DYNAMICS OF TWO-YEAR POST-PYROGENIC RESTORATION OF THE COMPOSITION OF BIOMOLECULES IN SHRUBS IN THE SOUTHERN TAIGA OF THE TOMSK REGION

IF 0.4 Q4 CHEMISTRY, MULTIDISCIPLINARY Chemistry for Sustainable Development Pub Date : 2024-06-14 DOI:10.15372/csd2024547
 V. RUSSKIKH I,  B. STRELNIKOVA E
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Abstract

The dynamics of the composition of biomolecules in the leaves of Caragana arborescens and Sorbus aucuparia shrubs, typical of the South taiga natural climatic zone, was studied by gas chromatography - mass spectrometry in the process of post-pyrogenic restoration at the territory the Golovina village, the Tomsk Region, 3 months, 1 year and 2 years after the fire event. Acyclic organic compounds have been identified: n-alkanes, fatty acids, n-alkane-2-ones, aldehydes, n-alkanols. The long-chain saturated alcohol 10-nonacosanol was found in the leaves of Sorbus aucuparia. Aliphatic diterpenoids phytone and the isomers of phytol, triterpene squalene, as well as naphthenoaromatic compounds vitamin E (tocopherol) and vitamin K1 (phytanodione) were detected among isoprenoid structures in the leaves of S. aucuparia, increased phytol and fatty acid levels are observed in the leaves of S. aucuparia 3 months and 1 year after the fire event, and then the concentrations of these compounds decrease to background values after 2 years. Squalene content in the leaves of S. aucuparia, which decreased as a result of the fire event, increased sharply the following year, and after 2 years, it still remained at a level significantly higher than the background. The fire had the greatest impact on the long-chain alcohol 10-nonacosanol, which was detected in large amounts in the leaves of S. aucuparia. As a result of the fire, there is a drop in its content to trace amounts, followed by a slight increase the following year and an abrupt increase up to background values after 2 years. During the two-year-long post-pyrogenic restoration, changes in the molecular mass distribution of acyclic compounds are observed. The leaves of S. aucuparia, sampled 3 months and the following year after the fire, exhibited a shift from higher molecular homologues to less higher molecular n-alkanes and n-aldehydes in comparison with the leaves from background sites, while the corresponding shift observed in C. arborescens related to n-alkane-2-ones. The distribution of acyclic compounds in the post-pyrogenic area approaches the background level 2 years after the fire.
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托木斯克地区南部泰加林灌木生物大分子组成两年后的恢复动态
通过气相色谱-质谱法研究了托木斯克地区格洛维那村(Golovina)境内典型的南泰加自然气候区灌木 Caragana arborescens 和 Sorbus aucuparia 在火灾后 3 个月、1 年和 2 年的恢复过程中生物分子组成的动态。已确定的无环有机化合物有:正烷烃、脂肪酸、正烷-2-酮、醛、正烷醇。在山梨叶中发现了长链饱和醇 10-壬醇。在杜仲叶片的异戊二烯结构中检测到脂肪族二萜植物酮和植物醇的异构体、三萜类角鲨烯以及萘芳香族化合物维生素 E(生育酚)和维生素 K1(植物酮)。由于火灾事件而减少的角鲨烯含量在第二年急剧增加,2 年后仍明显高于背景值。火灾对长链醇 10-nonacosanol 的影响最大,在 S. aucuparia 的叶子中检测到了大量这种物质。火灾导致其含量下降到微量,第二年略有上升,两年后又突然上升到背景值。在长达两年的火烧后恢复期间,观察到无环化合物的分子质量分布发生了变化。火灾后 3 个月和次年取样的 S. aucuparia 叶片与背景地点的叶片相比,表现出从高分子同系物向低分子正烷烃和正醛类化合物的转变,而在 C. arborescens 中观察到的相应转变与正烷烃-2-酮有关。火灾发生 2 年后,火灾后地区的无环化合物分布接近本底水平。
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来源期刊
Chemistry for Sustainable Development
Chemistry for Sustainable Development CHEMISTRY, MULTIDISCIPLINARY-
自引率
25.00%
发文量
52
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