In silico analysis of phytohormone metabolism and communication pathways in citrus transcriptome

Genetics and Molecular Biology

Vera Quecini²  Gisele A.m. Torres¹  Vicente E. De Rosa Jr²  Marcos A. Gimenes¹  Jeanne B. De M. Machado¹  Antonio V. De O. Figueira¹  Vagner Benedito¹  Maria Luisa P.n. Targon¹  Mariângela Cristofani-yaly¹ 

[1] ,Instituto Agronômico de Campinas Centro de Pesquisa e Desenvolvimento de Recursos Genéticos Campinas SP ,Brazil

关键词: defense responses;    development;    plant growth regulators;   

DOI  :  10.1590/S1415-47572007000500002

来源: SciELO

【 摘 要 】

Plant hormones play a crucial role in integrating endogenous and exogenous signals and in determining developmental responses to form the plant body throughout its life cycle. In citrus species, several economically important processes are controlled by phytohormones, including seed germination, secondary growth, fruit abscission and ripening. Integrative genomics is a powerful tool for linking newly researched organisms, such as tropical woody species, to functional studies already carried out on established model organisms. Based on gene orthology analyses and expression patterns, we searched the Citrus Genome Sequencing Consortium (CitEST) database for Expressed Sequence Tags (EST) consensus sequences sharing similarity to known components of hormone metabolism and signaling pathways in model species. More than 600 homologs of functionally characterized hormone metabolism and signal transduction members from model species were identified in citrus, allowing us to propose a framework for phytohormone signaling mechanisms in citrus. A number of components from hormone-related metabolic pathways were absent in citrus, suggesting the presence of distinct metabolic pathways. Our results demonstrated the power of comparative genomics between model systems and economically important crop species to elucidate several aspects of plant physiology and metabolism.

【 授权许可】

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