In Bazhong City,Sichuan Province,China,top dieback symptoms were found on many pine trees(Pinus thunbergii Parl).The tips of old needles first turned grayish-green and then developed into brown bands in the field.Phyl...In Bazhong City,Sichuan Province,China,top dieback symptoms were found on many pine trees(Pinus thunbergii Parl).The tips of old needles first turned grayish-green and then developed into brown bands in the field.Phylogenetic analysis of concatenated ITS and EF1-αindicated the pathogen of this dieback disease as Diplodia neojuniperi.Additionally,effects of temperature,pH and medium on the mycelial growth were also characterized.The most favorable temperature and pH level for mycelial growth are 25°C and 8,respectively.The optimal medium for mycelial growth is PDA medium.To our knowledge,this is the first report of D.neojuniperi causes Diplodia top dieback on Pinus thunbergii.Our results provide fundamental information for monitoring and preventing such disease in the future.展开更多
The diversity of Botryosphaeriaceae species associated with“Botryosphaeria dieback”of grapevine was investigated in 18 vineyards in Sardinia,Italy.Lasiodiplodia isolates obtained from different woody hosts including...The diversity of Botryosphaeriaceae species associated with“Botryosphaeria dieback”of grapevine was investigated in 18 vineyards in Sardinia,Italy.Lasiodiplodia isolates obtained from different woody hosts including holm oak,sweet orange and broom bush in Italy,Algeria and Tunisia were also characterized.Morphological and cultural characteristics as well as ITS and EF1-αsequence data were used to identify the fungal isolates.Forty-eight botryosphaeriaceous isolates were obtained from 113 symptomatic grapevine samples,from which ten species were identified.Diplodia seriata was the dominant species(25%of isolates),followed by Neofusicoccum parvum(21.7%).Two species,Diplodia olivarum and D.africana are reported for the first time on grapevine.In addition,two new species namely Lasiodiplodia mediterranea sp.nov.from grapevine,holm oak and sweet orange and Lasiodiplodia exigua sp.nov.from broom bush are described.In artificial inoculation experiments conducted on excised green grapevine shoots and lignified canes as well as holm oak seedlings,L.mediterranea was shown to be an aggressive pathogen.展开更多
基金supported by the National Natural Science Foundation of China 31800543(X.D).
文摘In Bazhong City,Sichuan Province,China,top dieback symptoms were found on many pine trees(Pinus thunbergii Parl).The tips of old needles first turned grayish-green and then developed into brown bands in the field.Phylogenetic analysis of concatenated ITS and EF1-αindicated the pathogen of this dieback disease as Diplodia neojuniperi.Additionally,effects of temperature,pH and medium on the mycelial growth were also characterized.The most favorable temperature and pH level for mycelial growth are 25°C and 8,respectively.The optimal medium for mycelial growth is PDA medium.To our knowledge,this is the first report of D.neojuniperi causes Diplodia top dieback on Pinus thunbergii.Our results provide fundamental information for monitoring and preventing such disease in the future.
基金Antonio Deidda and Bruno Scanu gratefully acknowledge Sardinia Regional Government for the financial support of the PhD scholarship and research grant,respectively(P.O.R.Sardegna F.S.E.Operational Programme of the Autonomous Region of Sardinia,European Social Fund 2007–2013-Axis IV Human Resources,Objective l.3,Line of Activity l.3.1.).
文摘The diversity of Botryosphaeriaceae species associated with“Botryosphaeria dieback”of grapevine was investigated in 18 vineyards in Sardinia,Italy.Lasiodiplodia isolates obtained from different woody hosts including holm oak,sweet orange and broom bush in Italy,Algeria and Tunisia were also characterized.Morphological and cultural characteristics as well as ITS and EF1-αsequence data were used to identify the fungal isolates.Forty-eight botryosphaeriaceous isolates were obtained from 113 symptomatic grapevine samples,from which ten species were identified.Diplodia seriata was the dominant species(25%of isolates),followed by Neofusicoccum parvum(21.7%).Two species,Diplodia olivarum and D.africana are reported for the first time on grapevine.In addition,two new species namely Lasiodiplodia mediterranea sp.nov.from grapevine,holm oak and sweet orange and Lasiodiplodia exigua sp.nov.from broom bush are described.In artificial inoculation experiments conducted on excised green grapevine shoots and lignified canes as well as holm oak seedlings,L.mediterranea was shown to be an aggressive pathogen.