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Search Results: 1 - 10 of 13681 matches for " XUE Junzeng "
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Invasion and Morphological Variation of the Non- Indigenous Barnacle Chthamalus challengeri(Hoek, 1883) in Yangshan Port and its Surrounding Areas Invasion and Morphological Variation of the Non- Indigenous Barnacle Chthamalus challengeri(Hoek, 1883) in Yangshan Port and its Surrounding Areas
LIU Yan,XUE Junzeng,LIN Junda,WU Huixian
- , 2015,
Abstract: Invasive species generally possess unique characteristics that allow them to survive the invasion process in order to establish and spread in new habitats. Successful invaders must resist both physical and physiological stresses associated with the changing environment. A common littoral barnacle, Chthamalus challengeri Hoek, 1883(Crustacea, Cirripedia), which is native to Japan, South Korea and northern China, has become established in the high-littoral zone adjacent to Yangshan Port, Shanghai, China. A comparison of the morphology of Chthamlus species from Zhoushan archipelago with previous description indicates the occurrence of C. challengeri. The new immigrant becomes a dominant species in certain high-intertidal habitats of the adjacent area to of Yangshan Port. C. challengeri was found in part of sampling sites in Zhoushan in 2010; however, it dispersed to all the eleven sampling sites in 2012. Densities of C.challengeri had increased over 10 times in the last 2 years, with the highest mean value reaching 39533 ± 6243 ind. m-2 in the new habitat. The specific ratios of both operculum area(Sa) to base area(SA) and average height of parietal plates(H) to length of base(L) revealed that C. challengeri displays morphological changes to resist stronger currents in the new habitats for invasion
Orientation, Attachment and Population Characteristics of the Goose Barnacle Octolasmis neptuni Living on the Gills and Mouth Appendages of the Swimming Crab Portunus trituberculatus
蟹板茗荷在三疣梭子蟹体上的附着定向及种群变动

XUE Junzeng,WU Huixian,
薛俊增
,吴惠仙

生态学报 , 2002,
Abstract: Octolasmis is a special Genus in Cirripede. Octolasmis spp. attached on the gills and appendages of crab. They have formed the special biological characteristics for adapting the sessile life during the long term evolutionary process, effecting the breath, development and ingestion of hosts. Goose barnacle, O. neptuni attached on the gills and appendages of the swimming crab, Portunus trituberculatus, one of the important crab in China, effecting the growth and development of the hosts. We stu...
On the chitin digestive bacteria from larval gut of Eriocheir sinensis
中华绒蟹幼体消化道甲壳质消化细菌的研究

XUE Junzeng,WU Huixian,
薛俊增
,吴惠仙

应用生态学报 , 2003,
Abstract: The foregut,mid gut and hind gut of Eriocheir sinensis from the first Zoea to Megalopa were dissected under asepsis condition. Bacteria were separated by plate culture after liquid medium culture. A chitin digestive bacterium was separated from the first Zoea foregut. The chitin digestive bacteria weren't founded in the same experiment from the second Zoea to Megalopa. The chitin digestive bacteria showed roundness, protuberance, glassy humid, margin regular, milk yellow, aerotolerant anaerobe,and growing intently surrounding the chitin on the plate culture medium. The chitin could promote the growth rate of some digestive bacteria in larval gut of the crab.
Seasonal variation and longitudinal distribution characters of cladocerans in the Three Gorges Reservoir
三峡水库初次蓄水后干流库区枝角类的空间分布与季节变化

Huixian Wu,Jianliang Yao,Yan Liu,Junzeng Xue,Qinghua Cai,Jiankang Liu,
吴惠仙
,姚建良,刘艳,薛俊增,蔡庆华,刘建康

