Fungal Communities Associated with Bark Beetles in Pinus radiata Plantations in Northern Spain Affected by Pine Pitch Canker, with Special Focus on Fusarium Species

Bezos, Diana; Martínez‐Álvarez, Pablo; Sanz-Ros, Antonio V.; Martín‐García, Jorge; Fernández, Mercedes

doi:10.3390/f9110698

Cited by 17 publications

(16 citation statements)

References 54 publications

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“…Bioactive dihydronaphthoquinone derivatives of Fusarium solani exhibit strong cytotoxic activity [64]. For the presence of F. solani within the samples, since ITS region is not a good molecular marker for Fusarium species, the molecular marker Elongation Factor (TEF 1α) should also be analyzed [65].…”

Section: Discussionmentioning

confidence: 99%

Endophytic Mycobiota of Jingbai Pear Trees in North China

Ren

Dong

Sun

et al. 2019

Forests

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Endophytic fungi exist in all known plants and play an important role for plant growth and health. As an important forest tree the Jingbai pear (the best quality cultivar of Pyrus ussuriensi Maxim. ex Rupr.) has great ecological as well as economic value in north China. However, the mycobiota of the pear tree is still unknown. In this study, the fungal communities in different organs of the tree and in rhizosphere soils were investigated by Illumina Miseq sequencing of ITS rDNA. For organs, the roots had the highest fungal richness and diversity, while the flowers had the lowest richness and diversity. The results demonstrated that each of the organs investigated harbored a distinctive fungal assemblage. Overall, Ascomycota was the most abundant phyla, followed by Basidiomycota and Zygomycota. Fungal communities from the different soils also differed from each other. The redundancy analysis (RDA) showed that fungal community structure correlated significantly with soil temperature, soil pH, soil nitrogen and soil carbon contents. The results indicate that plant organs, site conditions and soil properties may have important influences on the endophytic fungal community structure associated with Jingbai pear trees.

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Section: Discussionmentioning

confidence: 99%

Endophytic Mycobiota of Jingbai Pear Trees in North China

Ren

Dong

Sun

et al. 2019

Forests

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“…Alternatively, as Wikler et al (2003) [38] suggested, the differences in disease occurrence of PPC might be the result of differences between regions within the study area that have different abundances of insects that vector the disease or alternatively act as wounding agents. Several bark beetle species that can vector F. circinatum have been identified in Northern Spain [25,66].…”

Section: Discussionmentioning

confidence: 99%

Factors Affecting the Distribution of Pine Pitch Canker in Northern Spain

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Martín‐García

Bezos

et al. 2019

Forests

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Fusarium circinatum is the causal agent of pine pitch canker disease (PPC), affecting Pinus species and other conifers (i.e., Pseudotsuga menziesii (Mirb.) Franco.), forming resinous cankers on the main stem and branches and causing dieback in the terminal guide. This pathogen is spreading worldwide, causing economic losses by converting plantations into standing timber without any potential for future production. The disease was recently detected in Northern Spain in plantations of Pinus radiata and forest nurseries. The aim of the work reported here was to study the role of climatic and topographic variables, soil properties, and stand characteristics on PPC. For this purpose, we surveyed 50 pine stands in Cantabria and quantified the percentage of trees showing three symptoms in each stand: canker, defoliation, and dieback. We investigated the predictive power of 30 variables using generalized linear models and hierarchical partitioning. Both approaches yielded similar results. We found that the three symptoms correlated with different explanatory variables. In addition, more trees exhibited cankers in the proximity of the coast and the Basque Country. Additionally, our results showed that low canopy cover is related to a high level of the dieback symptom. Overall, this study highlights the important variables affecting the distribution of PPC in Cantabria.

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“…Many insects are known to carry the pitch canker pathogen in America, including pine-associated bark beetles (Coleoptera: Scolytidae) belonging to the genera Pityophthorus, Ips, Conophthorus and Ernobius (Coleoptera: Anobiidae) . Recently, observations have been made in Europe (Pityophthorus and Tomicus) (Bezos et al, 2018) The following entry pathways from infested areas have been identified:…”

Section: Confusion With Other Pathogens/pestsmentioning

confidence: 99%

Commodity risk assessment of black pine (Pinus thunbergii Parl.) bonsai from Japan

Bragard¹,

Dehnen‐Schmutz²,

Serio³

et al. 2019

EFS2

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The EFSA Panel on Plant health was requested to deliver a scientific opinion on how far the existing requirements for the bonsai pine species subject to derogation in Commission Decision 2002/887/EC would cover all plant health risks from black pine (Pinus thunbergii Parl.) bonsai (the commodity defined in the EU legislation as naturally or artificially dwarfed plants) imported from Japan, taking into account the available scientific information, including the technical information provided by Japan. The relevance of an EU-regulated pest for this opinion was based on: (a) evidence of the presence of the pest in Japan; (b) evidence that P. thunbergii is a host of the pest and (c) evidence that the pest can be associated with the commodity. Sixteen pests that fulfilled all three criteria were selected for further evaluation. The relevance of other pests present in Japan (not regulated in the EU) for this opinion was based on (i) evidence of the absence of the pest in the EU; (ii) evidence that P. thunbergii is a host of the pest; (iii) evidence that the pest can be associated with the commodity and (iv) evidence that the pest may have an impact in the EU. Three pests fulfilled all four criteria and were selected for further evaluation (Crisicoccus pini, Sirex nitobei and Urocerus japonicus). For the selected 19 pests, the risk mitigation measures proposed in the technical dossier were evaluated. Limiting factors on the effectiveness of the measures were documented. For each of the 19 pests, an expert judgement is given on the likelihood of pest freedom taking into consideration the risk mitigation measures acting on the pest, including any uncertainties. For all evaluated pests, the median likelihood of the pest freedom is 99.5% or higher and within the 90% uncertainty range it is 99% or higher.

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Fungal Communities Associated with Bark Beetles in Pinus radiata Plantations in Northern Spain Affected by Pine Pitch Canker, with Special Focus on Fusarium Species

Cited by 17 publications

References 54 publications

Endophytic Mycobiota of Jingbai Pear Trees in North China

Endophytic Mycobiota of Jingbai Pear Trees in North China

Factors Affecting the Distribution of Pine Pitch Canker in Northern Spain

Commodity risk assessment of black pine (Pinus thunbergii Parl.) bonsai from Japan

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