Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

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Найдено документов в текущей БД: 11

    Embryonal development of Siberian pine (Pinus sibirica Du Tour) with the annual cycle of ovulate cone development in the Western Sayan mountains
[Text] / I. N. Tretyakova, N. V. Novoselova, Y. A. Cherepovskii // Russ. J. Plant Physiol. - 2004. - Vol. 51, Is. 1. - P120-126, DOI 10.1023/B:RUPP.0000011312.64979.0d. - Cited References: 12 . - 7. - ISSN 1021-4437
РУБ Plant Sciences

Кл.слова (ненормированные):
Pinus sibirica -- acceleration -- bud -- shoot -- morphogenesis of ovulate cone -- embryological structures

Аннотация: Morphological and cytoembryological studies of unique forms of Siberian pine (Pinus sibirica Du Tour) with the annual cycle of ovulate cone development were carried out. The morphogenesis of female shoots in these anomalous trees with the annual cycle of development was shown to provide for an accelerated development and very rapid growth of megastrobili and accelerated formation of reproductive structures. Cytoembryological studies of ovules in these trees showed significant shortening of the free-nuclear stage of gametophyte development (up to 3 weeks instead of one year) and ultra-early formation of archegonia and egg cells. However, no fertilization of egg cells and the development of embryos occur in the anomalous forms; the egg-cell nucleus divides in the haploid state. Developing seeds are formed without embryo. The author hypothesizes that the acceleration of embryo development in the anomalous pine trees is caused by enhanced hormonal, carbohydrate, and nitrogen metabolism in ovule tissues.

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Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Tretyakova, I.N.; Novoselova, N.V.; Cherepovskii, Y.A.

    Adaptive responses of scots pine to the impact of adverse abiotic factors on the rhizosphere
[Text] / N. E. Sudachkova, I. L. Milyutina, L. I. Romanova // Russ. J. Ecol. - 2009. - Vol. 40, Is. 6. - P387-392, DOI 10.1134/S1067413609060022. - Cited References: 26. - This study was supported by the Russian Foundation for Basic Research, project nos. 07-04-00199 and KKFN 07-04-96816. . - 6. - ISSN 1067-4136
РУБ Ecology

Аннотация: The impact of long-term seasonal soil freezing, drought, and waterlogging on the rhizosphere of young Scots pine trees (Pinus sylvestris L., age class 1) has been simulated in experiments. The results have shown that cold stress exposure leads to reduction of the rates of linear and radial tree growth and of chlorophyll content in needles, a shift in the peak of starch content, and initiation of free amino acid deposition in the aboveground plant parts. Drought activates utilization of carbohydrate reserves and amino acid accumulation in the root bast, whereas soil waterlogging stimulates deposition of carbohydrates but causes a decrease in the levels of chlorophyll and amino acids in all plant tissues.

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Держатели документа:
[Sudachkova, N. E.
Milyutina, I. L.
Romanova, L. I.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Sudachkova, N.E.; Milyutina, I.L.; Romanova, L.I.; Russian Foundation for Basic Research [07-04-00199]; KKFN [07-04-96816]

    Inter-annual and seasonal variability of radial growth, wood density and carbon isotope ratios in tree rings of beech (Fagus sylvatica) growing in Germany and Italy
[Text] / M. V. Skomarkova [et al.] // Trees-Struct. Funct. - 2006. - Vol. 20, Is. 5. - P571-586, DOI 10.1007/s00468-006-0072-4. - Cited References: 55 . - 16. - ISSN 0931-1890
РУБ Forestry

