Mycological research最新文献_第6页

Mycological research Pub Date : 2009-09-01 DOI: 10.1016/j.mycres.2009.08.011

引用次数: 0

Characterization of three endophytic, indole-3-acetic acid-producing yeasts occurring in Populus trees 杨树中三种内生吲哚-3-乙酸产酵母的特性研究

Mycological research Pub Date : 2009-09-01 DOI: 10.1016/j.mycres.2009.06.001

Gang Xin , Dean Glawe , Sharon L. Doty

{"title":"Characterization of three endophytic, indole-3-acetic acid-producing yeasts occurring in Populus trees","authors":"Gang Xin , Dean Glawe , Sharon L. Doty","doi":"10.1016/j.mycres.2009.06.001","DOIUrl":"10.1016/j.mycres.2009.06.001","url":null,"abstract":"<div>Three endophytic yeast, one isolated from stems of wild cottonwood (Populus trichocarpa), two from stems of hybrid poplar (P. trichocarpa  Populus deltoides), were characterized by analyzing three ribosomal genes, the small subunit (18S), internal transcribed spacer (ITS), and D1/D2 region of the large subunit (26S). Phenotypic characteristics of the yeast isolates were also obtained using a commercial yeast identification kit and used for assisting the species identification. The isolate from wild cottonwood was identified to be closest to species Rhodotorula graminis. The two isolates from hybrid poplar were identified to be species Rhodotorula mucilaginosa. In addition, the three yeast isolates were observed to be able to produce indole-3-acetic acid (IAA), a phytohormone which can promote plant growth, when incubated with l-tryptophan. To our knowledge, the yeast strains presented in this study were the first endophytic yeast strains isolated from species of Populus.</div>","PeriodicalId":19045,"journal":{"name":"Mycological research","volume":"113 9","pages":"Pages 973-980"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mycres.2009.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28255100","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: 139

A histidine kinase PmHHK1 regulates polar growth, sporulation and cell wall composition in the dimorphic fungus Penicillium marneffei 组氨酸激酶PmHHK1调节马尔尼菲青霉的极性生长、产孢和细胞壁组成

Mycological research Pub Date : 2009-09-01 DOI: 10.1016/j.mycres.2009.03.006

Feng Wang , Juhong Tao , Zhen Qian , Song You , Hui Dong , Huan Shen , Xiaoxun Chen , Shengrong Tang , Shuangxi Ren

引用次数: 30

Fungi from the roots of the common terrestrial orchid Gymnadenia conopsea 从普通陆生兰花根中提取的真菌

Mycological research Pub Date : 2009-09-01 DOI: 10.1016/j.mycres.2009.05.002

Christiane Stark , Wiesław Babik , Walter Durka

{"title":"Fungi from the roots of the common terrestrial orchid Gymnadenia conopsea","authors":"Christiane Stark , Wiesław Babik , Walter Durka","doi":"10.1016/j.mycres.2009.05.002","DOIUrl":"10.1016/j.mycres.2009.05.002","url":null,"abstract":"<div>The fungal community associated with the terrestrial photosynthetic orchid Gymnadenia conopsea was characterized through PCR-amplification directly from root extracted DNA and cloning of the PCR products. Six populations in two geographically distinct regions in Germany were investigated. New ITS-primers amplifying a wide taxonomic range including Basidiomycetes and Ascomycetes revealed a high taxonomic and ecological diversity of fungal associates, including typical orchid mycorrhizas of the Tulasnellaceae and Ceratobasidiaceae as well as several ectomycorrhizal taxa of the Pezizales. The wide spectrum of potential mycorrhizal partners may contribute to this orchid's ability to colonize different habitat types with their characteristic microbial communities. The fungal community of G. conopsea showed a clear spatial structure. With 43 % shared taxa the species composition of the two regions showed only little overlap. Regardless of regions, populations were highly variable concerning taxon richness, varying between 5 and 14 taxa per population. The spatial structure and the continuous presence of mycorrhizal taxa on the one hand and the low specificity towards certain fungal taxa on the other hand suggest that the fungal community associated with G. conopsea is determined by multiple factors. In this context, germination as well as pronounced morphological and genetic differentiation within G. conopsea deserve attention as potential factors affecting the composition of the fungal community.</div>","PeriodicalId":19045,"journal":{"name":"Mycological research","volume":"113 9","pages":"Pages 952-959"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mycres.2009.05.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28212062","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: 87

Morphological differences of symbiotic fungi Smittium culisetae (Harpellales: Legeriomycetaceae) in different Dipteran hosts 共生真菌Smittium culisetae (Harpellales: legiomycetaceae)在不同双翅目寄主中的形态差异

Mycological research Pub Date : 2009-09-01 DOI: 10.1016/j.mycres.2009.05.004

Svjetlana Vojvodic , John W. McCreadie

{"title":"Morphological differences of symbiotic fungi Smittium culisetae (Harpellales: Legeriomycetaceae) in different Dipteran hosts","authors":"Svjetlana Vojvodic , John W. McCreadie","doi":"10.1016/j.mycres.2009.05.004","DOIUrl":"10.1016/j.mycres.2009.05.004","url":null,"abstract":"<div>Harpellales (Legeriomycetaceae, Zygomycota) or ‘trichomycetes’ are fungi that inhabit the digestive tracts of arthropods such as insects, millipedes, and crustaceans. In the current study we examined changes in 5 morphological characters of Smittium culisetae (Harpellales: Legeriomycetaceae) between the two dipteran (mosquito, black fly) hosts reared under 3 different temperatures (17, 22, 30°C). Both host and temperature had a pervasive effect on the linear dimension of trichospores, their generative cells and hyphae width. At 30°C the mean size of all 5 morphological characters were consistently larger in fungus taken from the mosquito host than from the black fly host. At 17°C and 22°C, however, there were no consistent patterns. The effect of host was so pronounced that it could be accurately determined which host S. culisetae colonised based on differences in linear morphology. Such changes in fungal morphology between hosts have important ramifications for the morphologically based taxonomy of this group.</div>","PeriodicalId":19045,"journal":{"name":"Mycological research","volume":"113 9","pages":"Pages 967-972"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mycres.2009.05.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28316649","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: 7

