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  1. AU="Takayoshi Koike"
  2. AU="Alireza Choobineh"
  3. AU="Michael J. Sadowsky"
  4. AU=Jatt Lauren P
  5. AU=Couser W G
  6. AU="Yingjie Xiao"
  7. AU="Hyunghee Lee"
  8. AU=Seif Sherif AU=Seif Sherif
  9. AU=Rajput Dinesh Vijay
  10. AU="Nilsson, Lovisa"
  11. AU="Wijns, Julie"
  12. AU="Gutiérrez Tolentino, Rey"
  13. AU="Reuss, Annette"
  14. AU=Cook Rebecca
  15. AU="Zhu, Tianhui"
  16. AU=Li Liwu
  17. AU="Akamine, Yuko"
  18. AU=Pereira Carlos
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  20. AU=Rodrguez-Garca-de-Cortzar Ainhoa AU=Rodrguez-Garca-de-Cortzar Ainhoa
  21. AU="Eltan, Sevgi Bilgic"
  22. AU=Shibley I A Jr
  23. AU="Shin Ohta"
  24. AU="Herrera, José M."
  25. AU="Bolanle, Ogunyemi Folasade"
  26. AU="Spezialetti, Matteo"
  27. AU=Rosas Lucia E
  28. AU="Spadotto, Valeria"
  29. AU="Jimenez-Macias, Jorge L"

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  1. Artikel ; Online: Developing Ozone Risk Assessment for Larch Species

    Yasutomo Hoshika / Elena Paoletti / Evgenios Agathokleous / Tetsuto Sugai / Takayoshi Koike

    Frontiers in Forests and Global Change, Vol

    2020  Band 3

    Abstract: Ozone (O3) risk assessment for the protection of forests requires species-specific critical levels (CLs), based on either O3 concentrations (AOT40) or stomatal uptake (PODY) accumulation over the growing season. Larch (Larix sp.) is a genus with O3- ... ...

    Abstract Ozone (O3) risk assessment for the protection of forests requires species-specific critical levels (CLs), based on either O3 concentrations (AOT40) or stomatal uptake (PODY) accumulation over the growing season. Larch (Larix sp.) is a genus with O3-susceptible species, widely distributed in the northern hemisphere and with global economic importance. We analyzed published and unpublished data of Japanese larch (Larix kaempferi) and its hybrid F1 (Larix gmelinii var. japonica × L. kaempferi) stomatal responses for developing a parameterization of stomatal conductance model and estimating PODY-based CLs with two Y thresholds, that is, 0 and 1 nmol m–2 s–1 projected leaf area (PLA). In parallel, we estimated AOT40-based CLs. The results show that the AOT40-based CLs for a 2% and 4% biomass loss in Japanese larch were 5.79 and 11.59 ppm h, that is, higher than those in hybrid larch F1 (2.18 and 4.36 ppm h AOT40), suggesting a higher O3 susceptibility of the hybrid. However, the use of PODY reconciled the species-specific differences, because the CLs were similar, that is, 9.40 and 12.00 mmol m–2 POD0 and 2.21 and 4.31 mmol m–2 POD1 in Japanese larch versus 10.44 and 12.38 mmol m–2 POD0 and 2.45 and 4.19 mmol m–2 POD1 in the hybrid, for 2% and 4% biomass loss, respectively. Overall, the CLs were lower than those in other forest species, which suggests a relatively high susceptibility of these larches. These results will inform environmental policy-makers and modelers about larch susceptibility to O3.
    Schlagwörter critical level ; DO3SE model ; forest ; larch ; parameterization ; tropospheric ozone ; Forestry ; SD1-669.5 ; Environmental sciences ; GE1-350
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2020-05-01T00:00:00Z
    Verlag Frontiers Media S.A.
    Dokumenttyp Artikel ; Online
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  2. Artikel ; Online: Effects of Elevated CO 2 and Nitrogen Loading on the Defensive Traits of Three Successional Deciduous Broad-Leaved Tree Seedlings

    Yoko Watanabe / Kiyomi Hinata / Laiye Qu / Satoshi Kitaoka / Makoto Watanabe / Mitsutoshi Kitao / Takayoshi Koike

    Forests, Vol 12, Iss 939, p

    2021  Band 939

    Abstract: To elucidate changes in the defensive traits of tree seedlings under global environmental changes, we evaluated foliar defensive traits of the seedlings of successional trees, such as beech, oak, and magnolia grown in a natural-light phytotron. Potted ... ...

