewhat vulnerable, mostly orophilous species. Fresh and dry herbarium material was used for this study. Herbarium material for anatomical studies comes from CTES, BA, LP, MA, SI and UC (Holmgren et al. 1990). Selected re...
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Morphological stomatal traits, such as size, form and frequency, have been subject of much literature, including their relationships with environmental factors. However, little effort have focused on ferns, and very few in the genus Blechnum. Stomatal length, width and frequency (as stomatal index) of a number of specimens of fourteen Neotropical species of Blechnum were measured in adult pinna...
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The strain-specific modifier Ssm1 is responsible for the straindependent methylation of particular E. coli gpt-containing transgenic sequences.Here,we identifySsm1as theKRAB-zinc finger (ZF) gene 2610305D13Rik located ondistal chromosome4.Ssm1b is amember of a gene family with an unusual array of three ZFs. Ssm1 family members in C57BL/6 (B6) and DBA/2 (D2) mice have various amino acid changes ...
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Previous studies have found alterations in the columnar organization of the cortex in autism spectrum disorders. Such changes have been suggested to be limited to higher order association areas and to spare primary sensory areas. In addition, evidence from geneexpression studies have suggested that there may be an attenuation of cortical differentiation in autism spectrum disorders. The present...
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This article examines how accounting transparency and corporate governance interact. Firms with better governance are associated with higher abnormal returns, but even more so if they also have higher transparency. The effect is largely monotonic—it is small and insignificant for opaque firms and large and significant for transparent firms—and survives numerous robustness tests. We find support...
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ژورنال
عنوان ژورنال: TAXON
سال: 2011
ISSN: 0040-0262
DOI: 10.1002/tax.606024