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Title: ‘Candidatus Liberibacter asiaticus’, causal agent of citrus Huanglongbing, is reduced by treatment with Brassinosteroids

Huanglongbing (HLB) constitutes the most destructive disease of citrus worldwide, yet no established efficient management measures exist for it. Brassinosteroids, a family of plant steroidal compounds, are essential for plant growth, development and stress tolerance. As a possible control strategy for HLB, epibrassinolide was applied to as a foliar spray to citrus plants infected with the causal agent of HLB, ‘Candidatus Liberibacter asiaticus’. The bacterial titers were reduced after treatment with epibrassinolide under both greenhouse and field conditions but were stronger in the greenhouse. Known defense genes were induced in leaves by epibrassinolide. With the SuperSAGE technology combined with next generation sequencing, induction of genes known to be associated with defense response to bacteria and hormone transduction pathways were identified. Lastly, the results demonstrate that epibrassinolide may provide a useful tool for the management of HLB.
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  1. Center for Genetic Engineering and Biotechnology, Havana (Cuba)
  2. Univ. of Havana, Havana (Cuba)
  3. Inst. of Tropical Fruit Investigations, Havana (Cuba)
  4. Empresa Agroindustrial Victoria de Giron, Matanzas (Cuba)
  5. Iwate Biotechnology Research Center, Kitakami (Japan)
  6. Shinshu Univ., Ueda (Japan)
  7. National Inst. of Agriculture Science, Mayabeque (Cuba)
  8. Michigan State Univ., East Lansing, MI (United States)
  9. Tobacco Research Inst., Havana (Cuba)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 1932-6203
Public Library of Science
Research Org:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
citrus; DNA-binding proteins; transcription factors; polymerase chain reaction; leaves; plant biochemistry; gene expression; expressed sequence tags
OSTI Identifier: