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Nutritional status and strategic citrus diseases: integrating bases for the management of production

Grant number: 15/13572-8
Support type:Research Projects - Thematic Grants
Duration: September 01, 2016 - August 31, 2021
Field of knowledge:Agronomical Sciences - Agronomy - Crop Science
Principal Investigator:Dirceu de Mattos Junior
Grantee:Dirceu de Mattos Junior
Home Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
Co-Principal Investigators:Helvecio Della Coletta Filho ; Renato Beozzo Bassanezi
Assoc. researchers:Fernando Alves de Azevedo ; Fernando Cesar Bachiega Zambrosi ; Francisco André Ossamu Tanaka ; Franklin Behlau ; Geraldo José da Silva Junior ; Jose Antonio Quaggio ; Lilian Amorim ; Renato Beozzo Bassanezi ; Rodrigo Marcelli Boaretto ; Sérgio Alves de Carvalho
Associated grant(s):17/02925-2 - Multi user equipment approved in grant 2015/13572-8: growth chamber, AP.EMU
17/02927-5 - Multi-User Equipment appoved in grant 2015/13572-8: infrared gas analizer (IRGA), AP.EMU
Associated scholarship(s):18/14893-0 - Understanding the development of orange tree symptoms following HLB infection: plant nutritional status and physiological traits, BP.PD
17/22478-0 - Effects of calcium on predisposition of leaves and citrus petals to phytopathogens: anatomy/ultrastructure of infected tissue, BP.DR
17/10460-0 - Severity of alternaria brown spot on Murcott tangor leaves with different levels of calcium and nitrogen, BP.IC


The citrus industry contributes with the volume of fruits produced in Brazilian, obtained with high productivity of orchards, a result of the adoption of technologies such as planting density, fertilization and irrigation. However, the incidence of phytosanitary problems that affect citrus farming has caused the increase of fruit production costs, which leads to a decrease in the sector's sustainability. Despite advances in the management of nutrients, little has been discussed about the relationship between nutritional status of plants and severity of such citrus diseases. Thus, it is necessary to characterize processes and relationships between nutritional status and the susceptibility of citrus plants to major diseases for the Brazilian citrus industry (citrus canker, huanglongbing, PFD, black and brown spot), and establish rational orchard management strategies that minimize the losses caused by these diseases to the quantity and quality of local production. The research proposal, supported by long-term field results and other developed by the research team, is organized in studies carried out in the field, for evaluation of plant responses to differential nutrient management with N, Ca and Mg, and some micronutrients on structure and integrity of tissues, biochemical responses (carbohydrate metabolism and oxidative stress) and physiological, and biomass partitioning that can result in increased tolerance and / or resistance of plants in different rootstocks to stresses and reduce the willingness of these to the progress of diseases in the citrus orchards. These studies are supported by other developed at greenhouses and laboratories. The definition of best management practices to minimize impacts of fertilization of these diseases can prolong the life of the orchards, and also contribute to reducing the use of pesticides and their environmental impacts. (AU)

Scientific publications (4)
(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, JUN 2020. Web of Science Citations: 0.
HIPPLER, FRANZ W. R.; DOVIS, VERONICA L.; BOARETTO, RODRIGO M.; QUAGGIO, JOSE A.; AZEVEDO, RICARDO A.; WILLIAMS, LORRAINE E.; MATTOS-, JR., DIRCEU. Photosynthesis is differently regulated during and after copper-induced nutritional stress in citrus trees. PHYSIOLOGIA PLANTARUM, v. 163, n. 3, SI, p. 399-413, JUL 2018. Web of Science Citations: 1.
RIEGER HIPPLER, FRANZ WALTER; PETENA, GUILHERME; BOARETTO, RODRIGO MARCELLI; QUAGGIO, JOSE ANTONIO; AZEVEDO, RICARDO ANTUNES; MATTOS-, JR., DIRCEU. Mechanisms of copper stress alleviation in Citrus trees after metal uptake by leaves or roots. Environmental Science and Pollution Research, v. 25, n. 13, SI, p. 13134-13146, MAY 2018. Web of Science Citations: 5.
RIEGER HIPPLER, FRANZ WALTER; BOARETTO, RODRIGO MARCELLI; DOVIS, VERONICA LORENA; QUAGGIO, JOSE ANTONIO; AZEVEDO, RICARDO ANTUNES; MATTOS-, JR., DIRCEU. Oxidative stress induced by Cu nutritional disorders in Citrus depends on nitrogen and calcium availability. SCIENTIFIC REPORTS, v. 8, JAN 26 2018. Web of Science Citations: 10.

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