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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/4485

Title: Caracterização de fungos do género Stemphylium associados a pomóideas em Portugal
Other Titles: Characterization of fungi of the genus Stemphylium associated to pome fruits in Portugal
Authors: Silva, Sandra da Conceição Liz da
Advisor: Lima, Arlindo
Mota, Mariana Gomes
Keywords: pome fruits
brown spot
genetic diversity
morphologic characteristics
Pleospora
Stemphylium
Issue Date: 2011
Publisher: ISA/UTL
Citation: Silva, Sandra da Conceição Liz da - Caracterização de fungos do género Stemphylium associados a pomóideas em Portugal. Lisboa: ISA, 2011
Abstract: Brown spot of pear, associated to Pleospora allii/Stemphylium vesicarium, is economically important in pear production in Europe and was detected, in 1996, in Portugal. The causal agent is known to share similar morphological characteristics with other fungi in the genus, namely S. botryosum known as a storage fungus, making the identification between them quite difficult. With the aim to contribute for a better knowledge of brown spot in pears, the pathogens involved in this disease and its presence in other fruit trees, we studied, from 30 Stemphylium monosporics isolates obtained from apples and pear fruits, and pears leaves, from Portugal, the optimal grow temperature, cultural, morphologic and biometric characteristics from anamorphs and/or teleomorphs, the time required for ascospore prodution and phylogenetic relationships, inferred from ITS and gpd sequence data. The optimum growth temperature stood between 22.5º C and 27.5º C, the ratio between length and width ranged from 1.38 to 2.38. The number of days until mature ascospores were produced ranged between 10 and 54 days. The gpd fragments of 28 isolates clustered with S. vesicarium from NCBI bank and the whole data allowed to identify 29 isolates as S. vesicarium
Description: Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/4485
Appears in Collections:BISA - Dissertações de Mestrado / Master Thesis

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