Loop-mediated isothermal amplification (LAMP) based method for rapid and sensitive detection of ‘Candidatus Liberibacter asiaticus’ in citrus and the psyllid vector, Diaphorina citri Kuwayama

  • Dilip Kumar GhoshEmail author
  • Sumit Bhose
  • Ashish Warghane
  • Manali Motghare
  • Ashwani Kumar Sharma
  • Arun Kumar Dhar
  • Siddarame Gowda
Short Communication


Citrus greening is a destructive disease of citrus in India and many citrus-growing regions around the world. The disease is associated with three Gram negative, fastidious and phloem-limited bacteria in the genus ‘Candidatus Liberibacter’. ‘Ca. L. asiaticus’ is the most wide spread and destructive species. Currently, there is no effective control method available to manage this disease, thus rapid detection, control of its psyllid vector population and removal of affected trees are commonly recommended to manage citrus greening . The present study was conducted to standardize a rapid and sensitive loop-mediated isothermal amplification (LAMP) protocol to detect ‘Ca. L. asiaticus’ in citrus and the psyllid vector Diaphorina citri Kuwayama. A set of six primers were identified from 16S rDNA region of Indian ‘Ca. L. asiaticus’ and the amplification reaction was optimized to 65 °C for 60 min. The amplified DNA produced a ladder-like band pattern on agarose gels, and visually produced an intense green color upon staining with SYBR green. The results were subsequently validated by PCR (polymerase chain reaction) and sequencing of the amplicon. The optimized LAMP protocol is rapid, highly sensitive and cost-effective method for the early detection of citrus greening in citrus groves and nurseries, and could be performed even in small laboratories located in remote places with limited resources.


Huanglongbing LAMP Candidatus Liberibacter asiaticus Diaphorina citri Citrus greening disease 





Loop-mediated isothermal amplification


Polymerase chain reaction


Ultra violet


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Copyright information

© Society for Plant Biochemistry and Biotechnology 2015

Authors and Affiliations

  • Dilip Kumar Ghosh
    • 1
    Email author
  • Sumit Bhose
    • 1
  • Ashish Warghane
    • 1
  • Manali Motghare
    • 1
  • Ashwani Kumar Sharma
    • 2
  • Arun Kumar Dhar
    • 3
  • Siddarame Gowda
    • 4
  1. 1.ICAR- Central Citrus Research InstituteShankarnagarIndia
  2. 2.Department of BiotechnologyIndian Institute of TechnologyRoorkeeIndia
  3. 3.BrioBiotechGlenelgUSA
  4. 4.Citrus Research and Education CenterUniversity of FloridaLake AlfredUSA

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