FUNGI ASSOCIATED TO BARK LESIONS OF Eucalyptus globulus STEMS IN PLANTATIONS FROM URUGUAY
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidade Federal de Viçosa
2009
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| _version_ | 1876450438641876992 |
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| author | Raquel Alonso |
| author_facet | Raquel Alonso |
| contents | FUNGI ASSOCIATED TO BARK LESIONS OF Eucalyptus globulus STEMS IN PLANTATIONS FROM URUGUAY Raquel Alonso Susana Tiscornia Acelino Couto Alfenas Lina Bettucci Agrociencias Fungi Eucalyptus Botryosphaeria Trees with stem bark lesions are frequently observed in Eucalyptus globulus Labill. plantations, particularly in the central west region of Uruguay. These lesions constitute a problem for trunk decortications at harvest and they also facilitate the access of fungi that could cause wood decay. Seven, three and oneyear-old plantations, located at three sites in close proximity were selected. Four types of trunk lesions were present in trees regardless the age of plantation and more than one type was found in each plantation. The aim of this study was to investigate the fungal composition associated with these lesions and compare them to healthy tissues and try to find out the origin of these symptoms. Another purpose was to elucidate the real role of the fungi considered pathogens by means of experimental inoculations. Segments from lesions and healthy tissues yielded 897 fungal isolates belonging to 32 taxa, 681 isolates from bark lesions and 216 from healthy tissues. Both healthy and symptomatic tissues showed similar fungal species composition, but with differences in frequencies of colonization. Cytospora eucalypticola Van der Westhuizen, Botryosphaeria spp., Pestalotiopsis guepinii (Desm.) Stey. and Penicillium spp. were the dominant species isolated. As symptoms were not reproduced after experimental inoculation with Botryosphaeria ribis Grossenb. & Duggar and B. eucalyptorum Crous, & M.J. Wingf, it could be suggested that these lesions were originated by unfavorable environmental conditions. The frost that occurred for several days out of season and flooding may have been involved in the development of bark lesion. 2009 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48815852001 en http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.4 Vol.33 |
| format | Artículo científico |
| id | redalyc_48815852001 |
| institution | Redalyc |
| language | en |
| publishDate | 2009 |
| publisher | Universidade Federal de Viçosa |
| spellingShingle | FUNGI ASSOCIATED TO BARK LESIONS OF Eucalyptus globulus STEMS IN PLANTATIONS FROM URUGUAY Raquel Alonso Agrociencias Fungi Eucalyptus Botryosphaeria FUNGI ASSOCIATED TO BARK LESIONS OF Eucalyptus globulus STEMS IN PLANTATIONS FROM URUGUAY Raquel Alonso Susana Tiscornia Acelino Couto Alfenas Lina Bettucci Agrociencias Fungi Eucalyptus Botryosphaeria Trees with stem bark lesions are frequently observed in Eucalyptus globulus Labill. plantations, particularly in the central west region of Uruguay. These lesions constitute a problem for trunk decortications at harvest and they also facilitate the access of fungi that could cause wood decay. Seven, three and oneyear-old plantations, located at three sites in close proximity were selected. Four types of trunk lesions were present in trees regardless the age of plantation and more than one type was found in each plantation. The aim of this study was to investigate the fungal composition associated with these lesions and compare them to healthy tissues and try to find out the origin of these symptoms. Another purpose was to elucidate the real role of the fungi considered pathogens by means of experimental inoculations. Segments from lesions and healthy tissues yielded 897 fungal isolates belonging to 32 taxa, 681 isolates from bark lesions and 216 from healthy tissues. Both healthy and symptomatic tissues showed similar fungal species composition, but with differences in frequencies of colonization. Cytospora eucalypticola Van der Westhuizen, Botryosphaeria spp., Pestalotiopsis guepinii (Desm.) Stey. and Penicillium spp. were the dominant species isolated. As symptoms were not reproduced after experimental inoculation with Botryosphaeria ribis Grossenb. & Duggar and B. eucalyptorum Crous, & M.J. Wingf, it could be suggested that these lesions were originated by unfavorable environmental conditions. The frost that occurred for several days out of season and flooding may have been involved in the development of bark lesion. 2009 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48815852001 en http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.4 Vol.33 |
| title | FUNGI ASSOCIATED TO BARK LESIONS OF Eucalyptus globulus STEMS IN PLANTATIONS FROM URUGUAY |
| topic | Agrociencias Fungi Eucalyptus Botryosphaeria |
| url | https://www.redalyc.org/articulo.oa?id=48815852001 |