Understanding the complexity of disease-climate interactions for rice bacterial panicle blight under tropical conditions

PLoS One. 2021 May 26;16(5):e0252061. doi: 10.1371/journal.pone.0252061. eCollection 2021.

Abstract

Bacterial panicle blight (BPB) caused by Burkholderia glumae is one of the main concerns for rice production in the Americas since bacterial infection can interfere with the grain-filling process and under severe conditions can result in high sterility. B. glumae has been detected in several rice-growing areas of Colombia and other countries of Central and Andean regions in Latin America, although evidence of its involvement in decreasing yield under these conditions is lacking. Analysis of different parameters in trials established in three rice-growing areas showed that, despite BPB presence, severity did not explain the sterility observed in fields. PCR tests for B. glumae confirmed low infection in all sites and genotypes, only 21.4% of the analyzed samples were positive for B. glumae. Climate parameters showed that Montería and Saldaña registered maximum temperature above 34°C, minimum temperature above 23°C, and Relative Humidity above 80%, conditions that favor the invasion model described for this pathogen in Asia. Our study found that in Colombia, minimum temperature above 23°C during 10 days after flowering is the condition that correlates with disease incidence. Therefore, this correlation, and the fact that Montería and Saldaña had a higher level of infected samples according to PCR tests, high minimum temperature, but not maximum temperature, seems to be determinant for B. glumae colonization under studied field conditions. This knowledge is a solid base line to design strategies for disease control, and is also a key element for breeders to develop strategies aimed to decrease the effect of B. glumae and high night-temperature on rice yield under tropical conditions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Burkholderia / classification
  • Burkholderia / genetics*
  • Colombia
  • Oryza / growth & development*
  • Oryza / microbiology
  • Plant Diseases / genetics
  • Plant Diseases / microbiology*
  • Tropical Climate*
  • Virulence / genetics

Supplementary concepts

  • Burkholderia glumae

Grants and funding

This research was supported by the Colombian Ministry of Science (formerly COLCIENCIAS), contract 556-2013, and the Global Rice Science Partnership (GRiSP). JR-V is supported by the Climate Services for Resilient Development (CSRD)-United States Agency for International Development (USAID) Award# AID-BFS-G-11-00002-10 toward the CGIAR Fund (MTO 069018), and the Climate Change, Agriculture and Food Security (CCAFS) project Agroclimas (http://bit.ly/2i3V0Nh). CCAFS is carried out with support from CGIAR Fund donors and through bilateral funding agreements (https://ccafs.cgiar.org/donors). For details, please visit https://ccafs.cgiar.org/donors.