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Global gene expression of Candidatus Liberibacter asiaticus in different stages of development of the vector (Diaphorina citri).

Grant number: 15/13971-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2016
Effective date (End): July 31, 2017
Field of knowledge:Agronomical Sciences - Agronomy - Plant Health
Principal researcher:Marcos Antonio Machado
Grantee:Inaiara de Souza Pacheco
Home Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
Associated research grant:08/57909-2 - Genomic platforms applied to citrus breeding, AP.TEM


Citrus and it's sub products are one of the most important commodities of Brazil, however, since the discovery of Huanglongbing (HLB), in 2004, the sector has been suffering dramatic loses of production. The causal agents of this disease are gram-negative phloem-limited bacteria of Liberibacter genus. These bacteria spread systemically throughout the plant causing leaves and fruit abscission and promoting the plant death in a few years. Two species of bacteria occurs in Brazil: Candidatus Liberibacter asiaticus, which is present in all countries affected by HBL, with exception of African continent, and Candidatus Liberibacer americanus, endemic to Brazil. Candidatus Liberibacter africanus is another causal agent of HLB that is present in African continent only. In vitro isolation and culture of these species have been unsuccessful so far, which difficult their study. Psysilids insects are responsible for transmission of these bacteria and Diaphorina citri Kuwayama is the principal vector in America. Many studies have been developed with the aim of elucidating aspects of these pathosystem, primarily on plant-pathogen interactions and plant-insect interactions. However, studies on interaction of the pathogen and its insect vector are rare and recent. Thus, the objectives of this proposal is to identifiy differentially expressed genes of Ca. Liberibacter asiaticus in different development stages of D. citri in order to understand the genetic mechanism of interaction between the bacteria and the insect vector.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PACHECO, INAIARA DE SOUZA; GALDEANO, DIOGO MANZANO; SPOTTI LOPES, JOAO ROBERTO; MACHADO, MARCOS ANTONIO. Development on Infected Citrus over Generations Increases Vector Infection by `CandidatusLiberibacter Asiaticus inDiaphorina citri'. INSECTS, v. 11, n. 8 AUG 2020. Web of Science Citations: 0.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
. Aspectos moleculares da interação entre Diaphorina citri e Candidatus Liberibacter asiaticus. 2019. 172 f. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia.

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