Several achlorophyllous orchids associate with ectomycorrhizal hymenomycetes deriving carbon from surrounding trees for the plant. However, this has not been shown for achlorophyllous orchids associating with species of Rhizoctonia, a complex of basal lineages of hymenomycetes that are the most common orchid partners. We analysed Neottia nidus-avis, an achlorophyllous orchid symbiotic with a Rh...

The mykotrophic orchid Neottia nidus-avis (L.) Rich. is not able to evolve oxygen in the light. Plastid preparations from the lip (labellum) of the orchid perform a photosystem I-dependent photoreduction of methylviologen with the artificial electron donor couple 2,6-dichlorophenol indophenol ascorbate. Photosystem II reactions such as the ferricyanide Hill reaction or the photoreduction of 2,6...

We report a case of unruptured arteriovenous malformation in which an extensive zone of increased signal intensity in the brain parenchyma adjacent to the nidus is demonstrated on T2-weighted MR. This area of perilesional hyperintense signal exerts a compressive effect, suggesting that it represents perilesional edema.

A continuous sequence of 20,374 bp has been produced corresponding to an equivalent region of the mitochondrial genome of the fern Asplenium nidus. The information content of this sequence includes: several segments from chloroplast origin, three tRNA genes of probable native type, a couple of inverted repeats, three protein genes and a seg-

Since 2013, symptoms indicative of I. nidus-pici infections were recorded in various stands the central part Serbia and several tree species from Fagaceae family affected. After detailed sampling, isolation identification fungus using both classical molecular methods, current distribution host range determined. This was at 17 additional localities Serbia, Q. cerris most common affected host. Fu...

BACKGROUND AND PURPOSE The morphologic features of brain arteriovenous malformations differ between children and adults; therefore, our aim was to analyze various features of brain arteriovenous malformations to assess the risk of hemorrhage in children. MATERIALS AND METHODS We identified all consecutive children admitted to Beijing Tiantan Hospital for brain arteriovenous malformations betw...

BACKGROUND AND PURPOSE Brain perfusion is disturbed by cerebral arteriovenous malformations (AVMs). Our study was conducted to determine the radiosurgical effects on this disturbed perfusion. METHODS MR perfusion imaging with independent component analysis was performed in five healthy subjects and 19 patients with AVM before and after radiosurgery (every 6 months up to 2 years). Perfusion ma...