Аннотация: We investigated the variability of tree-ring width, wood density and C-13/C-12 in beech tree rings (Fagus sylvatica L.), and analyzed the influence of climatic variables and carbohydrate storage on these parameters. Wood cores were taken from dominant beech trees in three stands in Germany and Italy. We used densitometry to obtain density profiles of tree rings and laser-ablation-combustion-GC-IRMS to estimate carbon isotope composition (delta C-13) of wood. The sensitivity of ring width, wood density and delta C-13 to climatic variables differed; with tree-ring width responding to environmental conditions (temperature or precipitation) during the first half of a growing season and maximum density correlated with temperatures in the second part of a growing season (July-September). delta C-13 variations indicate re-allocation and storage processes and effects of drought during the main growing season. About 20% of inter-annual variation of tree-ring width was explained by the tree-ring width of the previous year. This was confirmed by delta C-13 of wood which showed a contribution of stored carbohydrates to growth in spring and a storage effect that competes with growth in autumn. Only mid-season delta C-13 of wood was related to concurrent assimilation and climate. The comparison of seasonal changes in tree-ring maximum wood density and isotope composition revealed that an increasing seasonal water deficit changes the relationship between density and C-13 composition from a negative relation in years with optimal moisture to a positive relationship in years with strong water deficit. The climate signal, however, is over-ridden by effects of stand density and crown structure (e.g., by forest management). There was an unexpected high variability in mid season delta C-13 values of wood between individual trees (-31 to -24 parts per thousand) which was attributed to competition between dominant trees as indicated by crown area, and microclimatological variations within the canopy. Maximum wood density showed less variation (930-990 g cm(-3) stop). The relationship between seasonal changes in tree-ring structure and C-13 composition can be used to study carbon storage and re-allocation, which is important for improving models of tree-ring growth and carbon isotope fractionation. About 20-30% of the tree-ring is affected by storage processes. The effects of storage on tree-ring width and the effects of forest structure put an additional uncertainty on using tree rings of broad leaved trees for climate reconstruction.

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Держатели документа:
Max Planck Inst Biogeochem, Jena, Germany
Russian Acad Sci, Inst Forest, SB, Krasnoyarsk 660036, Russia
Univ Calif Berkeley, ESPM Dept, Berkeley, CA 94720 USA

Доп.точки доступа:
Skomarkova, M.V.; Vaganov, E.A.; Mund, M...; Knohl, A...; Linke, P...; Boerner, A...; Schulze, E.D.

    Intra-annual variability of anatomical structure and delta C-13 values within tree rings of spruce and pine in alpine, temperate and boreal Europe
[Text] / E. A. Vaganov [et al.] // Oecologia. - 2009. - Vol. 161, Is. 4. - P729-745, DOI 10.1007/s00442-009-1421-y. - Cited References: 72. - This work was supported by Alexander von Humboldt (Research Award 2003 for E. Vaganov) and the Russian Foundation of Basic Research (RFBR-05-04-48069). We thank Alessandro Cescatti, Leonardo Montagnani, Stefano Minerbi and Claudio Mutinelli for providing the climate and nitrogen data for Renon, Sune Linder for dendrometer data, and Anders Lindroth for eddy flux data of the Flakaliden site. We thank Gerd Gleixner for discussion of this manuscript. We also like to thank Annett Boerner for the artwork and Jens Schumacher for advice on statistical analyses. . - 17. - ISSN 0029-8549
РУБ Ecology

Аннотация: Tree-ring width, wood density, anatomical structure and C-13/C-12 ratios expressed as delta C-13-values of whole wood of Picea abies were investigated for trees growing in closed canopy forest stands. Samples were collected from the alpine Renon site in North Italy, the lowland Hainich site in Central Germany and the boreal Flakaliden site in North Sweden. In addition, Pinus cembra was studied at the alpine site and Pinus sylvestris at the boreal site. The density profiles of tree rings were measured using the DENDRO-2003 densitometer, delta C-13 was measured using high-resolution laser-ablation-combustion-gas chromatography-infra-red mass spectrometry and anatomical characteristics of tree rings (tracheid diameter, cell-wall thickness, cell-wall area and cell-lumen area) were measured using an image analyzer. Based on long-term statistics, climatic variables, such as temperature, precipitation, solar radiation and vapor pressure deficit, explained < 20% of the variation in tree-ring width and wood density over consecutive years, while 29-58% of the variation in tree-ring width were explained by autocorrelation between tree rings. An intensive study of tree rings between 1999 and 2003 revealed that tree ring width and delta C-13-values of whole wood were significantly correlated with length of the growing season, net radiation and vapor pressure deficit. The delta C-13-values were not correlated with precipitation or temperature. A highly significant correlation was also found between delta C-13 of the early wood of one year and the late wood of the previous year, indicating a carry-over effect of the growing conditions of the previous season on current wood production. This latter effect may explain the high autocorrelation of long-term tree-ring statistics. The pattern, however, was complex, showing stepwise decreases as well as stepwise increases in the delta C-13 between late wood and early wood. The results are interpreted in the context of the biochemistry of wood formation and its linkage to storage products. It is clear that the relations between delta C-13 and tree-ring width and climate are multi-factorial in seasonal climates.

