Isolation and characterization of bacterial agents associated of wetwood disease on elm trees in Iran

M. Alizadeh; R. Khakvar; A. Babai-Ahari

doi:10.1556/038.52.2017.028

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Acta Phytopathologica et Entomologica Hungarica

Volume/Issue:: Volume 52: Issue 2

Isolation and characterization of bacterial agents associated of wetwood disease on elm trees in Iran

Authors:

M. Alizadeh

M. Alizadeh Plant Protection Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

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R. Khakvar

R. Khakvar Plant Protection Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

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A. Babai-Ahari

A. Babai-Ahari Plant Protection Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

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Pages:: 157–168

Online Publication Date:: Dec 2017

Publication Date:: 01 Dec 2017

Article Category:: Journal Article

DOI:: https://doi.org/10.1556/038.52.2017.028

Keywords:: Elm; wetwood; bacterial pathogens; molecular identification; East Azarbaijan

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Elm trees (Ulmus spp.) are one of the most widespread landscape plants, widely used as ornamental trees to embellish parks and streets of different countries including Iran. Elm trees cultivation is seriously limited by biotic factors such as bacterial pathogens. Recently, bacterial wetwood has been identified as a common disease on elm trees in Northwest Iran. In present study, in order to identify bacterial pathogens associated with elm trees, wetwood infected samples were collected from elm trees showing wetwood symptom across Tabriz city and immediately transferred to the lab. After isolation and purification of isolates, hypersensitive reaction (HR), pathogenicity, biochemical and molecular tests were used to characterize the isolates. In total of 92 isolates obtained, 32 and 10 isolates were able to induce HR and wetwood symptoms on tobacco leaves and young branches of elm, respectively. Based on biochemical and molecular tests, the identity of the isolates studied were determined as Brevundimonas bullata, Paracoccus alcaliphilus, P. marcusii and Luteimonas aestuarii. To the best of our knowledge, this study shows that these four bacterial species here reported are responsible for the causal agent-complex of wetwood disease on elm trees for the first time in the world.

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Acta Phytopathologica et Entomologica Hungarica

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Jenő KONTSCHÁN Centre for Agricultural Research, Hungary

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Ágnes TURÓCI Centre for Agricultural Research, Hungary

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K SALÁNKI Centre for Agricultural Research, Hungary

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Z BOZSÓ Centre for Agricultural Research, Hungary

PE CHETVERIKOV Saint-Petersburg State University, Russia

JX CUI Henan Institute of Science and Technology, China

J FODOR Centre for Agricultural Research, Hungary

Z IMREI Centre for Agricultural Research, Hungary

BM KAYDAN Çukurova University, Turkey

L KISS University of Southern Queensland, Australia

V MARKÓ Hungarian University of Agriculture and Life Sciences, Hungary

MW NEGM Ibaraki University, Japan

L PALKOVICS Széchenyi István University, Hungary

M POGÁNY Centre for Agricultural Research, Hungary

D RÉDEI National Chung Hsing University, Taiwan

A TOLSTIKOV University of Tyumen, Russia

J VUTS Rothamsted Research, UK

GQ WANG Guangxi University, China

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Acta Phytopathologica et Entomologica Hungarica
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