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Rapid and Efficient Detection of 16SrI Group Areca Palm Yellow Leaf Phytoplasma in China by Loop-Mediated Isothermal Amplification

  • Yu, Shao-shuai (Coconut Research Institute of Chinese Academy of Tropical Agricultural Sciences) ;
  • Che, Hai-yan (Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences) ;
  • Wang, Sheng-jie (Research Institute of Tropical Forestry, Chinese Academy of Forestry) ;
  • Lin, Cai-li (Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry) ;
  • Lin, Ming-xing (Coconut Research Institute of Chinese Academy of Tropical Agricultural Sciences) ;
  • Song, Wei-wei (Coconut Research Institute of Chinese Academy of Tropical Agricultural Sciences) ;
  • Tang, Qing-hua (Coconut Research Institute of Chinese Academy of Tropical Agricultural Sciences) ;
  • Yan, Wei (Coconut Research Institute of Chinese Academy of Tropical Agricultural Sciences) ;
  • Qin, Wei-quan (Coconut Research Institute of Chinese Academy of Tropical Agricultural Sciences)
  • Received : 2020.06.04
  • Accepted : 2020.08.20
  • Published : 2020.10.01

Abstract

Areca palm yellow leaf (AYL) disease caused by the 16SrI group phytoplasma is a serious threat to the development of the Areca palm industry in China. The 16S rRNA gene sequence was utilized to establish a rapid and efficient detection system efficient for the 16SrI-B subgroup AYL phytoplasma in China by loop-mediated isothermal amplification (LAMP). The results showed that two sets of LAMP detection primers, 16SrDNA-2 and 16SrDNA-3, were efficient for 16SrI-B subgroup AYL phytoplasma in China, with positive results appearing under reaction conditions of 64℃ for 40 min. The lowest detection limit for the two LAMP detection assays was the same at 200 ag/μl, namely approximately 53 copies/μl of the target fragments. Phytoplasma was detected in all AYL disease samples from Baoting, Tunchang, and Wanning counties in Hainan province using the two sets of LAMP primers 16SrDNA-2 and 16SrDNA-3, whereas no phytoplasma was detected in the negative control. The LAMP method established in this study with comparatively high sensitivity and stability, provides reliable results that could be visually detected, making it suitable for application and research in rapid diagnosis of AYL disease, detection of seedlings with the pathogen and breeding of disease-resistant Areca palm varieties.

Keywords

References

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