    Abstract To elucidate changes in the defensive traits of tree seedlings under global environmental changes, we evaluated foliar defensive traits of the seedlings of successional trees, such as beech, oak, and magnolia grown in a natural-light phytotron. Potted seedlings were grown under the combination of two CO 2 concentrations (360 vs. 720 ppm) and two nitrogen (N) treatments (4 vs. 15 kg N ha −1 yr −1 ) for two growing seasons using quantitative chemical analyses and anatomical method. We hypothesized that the effects of CO 2 and N depend on the successional type, with late successional species providing greater defense of their leaves against herbivores, as this species exhibits determinate growth. Beech, a late successional species, responded the most to both elevated CO 2 concentration (eCO 2 ) and high N treatment. eCO 2 and low N supply enhanced the defensive traits, such as the high leaf mass per area (LMA), high carbon to N ratio (C/N ratio), and increase in the concentrations of total phenolic and condensed tannin in agreement with the carbon–nutrient balance (CNB) hypothesis. High N supply decreased the C/N ratio due to the high N uptake in beech leaves. Oak, a mid–late successional species, exhibited different responses from beech: eCO 2 enhanced the LMA, C/N ratio, and concentration of total phenolics of oak leaves, but only condensed tannin increased under high N supply. Magnolia did not respond to all treatments. No interactive effects were observed between CO 2 and N supply in all species, except for the concentration of total phenolics in oak. Although the amounts of phenolic compounds in beech and oak varied under eCO 2 and high N treatments, the distribution of these compounds did not change. Our results indicate that the changes in the defensive traits of forest tree species under eCO 2 with N loading are related to the successional type.
    Schlagwörter deciduous broad-leaved tree species ; successional species ; carbon–nutrient balance hypothesis ; localization ; plant defense chemicals ; Plant ecology ; QK900-989
    Thema/Rubrik (Code) 580
    Sprache Englisch
    Erscheinungsdatum 2021-07-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
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  3. Artikel ; Online: Plant species richness regulated by geographical variation down-regulates triterpenoid compounds production and antioxidant activities in white birch bark

    Guo, Siru / Wang, Shengfang / Zhao, Shuting / Zhang, Xiting / Ji, Xiaochao / Yun, Cholil / Wu, Shuang / Takayoshi, Koike / Wang, Wenjie / Wang, Huimei

    Flora. 2023 Aug., v. 305 p.152343-

    2023  

    Abstract: White birch (Betula platyphylla Suk.) is a pioneer tree species widely distributed in the high northern hemisphere, and its bioactive compounds have ecological and traditional medicinal roles. How ecological factors impact triterpenoid production is not ... ...

    Abstract White birch (Betula platyphylla Suk.) is a pioneer tree species widely distributed in the high northern hemisphere, and its bioactive compounds have ecological and traditional medicinal roles. How ecological factors impact triterpenoid production is not well understood yet. This study examined the effects of geo-climate, soil properties and plant community properties on triterpenoid compounds synthesis and antioxidant activities of white birch bark at eight locations (13° latitude and 6° longitude ranges) in Northeast China. The results showed that the contents of total triterpenoids, betulin and betulinic acid in white birch bark were high at higher latitudes, and low at lower latitudes. The antioxidant activity of the extracts analyzed by DPPH (1, 1-diphenyl-2-picrylhydrazyl), ABTS (2, 2-azinobis-3-ethylbenzothiazoline-6-sulphonic acid), and FRAP (ferric reducing antioxidant power assay) methods varied across different locations and positively correlated with triterpenoid compound contents. Redundancy analysis indicated that more than 40% of the secondary metabolite variations could be explained by plant species richness in the community, largely regulated by geographical variation. Our findings highlighted that higher species richness reduced triterpenoid accumulation and antioxidant potential. At the same time, the harsh environments in cold and dry geo-climate increased triterpenoid production of white birch. This study favors the efficient use of white birch for triterpenoid production and implies that the stress of harsh environment will promote the synthesis of the secondary metabolite synthesis of dominant trees.
    Schlagwörter Betula ; antioxidant activity ; antioxidants ; bark ; betulin ; betulinic acid ; cold ; flora ; geographical variation ; latitude ; longitude ; pioneer species ; plant communities ; secondary metabolites ; soil ; species richness ; China ; Betula platyphylla ; Bioactive compounds ; Boreal forest ; Geo-climate
    Sprache Englisch
    Erscheinungsverlauf 2023-08
    Erscheinungsort Elsevier GmbH
    Dokumenttyp Artikel ; Online
    ZDB-ID 5580-3
    ISSN 0367-2530 ; 0373-6490
    ISSN 0367-2530 ; 0373-6490
    DOI 10.1016/j.flora.2023.152343
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  4. Artikel: Nitrogen loading increases the ozone sensitivity of larch seedlings with higher sensitivity to nitrogen loading

