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Evaluation of expression of candidate genes in interference RNA (iRNA)system in Diaphorina citri (Kuwayama) (Hemiptera: Psyllidae), vector of citrus Huanglongbing

Grant number: 14/03925-8
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): July 01, 2014
Effective date (End): June 30, 2015
Field of knowledge:Agronomical Sciences - Agronomy - Plant Health
Principal Investigator:Marcos Antonio Machado
Grantee:Diogo Manzano Galdeano
Supervisor: Bryce W. Falk
Host Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
Research place: University of California, Davis (UC Davis), United States  
Associated to the scholarship:13/02138-0 - Evaluation of expression of candidate genes in interference RNA (iRNA) system in Diaphorina citri (Kuwayama) (Hemiptera: Psyllidae), vector of citrus huanglongbing., BP.DR


Diaphorina citri (Kuwayama) is one of most important vectors of citrus diseases. It transmits the bacteria Candidatus Liberibacter americanus and Candidatus Liberibacter asiaticus, the causal agents of citrus huanglongbing (HLB). The management of HLB in Brazil is based on the use of healthy young plants from protected nurseries, eradication of infected plants, and chemical control of the vector. However, the intense and continuous use of insecticides is not sustainable, not only due to the financial costs but mainly because the environmental losses. New technologies, such as gene silencing by RNA interference (iRNA), have been used as new approaches to the control of pests and vectors aiming to reduce the high costs of developing new molecules, and make their control more efficient and specific. Recent studies have shown effective results using RNAi to silence important genes to the maintenance of cellular homeostasis and synthesis of chitin. This study aims to analyze the regulation of gene expression, mortality and/or phenotypic changes of Diaphorina citri in response to RNAi targeted genes. Coding region of target genes were selected and amplified by RT-PCR, their sequences were confirmed for the subsequent production of double-stranded RNAs (dsRNA) by in vitro transcription. Tests will be performed in vivo corporation with different concentrations of dsRNA via insect feeding. Changes in the quantitative and temporal expression of target genes will be confirmed by quantitative PCR. (AU)

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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)
GALDEANO, DIOGO MANZANO; BRETON, MICHELE CLAIRE; SPOTTI LOPES, JOAO ROBERTO; FALK, BRYCE W.; MACHADO, MARCOS ANTONIO. Oral delivery of double-stranded RNAs induces mortality in nymphs and adults of the Asian citrus psyllid, Diaphorina citri. PLoS One, v. 12, n. 3, . (14/03925-8, 08/57909-2, 13/02138-0)

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