Marasmius campestris (Marasmiaceae, Agaricales), a member of sect. Globulares, is described as a new species from Hainan Island, a tropical region of China. It is morphologically characterized by an ...umbilicate, deeply sulcate and striped, purple-tinged pileus, a stipe covered with tiny scales, large basidiospores, well-developed cheilocystidia with irregular shape, a pileipellis consisting of Globulares-type cells, and growth in grassland. The phylogenetic analyses of DNA sequences from nuc rDNA internal transcribed spacer (ITS) also confirm that it forms an independent lineage within Marasmius. Consequently, a description, color photos of fresh basidiomata and line-drawings of microstructures are presented.
•Marasmius campestris is described as new species from tropical China.•The taxon is a member of sect. Globulares.•Color photos and line drawings are given for the taxon.
Electrical conductivity and a high surface area in the anode are of primary importance for the enhancement of photoelectric conversion efficiency (
η) in dye-sensitized solar cells (DSSCs). This ...study reports on the fabrication of a DSSC anode using ZnO nanostructures. These ZnO nanostructures are coated on vertically aligned carbon nanotubes (CNTs) on stainless steel substrates using thermal chemical vapor deposition. The resulting CNTs provided a good electric connection between the ZnO overlayer and the stainless steel substrate. The photoelectric characteristics of the DSSCs were optimized with the immersion of dye for 15
hrs. Compared to the
η of ZnO nanostructures on randomly distributed CNTs, the
η of ZnO nanostructures on vertically aligned CNTs increased approximately 4-fold. This result showed that the vertically aligned CNTs coated with ZnO nanostructures had improved the performance of DSSC.
►The resulting carbon nanotubes provided a good electric connection between the ZnO overlayer and the stainless steel substrate. ►The different dye immersion times affected the dye adsorption properties of the ZnO-coated vertically aligned carbon nanotube anode. ►This study determined the optimum dye immersion time and provided a novel strategy to improve the photoelectric conversion efficiency of dye-sensitized solar cells.
A new genus of Boletaceae, Pseudoaustroboletus, is described to accommodate the phylogenetically isolated species Tylopilus valens inferred by molecular and morphological data. The lineage consisted ...of T. valens was nested into the Boletaceae clade with high support value using nuclear genes: the large subunit of the nuclear ribosomal RNA (nrLSU), the translation elongation factor 1-alpha (tef1-α), and mitochondrial gene: the small subunit (mtSSU) of the ribosomal RNA, based on Maximum Likelihood and Bayesian analyses. Morphologically, Pseudoaustroboletus is distinguished from other boletoid lineages by a combination of morphological characters, including the pale pinkish to light pinkish or greyish pink hymenophore, the distinctly reticulated stipe surface, the smooth basidiospores, the brown to dark yellow-brown pigmented cystidia, and the trichodermial brown to dark brown pigmented pileipellis. Geographically, Pseudoaustroboletus is currently only known from China, Japan, Malaysia and Singapore under forests dominated by Fagaceae plants. The species and its variety macrosporus in this genus are fully documented with taxonomic descriptions and illustrations.
Based on studies of the types and additional materials, Boletellus emodensis and B. obscurecoccineus are described and illustrated in detail. Strobilomyces annamiticus is lectotypified and ...synonymized with B. emodensis; specimens from China regarded as B.
ananiceps are confirmed to represent B. emodensis; B. puniceus and Boletus megasporus, originally described from southwestern China, are conspecific with B. obscurecoccineus.
The rhizomes of
Alpinia officinarum
Hance (Zingiberaceae family) have been used as antiemetics, stomachics and analgesics in Asia for centuries. Unfortunately, the aerial parts were thrown away as ...waste whilst harvesting the rhizomes of
A. officinarum
. Recently, scientists reported that the ethanol extract of the aerial parts displayed anti-proliferation activity through mitochondrial pathway-induced cell apoptosis. However, the chemical composition of this extract remained largely unknown. We have identified sixteen chemicals including twelve flavonoids and four diarylheptanoids from the methanol extract of
A
.
officinarum
leaves using liquid chromatography/tandem mass spectrometry (LC-MS/MS). In order to better explore the potential value of the aerial parts, we need to know what the main constituents occurring in the aerial parts are and how the content of these chemicals is influenced by growing period. In the present study, a LC-MS/MS method was developed and validated for determination of seventeen compounds occurring both in the aerial parts and rhizomes sampled at different growing periods. The validation indices evaluated were satisfactory and the method was successfully employed to analyze the above-mentioned plant samples. Notably, we found that the content of these compounds, except for quercetin, was higher in rhizomes than in aerial parts. The six major constituents both in the aerial parts and rhizomes were galangin, kaempferide, hexahydrocurcumin, pinocembrin, chrysin and isorhamnetin. Moreover, the trends of change in content along with the sample period for most of the monitored phytochemicals were almost similar between the aerial parts and rhizomes. Our study should be of value in arousing everyone's interest to make the best use of the aerial parts of
A. officinarum
in the future.
Simultaneous quantification of 17 phytochemicals in rhizome and aerial parts of
Alpinia officinarum
Hance sampled at different growing periods using LC-MS/MS.
Boletus orientialbus is described as a new species from Fujian Province, a subtropical region of China. It is morphologically characterized by its white basidioma with a white and unchanging context, ...white pores becoming yellow with age, a reticulate stipe, and ellipsoid to elongate basidiospores. A detailed description, color photos of fresh basidiomata, and a line-drawing of microscopic features are presented.
Bothia fujianensis is described as a new species from Fujian Province, a subtropical region of China. It is morphologically characterized by its brown to pale reddish brown basidiomata, pale brown ...hymenophore, adnate to slightly decurrent, with subreticulations to ridges at the apex of the stipe, relatively longer pleurocystidia, and clavate, subclavate or ventricose cheilocystidia. Molecular phylogenetic analyses using the large subunit nuclear ribosomal RNA loci, DNA nucleotide sequences of the internal transcribed spacer region, and the translation elongation factor 1α also confirmed that B. fujianensis is distinct from B. castanella. The discovery of B. fujianensis in China indicates that Bothia has a much wider geographical distribution range occurring in East Asia and in North America.
(2012) DNA Sequence Analyses Reveal Abundant Diversity, Endemism and Evidence for Asian Origin of the Porcini Mushrooms. (2012) Correction: DNA Sequence Analyses Reveal Abundant Diversity, Endemism ...and Evidence for Asian Origin of the Porcini Mushrooms.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Type specimens of two Phylloporus species originally described from southwestern China were studied. The concept of P. luxiensis is refined with additional recently collected materials, while P. ...scabrosus is revealed to be a member of the genus Lentinus.
Hypholoma cinnabarinum (Strophariaceae, Agaricales), a species described from eastern China, was revisited based on new collections from the south of China, from which comprehensive descriptions, ...color photos and line drawings were obtained. In addition to morphological data, a phylogenetic analysis based on the nuclear ribosomal internal transcribed spacer region was also carried out, leading to the conclusion that H. cinnabarinum is a member of Agaricus subgenus Lanagaricus section Trisulphurati (Agaricaceae, Agaricales).
•Hypholoma cinnabarinum was revisited based on morphological and molecular data.•Comprehensive descriptions, color photos and line drawings are given for the taxon.•Hypholoma cinnabarinum is a member of Agaricus section Trisulphurati.
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