生物多样性 , 2009,
Abstract: To reveal patterns of longitudinal distribution, seasonal variation, and ecological succession in cladocerans communities in the Three Gorges Reservoir, ten sites were used to sample cladoceran communities across a longitudinal gradient from April, 2004 to January, 2005. Nine cladoceran species were collected throughout the year. Species richness was highest in spring (8 species), lower in summer (5 species) and winter (3 species), and lowest in autumn (2 species). Cladoceran species composition varied across sampling sites. Four species were collected from river sampling sites and seven species from reservoir sampling sites. Cladoceran species richness decreased gradually with increasing distance to the dam within the reservoir area. Cladoceran density and biomass varied among seasons (P <0.01) and sampling sites (P <0.01), and both were highest in spring. Density and biomass of cladocerans in river areas were lower than in the reservoir area. Density and biomass of cladoceran in up area of reservoir was lower than that in down area of reservoir. The cladoceran communities of the Three Gorges Reservoir showed distinct patterns in both longitudinal distribution and seasonal variation.
Seasonal variation and longitudinal distribution of copepods in the main river area of the Three Gorges Reservoir
三峡水库初次蓄水后干流库区桡足类的纵向分布与季节变化

Jianliang Yao,Junzeng Xue,Dengyuan Wang,Qinghua Cai,Xiangfei Huang,Jiankang Liu,
姚建良
,薛俊增,王登元,蔡庆华,黄祥飞,刘建康

