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<dc:title xml:lang="en">Polyphenol Diversity and Chemotype Variation in Origanum majorana and Related Species: Implications for Chemotaxonomic Differentiation, Standardisation and Genotype Selection</dc:title>

  
<dc:description xml:lang="en">This study presents a multivariate assessment of the qualitative and quantitative composition of polyphenolic compounds across six Origanum species, including wild and commercial O. majorana, the three other species of section Majorana (O. dubium, O. syriacum and O. onites), and the more distantly related O. minutiflorum and O. vulgare. Methanolic extracts from 657 plants representing 59 populations were analysed by HPLC. A total of 122 constituents were consistently detected, 20 major peaks were selected for detailed evaluation, and eight key constituents were quantified using external standards. Wild O. majorana was characterised by high proportions of arbutin, apigenin 6,8-di-glucopyranoside, luteolin 7-glucuronide, apigenin 7-glucuronide, rosmarinic acid, salvianolic acid B, blumeatin, and two additional flavonoid-like constituents requiring further structural elucidation. Principal component analysis separated wild and commercial O. majorana and distinguished O. majorana, the three overlapping clusters of O. onites, O. dubium and O. syriacum, as well as O. minutiflorum and O. vulgare, reflecting marked interspecific differences in dominant compound classes. Origanum majorana and O. vulgare were richer in phenolic acids, whereas O. dubium, O. syriacum, and O. onites contained higher levels of flavonoid glycosides. Several genotypes accumulated exceptionally high concentrations of arbutin, apigenin 6,8-di-glucopyranoside, rosmarinic acid, or salvianolic acid B. These results establish a robust chemotaxonomic framework for distinguishing Origanum species and pinpoint high polyphenol genotypes as candidates for breeding, quality standardisation, and targeted follow-up studies on antioxidant and other bioactivities.</dc:description>

  
<dc:identifier>https://phaidra.vetmeduni.ac.at/o:5606</dc:identifier>

  
<dc:language>en</dc:language>

  
<edm:type>TEXT</edm:type>

  
<dc:type>journal article</dc:type>

  
<dc:type>Wissenschaftlicher Artikel</dc:type>

  
<dc:type>Articolo scientifico</dc:type>

  
<dc:type xml:lang="en">Text</dc:type>

  
<dc:type xml:lang="en">journal article</dc:type>

  
<dc:type xml:lang="it">Documento PDF</dc:type>

  
<dc:type xml:lang="it">Articolo scientifico</dc:type>

  
<dc:type xml:lang="de">Text</dc:type>

  
<dc:type xml:lang="de">Wissenschaftlicher Artikel</dc:type>

  
<dc:subject xml:lang="en">Origanum majorana</dc:subject>

  
<dc:subject xml:lang="en">polyphenols</dc:subject>

  
<dc:subject xml:lang="en">phytochemical profiling</dc:subject>

  
<dc:subject xml:lang="en">chemotype variation</dc:subject>

  
<dc:subject xml:lang="en">chemotaxonomy</dc:subject>

  
<dc:subject xml:lang="en">HPLC analysis</dc:subject>

  
<dc:subject xml:lang="en">genotype selection</dc:subject>

  
<dcterms:issued>2026</dcterms:issued>

  
<dc:date>2026</dc:date>

  
<dc:creator>Brigitte Lukas</dc:creator>

  
<dc:creator>Johannes Novak (Centre for Animal Nutrition and Welfare, Clinical Department for Farm Animals and Food System Transformation, Departments, University of Veterinary Medicine Vienna)</dc:creator>

  
<dc:creator>Magdalena Neumüller</dc:creator>

  
<dc:creator>Jennifer Romana Valek</dc:creator>

  
<dc:creator>Salme Ahmed</dc:creator>

  
<dc:creator>Zehra Aytaç</dc:creator>

  
<dc:creator>Ahmet Gümüşçü</dc:creator>

  
<dc:publisher>MDPI</dc:publisher>

  
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