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Держатели документа:
[Schulze, Ernst-Detlef
Brand, Willi A.
Roscher, Christiane] Max Planck Inst Biogeochem, D-07701 Jena, Germany
[Vaganov, Eugene A.
Skomarkova, Marina V.] RAS, Inst Forest SB, Krasnoyarsk 660036, Russia
[Knohl, Alexander] ETH, Dept Plant Sci, CH-8092 Zurich, Switzerland

Доп.точки доступа:
Vaganov, E.A.; Schulze, E.D.; Skomarkova, M.V.; Knohl, A...; Brand, W.A.; Roscher, C...; Alexander von Humboldt; Russian Foundation of Basic Research [RFBR-05-04-48069]

    LOCATION OF ARABINOGALACTAN PROTEINS IN XYLEM OF SIBERIAN LARCH
[Text] / G. F. ANTONOVA, V. V. STASOVA // SOVIET PLANT PHYSIOLOGY. - 1990. - Vol. 37, Is. 4. - P547-554. - Cited References: 23 . - 8. - ISSN 0038-5719
РУБ Plant Sciences

Аннотация: We conducted a comparative study on the composition of water soluble carbohydrate-protein complexes of primary cell walls and cytoplasm in xylem cells of Siberian larch (Larix sibirica Ldb.). Preparations were obtained in the process of isolating protoplasts from xylem cells at the stage of elongation. Water-soluble high-molecular-weight compounds were fractionated on DEAE cellulose. It was found that the dominant fraction in composition of these compounds consists of a carbohydrate-protein complex. Comparison of the composition of neutral sugars, uronic acids, and amino acids of these complexes showed that water-soluble arabinogalactan proteins were absent in the cytoplasm, but present in the solution after plasmolysis. They were bound with pectins and arabinoxylans, detected in solutions obtained after isolation and purification of protoplasts, and capable of forming a gel at low water content and low temperature. It is hypothesized that arabinogalactan proteins are components of primary cell walls, that they are located for the most part on the surface, and that their solubility in an aqueous medium depends upon binding with pectins of the middle plate and with other cell wall components.

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Доп.точки доступа:
ANTONOVA, G.F.; STASOVA, V.V.

    Examining the response of needle carbohydrates from Siberian larch trees to climate using compound-specific δ13C and concentration analyses
/ K. T. Rinne [et al.] // Plant Cell Environ. - 2015. - Vol. 38, Is. 11. - P2340-2352, DOI 10.1111/pce.12554 . - ISSN 0140-7791

Кл.слова (ненормированные):
Carbon isotope -- Central Siberia -- Larix gmelinii Rupr. -- Needle sugar concentration -- Larix -- Larix gmelinii

Аннотация: Little is known about the dynamics of concentrations and carbon isotope ratios of individual carbohydrates in leaves in response to climatic and physiological factors. Improved knowledge of the isotopic ratio in sugars will enhance our understanding of the tree ring isotope ratio and will help to decipher environmental conditions in retrospect more reliably. Carbohydrate samples from larch (Larix gmelinii) needles of two sites in the continuous permafrost zone of Siberia with differing growth conditions were analysed with the Compound-Specific Isotope Analysis (CSIA). We compared concentrations and carbon isotope values (δ13C) of sucrose, fructose, glucose and pinitol combined with phenological data. The results for the variability of the needle carbohydrates show high dynamics with distinct seasonal characteristics between and within the studied years with a clear link to the climatic conditions, particularly vapour pressure deficit. Compound-specific differences in δ13C values as a response to climate were detected. The δ13C of pinitol, which contributes up to 50% of total soluble carbohydrates, was almost invariant during the whole growing season. Our study provides the first in-depth characterization of compound-specific needle carbohydrate isotope variability, identifies involved mechanisms and shows the potential of such results for linking tree physiological responses to different climatic conditions. © 2015 John Wiley & Sons Ltd.

