Headspace volatiles isolated from twigs of Picea omorika from Serbia

This work is focused on nine Heracleum taxa (Apiaceae): H. sphondylium, H. sibiricum, H. montanum, H. ternatum, H. pyrenaicum subsp. pollinianum, H. pyrenaicum subsp. orsinii and H. verticillatum, belonging to the H. sphondylium group, and H. orphanidis, all from sect. Heracleum, as well as H. austriacum subsp. siifolium from sect. Wendia. The aim was to isolate the headspace (HS) fractions from 17 fruit samples (collected from all nine Heracleum taxa) and 13 root samples (collected from all eight taxa belonging to sect. Heracleum), to investigate their composition and chemosystematic significance, as well as to compare these results with those previously obtained for the essential oils isolated by hydrodistillation from the same fruit and root samples. The HS fractions were isolated using an automatic static HS sampler and analysed by GC-FID and GC-MS. The fruit HS fractions were dominated by octyl acetate and/or ?-pinene (the taxa from the sect. Heracleum), or n-octanol (H. austriacum), whereas the root HS fractions mainly contained ?-pinene and/or (Z)-?-ocimene (the taxa from the H. sphondylium group), or n-nonane (H. orphanidis). The chemosystematic significance was evaluated using multivariate statistical methods: principal component analysis (PCA), non-metric multidimensional scaling (nMDS) and agglomerative hierarchical clustering based on the unweighted pair-group arithmetic average (UPGMA) algorithm. As in the case of previously investigated essential oils, the statistical analysis of the fruit and root HS fractions generally resulted in the grouping of the investigated H. sphondylium group representatives, and within this group, the grouping of morphologically related H. sphondylium and H. montanum and the isolated position of H. verticillatum. The statistical analysis of the root HS fractions resulted in better separation of the taxa (even compared to previous analysis of the essential oils), i.e. isolated positions of H. ternatum and H. pyrenaicum were observed.

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Chemical composition and chemosystematic evaluation of the fruit and root headspace fractions of selected Heracleum taxa from southeastern Europe

Ušjak

Drobac

Niketić

et al. 2022

Bot Serb

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Morpho-Anatomical Characteristics and Volatile Profiles of Pinus nigra J.F.Arnold from the Balkan Peninsula and Southern Carpathians

Mitić,

Nikolić,

Stojković

et al. 2024

Forests

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This is the first report on morpho-anatomical and phytochemical differentiation of 19 native populations representing different Pinus nigra J.F.Arnold subspecies (banatica (Borbás) Novák, dalmatica (Vis.) Franco, nigra, and pallasiana (Lamb.) Holmboe) in the Balkans and Southern Carpathians. The 9 morpho-anatomical characteristics and 10 headspace volatiles of needles were analyzed with multivariate statistical analyses. The combination of results from all multivariate analyses with both types of markers revealed that P. nigra is differentiated into three groups within the studied area (the Dalmatian coast, Greece, and the rest of the Balkans with the Southern Carpathians). The first group included the population from an island in Dalmatia that corresponds to P. nigra subsp. dalmatica. The third group consisted of populations from continental Croatia, Bosnia and Herzegovina, Serbia, Romania, and Bulgaria, which corresponds to P. nigra subsp. nigra. In light of the recent molecular data that indicated that the Greek populations (the second group) represent a distinct genetic lineage of P. nigra placed between the populations from the principal area (P. nigra subsp. nigra) and Turkey (P. nigra subsp. pallasiana), one can speculate that there is one more subspecies of P. nigra in this region that corresponds to populations from Greece. Extending our analyses to Asia Minor and Crimea could bring additional results that would be valuable for clarifying the intriguing issue of the diversification of P. nigra in the eastern part of its range.

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Emission of Fire-Promoting Volatiles from Picea omorika (Pančić) Purk Needles in Different Forest Communities

Vidaković,

Popović

2024

Forests

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The importance of studying the role of volatiles in flammability is well recognized, but the relationship between specific compounds and components of flammability is underestimated. In this study, volatiles emitted from Picea omorika (Pančić) Purk. Needles were identified and quantified, and the relationship between volatile emission and moisture content, flammability characteristics and bioclimatic coefficients was investigated. Fresh needles from four different forest communities were analyzed for specific volatile organic compounds (using a gas chromatography-surface acoustic wave analyzer, GC-SAW), moisture content (based on fresh and oven-dried mass), and flammability components (using an epiradiator). Five monoterpenes, one sesquiterpene, and one alcohol were identified and their amounts, moisture content, and flammability components differed between the populations. The amounts of myrcene and β-pinene correlated significantly with moisture content and time to ignition. Myrcene content also correlated with flame duration, site altitude, mean annual temperature, variation in mean annual temperature, and the Ellenberg quotient. The emission of myrcene correlates with ecophysiological, flammability, topographic, and climatic variables. This suggests that myrcene-rich plant species may be of particular interest for research into flammability, especially from the point of view of rapid ignition.

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Headspace volatiles isolated from twigs of Picea omorika from Serbia

Cited by 4 publications

References 21 publications

Chemical composition and chemosystematic evaluation of the fruit and root headspace fractions of selected Heracleum taxa from southeastern Europe

Chemical composition and chemosystematic evaluation of the fruit and root headspace fractions of selected Heracleum taxa from southeastern Europe

Morpho-Anatomical Characteristics and Volatile Profiles of Pinus nigra J.F.Arnold from the Balkan Peninsula and Southern Carpathians

Emission of Fire-Promoting Volatiles from Picea omorika (Pančić) Purk Needles in Different Forest Communities

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