Understanding the development of orange tree symptoms following HLB infection: plant nutritional status and physiological traits

• Grant number: 18/14893-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: September 01, 2018
• End date: August 31, 2020
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Dirceu de Mattos Junior
• Grantee: Jefferson Rangel da Silva
• Host 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: 15/13572-8 - Nutritional status and strategic citrus diseases: integrating bases for the management of production, AP.TEM

Abstract

Citrus industry contributes to the highest volume of Brazilian fruit production, obtained with high orchard productivity, as a result of the adoption of technologies such as planting densification, fertilization and irrigation. However, the increase in the incidence of phytosanitary problems, mainly huanglongbing (HLB), pressure production costs and reduce the sustainability of the sector. The causal agent of HLB is a phloem-restricted bacterium (Candidatus Liberibacter) that impairs water and nutrient absorption and causes economic death of the plant, as it affects the phloem. Despite the advances in fertilizer management, little was discussed about the relationship between nutritional status and severity of citrus diseases such as HLB. Thus, it is necessary to characterize processes between the nutritional status and the predisposition of citrus plants to the infection and severity of HLB that help in the elucidation of the plant-pathogen relationship. The research proposal deals with the nutritional management, biochemical responses (carbohydrate metabolism and oxidative stress) and physiological, and biomass partitioning that may result in the greater tolerance of the plants to the disease.

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)

DA SILVA, JEFFERSON RANGEL; DE ALVARENGA, FAUSTO VEIGA; BOARETTO, RODRIGO MARCELLI; SPOTTI LOPES, JOAO ROBERTO; QUAGGIO, JOSE ANTONIO; DELLA COLETTA FILHO, HELVECIO; MATTOS JR, DIRCEU. Following the effects of micronutrient supply in HLB-infected trees: plant responses and `Candidatus Liberibacter asiaticus' acquisition by the Asian citrus psyllid. TROPICAL PLANT PATHOLOGY, v. 45, n. 6, SI, JUN 2020. (18/14893-0, 15/13572-8)

DA SILVA, JEFFERSON RANGEL; DE ALVARENGA, FAUSTO VEIGA; BOARETTO, RODRIGO MARCELLI; SPOTTI LOPES, JOAO ROBERTO; QUAGGIO, JOSE ANTONIO; DELLA COLETTA FILHO, HELVECIO; MATTOS JR, DIRCEU. Following the effects of micronutrient supply in HLB-infected trees: plant responses and 'Candidatus Liberibacter asiaticus' acquisition by the Asian citrus psyllid. ROPICAL PLANT PATHOLOG, v. 45, n. 6, p. 14-pg., 2020-06-03. (18/14893-0, 15/13572-8)