生物多样性 , 2007,
Abstract: The ecosystem of the Three Gorges in Yangtze River was changed into an artificial lake(reservoir) ecosystem after impoundment in June 2003.We surveyed the seasonal variation and spatial distribution of copepods from April 2004 to January 2005 in order to provide basic data for clarifying the successional pat-tern of the ecosystem.From Jiangjin to Maoping,eight copepod species were collected,belonging to Ca-lanoida,Harpacticoida,and Cyclopoida.Of these,Mesocyclops pehpeiensis,M.leuckarti and Sinocalanus dorrii had a relatively wide distribution.No distinct difference in species number was found among sampling sites,but the species composition was different.Species composition,distribution and density of copepods showed significant seasonal variation.Copepod density showed an obvious gradient with the distance from the reservoir dam:the nearer to the dam,the denser the copepods.
Metabolomics Profile of Potato Tubers after Phosphite Treatment  [PDF]
Xingxi Gao, Steven Locke, Junzeng Zhang, Jyoti Joshi, Gefu Wang-Pruski
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.94065
Abstract: Phosphite (Phi)-based fungicides are used to control the oomycete Phytophthora infestans which causes late blight disease, the most devastating disease in potatoes. In order to examine the effects of Phi-based fungicides on potato tubers through foliar or post-harvest application, a metabolite profiling approach based on gas chromatography coupled to mass spectrometry (GC-MS) has been established. A total of 132 metabolites were detected using the GC-MS approach. Among these, 34 metabolites were identified after normalization and annotated with a compound name with standard mass spectral library. Metabolomic analysis of Phi-treated plants showed significant differences in the levels of many metabolites especially amino acids. Multivariate statistical approaches, such as principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA), were employed to explore the relationships between metabolites to detect group differences. A good discrimination between the control and the Phi-treated plants was observed, which demonstrated that significant changes in the metabolite profile have been caused by the two different Phi applications (foliar or post-harvest). This finding suggests that the alteration of specific metabolite levels by accumulation of Phi can lead to resistance against the pathogen.
Liuwei Dihuang Lowers Body Weight and Improves Insulin and Leptin Sensitivity in Obese Rats
Benjamin Perry,Junzeng Zhang,Changhao Sun,Tarek Saleh,Yanwen Wang
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/847167
Abstract: The present study was aimed at investigating the efficacy and mechanism(s) of action of a Chinese herbal formulation, Liuwei Dihuang (LWDH), as a prospective natural weight-lowering product. Following a 2-week acclimation period, 48 obesity-prone (OP-CD) rats were divided into 4 groups (=12 each). One group served as a positive control for obesity (OP), while the other 3 were challenged twice daily by oral gavage with total daily dosages of 500, 1500, or 3500 mg/kg BW LWDH, respectively, for 10 weeks. One group (=12) of obesity-resistant (OR-CD) rats served as the normal control group. All rats were fed the same AIN-93G diet modified to contain 60% energy from fat. The highest LWDH dose significantly reduced body weight during the last 4 weeks of treatment. Food intake was reduced beginning in week 2. The high LWDH dose lowered serum triglyceride (TG) and nonesterified fatty acid (NEFA) levels and body fat. Both the high and medium doses also lowered serum leptin and insulin levels. Liver function testing revealed no adverse side effects under the current experimental conditions. The results of the present study suggest that LWDH has potential as a preventive or therapeutic natural product against overweight and obesity.
Chemical Structures and Bioactivities of Sulfated Polysaccharides from Marine Algae
Guangling Jiao,Guangli Yu,Junzeng Zhang,H. Stephen Ewart
Marine Drugs , 2011, DOI: 10.3390/md9020196
Abstract: Sulfated polysaccharides and their lower molecular weight oligosaccharide derivatives from marine macroalgae have been shown to possess a variety of biological activities. The present paper will review the recent progress in research on the structural chemistry and the bioactivities of these marine algal biomaterials. In particular, it will provide an update on the structural chemistry of the major sulfated polysaccharides synthesized by seaweeds including the galactans (e.g., agarans and carrageenans), ulvans, and fucans. It will then review the recent findings on the anticoagulant/antithrombotic, antiviral, immuno-inflammatory, antilipidemic and antioxidant activities of sulfated polysaccharides and their potential for therapeutic application.
Transcriptional and metabolomic analysis of Ascophyllum nodosum mediated freezing tolerance in Arabidopsis thaliana
Nair Prasanth,Kandasamy Saveetha,Zhang Junzeng,Ji Xiuhong
BMC Genomics , 2012, DOI: 10.1186/1471-2164-13-643
Abstract: Background We have previously shown that lipophilic components (LPC) of the brown seaweed Ascophyllum nodosum (ANE) improved freezing tolerance in Arabidopsis thaliana. However, the mechanism(s) of this induced freezing stress tolerance is largely unknown. Here, we investigated LPC induced changes in the transcriptome and metabolome of A. thaliana undergoing freezing stress. Results Gene expression studies revealed that the accumulation of proline was mediated by an increase in the expression of the proline synthesis genes P5CS1 and P5CS2 and a marginal reduction in the expression of the proline dehydrogenase (ProDH) gene. Moreover, LPC application significantly increased the concentration of total soluble sugars in the cytosol in response to freezing stress. Arabidopsis sfr4 mutant plants, defective in the accumulation of free sugars, treated with LPC, exhibited freezing sensitivity similar to that of untreated controls. The 1H NMR metabolite profile of LPC-treated Arabidopsis plants exposed to freezing stress revealed a spectrum dominated by chemical shifts (δ) representing soluble sugars, sugar alcohols, organic acids and lipophilic components like fatty acids, as compared to control plants. Additionally, 2D NMR spectra suggested an increase in the degree of unsaturation of fatty acids in LPC treated plants under freezing stress. These results were supported by global transcriptome analysis. Transcriptome analysis revealed that LPC treatment altered the expression of 1113 genes (5%) in comparison with untreated plants. A total of 463 genes (2%) were up regulated while 650 genes (3%) were down regulated. Conclusion Taken together, the results of the experiments presented in this paper provide evidence to support LPC mediated freezing tolerance enhancement through a combination of the priming of plants for the increased accumulation of osmoprotectants and alteration of cellular fatty acid composition.
Berberine Improves Glucose Homeostasis in Streptozotocin-Induced Diabetic Rats in Association with Multiple Factors of Insulin Resistance
Yanfeng Chen,Yanwen Wang,Junzeng Zhang,Changhao Sun
ISRN Endocrinology , 2011, DOI: 10.5402/2011/519371
Abstract:
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