AI Article Synopsis
- Prophages are key components in bacterial genomes, contributing to genetic diversity and pathogenicity.
- In this study, researchers analyzed a specific prophage gene in 'Candidatus Liberibacter asiaticus' associated with citrus Huanglongbing (HLB) in two regions of China.
- There was a significant difference in the frequency of the prophage terminase gene between Guangdong (15.8%) and Yunnan (97.4%), indicating possible environmental influences, but some strains from both regions showed genetic similarities, suggesting a shared recent origin.
Article Abstract
Prophages are important genetic elements of bacterial genomes and are involved in lateral gene transfer, pathogenicity, environmental adaptations, and interstrain genetic variability. In this study, the sequence of a prophage terminase gene of 'Candidatus Liberibacter asiaticus', a bacterium associated with citrus Huanglongbing (HLB), was selected as a molecular marker to assess the genetic variation in two 'Ca. L. asiaticus' populations from geographically distinct provinces (Guangdong and Yunnan) in China. The frequency of the prophage terminase gene was 15.8% (19/120) in Guangdong (altitude <500 m) and 97.4% (38/39) in Yunnan (altitude >2,000 m). The difference was highly significant (P < 0.0001) based on χ analysis. However, the partial prophage terminase gene sequences obtained from 10 Guangdong strains and 6 Yunnan strains were identical or highly similar, suggesting that at least some bacterial strains in the two locations shared a common recent origin. This is the first report on population variation of 'Ca. L. asiaticus' in China, where HLB was first described. The population variation of 'Ca. L. asiaticus' in the two geographical regions and the related HLB epidemiology were discussed.
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| http://dx.doi.org/10.1094/PDIS-04-10-0300 | DOI Listing |
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