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Держатели документа:
Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen, Switzerland
V.N. Sukachev Institute of Forest SB RAS, Akademgorodok, Krasnoyarsk, Russian Federation
Institute of Terrestrial Ecosystems, ETH Zurich, Zurich, Switzerland

Доп.точки доступа:
Rinne, K. T.; Saurer, M.; Kirdyanov, A. V.; Bryukhanova, M. V.; Prokushkin, A. S.; Churakova Sidorova, O. V.; Siegwolf, R.T. W.
577.151.04
Т 35

    Термоустойчивость антиоксидантных ферментов в тканях сосны обыкновенной в условиях теплового шока
[Текст] : научное издание / Н.Е. Судачкова [и др.] // Сибирский лесной журнал. - 2017. - : 1. - С. 4-14 : табл., DOI 10.15372/SJFS20170101. - Библиогр. в конце ст. . - ISSN 2311-1410
   Перевод заглавия: Thermostability of antioxidant enzymes in tissues f scots pine in heat shock conditions
УДК

Аннотация: Исследовали образцы хвои из средней части кроны и соскоб прикамбиальной зоны, включающий клетки камбия и нелигнифицированные клетки ксилемы, с пяти стволов 15-летних деревьев из насаждения сосны обыкновенной <i>Pinus sуlvestris</i> L. зеленомошно-разнотравной группы типов леса на дерново-подзолистой почве в Красноярской лесостепи. Изучали термоустойчивость антиоксидантных ферментов: супероксиддисмутазы (СОД), пероксидазы, каталазы, глутатионредуктазы (ГР); ферментов углеводного и фенольного обмена: амилазы, инвертазы и фенилаланин-аммиак-лиазы (ФАЛ), участвующих в обеспечении ксилогенеза; и маркеров окислительного стресса: пероксида водорода и малонового диальдегида (МДА) в интервале температур 20-80 <sup>о</sup>С. Установлено, что положительный эффект от деятельности антиоксидантных ферментов в основном проявляется до 40 <sup>о</sup>С. С повышением температуры антиоксидантная защита ослабевает. Механизмы возникновения окислительного стресса в прикамбиальной зоне и в хвое в условиях пирогенного теплового шока различаются в связи с различной термостойкостью антиоксидантных ферментов в этих тканях. Наиболее чувствительна к повышению температуры каталаза как в прикамбиальной зоне, так и в хвое. В прикамбиальной зоне низкую устойчивость обнаруживают пероксидаза и ГР, тогда как СОД отличается более высоким уровнем термоустойчивости. В хвое, наоборот, пероксидаза и ГР обнаруживают высокую термоустойчивость, а СОД быстро снижает активность при повышении температуры. Амилаза, инвертаза и ФАЛ по термоустойчивости превосходят исследованные антиоксидантные ферменты, что позволяет после пирогенного теплового шока быстро восстановить углеводный и фенольный обмены для обеспечения ксилогенеза.
Samples of needles from the middle part of the crown and cambial zone scrapings, which includes cambium cells and nonlignified xylem cells from five stems of 15 years old Scots pine <i>Pinus sylvestris</i> L. trees from green moss-forb groups stands on sod-podzolic soil in Krasnoyarsk forest steppe were investigated. Thermal stability of the antioxidant enzymes: superoxide dismutase (SOD), peroxidase, catalase, glutathione reductase (GR); enzymes of carbohydrate and phenolic metabolism: amylase, invertase and phenylalanine ammonia-lyase (PAL) which are involved in providing the xylogenesis process; and markers of oxidative stress: peroxide hydrogen and malondialdehyde (MDA) were studied in the temperature interval 20-80 °C. It was found that the positive effect on the antioxidant enzymes activity mainly manifested up to 40 °C. As the temperature increases, antioxidant protection weakens. The mechanisms of oxidative stress in cambium zone and needles in condition of pyrogenic heat shock are distinguished due to different thermal stability of antioxidant enzymes in these tissues. The most sensitive to elevated temperatures was catalase both in cambium zone and needles. In the cambium zone, peroxidase and GR detect low resistance to high temperature, while SOD has a higher level of. In the needles on the contrary, peroxidase and GR exhibit high thermal stability, whereas SOD activity rapidly reduces at higher temperatures. Amylase, invertase and PAL exceed, according to the thermal stability of examined antioxidant enzymes, what allow quick restoration of carbohydrate and phenolic metabolism after pyrogenic heat shock to providing of xylogenesis process.