    Sugai, Tetsuto / Toshihiro Watanabe / Kazuhito Kita / Takayoshi Koike

    Science of the total environment. 2019 May 01, v. 663

    2019  

    Abstract: Larch (Larix sp.) tree is a critical species for the future afforestation in Northeast Asia. The impacts of elevated concentrations of ground-level ozone (O3) and nitrogen (N) deposition are raising concerns. However, knowledge of the combined effects of ...

    Abstract Larch (Larix sp.) tree is a critical species for the future afforestation in Northeast Asia. The impacts of elevated concentrations of ground-level ozone (O3) and nitrogen (N) deposition are raising concerns. However, knowledge of the combined effects of elevated O3 and N loading are still limited. We investigated whether nitrogen loading mitigates the negative impacts of ozone on two larch species: the Japanese larch (L. kaempferi) and its hybrid larch F1 (L. gmelinii var. japonica × L. kaempferi) or not. We used open-top cambers and compared responses of the larch seedlings. Results showed the N loading mitigated the negative effects of O3 on Japanese larch. However, in hybrid larch F1, N loading did not mitigate O3-induced inhibition of growth and photosynthetic capacity. Mitigation effect of N loading on negative O3 impacts may vary between the two Larix spp., Hybrid larch F1 could be more affected by the combined effects of O3 and N loading due to its higher growth response to N loading. Elevated O3 also reduced leaf nitrogen/phosphorus (N/P) ratio by elevated O3, with significant effects in hybrid larch F1, particularly under N loading. In the present study, leaf N/P ratio was utilized to validate the hypothesis that a positive effect of N loading may be observed if O3 does not induce P limitation in Larix spp. We demonstrated a potential leaf N/P ratio function, which could reflect responses to O3 and N loading in hybrid larch F1.
    Schlagwörter Larix gmelinii var. japonica ; Larix kaempferi ; afforestation ; hybrids ; leaves ; nitrogen ; ozone ; phosphorus ; photosynthesis ; pollution load ; seedlings ; trees ; Asia
    Sprache Englisch
    Erscheinungsverlauf 2019-0501
    Umfang p. 587-595.
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2019.01.292
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  5. Artikel ; Online: Does Ozone Alter the Attractiveness of Japanese White Birch Leaves to the Leaf Beetle Agelastica coerulea via Changes in Biogenic Volatile Organic Compounds (BVOCs)

    Noboru Masui / Tomoki Mochizuki / Akira Tani / Hideyuki Matsuura / Evgenios Agathokleous / Toshihiro Watanabe / Takayoshi Koike

    Forests, Vol 11, Iss 1, p

    An Examination with the Y-Tube Test

    2020  Band 58

    Abstract: Elevated ground-level ozone (O 3 ) reduced C-based defense chemicals; however, severe grazing damages were found in leaves grown in the low O 3 condition of a free air O 3 -concentration enrichment (O 3 -FACE) system. To explain this phenomenon, this ... ...

    Abstract Elevated ground-level ozone (O 3 ) reduced C-based defense chemicals; however, severe grazing damages were found in leaves grown in the low O 3 condition of a free air O 3 -concentration enrichment (O 3 -FACE) system. To explain this phenomenon, this study investigates the role of BVOCs (biogenic volatile organic compounds) as signaling compounds for insect herbivores. BVOCs act as scents for herbivore insects to locate host plants, while some BVOCs show high reactivity to O 3 , inducing changes in the composition of BVOCs in atmospheres with elevated O 3 . To assess the aforementioned phenomenon, profiles of BVOCs emitted from birch ( Betula platyphylla var. japonica Hara) leaves were analyzed ex situ, and Y-tube insect preference tests were conducted in vitro to study the insect olfactory response. The assays were conducted in June and August or September, according to the life cycle of the adult alder leaf beetle Agelastica coerulea Baly (Coleoptera: Chrysomelidae). The Y-tube tests revealed that the leaf beetles were attracted to BVOCs, and O 3 per se had neither an attractant nor a repellent effect. BVOCs became less attractant when mixed with highly concentrated O 3 (>80 ppb). About 20% of the total BVOCs emitted were highly O 3 -reactive compounds, such as β -ocimene. The results suggest that BVOCs emitted from the birch leaves can be altered by elevated O 3 , thus potentially reducing the attractiveness of leaves to herbivorous insects searching for food.
    Schlagwörter atmospheric lifetime ; biogenic volatile organic compounds (bvocs) ; herbivorous insects ; leaf beetle ; olfactory response ; ozone ; Plant ecology ; QK900-989
    Sprache Englisch
    Erscheinungsdatum 2020-01-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel: Factors controlling soil microbial respiration during the growing season in a mature larch plantation in Northern Japan

