<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>In recent decades, in many regions of the planet, there has been a widespread deterioration in the health condition and dieback of dark coniferous forests, caused by the combined action of various stress factors of biotic and abiotic origin. Forests with the participation of species of the genus <italic>Abies</italic> Mill. are particularly prone to degradation and dieback. The aim of the research is to study the symptoms of bacterial wetwood disease of <italic>Abies alba</italic> in the Ivano-Frankivsk region (state enterprise ‘Kutske forestry’) and to determine the anatomical, morphological and cultural properties of the pathogen. Some of the common symptoms of the disease include cracks and ulcers on the trunks with exfoliated rhytidome and exudate secretion, massive development of epicormic shoots, saturated xylem and phloem, wet rot with a characteristic odour of fermentation and pathological nucleus.</p>
<p>Based on the syntaxonomic analysis of fir forests, an attempt has been made to identify the objective causes that lead to excessive development of phytopathogens and dieback of <italic>Abies alba</italic>. Our research established that the primary cause of dieback of <italic>Abies alba</italic> Mill. forests is a systemic, vascular–parenchymal disease known as bacterial wetwood of fir, which affects all plant tissues at all stages of ontogenesis. We isolated and experimentally confirmed that the causative agent of the disease is a phytopathogenic bacterium <italic>Lelliottia nimipressuralis</italic> (<xref ref-type="bibr" rid="j_ffp-2022-0017_ref_005">Carter 1945</xref>) <xref ref-type="bibr" rid="j_ffp-2022-0017_ref_002">Brady et al. 2013</xref>, which also causes bacterial wetwood in many species of forest woody plants, and also studied its common morphological, physiological and biochemical properties.</p>
</abstract>

In recent decades, in many regions of the planet, there has been a widespread deterioration in the health condition and dieback of dark coniferous forests, caused by the combined action of various stress factors of biotic and abiotic origin. Forests with the participation of species of the genus Abies Mill. are particularly prone to degradation and dieback. The aim of the research is to study the symptoms of bacterial wetwood disease of Abies alba in the Ivano-Frankivsk region (state enterprise ‘Kutske forestry’) and to determine the anatomical, morphological and cultural properties of the pathogen. Some of the common symptoms of the disease include cracks and ulcers on the trunks with exfoliated rhytidome and exudate secretion, massive development of epicormic shoots, saturated xylem and phloem, wet rot with a characteristic odour of fermentation and pathological nucleus.
Based on the syntaxonomic analysis of fir forests, an attempt has been made to identify the objective causes that lead to excessive development of phytopathogens and dieback of Abies alba. Our research established that the primary cause of dieback of Abies alba Mill. forests is a systemic, vascular–parenchymal disease known as bacterial wetwood of fir, which affects all plant tissues at all stages of ontogenesis. We isolated and experimentally confirmed that the causative agent of the disease is a phytopathogenic bacterium Lelliottia nimipressuralis (Carter 1945) Brady et al. 2013, which also causes bacterial wetwood in many species of forest woody plants, and also studied its common morphological, physiological and biochemical properties.

<italic>Lelliottia nimipressuralis</italic> (<xref ref-type="bibr" rid="j_ffp-2022-0017_ref_005">Carter 1945</xref>) <xref ref-type="bibr" rid="j_ffp-2022-0017_ref_002">Brady et al. 2013</xref> as the causative agent of bacterial wetwood disease of common silver fir (<italic>Abies alba</italic> mill.)

National University of Life and Environmental Sciences of Ukraine

National University of Forestry of Ukraine

Folia Forestalia Polonica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

 ()  as the causative agent of bacterial wetwood disease of common silver fir ( mill.)

In recent decades, in many regions of the planet, there has been a widespread deterioration in the health condition and dieback of dark coniferous forests,...

Lelliottia nimipressuralis (Carter 1945) Brady et al. 2013 as the causative agent of bacterial wetwood disease of common silver fir (Abies alba mill.)

Article Category: Original Article

Published Online: Sep 22, 2022

Page range: 173 - 183

Received: Feb 17, 2022

Accepted: May 09, 2022

DOI: https://doi.org/10.2478/ffp-2022-0017

Keywords
dieback, aetiology, J. Braun-Blanquet method, pathogenesis

© 2022 Ivanna M. Kulbanska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Lelliottia nimipressuralis (Carter 1945) Brady et al. 2013 as the causative agent of bacterial wetwood disease of common silver fir (Abies alba mill.)

Article Category: Original Article

Published Online: Sep 22, 2022

Page range: 173 - 183

Received: Feb 17, 2022

Accepted: May 09, 2022

DOI: https://doi.org/10.2478/ffp-2022-0017

Keywordsdieback, aetiology, J. Braun-Blanquet method, pathogenesis

© 2022 Ivanna M. Kulbanska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
dieback, aetiology, J. Braun-Blanquet method, pathogenesis