Molecular Aspects of an Emerging Poplar Canker Caused by Lonsdalea populi

Li, Aining; He, Wei

doi:10.3389/fmicb.2019.02496

Cited by 15 publications

(15 citation statements)

References 31 publications

(40 reference statements)

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“…To demonstrate the phylogenetics of L. populi with 12 related bacteria ( Table 3 ), we generated a phylogenetic tree based on single orthologs, which showed that L. populi was closer to Brenneria and Dickeya than to Erwinia ( Figure 4 A). This was consistent with the results of Li and He [ 6 ]. The average nucleotide identity (ANI) values of the 13 genomes were counted using JSpecies software.…”

Section: Resultssupporting

confidence: 94%

“…Infected poplars may die, and entire branches can be broken off by wind [ 5 ]. L. populi has also been reported to naturally infect willow trees ( Salix matsudana ) and causes typical canker symptoms [ 6 ]. Because the bacterium extensively colonizes poplar bark, chemical measures are ineffective for curing and controlling Lonsdalea -infected cankers [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

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Genomic Characterization Provides an Insight into the Pathogenicity of the Poplar Canker Bacterium Lonsdalea populi

Chen

Wang

et al. 2021

Genes

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An emerging poplar canker caused by the gram-negative bacterium, Lonsdalea populi, has led to high mortality of hybrid poplars Populus × euramericana in China and Europe. The molecular bases of pathogenicity and bark adaptation of L. populi have become a focus of recent research. This study revealed the whole genome sequence and identified putative virulence factors of L. populi. A high-quality L. populi genome sequence was assembled de novo, with a genome size of 3,859,707 bp, containing approximately 3434 genes and 107 RNAs (75 tRNA, 22 rRNA, and 10 ncRNA). The L. populi genome contained 380 virulence-associated genes, mainly encoding for adhesion, extracellular enzymes, secretory systems, and two-component transduction systems. The genome had 110 carbohydrate-active enzyme (CAZy)-coding genes and putative secreted proteins. The antibiotic-resistance database annotation listed that L. populi was resistant to penicillin, fluoroquinolone, and kasugamycin. Analysis of comparative genomics found that L. populi exhibited the highest homology with the L. britannica genome and L. populi encompassed 1905 specific genes, 1769 dispensable genes, and 1381 conserved genes, suggesting high evolutionary diversity and genomic plasticity. Moreover, the pan genome analysis revealed that the N-5-1 genome is an open genome. These findings provide important resources for understanding the molecular basis of the pathogenicity and biology of L. populi and the poplar-bacterium interaction.

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Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Genomic Characterization Provides an Insight into the Pathogenicity of the Poplar Canker Bacterium Lonsdalea populi

Chen

Wang

et al. 2021

Genes

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“…These diseases, characterized by a canker with white exudates, are confined to the bark of the trunk and branches, primarily in summer [62]. A large percentage of the plantation area of P. × euramericana hybrid poplars in China and Hungary is affected by L. populi, which causes extensive damage to the plantations [63].…”

Section: Phytopathogenic Bacteriamentioning

confidence: 99%

The Threat of Pests and Pathogens and the Potential for Biological Control in Forest Ecosystems

Balla

Silini

Cherif‐Silini

et al. 2021

Forests

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Forests are an essential component of the natural environment, as they support biodiversity, sequester carbon, and play a crucial role in biogeochemical cycles—in addition to producing organic matter that is necessary for the function of terrestrial organisms. Forests today are subject to threats ranging from natural occurrences, such as lightning-ignited fires, storms, and some forms of pollution, to those caused by human beings, such as land-use conversion (deforestation or intensive agriculture). In recent years, threats from pests and pathogens, particularly non-native species, have intensified in forests. The damage, decline, and mortality caused by insects, fungi, pathogens, and combinations of pests can lead to sizable ecological, economic, and social losses. To combat forest pests and pathogens, biocontrol may be an effective alternative to chemical pesticides and fertilizers. This review of forest pests and potential adversaries in the natural world highlights microbial inoculants, as well as research efforts to further develop biological control agents against forest pests and pathogens. Recent studies have shown promising results for the application of microbial inoculants as preventive measures. Other studies suggest that these species have potential as fertilizers.

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“…populi) Communicated by Erko Stackebrandt. (Toth et al 2013;Li et al 2014;Li and He 2019). Bacteria overwinter on infected plant tissues, in necrosis, gummosis and sap oozing from wounds or healthy looking plant tissues.…”

Section: Introductionmentioning

confidence: 99%

Bacteria associated with vascular wilt of poplar

et al. 2021

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In 2017, a 560-ha area of hybrid poplar plantation in northern Poland showed symptoms of tree decline. Leaves appeared smaller, turned yellow–brown, and were shed prematurely. Twigs and smaller branches died. Bark was sunken and discolored, often loosened and split. Trunks decayed from the base. Phloem and xylem showed brown necrosis. Ten per cent of trees died in 1–2 months. None of these symptoms was typical for known poplar diseases. Bacteria in soil and in the necrotic base of poplar trunk were analyzed with Illumina sequencing. Soil and wood were colonized by at least 615 and 249 taxa. The majority of bacteria were common to soil and wood. The most common taxa in soil were: Acidobacteria (14.76%), Actinobacteria (14.58%), Proteobacteria (36.87) with Betaproteobacteria (6.52%), (6.10%), Comamonadaceae (2.79%), and Verrucomicrobia (5.31%).The most common taxa in wood were: Bacteroidetes (22.72%) including Chryseobacterium (5.07%), Flavobacteriales (10.87%), Sphingobacteriales (9.40%) with Pedobacter cryoconitis (7.31%), Proteobacteria (73.79%) with Enterobacteriales (33.25%) including Serratia (15.30%) and Sodalis (6.52%), Pseudomonadales (9.83%) including Pseudomonas (9.02%), Rhizobiales (6.83%), Sphingomonadales (5.65%), and Xanthomonadales (11.19%). Possible pathogens were Pseudomonas, Rhizobium and Xanthomonas. The potential initial, endophytic character of bacteria is discussed. Soil and possibly planting material might be the reservoir of pathogen inoculum.

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Molecular Aspects of an Emerging Poplar Canker Caused by Lonsdalea populi

Cited by 15 publications

References 31 publications

Genomic Characterization Provides an Insight into the Pathogenicity of the Poplar Canker Bacterium Lonsdalea populi

Genomic Characterization Provides an Insight into the Pathogenicity of the Poplar Canker Bacterium Lonsdalea populi

The Threat of Pests and Pathogens and the Potential for Biological Control in Forest Ecosystems

Bacteria associated with vascular wilt of poplar

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