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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Long-Term Effects Of Estradiol Replacement In The Olfactory System, Britto P. Nathan, Michael Tonsor, Robert G. Struble
Long-Term Effects Of Estradiol Replacement In The Olfactory System, Britto P. Nathan, Michael Tonsor, Robert G. Struble
Britto P. Nathan
Olfactory dysfunction often precedes other clinical symptoms in chronic neurodegenerative diseases like Alzheimer’s and Parkinson’s disease. Estrogen deficiency and apoE genotype are known risk factors in these diseases and these factors also affect olfaction. Therefore we examined the effects of estradiol replacement following ovariectomy on expression of apoE and markers of cell proliferation, neuronal maturation, synaptogenesis and reactive gliosis in the primary olfactory pathway of wild-type (WT) and apoE knockout (KO) mice. Estradiol replacement increased apoE staining in the olfactory nerve and glomerular layers. Estradiol increased astrocyte density and olfactory epithelium (OE) thickness regardless of the genotype. In addition estradiol …
A New Species Of Saphonecrus (Hymenoptera, Cynipoidea) Associated With Plant Galls On Castanopsis (Fagaceae) In China, Zhiwei Liu, Xiao-Hui Yang, Dao-Hong Zhu, Yi-Yuan He
A New Species Of Saphonecrus (Hymenoptera, Cynipoidea) Associated With Plant Galls On Castanopsis (Fagaceae) In China, Zhiwei Liu, Xiao-Hui Yang, Dao-Hong Zhu, Yi-Yuan He
Zhiwei Liu
A new cynipid species, Saphonecrus hupingshanensis Liu, Yang, et Zhu, sp. nov. (Hymenoptera: Cynipidae: Synergini), is described from China. This is the first species of the inquilinous tribe Synergini ever known to have an association with chinquapins (Fagaceae: Castanopsis). The biology and implication to species diversity of Cynipidae in eastern and southeast Asia are discussed.
Taxonomic Revision Of True Morels (Morchella) In Canada And The United States, Michael Kuo, Damon R. Dewsbury, Kerry O'Donnell, M. Carol Carter, John David Moore, Stephen A. Renner, Jean-Marc Moncalvo, Stephen A. Canfield, Steven L. Stephenson, Andrew S. Methven, Thomas J. Volk
Taxonomic Revision Of True Morels (Morchella) In Canada And The United States, Michael Kuo, Damon R. Dewsbury, Kerry O'Donnell, M. Carol Carter, John David Moore, Stephen A. Renner, Jean-Marc Moncalvo, Stephen A. Canfield, Steven L. Stephenson, Andrew S. Methven, Thomas J. Volk
Andrew S. Methven
Recent molecular phylogenetic studies have revealed the existence of at least 50 species of Morchella worldwide and demonstrated a high degree of continental endemism within the genus. Here we describe 19 phylogenetic species of Morchella from North America, 14 of which are new (M. diminutiva, M. virginiana, M. esculentoides, M. prava, M. cryptica, M. frustrata, M. populiphila, M. sextelata, M. septimelata, M. capitata, M. importuna, M. snyderi, M. brunnea and M. septentrionalis). Existing species names (M. rufobrunnea, M. tomentosa, M. punctipes and M. angusticeps) are applied to four phylogenetic species, and formal description of one species (M. sp. "Mel-8") is …
Size Assortment In Mixed-Species Groups Of Juvenile-Phase Striped Parrotfish (Scarus Iserti) In The Bahamas, Paul Switzer, Daniel Quinn
Size Assortment In Mixed-Species Groups Of Juvenile-Phase Striped Parrotfish (Scarus Iserti) In The Bahamas, Paul Switzer, Daniel Quinn
Paul V. Switzer
Striped parrotfish (Scarus iserti) often form heterospecific groups with other reef fishes. In this study, we examined the species and body size composition of these groups on reefs in The Bahamas. Groups averaged approximately 4 S. iserti and 2 associated species, with surgeonfish (Acanthurus chirurgus and A. bahianus), slippery dick (Halichoeres bivittatus), and bluehead wrasse (Thalassoma bifasciatum) as the most common associates. Fewer groups than expected had only 1 associate; groups with 3 or more associates were more common than expected. Both the S. iserti and associated species tended to be closely sizematched within a group, perhaps due to benefits …
Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn D. Mansfield
Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn D. Mansfield
Thomas Canam
The raffinose family of oligosaccharides (RFOs) serve as transport carbohydrates in the phloem, storage compounds in sink tissues, and putative biological agents to combat both abiotic and biotic stress in several plant species. To investigate further the functional roles of this class of compounds in trees, two cDNAs encoding galactinol synthase (GolS, EC 2.4.1.123), which catalyses the first step in the biosynthesis of RFOs, were identified and cloned from hybrid poplar (Populus alba3grandidentata). Phylogenetic analyses of the Populus GolS isoforms with other known GolS proteins suggested a putative role for these enzymes during biotic or abiotic stress in hybrid poplar. …
Sequencing And Phylogenetic Analysis Of The Wsp Gene Of Wolbachia In Three Geographic Populations Of An Oak Gall Wasp, Andricus Mairei (Hymenoptera: Cynipidae), From Hunan, South China, Xiao-Hui Yang, Dao-Hong Zhu, Zhiwei Liu, Ling Zhao
Sequencing And Phylogenetic Analysis Of The Wsp Gene Of Wolbachia In Three Geographic Populations Of An Oak Gall Wasp, Andricus Mairei (Hymenoptera: Cynipidae), From Hunan, South China, Xiao-Hui Yang, Dao-Hong Zhu, Zhiwei Liu, Ling Zhao
Zhiwei Liu
To understand the effects of Wolbachia in Andricus mairei Kieffer , an oak gall wasp ( Cynipini, Cynipidae) that forms clusters of up to 30 monothalamous galls in the catkins of Quercus glandulifera var. brevipetiolata Nakai, we examined the presence and infection frequency of Wolbachia in three widely separated geographic populations of A. mairei in Hunan Province, South China, using polymerase chain reaction and sequence determination of the wsp gene of Wolbachia from the three populations. Our survey results showed that Wolbachia infection rates were unusually high in the three test populations : 100% for the male wasps from all …
The Swimming Behavior Of The Aquatic Larva Of Neoneuromus Ignobilis (Megaloptera: Corydalidae: Corydalinae)., Cheng-Quan Cao, Zhiwei Liu, Shen-Zhi Chen, Chao Tong
The Swimming Behavior Of The Aquatic Larva Of Neoneuromus Ignobilis (Megaloptera: Corydalidae: Corydalinae)., Cheng-Quan Cao, Zhiwei Liu, Shen-Zhi Chen, Chao Tong
Zhiwei Liu
In order to explore the pattern and significance of swimming, through photos and videos we observed and recorded the swimming behavior of the aquatic larvae of Megaloptera in detail for the first time using the endemic Chinese species Neoneuromus ignobilis Navas, 1932 as the test insect, which were collected from the Dadu River and reared in nature-simulated environments. Four swimming postures are recognized and described herein in detail, i. e., vertical, parallel, back and side swimming, and these postures were used by the larvae disproportionately, with a frequency of 89.08%, 5. 49%, 4. 40% and 0. 61% , respectively. The …