`Candidatus Liberibacter asiaticus´ titers in citrus and acquisition rates by Diaphorina citri are decreased by higher temperature

Lope, Silvio Aparecido and Lui, Fernanda and Martins, Elaine Cristina and Fassini, Camila and Sousa Timossi, Michele Do Carmo and Barbosa, José Carlos and Beattie, Andrew (2013). `Candidatus Liberibacter asiaticus´ titers in citrus and acquisition rates by Diaphorina citri are decreased by higher temperature. "Plant Disease", v. 97 (n. 12); pp. 1563-1570. ISSN 0191-2917. https://doi.org/10.1094/PDIS-11-12-1031-RE.

Description

Title: `Candidatus Liberibacter asiaticus´ titers in citrus and acquisition rates by Diaphorina citri are decreased by higher temperature
Author/s:
  • Lope, Silvio Aparecido
  • Lui, Fernanda
  • Martins, Elaine Cristina
  • Fassini, Camila
  • Sousa Timossi, Michele Do Carmo
  • Barbosa, José Carlos
  • Beattie, Andrew
Item Type: Article
Título de Revista/Publicación: Plant Disease
Date: December 2013
ISSN: 0191-2917
Volume: 97
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

`Candidatus Liberibacter asiaticus´ is the most prevalent Liberibacter sp. associated with huanglongbing (HLB) in Brazil. Within São Paulo state (SP), HLB has spread more rapidly to and reached higher incidence in regions with relatively mild (cooler) summer temperatures. This suggests that climate can influence disease spread and severity. ?Ca. L. asiaticus? titers on soft, immature leaves from infected ?Valencia? sweet orange plants exposed to different temperature regimes and adult Diaphorina citri fed for 48 h on these plants for ?Ca. L. asiaticus? acquisition were determined by quantitative polymerase chain reaction in two experiments. The first experiment included plants with three levels of infection, three incubation periods (IPs), and air temperatures favorable (14.6 to 28°C) and unfavorable (24 to 38°C) to ?Ca. L. asiaticus?. The second included plants with severe late-stage infections, 10 IPs (based on 3-day intervals over 27 days), and three air temperature regimes (12 to 24, 18 to 30, and 24 to 38°C). Overall, ?Ca. L. asiaticus? titers and the percentages of ?Ca. L. asiaticus?-positive psyllids were lower in plants maintained at the warmer temperature regime (24 to 38°C) than in plants maintained in the cooler regimes. The results suggest that the lower incidence and slower spread of ?Ca. L. asiaticus? to warmer regions of SP are related to the influence of ambient temperatures on titers of ?Ca. L. asiaticus? in leaves.

More information

Item ID: 35006
DC Identifier: http://oa.upm.es/35006/
OAI Identifier: oai:oa.upm.es:35006
DOI: 10.1094/PDIS-11-12-1031-RE
Official URL: http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-11-12-1031-RE
Deposited by: Memoria Investigacion
Deposited on: 05 May 2015 12:43
Last Modified: 05 May 2015 12:43
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