Dissertation > Excellent graduate degree dissertation topics show

Taxonomy of Cytospora Species in Northeast China

Author: ZhangYuBo
Tutor: TianChengMing
School: Beijing Forestry University
Course: Forest Protection
Keywords: Cytospora Northeast China phylogeny taxonomy
CLC: Q949.32
Type: Master's thesis
Year: 2013
Downloads: 13
Quote: 0
Read: Download Dissertation

Abstract


The genus Cytospora Ehrenberg. can cause trees rot as pathogens. In this study, via microscopical morphology, histopathological and observation of cultural characteristics,149Cytospora specimen on15different hosts collected from23areas in Heilongjiang, Jilin, Liaoning and eastern Inner Mongolia were observed. Combining with the phylogenetic tree construted with rDNA-ITS sequence, Cytospora species in northeast China were analyzed, and the classification basis and the interspecific phylogenetic relationships were discussed. The results are as follows:(1) Morphological observation for Cytospora specimen collected from northeast China shows8asexual species and5sexual groups morphologicaly. The asexual species were identified as Cytospora pruinosa (Fr.) Sacc, C. leucostoma (Pers.) Sacc, C. nivea Fuckel., C. chrysosperma (Pers.) Fr., C. carbonacea Fr. and C. sacculus (Schwein.) Gvrit. Cytospora sp.1(hosts are Ulmus sp.), Cvtospora sp.2,(hosts are Rose davurica); the sexual groups were identified as Leucostoma niveum (Hoffm.) Hohn., Leucostoma persoonii (Nitschke) Hohn., Valsa sp.2(hosts are Rose davurica), Leucostoma sp.(hosts are Ulmus sp.)and Valsa sp.1(hosts are Ulmus sp.).(2) Morphological and phylogenetic analysis of Cytospora shows that the undivided-or multi-locules, the number of ostioles, the size of conidia, and the appeatance of centrum column and black zone line are the basis for classification of Cytospora. While other features such as the form of locules and osticles, stromata morphology and the development degree of entostroma are unstable. The features of maxe-like or rose block-like locules and the shape of ostioles can be various even on the same speciman so that they can not be used for classification. Meanwhile the development degree of entostroma of C. leucostoma can be variant when they resided on different hosts.(3) In the phylogenetic tree, the same Cytospora species gethered in the same clade with effective support rate; the clades of Cytospora species belong to the same sexual genus were togethered closer. There is a good correlationship between morphological species and phylogenetic clades.(4) The specifity of Cytospora species to hosts is not strict. The the same Cytospora fungi can be observed on different hosts, and the differernt Cytospora species can reside on the same host paint.

Related Dissertations

  1. Taxonomy of Parasitic Nemaotodes From Some Wild Mammals and Population Genetic Structure Analysis of Anisakis Pegreffii,Q953
  2. Research on Agricultural Product International Competitiveness of Northeast China,F327
  3. Recognition of Partial Soil Series in Jianghan Plain,S155
  4. The Biological Characterization and Molecular Phylogenetic Analyses of Penicillium Spp. That Causing the Mold Fruit of Citrus,S436.66
  5. Research on Soil Characteristics and Taxonomic Classification at Huoditang Forest Region in the Qinling Mountains,S714
  6. Variation of Bacterial Community in Subalpine Meadow Soil Affected Different Snow Thickness,S812.2
  7. Phylogenetic Study of Hedysarum in China Based on ITS Sequences of Nuclear Ribosomal and TRNL-F Region of Cpdna,Q941
  8. The Complete Mitochondrial Genome Sequence of Vietnamella Dabieshanensis and Paegniodes Cupulaturs (Insecta: Ephemeroptera),Q963
  9. Study on Performance Evaluation of Technology Innovation of the Three Northeastern Provinces,F124.3
  10. Empirical Research on the Relationship of Top Manager’s Compensation and Company’s Performance of State-Owned Listed Enterprise in Northeastern Old Industrial Base,F272.92;F224
  11. A Research on the Quality of XBRL Internet Financial Reporting,F232
  12. XBRL Taxonomy of Financial Reporting Quality Evaluation,F232
  13. Northeast Empirical Consumption Structure of Urban Residents Research and Comparative Analysis,F224
  14. Analyze the Feature of Agrarian Relations and Class Relations in Northeast China Countryside during the Puppet Manchu Regime Period,K265.6
  15. Study of Taxonomy on the Grylloidea in Jilin Province,Q969.26
  16. Research of Genes Encoding 12S rRNA and Cyt-b and Molecular Evolution for Alaudidae in Inner Mongolia,Q958
  17. Analysis of Evolutionary Rate in Protein Coding Gene of Human Genome,Q987
  18. The Emotion of Northeast Agrestic Oil Painting Is Analytical,J213
  19. Shanxi Businessmen’ Commercial in the Northeast of China in the Qing Dynasty,K249
  20. Investigations on Mango Thrips in Hainan Island and Phylogenetic Researches Based on mtDNA CO Ⅰ Gene Sequences,S433
  21. Impact of Land Cover on Snow Identification from MODIS Images,P426.635

CLC: > Biological Sciences > Botany > The plant taxonomy (system botany ) > Spore plants (implicit flowering plants) > Fungus > Fungi door
© 2012 www.DissertationTopic.Net  Mobile