1,720,971 research outputs found
Sistotrema is a genus with ectomycorrhizal species - confirmation of what sequence studies already suggested
No full textThe ectomycorrhizal status of Sistotrema sp. is
shown by morphological–anatomical and molecular identification,
confirming earlier reports about Sistotrema
DNA in ectomycorrhizae (ECM). For molecular identification
of the ECM nuclear rDNA ITS sequences obtained
from mycorrhizal root tips and fruitbodies of Sistotrema
sp. were compared. Blast searches using the Sistotrema sp.
sequences as query were performed in GenBank and
UNITE for comparison with previously published Sistotrema
sequences. The morphological–anatomical characterization
of the ECM used well-established protocols for
the examination of all mantle parts and rhizomorphs in
different sections and views including detailed illustrations.
The ECM are irregularly monopodial–pyramidal,
whitish ochre to yellow ochre, and woolly. Older ones
become more greyish and silvery at some patches.
Diagnostic anatomical characteristics are irregularly inflated
emanating and rhizomorph hyphae, ampullately
inflated clamps, and the occurrence of yellow drops
within the hyphae. The plectenchymatous mantle shows
ring-like arranged hyphae, and a slightly gelatinous
matrix. The ECM of Sistotrema sp. are compared to those
of other species that form distinctly ampullate hyphae in
rhizomorphs, too. The anatomically most similar ECM to
those of this Sistotrema specimen are those of Hydnum
repandum
Quantitative and qualitative variations of ectomycorrhizal communities in beech coppices with different rotations
No full textChange of ectomycorrhizal vertical distribution with humus horizons in high mountain Norway spruce forests
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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