Biological Letters最新文献_第2页

Microhabitats and oribatid fauna: comparison of 2 sampling approaches 微生境与甲虫区系:两种取样方法的比较

Biological Letters Pub Date : 2016-06-01 DOI: 10.1515/biolet-2017-0005

P. Skubała

引用次数: 8

Moss mites (Acari: Oribatida) in soil revitalizing: a chance for practical application in silviculture 土壤再生中的苔藓螨(蜱螨目:恙螨目):在造林中实际应用的机会

Biological Letters Pub Date : 2014-12-01 DOI: 10.1515/biolet-2015-0007

A. Klimek, S. Rolbiecki

{"title":"Moss mites (Acari: Oribatida) in soil revitalizing: a chance for practical application in silviculture","authors":"A. Klimek, S. Rolbiecki","doi":"10.1515/biolet-2015-0007","DOIUrl":"https://doi.org/10.1515/biolet-2015-0007","url":null,"abstract":"Abstract The Oribatida (known as moss mites or beetle mites) increase the breakdown of organic material in the soil. The paper analyses the dynamics of their abundance and number of species after various treatments enriching the soil in 4 study areas: afforested post-agricultural area in the Tuchola Forest, afforested degraded post-military training area in Bydgoszcz-Jachcice, and forest nurseries at Białe Błota and Bielawy. The results show that in post-agricultural and degraded soils at the initial stages of forest succession, the density and number of species of oribatid mites were low, even after phyto-land-improvement (afforestation and lupin as green manure). In the forest nurseries, however, we recorded a positive effect of soil revitalizing after mulching with forest ectohumus (i.e. organic surface layer of the soil). The inoculation of soils with forest mesofauna appeared more effective in nursery plantations of silver birch (Betula pendula) and small-leaved lime (Tilia cordata), as compared with Scots pine (Pinus sylvestris). Thus to revitalize degraded soils effectively and to accelerate forest succession, apart from phytoland- improvement, it is advisable also to reintroduce mesofauna, e.g. with the use of forest ectohumus.","PeriodicalId":37816,"journal":{"name":"Biological Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/biolet-2015-0007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67269127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Mite species (Acari: Mesostigmata) new and rare to Polish fauna, inhabiting the soil of broadleaved forests dominated by small-leaved lime (Tilia cordata Mill.) in Kwidzyn Forest District (N Poland) 波兰Kwidzyn林区以小叶石灰(Tilia cordata Mill.)为主的阔叶林土壤中的螨类(蜱螨目:中刺螨目)新种和罕见种

Biological Letters Pub Date : 2014-06-01 DOI: 10.1515/biolet-2015-0001

Katarzyna Faleńczyk‐Koziróg, T. Marquardt, S. Kaczmarek

引用次数: 1

Antibacterial effect of an extract of the endophytic fungus Alternaria alternata and its cytotoxic activity on MCF-7 and MDA MB-231 tumour cell lines 内生真菌alternnaria alternata提取物对MCF-7和MDA MB-231肿瘤细胞株的抑菌作用及其细胞毒活性

Biological Letters Pub Date : 2014-06-01 DOI: 10.1515/biolet-2015-0002

U.S. EZHIL ARIVUDAINAMBI, A. Kanugula, S. Kotamraju, C. Karunakaran, A. Rajendran