    Qu, Laiye / Satoshi Kitaoka / Takayoshi Koike

    Journal of soils and sediments. 2018 Mar., v. 18, no. 3

    2018  

    Abstract: PURPOSE: Soil microbes contribute significantly to soil respiration (SR) in boreal forests; however, there is limited knowledge on microbial contributions from long field investigations. The objective of this study was to estimate soil microbial ... ...

    Abstract PURPOSE: Soil microbes contribute significantly to soil respiration (SR) in boreal forests; however, there is limited knowledge on microbial contributions from long field investigations. The objective of this study was to estimate soil microbial respiration, as well as its primary controlling factors, for a period of three consecutive years. MATERIALS AND METHODS: A trenching method was used to distinguish soil microbial respiration (R Mᵢc) in a 55-year-old mature Japanese larch (Larix kaempferi) plantation in Northern Japan; the soil in which developed originally from volcanic soils containing pumice. We used a portable CO₂ detection system to measure the soil respiration rate during the growing season. Environmental factors, soil physiochemical characteristics, and soil microbial biomass carbon and nitrogen (MBC and MBN) were analyzed to explain the seasonal variations of SR and R Mᵢc. RESULTS AND DISCUSSION: The results showed that the estimated contribution of soil microbes to SR was 78, 62, and 55% during the three successive years, respectively. Respiration attributable to decomposition of aboveground litter contributed approximately 19% to SR. The major environmental factor that affected R Mᵢc was soil temperature at 5 cm depth, which accounted for more than 70% of the seasonal variation in R Mᵢc observed. There were close relations among MBC, MBN, and soil water content, but the soil water content showed no significant relation with R Mᵢc. CONCLUSIONS: The R Mᵢc to SR varied from 78 to 55% following 3 years of trenching treatments. Our results demonstrated the important role of soil microbes on soil respiration in this larch forest. Soil temperature was the major positive factor that influenced R Mᵢc, while soil water content had no significant effect. Global warming will increase the loss of C into the atmosphere by increasing the R Mᵢc, and could accelerate climate change.
    Schlagwörter Larix kaempferi ; boreal forests ; carbon ; carbon dioxide ; environmental factors ; global warming ; growing season ; microbial biomass ; nitrogen ; pumice ; seasonal variation ; soil microorganisms ; soil respiration ; soil temperature ; soil water ; soil water content ; trenching ; volcanic soils ; Japan
    Sprache Englisch
    Erscheinungsverlauf 2018-03
    Umfang p. 661-668.
    Erscheinungsort Springer Berlin Heidelberg
    Dokumenttyp Artikel
    ZDB-ID 2050898-0
    ISSN 1614-7480 ; 1439-0108
    ISSN (online) 1614-7480
    ISSN 1439-0108
    DOI 10.1007/s11368-017-1799-9
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  7. Artikel ; Online: Age-Dependent Changes in Soil Respiration and Associated Parameters in Siberian Permafrost Larch Stands Affected by Wildfire

    Oxana V. Masyagina / Svetlana Y. Evgrafova / Oleg V. Menyailo / Shigeta Mori / Takayoshi Koike / Stanislav G. Prokushkin

    Forests, Vol 12, Iss 1, p

    2021  Band 107

    Abstract: The observed high spatial variation in soil respiration (SR) and associated parameters emphasized the importance of SR heterogeneity at high latitudes and the involvement of many factors in its regulation, especially within fire-affected areas. The ... ...

