scholarly journals Etelänversosurma (Sphaeropsis sapinea) – uusi uhka männyille Suomessa?

2021 ◽  
Vol 2021 (0) ◽  
Author(s):  
Eeva Terhonen
Keyword(s):  
Sphaeropsis Sapinea

scholarly journals A comparative characteristic of fungal communities associated with Ips acuminatus in different regions of Ukraine

2019 ◽  
pp. 118-128
Author(s):  
Kateryna Davydenko
Keyword(s):  
Bark Beetle ◽  
Fungal Community ◽  
Bark Beetles ◽  
Diversity Index ◽  
Pathogenic Fungi ◽  
Pine Forest ◽  
Comparative Characteristic ◽  
Ophiostomatoid Fungi ◽  
Decay Fungi ◽  
Sphaeropsis Sapinea

Pine bark beetles are typically associated with complexes of fungi that could reveal different functional interaction. Thus, previously nonaggressive bark beetle Ips acuminatus is considering now to be among the most serious pests of pine forest in Ukraine and other European countries and vectored fungal community is very important to assess total harm of this bark beetle. The aim of this study was to reveal the vectored fungal community associated with the pine engraver beetle, I. acuminatus with special emphasis on pathogenic fungi for further evaluation of harm bark-beetle - fungi association for Ukrainian forest. In total, 288 adult beetles were collected from Scots pine trees at six different sites through Ukraine. DNA sequencing as fungal culturing from all beetles resulted in 1681 isolates and amplicons representing 42 fungal taxa. NCBI BLAST search revealed that the overall fungal community was composed of 94 species, of which 80.85% were Ascomycota, followed by Basidiomycota and unidentified fungal group, which accounted for 10.6% and 8.5 % of the total sequences, respectively. Among these, the most commonly detected fungi for pooling dataset were Sphaeropsis sapinea (23.6%), Cladosporium pini-ponderosae (19.44%), Ophiostoma ips (19.1%), Ophiostoma canum (19.1%) and Cladobotryum mycophilum (18.06%). In the pooled dataset of isolates and amplicons for each site, Shannon diversity indices ranged between 1.9 and 2.9 while Simpson diversity index varied between 0.69 and 0.89 indicating rich species diversity. In total twelve ophiostomatoid species were detected. All ophiostomatoid fungi were showing varying degrees of virulence and O. minus was the most aggressive fungus in previous studies. It is concluded that I. acuminatus vectors a species-rich fungal community including pathogens such as ophiostomatoid fungi, Sphaeropsis sapinea, different needle pathogens and wood decay fungi that seems to be very important for the assessment of threat of I. acuminatus to the pine forest in Ukraine.

scholarly journals Life cycle of the pathogenic fungus Sphaeropsis sapinea Dyko & Sutton

2003 ◽  
pp. 141-156 ◽  
Author(s):  
Tanja Milijasevic
Keyword(s):  
Life Cycle ◽  
Pathogenic Fungus ◽  
Critical Time ◽  
Parasitic Fungus ◽  
Male And Female ◽  
Time Of Infection ◽  
Sphaeropsis Sapinea ◽  
Second Year ◽  
Female Flowers

The study of the parasitic fungus Sphaeropsis sapinea life cycle shows that the conidia disseminate most massively during the period April-May, i. e. during the critical time of infection, but also during the period June-August. Infection can occur through the buds in the spring, before their flushing, but also in the summer of the year of their development. Infection occurs most frequently through the bark of the young shoots, because of which they die while needle infections mostly lead to the so-called localized infections. Both male and female flowers can be infected, as well as the current-year and second-year cones. In some cases this fungus can behave as a latent parasite, i. e. endophyte.

scholarly journals Multiple gene genealogies and microsatellite markers reflect relationships between morphotypes of Sphaeropsis sapinea and distinguish a new species of Diplodia

2003 ◽  
Vol 107 (5) ◽  
pp. 557-566 ◽  
Author(s):  
Juanita De Wet ◽  
Treena Burgess ◽  
Bernard Slippers ◽  
Oliver Preisig ◽  
Brenda D. Wingfield ◽  
...  
Keyword(s):  
New Species ◽  
Microsatellite Markers ◽  
Multiple Gene ◽  
Sphaeropsis Sapinea ◽  
A New Species

Double-stranded RNA and associated virulence in South African isolates of Sphaeropsis sapinea

1998 ◽  
Vol 76 (8) ◽  
pp. 1412-1417 ◽  
Author(s):  
Emma T. Steenkamp ◽  
Brenda D. Wingfield ◽  
Wijnand J. Swart ◽  
Michael J. Wingfield
Keyword(s):  
South African ◽  
Double Stranded Rna ◽  
Sphaeropsis Sapinea

Ultrastructural Aspects of the Conidium Cell Wall of Sphaeropsis sapinea

Mycologia ◽  
1986 ◽  
Vol 78 (6) ◽  
pp. 960 ◽  
Author(s):  
Wang Cheng-guo ◽  
Robert A. Blanchette ◽  
Marguerita A. Palmer
Keyword(s):  
Cell Wall ◽  
Sphaeropsis Sapinea

scholarly journals Latent Infection of Austrian and Scots Pine Tissues by Sphaeropsis sapinea

Plant Disease ◽  
2001 ◽  
Vol 85 (10) ◽  
pp. 1107-1112 ◽  
Author(s):  
J. Flowers ◽  
E. Nuckles ◽  
J. Hartman ◽  
L. Vaillancourt
Keyword(s):  
Disease Management ◽  
Scots Pine ◽  
Latent Infection ◽  
Pine Seedlings ◽  
Pine Trees ◽  
Latently Infected ◽  
Sphaeropsis Sapinea ◽  
Male Flowers ◽  
Blight Disease ◽  
Apparently Healthy

This study documents latent infection of Austrian and Scots pine tissues by Sphaeropsis sapinea, the causal agent of Sphaeropsis tip blight disease. Symptomless shoots from diseased or apparently healthy Austrian and Scots pine trees were cultured and analyzed for the presence of S. sapinea. Nearly half of the sampled Austrian and Scots pine trees that appeared to be completely healthy had detectable latent S. sapinea infections. More than half of the symptomless shoots on visibly diseased Austrian and Scots pine trees were also latently infected with S. sapinea. S. sapinea was isolated from symptomless shoot stems, needles, buds, immature cones, and male flowers. In symptomless infected shoots, the fungus was primarily associated with the bark and phloem tissues. Six isolates of S. sapinea from symptomless Austrian and Scots pine shoot tissues were pathogenic on Austrian pine seedlings in the greenhouse. The presence of S. sapinea in symptomless tissues of tip blight-diseased trees has important implications for disease management.

Characterisation of the ‘C’ morphotype of the pine pathogen Sphaeropsis sapinea

2002 ◽  
Vol 161 (1-3) ◽  
pp. 181-188 ◽  
Author(s):  
Juanita de Wet ◽  
Michael J Wingfield ◽  
Teresa Coutinho ◽  
Brenda D Wingfield
Keyword(s):  
Sphaeropsis Sapinea
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