{"title":"Antibacterial effect of an extract of the endophytic fungus Alternaria alternata and its cytotoxic activity on MCF-7 and MDA MB-231 tumour cell lines","authors":"U.S. EZHIL ARIVUDAINAMBI, A. Kanugula, S. Kotamraju, C. Karunakaran, A. Rajendran","doi":"10.1515/biolet-2015-0002","DOIUrl":"https://doi.org/10.1515/biolet-2015-0002","url":null,"abstract":"Abstract There is a growing need for new and effective antimicrobial agents to treat life-threatening diseases. Fungal endophytes are receiving increasing attention by natural product chemists due to the diverse and structurally unprecedented compounds, which make them interesting candidates for drug discovery. The present study evaluates the antibacterial activity of ethyl acetate extract of the endophytic fungus Alternaria alternata VN3 on multi-resistant clinical strains of Staphylococcus aureus and Pseudomonas aeruginosa, as well as its cytotoxicity on MCF-7 and MDA MB-231 tumour cell lines of breast cancer. The maximum inhibition zone of 21.4±0.07 mm and 21.5±0.25 mm was observed for S. aureus strain 10 and P. aeruginosa strain 2, respectively. The ethyl acetate extract showed minimal inhibitory concentration ranging from 100 to 900 μg/ml for S. aureus and P. aeruginosa. Further, the ethyl acetate extract of A. alternata VN3 exhibited moderate anticancer activity against MCF-7 and MDA MB-231 cell lines. At 30 μg/ml the cell viability was decreased to 75.5% and 71.8% for MCF-7 and MDA MB-231 cells, respectively. These results clearly indicate that the metabolites of A. alternata VN3 are a potential source for production of new drugs.","PeriodicalId":37816,"journal":{"name":"Biological Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/biolet-2015-0002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67268088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Aspergillus-fermented Jatropha curcas seed cake: proximate composition and effects on biochemical indices in Wistar rats 曲霉发酵麻疯树籽饼:近似成分及其对Wistar大鼠生化指标的影响

Biological Letters Pub Date : 2014-06-01 DOI: 10.1515/biolet-2015-0004

S. Faoziyat, A. Amina, A. Adeyemo, Rihanat Bukola Muhammed, Abiodun Muinat Sulaiman, A. Aliyu, O. Adeyemi

{"title":"Aspergillus-fermented Jatropha curcas seed cake: proximate composition and effects on biochemical indices in Wistar rats","authors":"S. Faoziyat, A. Amina, A. Adeyemo, Rihanat Bukola Muhammed, Abiodun Muinat Sulaiman, A. Aliyu, O. Adeyemi","doi":"10.1515/biolet-2015-0004","DOIUrl":"https://doi.org/10.1515/biolet-2015-0004","url":null,"abstract":"Abstract This study evaluated Jatropha curcas seed cake fermented by Aspergillus niger for use as a potential source of protein in animal feed production. Wistar rats were randomly assigned to 4 groups (A–D, of 3 rats each) and fed different protein-rich diets for 4 weeks. Group 1 (control) was fed with soybean as a protein source, while Groups 2, 3, and 4 were given feeds supplemented instead with Aspergillus-fermented J. curcas, unfermented J. curcas, and a mix of Aspergillus-fermented J. curcas and soybean (1:1), respectively. At the end of the experiment, rats were sacrificed, and their serum and vital organs were harvested for further analyses. Proximate analyses of the various diet combinations showed significant (P < 0.05) variations in crude protein, crude fibre, ether extract, and ash content. Enzyme assays (alanine transaminase, aspartate transaminase, and alkaline phosphatase) in rat serum and tissue homogenates indicate that the detoxification of J. curcas kernel cake by A. niger fermentation is viable and promising. Body weight generally did not differ significantly between the groups, but all rats put on weight in week 1 (Group 2 most strongly). The initial weight gain was followed by a slight decreasing trend in all groups in weeks 2–4, probably due to an adaptation mechanism. One rat fed with the unfermented cake (Group 3) died in week 2, confirming that the cake is not safe for direct consumption until it is processed. Our data support further use of Aspergillus-fermented J. curcas as an alternative protein source in animal feed preparation.","PeriodicalId":37816,"journal":{"name":"Biological Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/biolet-2015-0004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67268120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Mites (Acari, Mesostigmata) from rock cracks and crevices in rock labirynths in the Stołowe Mountains National Park (SW Poland) Stołowe山脉国家公园(波兰西南部)岩石裂缝和岩石迷宫裂缝中的螨虫(蜱螨，中刺目)