РИНЦ

Держатели документа:
Институт леса им. В.Н. Сукачева СО РАН

Доп.точки доступа:
Судачкова, Нина Евгеньевна; Sudachkova, Nina Yevgen'yevna; Романова, Людмила Ивановна; Romanova, Lyudmila Ivanovna; Астраханцева, Наталья Владимировна; Astrakhantseva Natal'ya Vladimirovna; Новоселова, Мария Валерьевна; Novoselova M.V.

    Fate of carbohydrates and lignin in north-east Siberian permafrost soils
/ T. T. Dao [et al.] // Soil Biol. Biochem. - 2018. - Vol. 116. - P311-322, DOI 10.1016/j.soilbio.2017.10.032 . - ISSN 0038-0717
Аннотация: Permafrost soils preserve huge amounts of organic carbon (OC) prone to decomposition under changing climatic conditions. However, knowledge on the composition of soil organic matter (OM) and its transformation and vulnerability to decomposition in these soils is scarce. We determined neutral sugars and lignin-derived phenols, released by trifluoroacetic acid (TFA) and CuO oxidation, respectively, within plants and soil density fractions from the active layer and the upper permafrost layer at three different tundra types (shrubby grass, shrubby tussock, shrubby lichen) in the Northeast Siberian Arctic. The heavy fraction (HF; >1.6 g mL?1) was characterized by a larger enrichment of microbial sugars (hexoses vs. pentoses) and more pronounced lignin degradation (acids vs. aldehydes) as compared to the light fraction (LF; <1.6 g mL?1), showing the transformation from plant residue-dominated particulate OM to a largely microbial imprint in mineral-associated OM. In contrast to temperate and tropical soils, total neutral sugar contents and galactose plus mannose to arabinose plus xylose ratios (GM/AX) decreased in the HF with soil depth, which may indicate a process of effective recycling of microbial biomass rather than utilizing old plant materials. At the same time, lignin-derived phenols increased and the degree of oxidative decomposition of lignin decreased with soil depth, suggesting a selective preservation of lignin presumably due to anaerobiosis. As large parts of the plant-derived pentoses are incorporated in lignocelluloses and thereby protected against rapid decomposition, this might also explain the relative enrichment of pentoses with soil depth. Hence, our results show a relatively large contribution of plant-derived OM, particularly in the buried topsoil and subsoil, which is stabilized by the current soil environmental conditions but may become available to decomposers if permafrost degradation promotes soil drainage and improves the soil oxygen supply. © 2017

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Держатели документа:
Institute of Soil Science, Leibniz University Hannover, Germany
Soil Science and Soil Protection, Martin Luther University Halle-Wittenberg, Germany
VN Sukachev Institute of Forest, Krasnoyarsk, Russian Federation
Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria
Austrian Polar Research Institute, Vienna, Austria
Department of Environmental Science and Analytical Chemistry, Stockholm University, Stockholm, Sweden
Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States
Department of Ecosystem Biology, University of South Bohemia, Ceske Budejovice, Czech Republic
Department of Biology, Centre for Geobiology, University of Bergen, Bergen, Norway
Department of Bioscience, Center for Geomicrobiology, Aarhus, Denmark
Central Siberian Botanical Garden, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
Institute of Microbiology, Ernst-Moritz-Arndt University, Greifswald, Germany

Доп.точки доступа:
Dao, T. T.; Gentsch, N.; Mikutta, R.; Sauheitl, L.; Shibistova, O.; Wild, B.; Schnecker, J.; Barta, J.; Capek, P.; Gittel, A.; Lashchinskiy, N.; Urich, T.; Santruckova, H.; Richter, A.; Guggenberger, G.

