In vitro inhibition of extractives from knotwood of Scots pine (Pinus sylvestris) and black pine (Pinus nigra) on growth of Schizophyllum commune, Trametes versicolor, Gloeophyllum trabeum and Fibroporia vaillantii

Vek, Viljem; Poljanšek, Ida; Humar, Miha; Willför, Stefan; Oven, Primož

doi:10.1007/s00226-020-01229-7

Cited by 28 publications

(23 citation statements)

References 64 publications

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“…For instance, pterostilbene has been shown to be 5-10 times more active than non-methylated resveratrol in inhibiting the germination of downy mildew (Plasmopara viticola) sporangia and grey mold (Botrytis cinerea) conidia [120]. Pinosylvin monomethyl ether has been reported to have significantly lower antifungal and antibacterial activity than pinosylvin [121], although it has shown greater activity against some brown-rot fungi [122].…”

Section: Methylationmentioning

confidence: 99%

Impact of Environmental Factors on Stilbene Biosynthesis

Valletta

Iozia

Leonelli

2021

Plants

119

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Stilbenes are a small family of polyphenolic secondary metabolites that can be found in several distantly related plant species. These compounds act as phytoalexins, playing a crucial role in plant defense against phytopathogens, as well as being involved in the adaptation of plants to abiotic environmental factors. Among stilbenes, trans-resveratrol is certainly the most popular and extensively studied for its health properties. In recent years, an increasing number of stilbene compounds were subjected to investigations concerning their bioactivity. This review presents the most updated knowledge of the stilbene biosynthetic pathway, also focusing on the role of several environmental factors in eliciting stilbenes biosynthesis. The effects of ultraviolet radiation, visible light, ultrasonication, mechanical stress, salt stress, drought, temperature, ozone, and biotic stress are reviewed in the context of enhancing stilbene biosynthesis, both in planta and in plant cell and organ cultures. This knowledge may shed some light on stilbene biological roles and represents a useful tool to increase the accumulation of these valuable compounds.

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Section: Methylationmentioning

confidence: 99%

Impact of Environmental Factors on Stilbene Biosynthesis

Valletta

Iozia

Leonelli

2021

Plants

119

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“…According to [24] effects of extracts on B. dothidea mycelium growth are considered as little toxic, while the same treatments showed a moderately toxic effect on D. sarmentorum growth. Similarly, hydrophilic extracts of P. sylvestris applied in 1% concentration caused little toxicity towards Schizophyllum commune (48.00%), Gloeophyllum trabeum (49.14%), and Fibroporia vaillantii (47.03%), while 5% concentration was classified as moderately toxic in all three cases with inhibition percentage over 55% [28]. Pinus sylvestris bark extracts showed no inhibition of radial growth of N. parvum, but the sparse aerial mycelium was noted.…”

Section: Resultsmentioning

confidence: 93%

Potential of Trichoderma spp. and Pinus sylvestris Bark Extracts as Biocontrol Agents against Fungal Pathogens Residing in the Botryosphaeriales

Karličić

Jovičić-Petrović

Marojević

et al. 2020

The 1st International Electronic Conference on Forests—Forests for a Better Future: Sustainability, Innovation, Inter