Biological Letters Pub Date : 2014-06-01 DOI: 10.1515/biolet-2015-0006

Jacek Kamczyc, M. Skorupski

引用次数: 5

Possibilities of using soil microarthropods, with emphasis on mites (Arachnida, Acari, Mesostigmata), in assessment of successional stages in a reclaimed coal mine dump (Pszów, S Poland) 利用土壤微节肢动物，特别是螨类(蛛形纲、蜱螨、中形螨)评价复垦煤矿排土场演替阶段的可能性(Pszów，波兰南部)

Biological Letters Pub Date : 2014-06-01 DOI: 10.1515/biolet-2015-0003

G. Madej, M. Kozub

{"title":"Possibilities of using soil microarthropods, with emphasis on mites (Arachnida, Acari, Mesostigmata), in assessment of successional stages in a reclaimed coal mine dump (Pszów, S Poland)","authors":"G. Madej, M. Kozub","doi":"10.1515/biolet-2015-0003","DOIUrl":"https://doi.org/10.1515/biolet-2015-0003","url":null,"abstract":"Abstract The usefulness of 2 methods for biomonitoring of the effects of land rehabilitation were compared in Pszów (Upper Silesian Coal Basin, south of Poland). Thirty-one species of mesostigmatid mites were collected from 3 study plots representing different stages of restoration of the mine dump Wrzosy in Pszów and community structure of the mites was analysed. There was a general trend for mesostigmatid species richness, diversity, and density to increase with the development of vegetation. The dominant early successional mesostigmatid species was the phoretic Hypoapis claviger. During this study, 4616 specimens of soil microarthropods were extracted in total. They were classified according to the Biological Soil Quality Index (QBS). We tested the sensitivity and usefulness of this index for monitoring of soil quality and found its good relationship with successional stages in the reclaimed mine dump. Thus the QBS index seems to be an efficient index for monitoring the effects of restoration in mine dumps. It is a simpler, quicker, and cheaper bioindicator method than the earlier method based on community structure analysis of mesostigmatid mites.","PeriodicalId":37816,"journal":{"name":"Biological Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/biolet-2015-0003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67268205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Filter paper inhibits in vitro protocorm-like body formation in hybrid Cymbidium and reduces synseed germination, but buffers the negative impact of antibiotics 滤纸抑制杂交大花蕙兰体外原球茎样体形成，降低合子萌发，但缓冲抗生素的负面影响

Biological Letters Pub Date : 2014-01-01 DOI: 10.1515/biolet-2015-0005

J. A. Teixeira da Silva

{"title":"Filter paper inhibits in vitro protocorm-like body formation in hybrid Cymbidium and reduces synseed germination, but buffers the negative impact of antibiotics","authors":"J. A. Teixeira da Silva","doi":"10.1515/biolet-2015-0005","DOIUrl":"https://doi.org/10.1515/biolet-2015-0005","url":null,"abstract":"Abstract Only few studies in the plant tissue culture literature have examined the impact of filter paper on in vitro plant organogenesis. In this study, using a model plant, hybrid Cymbidium Twilight Moon ‘Day Light’, the impact of a single or double layer of Advantec #2 or Whatman #1 filter paper on new protocorm-like body (neo-PLB) formation on Teixeira Cymbidium (TC) medium was examined for half-PLBs (transgenic and non-transgenic), PLB-derived transverse thin cell layers (tTCLs), and PLB synseeds. In addition, the response of half-PLBs or tTCLs to two antibiotics (kanamycin and cefotaxime, commonly used in plant genetic transformation studies) was investigated either directly on gelled medium or on filter paper-overlaid medium. Filter paper negatively affected most growth and developmental parameters of all the explants tested, both transgenic and non-transgenic. A double sheet of filter paper had a significantly (P ≤ 0.05) more negative impact than a single sheet, relative to the control values (i.e., no filter paper). Kanamycin inhibited neo-PLB formation on TC medium, the negative impact being greater on a single layer than on a double layer of filter paper, i.e., filter paper buffered the growth-inhibiting characteristics of kanamycin. Up to 100 mg/l, cefotaxime showed no apparent negative effects on neo-PLBs formation and growth, although hyperhydricity was observed when filter paper was not used.","PeriodicalId":37816,"journal":{"name":"Biological Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/biolet-2015-0005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67268932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0