Journal of Plant Pathology

, Volume 101, Issue 1, pp 31–37 | Cite as

Acidovorax avenae subsp. cattleyae causes bacterial brown spot disease on terrestrial orchid Habenaria lindleyana in Thailand

  • Jureerat Khamtham
  • Angsana AkarapisanEmail author
Original Article


Bacterial diseases of orchid are widespread and constitute a serious limiting factor to the production of the terrestrial orchid, Habaneria lindleyana. Bacteria were isolated from terrestrial orchids exhibiting disease symptoms in the Chiang Mai province of Thailand. Initial symptoms were circular, water-soaked leaf spots, which became brown and surrounded by yellow haloes, then enlarged to irregularly-shaped brown blotches followed by necrosis. Pathogenicity tests proved that a bacterium caused the same symptoms on H. lindleyana leaves after inoculation. The bacterium was identified as Acidovorax avenae subsp. cattleyae based on bacteriological analyses and 16S rRNA sequence comparison. Additional pathogenicity tests indicated that an isolate of A. avenae subsp. cattleyae from H. lindleyana could cause brown spots in other orchid genera. To our knowledge, this is the first study conducted to evaluate the importance of A. avenae subsp. cattleyae as an orchid pathogen in the Chiang Mai province of Thailand.


Orchid Habaneria Acidovorax Molecular identification 



This research was partially supported by the Center of Excellence on Agricultural Biotechnology, Science and Technology Postgraduate Education and Research Development Office, Office of Higher Education Commission, Ministry of Education (AG-BIO/PERDO-CHE).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Statement of human and animal rights

This article does not contain any studies with human or animal subjects performed by the any of the authors.


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Copyright information

© Società Italiana di Patologia Vegetale (S.I.Pa.V.) 2018

Authors and Affiliations

  1. 1.Division of Plant Pathology, Department of Entomology and Plant Pathology, Faculty of AgricultureChiang Mai UniversityChiang MaiThailand
  2. 2.Center for Agricultural BiotechnologyKasetsart UniversityNakhon PathomThailand
  3. 3.Center of Excellence on Agricultural Biotechnology (AG-BIO/PERDO-CHE)BangkokThailand

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