Cryptic speciation and community structure of Herpotrichia juniperi, the causal agent of brown felt blight of conifers 针叶树褐枯病病原菌刺槐隐种及群落结构研究

Mycological research Pub Date : 2009-08-01 DOI: 10.1016/j.mycres.2009.04.008

Miriam Schneider , Christoph R. Grünig , Ottmar Holdenrieder , Thomas N. Sieber

{"title":"Cryptic speciation and community structure of Herpotrichia juniperi, the causal agent of brown felt blight of conifers","authors":"Miriam Schneider , Christoph R. Grünig , Ottmar Holdenrieder , Thomas N. Sieber","doi":"10.1016/j.mycres.2009.04.008","DOIUrl":"10.1016/j.mycres.2009.04.008","url":null,"abstract":"<div>Conifer twigs showing brown felt blight were collected along 100-m long transects at the timberline in the Swiss Alps and single-hyphal-tip cultures were prepared. Forty-seven of the sequenced 48 strains were Herpotrichia juniperi based on sequence comparisons of the internal transcribed spacers (ITS). A non-sporulating strain was tentatively identified as another, undescribed Herpotrichia species. Herpotrichia coulteri was not isolated. Most strains were from Juniperus communis var. saxatilis, the rest from Picea abies and Pinus mugo. Each twig was colonized by a different genotype as revealed by ISSR-PCR fingerprinting. More than one clone was present on some needles and twigs. Thus, importance of vegetative mycelial growth for dispersal seems to be limited to the spread of the disease to twigs of the same tree or of immediately adjacent trees, and, consequently, dispersal occurs mainly by ascospores. The H. juniperi strains could be assigned to five distinct groups based on the ISSR-PCR data. The strains from P. abies formed one of these groups but the other groups did not correlate with either host, transect or position along the transects. Multi-locus analysis based on β-tubulin, elongation factor 1-α and ITS sequences confirmed the subdivision into five groups. Population differentiation among groups was distinct with NST values varying between 0.545 and 0.895. H. juniperi seems to be composed of several cryptic species, one of them specific to P. abies.</div>","PeriodicalId":19045,"journal":{"name":"Mycological research","volume":"113 8","pages":"Pages 887-896"},"PeriodicalIF":0.0,"publicationDate":"2009-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mycres.2009.04.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28181549","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: 17

Mycological Research News1 真菌学研究新闻1

Mycological research Pub Date : 2009-08-01 DOI: 10.1016/j.mycres.2009.07.002

引用次数: 0

Dictionary of the Fungi 真菌词典

Mycological research Pub Date : 2009-08-01 DOI: 10.1016/j.mycres.2009.07.003

引用次数: 824

Otidea subterranea sp. nov.: Otidea goes below ground 地下奥氏藻。新：奥氏藻深入地下。

Mycological research Pub Date : 2009-08-01 DOI: 10.1016/j.mycres.2009.04.006

Matthew E. Smith , Rosanne A. Healy

引用次数: 17

Production of extracellular enzymes by different isolates of Pochonia chlamydosporia 不同分离株衣孢波氏菌胞外酶的生产

Mycological research Pub Date : 2009-08-01 DOI: 10.1016/j.mycres.2009.04.005

Ivânia Esteves , Belkis Peteira , Simon D. Atkins , Naresh Magan , Brian Kerry

{"title":"Production of extracellular enzymes by different isolates of Pochonia chlamydosporia","authors":"Ivânia Esteves , Belkis Peteira , Simon D. Atkins , Naresh Magan , Brian Kerry","doi":"10.1016/j.mycres.2009.04.005","DOIUrl":"10.1016/j.mycres.2009.04.005","url":null,"abstract":"<div>For the first time, the specific activities of chitinases, esterases, lipases and a serine protease (VCP1) produced by different isolates of the nematophagous fungus Pochonia chlamydosporia were quantified and compared. The isolates were grown for different time periods in a minimal liquid medium or media supplemented with 1 % chitin, 0.2 % gelatin or 2 % olive oil. Enzyme-specific activities were quantified in filtered culture supernatants using chromogenic p-nitrophenyl substrates (for chitinases, lipases and esterases) and a p-nitroanilide substrate (to measure the activity of the proteinase VCP1). Additionally, information on parasitic growth (nematode egg parasitism) and saprotrophic growth (plant rhizosphere colonisation) was collected. Results showed that the production of extracellular enzymes was influenced by the type of medium (p  <0.05), and significant differences were found between isolates (p  <0.001). However, no significant relationships were found between enzyme activities and parasitic or saprotrophic growth using Kendall's coefficient of concordance or Spearman rank correlation coefficient. The results provided new information about enzyme production in P. chlamydosporia and suggested that the mechanisms which regulate the trophic switch in this fungus are complex and dependent on several factors.</div>","PeriodicalId":19045,"journal":{"name":"Mycological research","volume":"113 8","pages":"Pages 867-876"},"PeriodicalIF":0.0,"publicationDate":"2009-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.mycres.2009.04.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28157859","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: 71