Viruses in Forest and Urban Trees and Shrubs

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Forest Health".

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 3982

Special Issue Editors


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Guest Editor
Humboldt-Universität zu Berlin, Faculty of Life Sciences, Albrecht Daniel Thaer-Insitute for Agricultural and Horticultural, Sciences Division of Phytomedicine Lentzeallee 55-57, D 14195 Berlin, Germany
Interests: emaraviruses; molecular characterization of plant viruses; viruses affecting decidious trees; genetic diversity; virus-plant-vector interaction

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Guest Editor
Humboldt-Universität zu Berlin, Faculty of Life Sciences, Albrecht Daniel Thaer-Insitute for Agricultural and Horticultural, Sciences Division of Phytomedicine Lentzeallee 55-57, D 14195 Berlin, Germany
Interests: forest virology; epidemiology; emaraviruses; diagnostics; distribution; virus transmission; ecology; virus dendrology; virome in trees

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Guest Editor
INRAE and Université de Bordeaux, Equipe de Virologie, UMR 1332 Biologie du Fruit et Pathologie, 71 avenue E. Bourlaux, CS 20032, 33882 Villenave d'Ornon, CEDEX, France
Interests: virus; viroid; metagenomics; diagnostics; genome; virus-plant interactions; mycovirus

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Guest Editor
RJ Consulting, Taimelantie 25, FI 96460 Rovaniemi, Finland
Interests: general forest pathology; viruses in forest trees; boreal forests; treeline and climate; retrospective forest pathology and past climate reconstruction; rust and needle diseases; abiotic diseases

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Guest Editor
Plant Pathology Laboratory, TERRA-Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030 Gembloux, Belgium
Interests: virus epidemiology; plant virome analysis; high throughput sequencing; molecular diagnostics; microbial communitites; microbiome

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Guest Editor
Research Scientist Forest Pathology, Canadian Forest Service, Natural Resources Canada/Government of Canada, Northern Forestry Centre, 5320 – 122 Street NW, Edmonton, AB, T6H 3S5, Canada
Interests: forest pathogen molecular diagnostics; foliar pathogens of conifers; root disease fungi; parasitic plants; ecology of soil fungi; mycorrhizal fungi

Special Issue Information

Investigations of viruses in forest ecosystems are extremely rare as compared to viruses of the agricultural and horticultural environment and they are far outnumbered by the number of studies focussed on fungal pathogens and pest insects of forest trees. Many well-characterized viruses and viroids are known from different agricultural cultivars, but only a few viruses have been commonly detected in urban and forest trees and shrubs; viroids have not been detected yet. This lack of knowledge misleads to the impression that viral diseases in forest trees are unimportant. However, viruses are probably responsible for far greater economic losses in these hosts than generally recognized because of the insidious nature of the losses since symptoms are often inconspicuous and may therefore go unnoticed.

Studies of virus diseases in tree fruit crops, grape and citrus have shown that in extreme situations causal viruses can eliminate a tree species over a very broad region. Plant viruses can alter host physiology and predisposition leading to diseased and damaged tissues or to reductions in metabolism and yield and therefore play a central role in plant health status. In contrast to other pathogens, viruses cannot be controlled by curative treatments.

A comprehensive understanding of the impact of viruses on forest tree health is therefore an important research focus, starting with their proper characterization at genome level and their association with plant stress and disease. The availability of detection protocols is also a cornerstone in the study of these viruses while a deeper understanding of their biology (host range, symptoms, transmission pathways) is required to develop appropriate prophylactic and control measures when needed to ensure a long-term economic forest stand.

We welcome articles that deal with the identification and the characterization of known and novel viruses (single or as a virome) affecting woody host species. Suitable diagnostic tools for detection of plant viruses infecting these hosts can also be reported. Emphasis is given to viruses and virus complexes that affect host species which are important in forestry or urban greens, but virus diseases and disease complexes of trees and shrub species in general will also be considered. Research reports may also focus on epidemiological issues, for instance the importance of long-lived host species as virus reservoirs, or the effects of viruses on tree health in combination with other biotic (pathobiome) and abiotic stress factors. Moreover, knowledge of viruses affecting pathogens of trees is needed. This includes plant viruses bringing benefits to their hosts. For example, knowledge of mycoviruses will provide understanding of their role in the fungal host and their potential to reduce virulence of the pathogen. Studies providing information about effects of virus infection on wood quality and yield will be of interest to the special issue as well as the report of management strategies and best practices to minimize virus diseases and prevent virus infection.

Dr. Susanne von Bargen
Prof. Dr. Carmen Büttner
Dr. Thierry Candresse
Dr. Risto Jalkanen
Prof. Dr. Sebastien Massart
Dr. Tod Ramsfield
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Forests is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant viruses
  • deciduous trees
  • conifers
  • virome
  • pathobiome
  • detection
  • epidemiology
  • viral genome
  • viroids
  • mycoviruses
  • virus-host interaction
  • metabolic impact
  • management

Published Papers (1 paper)

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Research

11 pages, 2181 KiB  
Article
Quantitative Distribution and Transmission of Tea Plant Necrotic Ring Blotch Virus in Camellia sinensis
by Hengze Ren, Yao Chen, Fumei Zhao, Changqing Ding, Kexin Zhang, Lu Wang, Yajun Yang, Xinyuan Hao and Xinchao Wang
Forests 2022, 13(8), 1306; https://doi.org/10.3390/f13081306 - 16 Aug 2022
Cited by 5 | Viewed by 1816
Abstract
Tea plant necrotic ring blotch virus (TPNRBV), which carries four positive-sense single-stranded RNA segments, causes discoloration spots and multiple necrotic ring blotches in tea trees. To understand the distribution and transmission of TPNRBV in tea trees and prevent its spread, a SYBR Green [...] Read more.
Tea plant necrotic ring blotch virus (TPNRBV), which carries four positive-sense single-stranded RNA segments, causes discoloration spots and multiple necrotic ring blotches in tea trees. To understand the distribution and transmission of TPNRBV in tea trees and prevent its spread, a SYBR Green real-time quantitative polymerase chain reaction (RT-qPCR) method for detecting the four virus segments was developed. The limit of detection of RT-qPCR was 3.81, 4.73, 3.58, and 4.64 copies/μL for the four strands of TPNRBV, which was 100-fold more sensitive than conventional PCR for RNA1 detection, 10-fold for RNA2 and RNA3, and 1000-fold for RNA4 detection. Visual observation and RT-qPCR of different tea plant tissues showed that symptomatic mature leaves contained the highest TPNRBV load; the concentrations of the four RNAs in other tissues decreased or were undetectable with increasing distances from symptomatic leaves. TPNRBV did not spread efficiently through seeds, cuttings, or mechanical inoculation, but was transmitted to some tea cultivars, particularly light albinistic varieties such as ‘Zhonghuang 1’ and ‘Huangjinya’, under field conditions. Our TPNRBV detection method is useful for determining the distribution and transmission characteristics of TPNRBV and selecting tissues with the highest viral load for early diagnosis, monitoring, and management of the disease. Full article
(This article belongs to the Special Issue Viruses in Forest and Urban Trees and Shrubs)
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