Fungos do solo da Antártida: produção de metabólitos secundários bioativos contra Xanthomonas citri subsp. citri
The citrus canker, caused by Xanthomonas citri subsp. citri, is a disease that attacks all species and varieties of commercially important citrus. The Brazil as one of the world's leading producers of orange and have a favorable climate for the development of bacteria suffer significant economi...
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| Format: | Bachelor Thesis |
| Language: | Portuguese |
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Universidade Estadual Paulista (Unesp)
2016
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| Online Access: | http://hdl.handle.net/11449/156046 http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-09-28/000890136.pdf |
| Summary: | The citrus canker, caused by Xanthomonas citri subsp. citri, is a disease that attacks all species and varieties of commercially important citrus. The Brazil as one of the world's leading producers of orange and have a favorable climate for the development of bacteria suffer significant economic losses because of citrus canker. Currently, the control of the disease includes the use of spraying of trees with bactericidal compounds containing copper and eradication of infected plants. However, these measures cause a large loss in quantity of trees and environmental impact due to accumulation of copper in the environment. Thus, it becomes necessary to search for sustainable ways to combat citrus canker. In this context, secondary metabolites has aroused great interest as alternatives to chemicals, with, in many studies, great potential for application in pest control in agriculture. It is suspected that as yet unknown secondary metabolites can be produced by fungi that live in extreme environments such as Antarctica. This project aims to investigate the potential activity of secondary metabolites produced by fungi isolated from soil samples under iron bar at Deception Island in Antarctica, against the bacterium Xanthomonas citri subsp. citri, which causes citrus canker in citrus fruits. After extraction of intracellular and extracellular metabolites by chemicals, they were tested by REMA to prove the bioactivity of the extract in bacterial development. Lastly, we obtained 44 extracts, of which 7 presented significant bioactivity against Xanthomonas citri subsp. citri O cancro cítrico, causado pela bactéria Xanthomonas citri subsp. citri, é uma doença que ataca todas as espécies e variedades de citros de importância comercial. O Brasil por ser um dos principais produtores mundiais de laranja e por apresentar clima favorável para o desenvolvimento da bactéria sofre perdas econômicas significativas por causa do cancro cítrico. Atualmente o controle da doença inclui o uso de pulverizações das árvores com compostos ... |
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