    Thermal responses of mountain birch and Siberian larch of an alpine forest-tundra ecotone to climate change
/ E. A. Tyutkova, I. A. Petrov, S. R. Loskutov // J Therm Anal Calor. - 2021, DOI 10.1007/s10973-021-10752-z . - Article in press. - ISSN 1388-6150
Аннотация: We applied thermogravimetric analysis to ten successive growth rings of Siberian larch and the same number of mountain birch individuals sampled in the alpine forest-tundra ecotone of Kuznetsk Ala Tau mountain ridge to compare physical and chemical responses of the species wood to climate change. Our analysis of the correlation of the wood thermal parameters with air temperature and precipitation revealed that early and latewood cellulose and lignin in the birch were more sensitive to climatic changes as compared to the larch. June–August weather conditions appeared to largely control the chemical composition of the birch early and latewood. Air temperature had a marked influence during synthesis of both early and latewood cell walls, whereas precipitation influenced only latewood. Thermogravimetric analysis of growth rings formed in alpine forest-tundra proved to be an effective tool to study the influence of climatic and weather variability on lignin-carbohydrate complex of deciduous and conifer tree species. © 2021, Akademiai Kiado, Budapest, Hungary.

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Держатели документа:
Laboratory of Woody Plant Physical and Chemical Biology, V.N. Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Akademdorodork 50/28, Krasnoyarsk, Russian Federation
Forest Monitoring Laboratory, V.N. Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tyutkova, E. A.; Petrov, I. A.; Loskutov, S. R.

    Thermal responses of mountain birch and Siberian larch of an alpine forest-tundra ecotone to climate change
/ E. A. Tyutkova, I. A. Petrov, S. R. Loskutov // J. Therm. Anal. Calorim. - 2021, DOI 10.1007/s10973-021-10752-z. - Cited References:30 . - Article in press. - ISSN 1388-6150. - ISSN 1588-2926
РУБ Thermodynamics + Chemistry, Analytical + Chemistry, Physical
Рубрики:
PYROLYSIS KINETICS
   COMPONENTS

   CELLULOSE

   WOOD

Кл.слова (ненормированные):
TGA -- Wood Tree rings -- Climate

Аннотация: We applied thermogravimetric analysis to ten successive growth rings of Siberian larch and the same number of mountain birch individuals sampled in the alpine forest-tundra ecotone of Kuznetsk Ala Tau mountain ridge to compare physical and chemical responses of the species wood to climate change. Our analysis of the correlation of the wood thermal parameters with air temperature and precipitation revealed that early and latewood cellulose and lignin in the birch were more sensitive to climatic changes as compared to the larch. June-August weather conditions appeared to largely control the chemical composition of the birch early and latewood. Air temperature had a marked influence during synthesis of both early and latewood cell walls, whereas precipitation influenced only latewood. Thermogravimetric analysis of growth rings formed in alpine forest-tundra proved to be an effective tool to study the influence of climatic and weather variability on lignin-carbohydrate complex of deciduous and conifer tree species.

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Держатели документа:
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Lab Woody Plant Phys & Chem Biol, Akademdorodork 50-28, Krasnoyarsk, Russia.
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Forest Monitoring Lab, Krasnoyarsk, Russia.

Доп.точки доступа:
Tyutkova, E. A.; Petrov, I. A.; Loskutov, S. R.

