MALDI-TOF Analysis of Aleppo Pine (Pinus halepensis) Bark Tannin

Abdalla, S.; Pizzi, A.; Ayed, Naceur; Bouthoury, Fatima Charrier-El; Charrier, Bertrand; Bahabri, F.S.; Ganash, Aisha A.

doi:10.15376/biores.9.2.3396-3406

Cited by 35 publications

(19 citation statements)

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“…The total amount of soluble phenolics was estimated by the Folin–Ciocalteu method using gallic acid as standard [ 38 ]. Total flavonoids were quantified by an aluminium chloride colorimetric assay using catechin as a standard [ 39 ] and the proanthocyanidins content (condensed tannins) was determined by the vanillin-H 2 SO 4 method using catechin as a standard [ 40 ]. The experimental procedure is described in detail in [ 30 ].…”

Section: Methodsmentioning

confidence: 99%

Bark anatomy, chemical composition and ethanol-water extract composition of Anadenanthera peregrina and Anadenanthera colubrina

et al. 2017

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The bark of Anadenanthera peregrina (L.) Speg and Anadenanthera colubrina (Vell.) Brenan were characterized in relation to anatomical and chemical features. The barks were similar and included a thin conducting phloem, a largely dilated and sclerified non-conducting phloem, and a rhyridome with periderms with thin phellem interspersed by cortical tissues. Only small differences between species were observed that cannot be used alone for taxonomic purposes. The summative chemical composition of A. peregrina and A. colubrina was respectively: 8.2% and 7.7% ash; 28.8% and 29.3% extractives; 2.4% and 2.6% suberin; and 18.9% lignin. The monosaccharide composition showed the predominance of glucose (on average 82% of total neutral sugars) and of xylose (9%). The ethanol-water extracts of A. peregrina and A. colubrina barks included a high content of phenolics, respectively: total phenolics 583 and 682 mg GAE/g extract; 148 and 445 mg CE/g extract; tannins 587 and 98 mg CE/g extract. The antioxidant activity was 238 and 269 mg Trolox/g extract. The barks of the Anadenanthera species are a potential source of polar extractives that will represent an important valorization and therefore contribute to improve the overall economic potential and sustainability of A. peregrina and A. colubrina

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Section: Methodsmentioning

confidence: 99%

Bark anatomy, chemical composition and ethanol-water extract composition of Anadenanthera peregrina and Anadenanthera colubrina

et al. 2017

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“…Total flavonoid content of each extract was determined by an aluminium chloride colorimetric assay (Luis et al ., ), and results expressed as g of (+)‐catechin equivalents (CE) per g in phloem extract. Tannin content was determined by the vanillin‐H 2 SO 4 method (Abdalla et al ., ) and results were expressed as g of (+)‐catechin equivalents (CE) per 100 g in phloem extract. Low molecular weight carbohydrate content in phloem ethanolic extract was determined by a phenol‐sulphuric acid assay (Dubois et al ., ), and results were expressed as percentage of d ‐glucose in phloem extract.…”

Section: Methodsmentioning

confidence: 99%

Pinewood nematode population growth in relation to pine phloem chemical composition

et al. 2016

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The pinewood nematode, Bursaphelenchus xylophilus, native to North America (NA), is now a major invasive pine pest in Eurasia. Pine species differ greatly in their susceptibility to B. xylophilus, and differences in susceptibility might be related to differences in phytochemistry. This study addressed two major questions: (i) which plant chemical profiles (including compounds that act as plant defences and those important for nutrition) favour pinewood nematode development; and (ii) are NA and Portuguese pinewood nematodes different in their capacity to subsist on plant tissues? For this, B. xylophilus isolates from NA and Portugal were tested on pine phloem and xylem of different pine species. It was found that unaltered pine phloem can sustain the population growth of B. xylophilus, but only in a few cases, and this was clearly related to distinct chemical profiles in some pine species. No evidence was found of evolutionary divergence between B. xylophilus populations in Portugal and NA. The pine species with phloem on which pinewood nematodes could grow tended to have low levels of total phenols, condensed tannins, flavonoids and lignin. Evidence was also found that nutrients such as N may be important.

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“…Total flavonoids were quantified by an aluminium chloride colorimetric assay, and the results were expressed as mg of (+)-catechin equivalents on a dry extract base (Jia et al 1999, Miranda et al 2016. Tannin content was determined by the vanillin-H2SO4 method, and the results were expressed as mg of (+)-catechin equivalents on a dry extract base (Abdalla et al 2014, Miranda et al 2016.…”

Section: Ethanol-water Extractsmentioning

confidence: 99%

Chemical characterization, hardness and termite resistance of Quercus cerris heartwood from Kosovo

Bajraktari

Nunes

Knapic

et al. 2018

Maderas, Cienc. tecnol.

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Quercus cerris, the Turkey oak, is an oak species native to southern central and southeastern Europe, extending into southwestern Asia. It is present in a large extent in the forests of the Republic of Kosovo, and at present used mainly for bio-energy. The potential use of Quercus cerris wood for construction and higher value wood products has been investigated in the last years. However limited information is available on wood characteristics and performance, mainly regarding chemical composition and durability. The heartwood of Quercus cerris taken from 70-90 year-old trees grown in two sites in Kosovo was studied regarding resistance to termite attack, chemical composition and hardness. The heartwood contained only 6,7% extractives, with a small content of tannins. The wood density was on average 0,81 at 12% moisture content and Brinell hardness 36,2 MPa. It was classified as not durable against subterranean termites and therefore not suitable for external use in ground contact in termite areas unless adequately protected. Nevertheless, Quercus cerris wood showed adequate hardness and density for interior uses like flooring for domestic and commercial applications with moderate use.

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MALDI-TOF Analysis of Aleppo Pine (Pinus halepensis) Bark Tannin

Cited by 35 publications

References 0 publications

Bark anatomy, chemical composition and ethanol-water extract composition of Anadenanthera peregrina and Anadenanthera colubrina

Bark anatomy, chemical composition and ethanol-water extract composition of Anadenanthera peregrina and Anadenanthera colubrina

Pinewood nematode population growth in relation to pine phloem chemical composition

Chemical characterization, hardness and termite resistance of Quercus cerris heartwood from Kosovo

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