Eucalyptus ESTs involved in mechanisms against plant pathogens and environmental stresses
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Data
2010-12-01
Autores
Rosa, Daniel Dias [UNESP]
Furtado, Edson Luiz [UNESP]
Boava, Leonardo Pires [UNESP]
Marino, Celso Luis [UNESP]
Mori, Edson Seizo [UNESP]
Guerrini, Iraê Amaral [UNESP]
Veline, Edivaldo Domingues [UNESP]
Wilcken, Carlos Frederico [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Grupo Paulista de Fitopatologia
Resumo
A cultura do Eucalipto tem importância econômica muito elevada no Brasil e vem sofrendo inúmeros ataques de patógenos, além de essa cultura estar sujeita aos inúmeros estresses ambientais. A resistência e sobrevivência desta cultura frente às circunstâncias ambientais desfavoráveis, e ataques de pragas e doenças, revelaram que o Eucalipto apresenta um sistema de defesa evoluído e altamente eficiente. Aqui nós apresentamos os resultados obtidos no projeto do genoma de ESTs do Eucalyptus (FORESTs). Agrupando as seqüências de cDNA expressas (ESTs) obtidas pelo projeto, montou-se grupos (contigs) de seqüências similares provenientes de cada biblioteca de cDNA induzidas e não induzidas por agentes estressantes, identificou-se os grupos de seqüências de cDNA similares a outras moléculas já conhecidas, como moléculas de plantas-sinalizadoras, fitoalexinas e biossíntese de vias de lignina, proteínas-RP e supostos genes correspondendo às enzimas envolvidas na detoxificação de moléculas de oxigênio reativo. Apresentamos também, considerações gerais sobre os mecanismos de defesa do Eucalipto contra o estresse biótico e abiótico. Estas informações são de extraordinário valor para a produção de Eucalipto e ajudaram no futuro a direcionar programas de melhoramento do Eucalipto, visando assim obter plantas com melhor resistência contra os patógenos e estresses ambientais.
Eucalypt plantation has high economical importance in Brazil; however, it has been attacked by various pathogens under different environmental stress conditions. Disease resistance and survival under unfavorable environmental conditions have revealed that the eucalypt has developed highly efficient defense systems. Here we show the results of the Eucalyptus ESTs Genome Project (FORESTs). Using the expressed sequence tags (ESTs) obtained by the Project, contigs of similar sequences from each cDNA library induced and not induced by stress agents were formed, and cDNA sequences similar to other already known molecules, such as plant-signaling molecules, phytoalexins, lignin biosynthesis pathways, PR-proteins and putative genes corresponding to enzymes involved in the detoxification of reactive oxygen species, were identified. We also present general considerations about the mechanisms of Eucalyptus defense against biotic and abiotic stresses. These data are of extreme importance for future eucalypt breeding programs aimed at developing plants with enhanced resistance against pathogens and environmental stresses.
Eucalypt plantation has high economical importance in Brazil; however, it has been attacked by various pathogens under different environmental stress conditions. Disease resistance and survival under unfavorable environmental conditions have revealed that the eucalypt has developed highly efficient defense systems. Here we show the results of the Eucalyptus ESTs Genome Project (FORESTs). Using the expressed sequence tags (ESTs) obtained by the Project, contigs of similar sequences from each cDNA library induced and not induced by stress agents were formed, and cDNA sequences similar to other already known molecules, such as plant-signaling molecules, phytoalexins, lignin biosynthesis pathways, PR-proteins and putative genes corresponding to enzymes involved in the detoxification of reactive oxygen species, were identified. We also present general considerations about the mechanisms of Eucalyptus defense against biotic and abiotic stresses. These data are of extreme importance for future eucalypt breeding programs aimed at developing plants with enhanced resistance against pathogens and environmental stresses.
Descrição
Palavras-chave
Eucalyptus, resistência, fitoalexinas, Proteínas-RP, Eucalyptus, resistance, phytoalexins, PR-proteins
Como citar
Summa Phytopathologica. Grupo Paulista de Fitopatologia, v. 36, n. 4, p. 282-290, 2010.