Mycological complex of poplars in Serbia

Keča, Nenad; Milenković, Ivan; Keča, Ljiljana

doi:10.17221/13/2014-jfs

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…The known host-Phytophthora associations of P. cactorum and P. plurivora and Populus spp. [4,[11][12][13] were confirmed by this study. In both the soil infestation and the underbark inoculation test, P. cactorum and P. plurivora demonstrated high aggressiveness to the roots and bark of poplar clones I-214 and Pánnonia.…”

Section: Discussionsupporting

confidence: 78%

“…Phytophthora cactorum had been isolated from bleeding cankers of Populus alba in the Czech Republic [11] and from the rhizosphere of young P. alba trees in Hungary [4], while P. × cambivora was recovered from poplar trees in Croatia [12]. A preliminary study demonstrated the presence of P. cactorum and P. plurivora in the rhizosphere of poplar trees in Serbia [13].…”

Section: Discussionmentioning

confidence: 99%

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Isolation and Pathogenicity of Phytophthora Species from Poplar Plantations in Serbia

Milenković

Keča

Karadžić

et al. 2018

Forests

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During a survey in three declining and three healthy poplar plantations in Serbia, six different Phytophthora species were obtained. Phytophthora plurivora was the most common, followed by P. pini, P. polonica, P. lacustris, P. cactorum, and P. gonapodyides. Pathogenicity of all isolated species to four-month and one-year-old cuttings of Populus hybrid clones I-214 and Pánnonia, respectively, was tested using both a soil infestation and stem inoculation test. Isolates of P. polonica, P. × cambivora, P. cryptogea, and P. × serendipita from other host plants were included as a comparison. In the soil infestation test, the most aggressive species to clone I-214 were P. plurivora, P. × serendipita, and P. pini. On clone Pánnonia, P. gonapodyides and P. pini were the most aggressive, both causing 100% mortality, followed by P. cactorum, P. × cambivora, and P. polonica. In the underbark inoculation test, the susceptibility of both poplar clones to the different Phytophthora species was largely similar, as in the soil infestation test, with the exception of P. polonica, which proved to be only weakly pathogenic to poplar bark. The most aggressive species to clone I-214 was P. pini, while on clone Pánnonia, the longest lesions and highest disease incidence were caused by P. gonapodyides. Phytophthora cactorum and P. plurivora were pathogenic to both clones, whereas P. × cambivora showed only weak pathogenicity. The implications of these findings and possible pathways of dispersion of the pathogens are discussed.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Isolation and Pathogenicity of Phytophthora Species from Poplar Plantations in Serbia

Milenković

Keča

Karadžić

et al. 2018

Forests

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“…The pathogenicity of P. cac-torum has been assessed on young apple trees and apple fruits [33]. In Serbia P. cactorum has been reported on maple [34], in the soils of young hybrid poplar stands [35], on sycamore, walnut, common hawthorn, sessile oak, Hungarian oak, common alder, European wild pear and apple [36]. Having in mind these findings and the generally accepted view of P. cactorum as a generalist pathogen, we would expect that this plant pathogen is present on numerous other plant hosts in Macedonia.…”

Section: Resultsmentioning

confidence: 99%

PHYTOPHTHORA CACTORUM (LEBERT & COHN) J. SCHRÖT AS CAUSAL AGENT OF DIEBACK OF CHESTNUT AND APPLE TREES IN MACEDONIA

et al. 2019

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From 2013–2017, 11 chestnut populations and 16 apple orchards/plantations in Macedonia were examined for health; soil, root and bark samples were collected from trees expressing symptoms regarded as Phytophthora specific. Using leaf baits of Prunus laurocerasus and selective V8 Agar (PARPNH), 19 pure Phytophthora sp. cultures were isolated and identified as P. cactorum by ITS sequencing. Sixteen isolates were from apple trees and 3 from chestnut trees. Phylogenetic analyses suggested slight distance between P. cactorum isolates originating from chestnut trees compared to those from apple orchards. Assessment of pathogenicity using chestnuts twigs showed no differences be-tween P. cactorum isolates from the two tree host species.

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“…Taken together with a high demand for irrigation that provides natural means for Phytophthora spreading, poplar plantations are facing a serious threat. Indeed, recent reports have shown that Phytophthora species are already present in the rhizosphere under poplar trees, including aggressive species such as P. cactorum and P. plurivora ( Keča et al., 2016 ; Milenković et al., 2018 ). Following an artificial inoculation, both these pathogens induced a canker formation in the hybrid poplar clone T14 ( Ďurkovič et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Defense mechanisms promoting tolerance to aggressive Phytophthora species in hybrid poplar

et al. 2022

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Poplars are among the fastest-growing trees and significant resources in agriculture and forestry. However, rapid growth requires a large water consumption, and irrigation water provides a natural means for pathogen spread. That includes members of Phytophthora spp. that have proven to be a global enemy to forests. With the known adaptability to new hosts, it is only a matter of time for more aggressive Phytophthora species to become a threat to poplar forests and plantations. Here, the effects of artificial inoculation with two different representatives of aggressive species (P. cactorum and P. plurivora) were analyzed in the proteome of the Phytophthora-tolerant hybrid poplar clone T-14 [Populus tremula L. 70 × (Populus × canescens (Ait.) Sm. 23)]. Wood microcore samples were collected at the active necrosis borders to provide insight into the molecular processes underlying the observed tolerance to Phytophthora. The analysis revealed the impact of Phytophthora on poplar primary and secondary metabolism, including carbohydrate-active enzymes, amino acid biosynthesis, phenolic metabolism, and lipid metabolism, all of which were confirmed by consecutive metabolome and lipidome profiling. Modulations of enzymes indicating systemic response were confirmed by the analysis of leaf proteome, and sampling of wood microcores in distal locations revealed proteins with abundance correlating with proximity to the infection, including germin-like proteins, components of proteosynthesis, glutamate carboxypeptidase, and an enzyme that likely promotes anthocyanin stability. Finally, the identified Phytophthora-responsive proteins were compared to those previously found in trees with compromised defense against Phytophthora, namely, Quercus spp. and Castanea sativa. That provided a subset of candidate markers of Phytophthora tolerance, including certain ribosomal proteins, auxin metabolism enzymes, dioxygenases, polyphenol oxidases, trehalose-phosphate synthase, mannose-1-phosphate guanylyltransferase, and rhamnose biosynthetic enzymes. In summary, this analysis provided the first insight into the molecular mechanisms of hybrid poplar defense against Phytophthora and identified prospective targets for improving Phytophthora tolerance in trees.

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Mycological complex of poplars in Serbia

Cited by 8 publications

References 11 publications

Isolation and Pathogenicity of Phytophthora Species from Poplar Plantations in Serbia

Isolation and Pathogenicity of Phytophthora Species from Poplar Plantations in Serbia

PHYTOPHTHORA CACTORUM (LEBERT & COHN) J. SCHRÖT AS CAUSAL AGENT OF DIEBACK OF CHESTNUT AND APPLE TREES IN MACEDONIA

Defense mechanisms promoting tolerance to aggressive Phytophthora species in hybrid poplar

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