    Abstract The observed high spatial variation in soil respiration (SR) and associated parameters emphasized the importance of SR heterogeneity at high latitudes and the involvement of many factors in its regulation, especially within fire-affected areas. The problem of estimating CO 2 emissions during post-fire recovery in high-latitude ecosystems addresses the mutual influence of wildfires and climate change on the C cycle. Despite its importance, especially in permafrost regions because of their vulnerability, the mutual influence of these factors on CO 2 dynamics has rarely been studied. Thus, we aimed to understand the dynamics of soil respiration (SR) in wildfire-affected larch recovery successions. We analyzed 16-year data (1995–2010) on SR and associated soil, biological, and environmental parameters obtained during several field studies in larch stands of different ages (0–276 years) in the Krasnoyarsk region (Russia). We observed a high variation in SR and related parameters among the study sites. SR varied from 1.77 ± 1.18 (mean ± SD) µmol CO 2 m −2 s −1 in the 0–10-year-old group to 5.18 ± 2.70 µmol CO 2 m −2 s −1 in the 150–276-year-old group. We found a significant increasing trend in SR in the 88–141-year old group during the study period, which was related to the significant decrease in soil water content due to the shortage of precipitation during the growing season. We observed a high spatial variation in SR, which was primarily regulated by biological and environmental factors. Different parameters were the main contributors to SR in each group, an SR was significantly affected by the inter-relationships between the studied parameters. The obtained results can be incorporated into the existing SR databases, which can allow their use in the construction and validation of C transport models as well as in monitoring global fluctuations in the C cycle in response to climate change.
    Schlagwörter carbon ; greenhouse gases ; Larix ; boreal forests ; Tura ; soil heterotrophic respiration ; Plant ecology ; QK900-989
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  8. Artikel ; Online: Salt Stress Reduced the Seedling Growth of Two Larch Species Under Elevated Ozone

    Tetsuto Sugai / Wang Yannan / Toshihiro Watanabe / Fuyuki Satoh / Laiye Qu / Takayoshi Koike

    Frontiers in Forests and Global Change, Vol

    2019  Band 2

    Abstract: The effect of elevated ozone (eO3) and soil salinization with alkaline salts in northeastern (NE) China is a serious concern affecting the success of the national replanting project. As planted areas exceed 4 million hectares in China, we must consider ... ...

    Abstract The effect of elevated ozone (eO3) and soil salinization with alkaline salts in northeastern (NE) China is a serious concern affecting the success of the national replanting project. As planted areas exceed 4 million hectares in China, we must consider future afforestation efforts after thinning and harvesting. Here, we investigated eO3 and salt stress on Dahurian larch (Larix gmelinii var. japonica; DL) and Japanese larch (L. kaempferi; JL) seedlings. The seedlings were exposed to eO3 (~70 nmol mol−1) and ambient ozone (aO3) (~25~40 nmol mol−1) for one growing season in an open top chamber (OTC) system with simulated salinity in NE China (alkaline salt, NaHCO3:NaCl = 9:1, 20mM Na+). The seedlings under salt-free treatment received tap water. Although the effects of eO3 on DL were not significant, eO3 significantly increased total dry mass and total leaf area index of JL. There was no significant reduction in total dry mass under salt stress in both species. The relationship between needle Na and other mineral contents indicated that both species maintained K contents even with excess Na contents in needles. DL showed relatively lower reduction of other mineral contents, indicating higher salt tolerance of needle element homeostasis than JL. Contrary to our hypothesis, there were no interaction effects of eO3 and salt stress on both species. These results indicated that DL seedlings may be more suitable than JL seedlings as a future afforestation species under eO3 levels of <70 nmol mol−1 at saline soil condition.
    Schlagwörter combined effect ; salt stress ; larch ; interspecific differences ; homeostasis ; Forestry ; SD1-669.5 ; Environmental sciences ; GE1-350
    Thema/Rubrik (Code) 580
    Sprache Englisch
    Erscheinungsdatum 2019-09-01T00:00:00Z
    Verlag Frontiers Media S.A.
    Dokumenttyp Artikel ; Online
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  9. Artikel: Stem and crown growth of Japanese larch and its hybrid F1 grown in two soils and exposed to two free-air O3 regimes

    Agathokleous, Eugenios / Amelie Vanderstock / Kazuhito Kita / Takayoshi Koike

    Environmental science and pollution research international. 2017 Mar., v. 24, no. 7

    2017  

    Abstract: Ozone (O₃) pollution and soil infertility may negatively affect boreal forests across the Northern Hemisphere. Impacts to economically and ecologically important larches (Larix sp., Pinacaeae) are particularly concerning. Using a free air O₃ ... ...

