The occurrence and pathogenicity of Geosmithia spp. and common blue-stain fungi associated with pine bark beetles in planted forests in Israel

Dori-Bachash, Mally; Avrahami-Moyal, Liat; Protasov, Alex; Mendel, Zvi; Freeman, Stanley

doi:10.1007/s10658-015-0713-9

Cited by 20 publications

(40 citation statements)

References 53 publications

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“…In addition to O. minus, G. cf. rectangulosporium caused the decline of Scots pine seedlings, which indicates this species is moderate or weakly pathogenic, as reported previously (Jankowiak, 2012;Dori-Bachash et al, 2015 (Jankowiak, 2012) causes dieback of 100% of the Scots pine seedlings inoculated compared to the 45% of seedlings recorded in the present study. It appears that ophiostomatoid fungi are an important factor determining the aggressiveness of bark beetles (Krokene & Solheim, 1998) and may account for I. acuminatus being less aggressive than I. sexdentatus.…”

Section: Pathogenicity Testsupporting

confidence: 89%

Fungi associated with Ips acuminatus (Coleoptera: Curculionidae) in Ukraine with a special emphasis on pathogenicity of ophiostomatoid species

Davydenko¹,

Vasaitis²,

Menkis³

2017

Eur. J. Entomol.

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Section: Pathogenicity Testsupporting

confidence: 89%

Fungi associated with Ips acuminatus (Coleoptera: Curculionidae) in Ukraine with a special emphasis on pathogenicity of ophiostomatoid species

Davydenko¹,

Vasaitis²,

Menkis³

2017

Eur. J. Entomol.

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“…There was also no evidence that this ambrosia beetle can transmit Geosmithia fungi in pine habitats [9]. The genus Geosmithia currently includes 44 recognized taxa with only 16 described to date, most of which are associated with phloem-breeding bark beetles [4,5,[7][8][9][10][11][12][13][14][15][16]. In the present study, we identified two distinct Geosmithia operational taxonomic units (OTUs) based on morphological and molecular characterizations.…”

Section: Discussionmentioning

confidence: 85%

“…Bark-and wood-boring beetles (Coleoptera) are commonly associated with various species of ascomycetes in three orders: Ophiostomatales, Microascales, and Hypocreales [1,2]. Members of the Hypocreales are common in all types of moist forests [3], however, only Geosmithia fungi that produce Penicillium-like conidiophores are associates of bark beetles on hardwood and conifer trees worldwide [4][5][6][7][8][9][10][11][12][13][14][15][16]. The bark beetle-Geosmithia relationships vary, ranging from specialists with a limited range of vectors to generalists recorded with numerous vectors [4,6,9,11].…”

Section: Introductionmentioning

confidence: 99%

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Geosmithia species associated with fir-infesting beetles in Poland

Jankowiak

Bilański

2018

Acta Mycol

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Geosmithia species (Ascomycota: Hypocreales) are common ectosymbionts of scolytine bark and ambrosia beetles that feed on coniferous and deciduous trees in different forest ecosystems. Geosmithia morbida is the canker pathogen that causes extensive mortality of Juglans nigra. Because little is known regarding the Geosmithia species on European silver fir (Abies alba), we have investigated the diversity and abundance of these fungi associated with insects infesting European silver fir in Poland. Samples associated with eight beetle species were collected from three fir forests. Fungi were isolated from beetles and galleries. Isolates were identified based on morphological characteristics, DNA sequence comparison for three gene regions (ITS, ßT, TEF1-α), and phylogenetic analyses. Geosmithia was detected in 33% of the total 531 beetle samples obtained from A. alba. Two undescribed species of Geosmithia were distinguished, Geosmithia sp. 9 and Geosmithia sp. 16. Associations of Pityokteines spp. with Geosmithia fungi were recorded for the first time. Pityokteines vorontzowi and Pityophthorus pityographus appear to be regular vectors for Geosmithia sp. 9 and Geosmithia sp. 16, respectively. Pityokteines curvidens and Cryphalus piceae were associated with Geosmitha sp. 9 at lower frequencies.

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“…1 can coexist with M. alternatus and is even known to promote development and survival of beetles (Zhao et al, 2013). In the nature, many insects develop symbiotic relationships with ophiostomatoid blue stain fungi (Dori-Bachash et al, 2015;Lu et al, 2016;Repe et al, 2013;Zhao et al, 2014). As symbiotic fungi, most of them do not kill their hosts, rather are beneficial to them (Hartley and Gange, 2009) which is very different from entomopathogenic fungi.…”

Section: Introductionmentioning

confidence: 99%

Differential immune responses of Monochamus alternatus against symbiotic and entomopathogenic fungi

Zhang

Meng

Ning

et al. 2017

Sci. China Life Sci.

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Monochamus alternatus, the main vector beetles of invasive pinewood nematode, has established a symbiotic relationship with a native ectotrophic fungal symbiont, Sporothrix sp. 1, in China. The immune response of M. alternatus to S. sp. 1 in the coexistence of beetles and fungi is, however, unknown. Here, we report that immune responses of M. alternatus pupae to infection caused by ectotrophic symbiotic fungus S. sp. 1 and entomopathogenic fungus Beauveria bassiana differ significantly. The S. sp. 1 did not kill the beetles while B. bassiana killed all upon injection. The transcriptome results showed that the numbers of differentially expressed genes in M. alternatus infected with S. sp. 1 were 2-fold less than those infected with B. bassiana at 48 hours post infection. It was noticed that Toll and IMD pathways played a leading role in the beetle's immune system when infected by symbiotic fungus, but upon infection by entomopathogenic fungus, only the Toll pathway gets triggered actively. Furthermore, the beetles could tolerate the infection of symbiotic fungi by retracing their Toll and IMD pathways at 48 h. This study provided a comprehensive sequence resource of M. alternatus transcriptome for further study of the immune interactions between host and associated fungi.Monochamus alternatus, symbiotic fungus, Beauveria bassiana, RNA-seq, immune signaling pathway Citation:Zhang, W., Meng, J., Ning, J., Qin, P., Zhou, J., Zou, Z., Wang, Y., Jiang, H., Ahmad, F., Zhao, L., and Sun, J. (2017). Differential immune responses of Monochamus alternatus against symbiotic and entomopathogenic fungi. Sci China Life Sci 60, 902-910.

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The occurrence and pathogenicity of Geosmithia spp. and common blue-stain fungi associated with pine bark beetles in planted forests in Israel

Cited by 20 publications

References 53 publications

Fungi associated with Ips acuminatus (Coleoptera: Curculionidae) in Ukraine with a special emphasis on pathogenicity of ophiostomatoid species

Fungi associated with Ips acuminatus (Coleoptera: Curculionidae) in Ukraine with a special emphasis on pathogenicity of ophiostomatoid species

Geosmithia species associated with fir-infesting beetles in Poland

Differential immune responses of Monochamus alternatus against symbiotic and entomopathogenic fungi

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