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4篇 您的检索式:作者名="Michael J.Wingfield"
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1Taxonomy and pathogenicity of Ceratocystis species on Eucalyptus trees in South China, including C. chinaeucensis sp. nov.显示文摘Commercial plantations of Eucalyptus species have been established in South China,especially during the past 20 years,to meet the needs of a rapidly growing national economy.As part of a survey of fungal diseases affecting Eucalyptus species in South China,Ceratocystis species were collected from Eucalyptus plantations in the GuangDong Province.The aims of this study were to identify these Ceratocystis isolates and to test their pathogenicity to Eucalyptus.The most aggressive isolates were also used to screen different species and clones of Eucalyptus for susceptibility to infection under field conditions.The fungi were identified based on morphology and through comparisons of DNA sequence data of the ITS,partialβ-tubulin and TEF-1αgene regions.Morphological and DNA sequence comparisons showed that isolates collected from Chinese Eucalyptus plantations represent two species,C.acaciivora in the C.fimbriata s.l.species complex and a previously undescribed species belonging to the C.moniliformis s.l.species complex,for which the name C.chinaeucensis sp.nov.is provided.In pathogenicity trials,both C.acaciivora and C.chinaeucensis gave rise to lesions on wounded Eucalyptus trees,and the former fungus was most pathogenic.Differences were also observed in the responses of different Eucalyptus clones to inoculation and this could be useful in reducing disease,if C.acaciivora should emerge as a pathogen in the future.ShuaiFei Chen Marelize Van Wyk Jolanda Roux Michael J.Wingfield YaoJian Xie XuDong Zhou 2013Fungal Diversity2013,,1:2
2Quambalaria species associated with eucalypt diseases in southern China显示文摘The genus Quambalaria includes several important pathogens of species of Eucalyptus and Corymbia, mainly causing leaf and shoot blight. Recently,extensive shoot and leaf dieback and stem cankers suspected to be Quambalaria diseases have been found on young Eucalyptus urophylla ? E. grandis trees in Guangdong and Hainan Provinces. The occurrence of Quambalaria species and their association with eucalypt hosts within China needs to be investigated for tree diseases management. The isolates from the diseased samples were identified based on their morphological structures and phylogenetic analyses with DNA sequence data for the internal transcribed spacer region and large ribosome subunit RNA of the nuclear r DNA. This work revealed that three species of Quambalaria were present: Quambalaria pitereka from Corymbia citriodora,Q. eucalypti from E. urophylla ? E. grandis, both isolated from young eucalypt leaves and shoots in Guangdong Province, and Quambalaria simpsonii, which was isolated from stem cankers of E. urophylla ? E. grandis at four different sites across Guangdong and Hainan Provinces.These results confirmed that Quambalaria agents were associated with the diseases occurring on eucalypt hosts in South China. This is the first report of Q. eucalypti in Asia and the first report of Q. simpsonii in China on Eucalyptus trees.Shuaifei CHEN Qianli LIU Guoqing LI Michael J.WINGFIELD 2017Frontiers of Agricultural Science and Engineering2017,4,4:2
3Mate-recognition and species boundaries in the ascomycetes显示文摘Reproductive gene evolution is commonly invoked as a source of reproductive isolation during speciation.This possibility has not been adequately explored in the Ascomycota,the most species-rich fungal phylum.The mechanisms of mate-recognition in this group are relatively simple:a“mating type”locus determines reproductive mode and sexual compatibility,and two pheromone/receptor pairs control sexual attraction.However,ascomycete reproductive genes can experience unique and interesting evolutionary forces,which could lead to rapid divergence.In this review,we examine the mechanisms of sexual interaction in ascomycetes and explore current evidence as to whether these mechanisms allow for species-specificity in mate-recognition.We discuss the evolutionary forces that can drive reproductive gene divergence,how these may apply in the world of ascomycetes,and their possible consequences for speciation.Simon H.Martin Emma T.Steenkamp Michael J.Wingfield Brenda D.Wingfield 2013Fungal Diversity2013,,1:1
4松材线虫在明尼苏达州和威斯康星州对松树的致病性显示文摘在美国已经提到松材线虫(Bursaphelenchus xylophilus)对多种针叶树苗的致病性,但却很少提及它可能杀死已经定植的林木,特别是北美的本地松。我们的课题是要确定接种松材线虫对明尼苏达州和威斯康星州森林中的本地北美短叶松(Finus banksiana),Michael J.Wingfield 黎少梅 1990广东林业科技1990,,1:0
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