    Abstract Ozone (O₃) pollution and soil infertility may negatively affect boreal forests across the Northern Hemisphere. Impacts to economically and ecologically important larches (Larix sp., Pinacaeae) are particularly concerning. Using a free air O₃ enrichment (FACE) system, we investigated the effect of 2-year elevated O₃ exposure (≈66 nmol mol⁻¹) on Japanese larch (L. kaempferi) and its hybrid larch F₁ (L. gmelinii var. japonica × L. kaempferi) planted directly into either fertile brown forest soil (BF) or BF mixed with infertile volcanic ash soil (VA). Overall, photosynthetic pigmentation and the growth performance of the stem and crown were reduced in both taxa exposed to elevated O₃. Furthermore, hybrid larch, in both O₃ treatments, performed better than Japanese larch. This finding contradicts findings of prior experiments with potential experimental artifacts of O₃ exposure facilities and root restrictions. Elevated O₃ also disproportionately inhibited stem diameter growth and caused an imbalance in chlorophylls a/b and chlorophyll/carotenoid ratios. Hybrid and Japanese larches grown in BF and VA had a significantly lower drop of stem diameter over the run of stem height (from base to top) when exposed to elevated O₃, compared to ambient O₃. This finding indicates altered stem shape under elevated O₃. Among 11 response variables, there were no significant interactions between O₃ treatment and taxa. There was also no significant interaction of soil condition and taxa, suggesting that the two larches shared a similar response to O₃ and soil type. Understanding the performance of hybrid larch in relation to its parent species has ramifications for breeding success in a soil-degraded and O₃-polluted environment.
    Schlagwörter air ; boreal forests ; brown forest soils ; carotenoids ; chlorophyll ; free air carbon dioxide enrichment ; growth performance ; hybrids ; Larix kaempferi ; ozone ; photosynthesis ; pigmentation ; planting ; pollution ; reproductive success ; soil quality ; volcanic ash soils
    Sprache Englisch
    Erscheinungsverlauf 2017-03
    Umfang p. 6634-6647.
    Erscheinungsort Springer Berlin Heidelberg
    Dokumenttyp Artikel
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-017-8401-2
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  10. Artikel: Leaf stoichiometry of deciduous tree species in different soils exposed to free-air O3 enrichment over two growing seasons

    Shi, Cong / Takayoshi Koike / Toshihiro Watanabe

    Environmental and experimental botany. 2017 June, v. 138

    2017  

    Abstract: The effects of elevated O3 in different soil conditions on foliar elements stoichiometry were investigated in 3 native tree species with a free-air enrichment system in northern Japan over two growing seasons. Essential elements (Mg, K, Ca, Mn, Fe, Ni, P, ...

    Abstract The effects of elevated O3 in different soil conditions on foliar elements stoichiometry were investigated in 3 native tree species with a free-air enrichment system in northern Japan over two growing seasons. Essential elements (Mg, K, Ca, Mn, Fe, Ni, P, N) and two non-essential elements (Cr, Al) were analyzed in leaf samples obtained from 6 different treatments of O3 and soils at 5 collection times from 2014 to 2015. In this study, relationships among the foliar elements within each species were investigated and negative correlations between foliar N and the metal elements were observed in birch (Betula platyphylla var. japonica). From the differences of foliar contents as well as their retranslocation rate, beech (Fagus crenata) with determinate shoot growth pattern were rather more sensitive to O3 stress on foliar contents, meanwhile oak (Quercus mongolica var. crispula) was possibly susceptible to O3 on dynamics of immobile elements. Soil nutrients have distinct impacts on retranslocation rate of K, Fe, and P. Principal component analysis revealed that Mn and K can become indices in assessing the O3 and soil effects in both short and long term monitoring of the growth of these tree species. Our findings are essential in further comprehension to nutrient conservation mechanism in the nutrient dynamics of cool-temperate forests.
    Schlagwörter aluminum ; Betula pendula subsp. mandshurica ; calcium ; chromium ; Fagus crenata ; forests ; growing season ; iron ; leaves ; magnesium ; manganese ; monitoring ; nickel ; ozone ; potassium ; principal component analysis ; Quercus mongolica ; soil ; soil nutrients ; stoichiometry ; trees ; Japan
    Sprache Englisch
    Erscheinungsverlauf 2017-06
    Umfang p. 148-163.
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    ZDB-ID 195968-2
    ISSN 0098-8472
    ISSN 0098-8472
    DOI 10.1016/j.envexpbot.2017.03.012
    Datenquelle NAL Katalog (AGRICOLA)

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