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52. 14. mednarodna IUFRO konferenca o lesnih trohnobah in predstavitev evropskega projekta o jesenovem ožigu in holandski brestovi bolezni (LIFE+ ELMIAS) na Švedskem avgusta 2018Ana Brglez, Nikica Ogris, 2018, popular article Keywords: gozdovi, Varstvo gozdov, IUFRO, trohnobne glive, Heterobasidion spp., LIFE+ ELMIAS, jesenov ožig, holandska brestova bolezen, Hymenoscyphus fraxineus, Chalara fraxinea, Ophiostoma ulmi, Ophiostoma novo-ulmi
Published in DiRROS: 28.07.2020; Views: 1424; Downloads: 828
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53. Laboratorij za varstvo gozdov v letu 2018Barbara Piškur, Nikica Ogris, Andreja Kavčič, Maarten De Groot, Špela Jagodic, Zina Devetak, Ana Brglez, Simon Zidar, Dušan Jurc, 2019, popular article Keywords: gozdovi, Varstvo gozdov, laboratorij, letno poročilo, programi preiskav
Published in DiRROS: 28.07.2020; Views: 1446; Downloads: 1070
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54. Poročilo o preskusu št.: LVG 2020-064 : opis vzorca: : Thuja occidentalis, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: Seiridium cardinaleAna Brglez, Andreja Kavčič, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, ameriški klek, Thuja occidentalis, žuželka, krasnik
Published in DiRROS: 13.07.2020; Views: 1234; Downloads: 0 |
55. The effect of Eutypella parasitica on the wood decay of three maple speciesAna Brglez, Barbara Piškur, Miha Humar, Jožica Gričar, Nikica Ogris, 2020, original scientific article Abstract: Eutypella parasitica R.W. Davidson & R.C. Lorenz is the causative agent of Eutypella canker of maple, a destructive disease of maples in Europe and North America. The fungus E. parasitica is known to cause wood stain and decay. However, it is not known how effectively it decomposes the wood of the most widespread maple species in Europe. Wood samples of Acer pseudoplatanus L., A. platanoides L., and A. campestre L. were exposed to four isolates of E. parasitica and nine other fungal species for comparison, according to the modified EN 113 standard. After 15 weeks of incubation, mass loss and microscopical analysis of samples showed evidence of colonization and different wood decay potentials among fungal species. A highly significant positive correlation was found between mass loss and moisture content for all fungal species. Similarly, the measured cell wall thickness correlated well with the calculated mass loss of the samples. On average, the fungal species caused the lowest mass loss in A. pseudoplatanus (10.0%) and the highest in A. campestre (12.6%) samples. Among the samples exposed to E. parasitica isolates, the highest mass loss was recorded in A. pseudoplatanus (6.6%). Statistical analysis showed significant differences in mass loss and moisture content between different E. parasitica isolates. Based on the results of staining, we discuss the type of decay caused by E. parasitica. Although E. parasitica isolates caused smaller mass loss of samples compared to other more effective decay species, we should not disregard its capability of degrading maple wood. Because E. parasitica usually infects the lower portion of the trunk, which is the largest and most valuable part of the tree, any damage can cause significant economic and resource loss.
Keywords: wood decay, mass loss, moisture content, mini-block test, decay test, Acer spp., Eutypella parasitica, fungi, light microscopy, scanning electron microscopy
Published in DiRROS: 13.07.2020; Views: 1772; Downloads: 1218
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56. Eutypella parasitica and other frequently isolated fungi in wood of dead branches of young Sycamore Maple (Acer pseudoplatanus) in SloveniaAna Brglez, Barbara Piškur, Nikica Ogris, 2020, original scientific article Abstract: Eutypella parasitica R.W. Davidson and R.C. Lorenz is the causative agent of Eutypella canker of maple, a destructive disease of maples in Europe and North America. The fungus E. parasitica infects the trunk through a branch stub or bark wound. Because the fungal community may have an impact on infection and colonization by E. parasitica, the composition of fungi colonizing wood of dead branches of sycamore maple (Acer pseudoplatanus L.) was investigated in five sampling sites in Slovenia. Forty samples from each sampling site were collected between the November 2017 and March 2018 period. Isolations were made from the wood in the outer part of dead branches and from discoloured wood in the trunk that originated from a dead branch. Pure cultures were divided into morphotypes, and one representative culture per morphotype was selected for further molecular identification. From a total of 2700 cultured subsamples, 1744 fungal cultures were obtained, which were grouped into 212 morphotypes. The investigated samples were colonized by a broad spectrum of fungi. The most frequently isolated species were Eutypa maura (Fr.) Sacc., Eutypa sp. Tul. and C. Tul., Fusarium avenaceum (Fr.) Sacc., Neocucurbitaria acerina Wanas., Camporesi, E.B.G. Jones and K.D. Hyde and E. parasitica. In this study, we distinguished species diversity and the fungal community. There were no significant differences in the diversity of fungal species between the five sampling sites, and branch thickness did not prove to be a statistically significant factor in fungal species diversity. Nevertheless, relatively low Jaccard similarity index values suggested possible differences in the fungal communities from different sampling sites. This was confirmed by an analysis of similarities, which showed that the isolated fungal community distinctly differed between the five sampling sites and between the different isolation sources. Eutypella parasitica was isolated from all five investigated sampling sites, although Eutypella cankers were observed in only three sampling sites, indicating the possibility of asymptomatic infection.
Keywords: fungal composition, invasive species, diversity, fungal communities, molecular identification, frequencies, Jaccard similarity index, Eutypella parasitica, analysis of similarities, colonization
Published in DiRROS: 26.05.2020; Views: 2054; Downloads: 1214
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59. Poročilo o preskusu št.: LVG 2019-222 : opis vzorca: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: gliva, bakterijaBarbara Piškur, Nikica Ogris, Ana Brglez, Špela Jagodic, Zina Devetak, Peter Smolnikar, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, gorski javor, Acer pseudoplatanus, gliva, bolezen, Verticillium dahliae, verticilijska uvelost listavcev, Fusarium sambucinum, Eutypa maura, Peroneutypa scoparia
Published in DiRROS: 31.01.2020; Views: 1662; Downloads: 82 |
60. Poročilo o preskusu št.: LVG 2019-221 : opis vzorca: LVG2019/00170: Acer pseudoplatanus, veja (z listi ali brez) ali poganjki, LVG2019/00734: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: GlivaNikica Ogris, Barbara Piškur, Špela Jagodic, Zina Devetak, Ana Brglez, Peter Smolnikar, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, gorski javor, Acer pseudoplatanus, Prosthecium platanoidis, Eutypa sp., glive, Xylaria longipes, Fusarium sp., kompleksna bolezen, suša, sušni stres, podnebne spremembe
Published in DiRROS: 31.01.2020; Views: 1745; Downloads: 82 |