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The Botryosphaeriales represents a diverse order of fungal pathogens of various woody plant species. In Serbia, these fungi are important pathogens of forest, ornamental and fruit trees causing die-back, cankers, leaf blights, fruit, and root rot. The aim of this study was to evaluate the antifungal activity of Pinus sylvestris bark extracts and Trichoderma spp. against Botryosphaeria dothidea, Dothiorella sarmentorum and Neofusicoccum parvum (Ascomycota: Botryosphaeriales) isolated from Picea abies, Thuja occidentalis and Prunus laurocerasus trees planted in urban areas in Serbia. Bark extracts were prepared in water solution at two temperatures (80 and 120 ºC). The extracts were tested using two concentrations (20 and 30%). Moreover, two Trichoderma isolates obtained from P. sylvestris bark were tested against Botryosphaeriales and their antagonistic potential was estimated in vitro using a confrontation test. Mycelial growth of B. dothidea and D. sarmentorum was significantly inhibited in the presence of bark extracts, while N. parvum showed no growth inhibition. Botryosphaeria dothidea growth was inhibited by 35 to 39% in the case of 20% extracts and by 39 to 44% in the case of 30% extracts. The growth inhibition of D. sarmentorum was between 48 to 56% in the case of 20% extracts and 53 to 60% in the case of 30% extracts. The two Trichoderma isolates showed antifungal activity against the selected pathogens. An isolate BKG 4 showed the highest inhibition level and it inhibited the growth of B. dothidea, D. sarmentorum and N. parvum by 85, 75 and 62%, respectively. Preliminary results suggest that both P. sylvestris bark extracts and Trichoderma spp. could be used as biocontrol agents against B. dothidea, D. sarmentorum and N. parvum, and this deserves a further study.

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“…This includes phosphocholine, riboluse diphosphate, and gibberelins involved in plant metabolism, and wood extractives such as arginine, flavonoids (e.g., catechins, hydroxytrimethoxyflavan), coumarin, and phenolics. Wood extractives are secondary metabolites in plants and many of these compounds (e.g., tannins, tropolones) contribute to the natural durability of wood [29,30]. These extractives such as LMW phenolics, however, can also be employed by fungi to reduce iron and drive the generation of reactive oxygen species (e.g., HO• via Fenton reaction) for lignocellulose degradation [31].…”

Section: Early Aromaticsmentioning

confidence: 99%

Using MALDI-FTICR-MS Imaging to Track Low-Molecular-Weight Aromatic Derivatives of Fungal Decayed Wood

Veličković

Zhou

Schilling

et al. 2021

JoF

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Low-molecular-weight (LMW) aromatics are crucial in meditating fungal processes for plant biomass decomposition. Some LMW compounds are employed as electron donors for oxidative degradation in brown rot (BR), an efficient wood-degrading strategy in fungi that selectively degrades carbohydrates but leaves modified lignins. Previous understandings of LMW aromatics were primarily based on “bulk extraction”, an approach that cannot fully reflect their real-time functions during BR. Here, we applied an optimized molecular imaging method that combines matrix-assisted laser desorption ionization (MALDI) with Fourier-transform ion cyclotron resonance mass spectrometry (FTICR-MS) to directly measure the temporal profiles of BR aromatics as Rhodonia placenta decayed a wood wafer. We found that some phenolics were pre-existing in wood, while some (e.g., catechin-methyl ether and dihydroxy-dimethoxyflavan) were generated immediately after fungal activity. These pinpointed aromatics might be recruited to drive early BR oxidative mechanisms by generating Fenton reagents, Fe2+ and H2O2. As BR progressed, ligninolytic products were accumulated and then modified into various aromatic derivatives, confirming that R. placenta depolymerizes lignin. Together, this work confirms aromatic patterns that have been implicated in BR fungi, and it demonstrates the use of MALDI-FTICR-MS imaging as a new approach to monitor the temporal changes of LMW aromatics during wood degradation.

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In vitro inhibition of extractives from knotwood of Scots pine (Pinus sylvestris) and black pine (Pinus nigra) on growth of Schizophyllum commune, Trametes versicolor, Gloeophyllum trabeum and Fibroporia vaillantii

Cited by 28 publications

References 64 publications

Impact of Environmental Factors on Stilbene Biosynthesis

Impact of Environmental Factors on Stilbene Biosynthesis

Potential of Trichoderma spp. and Pinus sylvestris Bark Extracts as Biocontrol Agents against Fungal Pathogens Residing in the Botryosphaeriales

Using MALDI-FTICR-MS Imaging to Track Low-Molecular-Weight Aromatic Derivatives of Fungal Decayed Wood

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