    Lignin Preservation and Microbial Carbohydrate Metabolism in Permafrost Soils
/ T. T. Dao, R. Mikutta, L. Sauheitl [et al.] // J. Geophys. Res.-Biogeosci. - 2022. - Vol. 127, Is. 1. - Ст. e2020JG006181, DOI 10.1029/2020JG006181. - Cited References:122. - Financial support was provided by the German Federal Ministry of Education and Research (03F0616A) within the ERANET EUROPOLAR project CryoCARB. T.T. Dao is grateful for financial support from Vietnamese Education, O. Shibistova acknowledges funding from the National Science Foundation of China and Russian Foundation for Basic Research (NSFC-RFBR joint project No 19-54-53026), and A. Richter, B. Wild and J. Schnecker appreciate the financial support from the Austrian Science Fund (FWF - I370-B17). We thank all members of the CryoCARB project team for their incredible team spirit. We are grateful to the technical staff of the Institute of Soil Science in Hannover for great laboratory assistance. Open access funding enabled and organized by Projekt DEAL. . - ISSN 2169-8953. - ISSN 2169-8961
РУБ Environmental Sciences + Geosciences, Multidisciplinary

Аннотация: Permafrost-affected soils in the northern circumpolar region store more than 1,000 Pg soil organic carbon (OC), and are strongly vulnerable to climatic warming. However, the extent to which changing soil environmental conditions with permafrost thaw affects different compounds of soil organic matter (OM) is poorly understood. Here, we assessed the fate of lignin and non-cellulosic carbohydrates in density fractionated soils (light fraction, LF vs. heavy fraction, HF) from three permafrost regions with decreasing continentality, expanding from east to west of northern Siberia (Cherskiy, Logata, Tazovskiy, respectively). In soils at the Tazovskiy site with thicker active layers, the LF showed smaller OC-normalized contents of lignin-derived phenols and plant-derived sugars and a decrease of these compounds with soil depth, while a constant or even increasing trend was observed in soils with shallower active layers (Cherskiy and Logata). Also in the HF, soils at the Tazovskiy site had smaller contents of OC-normalized lignin-derived phenols and plant-derived sugars along with more pronounced indicators of oxidative lignin decomposition and production of microbial-derived sugars. Active layer deepening, thus, likely favors the decomposition of lignin and plant-derived sugars, that is, lignocelluloses, by increasing water drainage and aeration. Our study suggests that climate-induced degradation of permafrost soils may promote carbon losses from lignin and associated polysaccharides by abolishing context-specific preservation mechanisms. However, relations of OC-based lignin-derived phenols and sugars in the HF with mineralogical properties suggest that future OM transformation and carbon losses will be modulated in addition by reactive soil minerals.

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Держатели документа:
Leibniz Univ Hannover, Inst Soil Sci, Hannover, Germany.
Martin Luther Univ Halle Wittenberg, Soil Sci & Soil Protect, Halle, Germany.
VN Sukachev Inst Forest, Krasnoyarsk, Russia.
Univ Vienna, Dept Microbiol & Ecosyst Sci, Vienna, Austria.
Stockholm Univ, Dept Environm Sci & Analyt Chem, Stockholm, Sweden.
Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden.
Univ South Bohemia, Dept Ecosyst Biol, Ceske Budejovice, Czech Republic.
Univ South Bohemia, Fac Sci, Ctr Polar Ecol, Ceske Budejovice, Czech Republic.
Univ Bergen, Ctr Geobiol, Dept Biol, Bergen, Norway.
Ctr Geomicrobiol, Dept Biosci, Aarhus, Denmark.
Russian Acad Sci, Cent Siberian Bot Garden, Siberian Branch, Novosibirsk, Russia.
Ernst Moritz Arndt Univ, Inst Microbiol, Greifswald, Germany.
Austrian Polar Res Inst, Vienna, Austria.

Доп.точки доступа:
Dao, Thao Thi; Mikutta, Robert; Sauheitl, Leopold; Gentsch, Norman; Shibistova, Olga; Wild, Birgit; Schnecker, Joerg; Barta, Jiri; Capek, Petr; Gittel, Antje; Lashchinskiy, Nikolay; Urich, Tim; Santruckova, Hana; Richter, Andreas; Guggenberger, Georg; German Federal Ministry of Education and Research within the ERANET EUROPOLAR project CryoCARB [03F0616A]; Vietnamese Education; National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [19-54-53026]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-54-53026]; Austrian Science FundAustrian Science Fund (FWF) [FWF - I370-B17]; Projekt DEAL