Impact of Temperature Changes on the Occurrence of Grain Rot Caused by Burkholderia species
2024
Choi, S.Y. | Geum, C.O. | Park, H.S. | Kim, S.H. | Chung, H.J. | Kim, S.M. | Lee, Y.H.
Bacterial grain rot (BGR) caused by Burkholderia glumae is a serious threat to rice production and quality. Burkholderia gladioli and Burkholderia plantarii have also been frequently isolated from rice panicles exhibiting Grain rot. The disease by the Burkholderia species are becoming prevalent due to the prolonged hot and humid conditions during the heading stage. However, the effects of the changing environments on the incidence of GR by the Burkholderia species remain to be explored. In this study, we inoculated rice panicles at the heading stage with the three Burkholderia species under different temperatures (25℃, 3 0℃, and 35℃) and evaluated disease incidences in both indoors and field conditions. B. glumae induced high disease incidences at the elevated temperatures in both conditions, whereas B. gladioli and B. plantarii showed no significant variations with temperature changes. Further analysis indicated that the increased incidence caused by B. glumae at the elevated temperature is linked to higher toxoflavin production and motility. The results of this study suggest that rising temperature due to climate change during the rice heading stage could potentially increase the incidence of BGR caused by B. glumae. This study provides insights for preparing for the outbreak of BGR.
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