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[PMID]: 29360853
[Au] Autor:Yuan X; Si Y; Lin W; Yang J; Wang Z; Zhang Q; Qian W; Chen Y; Yang Y
[Ad] Address:Key Laboratory for Subtropical Mountain Ecology, School of Geographical Science, Fujian Normal University, Fuzhou, China.
[Ti] Title:Effects of short-term warming and nitrogen addition on the quantity and quality of dissolved organic matter in a subtropical Cunninghamia lanceolata plantation.
[So] Source:PLoS One;13(1):e0191403, 2018.
[Is] ISSN:1932-6203
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Increasing temperature and nitrogen (N) deposition are two large-scale changes projected to occur over the coming decades. The effects of these changes on dissolved organic matter (DOM) are largely unknown. This study aimed to assess the effects of warming and N addition on the quantity and quality of DOM from a subtropical Cunninghamia lanceolata plantation. Between 2014 and 2016, soil solutions were collected from 0-15, 15-30, and 30-60 cm depths by using a negative pressure sampling method. The quantity and quality of DOM were measured under six different treatments. The spectra showed that the DOM of the forest soil solution mainly consisted of aromatic protein-like components, microbial degradation products, and negligible amounts of humic-like substances. Warming, N addition, and warming + N addition significantly inhibited the concentration of dissolved organic carbon (DOC) in the surface (0-15 cm) soil solution. Our results suggested that warming reduced the amount of DOM originating from microbes. The decrease in protein and carboxylic acid contents was mostly attributed to the reduction of DOC following N addition. The warming + N addition treatment showed an interactive effect rather than an additive effect. Thus, short-term warming and warming + N addition decreased the quantity of DOM and facilitated the migration of nutrients to deeper soils. Further, N addition increased the complexity of the DOM structure. Hence, the loss of soil nutrients and the rational application of N need to be considered in order to prevent the accumulation of N compounds in soil.
[Mh] MeSH terms primary: Cunninghamia/metabolism
Nitrogen/metabolism
[Mh] MeSH terms secundary: Carbon Cycle
China
Cunninghamia/drug effects
Ecosystem
Global Warming
Imaging, Three-Dimensional
Models, Biological
Nitrogen/administration & dosage
Nitrogen/analysis
Nitrogen Cycle
Organic Chemicals/metabolism
Soil/chemistry
Solubility
Spectrometry, Fluorescence
Temperature
Tropical Climate
[Pt] Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Name of substance:0 (Organic Chemicals); 0 (Soil); N762921K75 (Nitrogen)
[Em] Entry month:1802
[Cu] Class update date: 180227
[Lr] Last revision date:180227
[Js] Journal subset:IM
[Da] Date of entry for processing:180124
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191403

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[PMID]: 29339267
[Au] Autor:Xu G; Liu Y; Long Z; Hu S; Zhang Y; Jiang H
[Ad] Address:School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang 621010, China. Electronic address: xugang@swust.edu.cn.
[Ti] Title:Effects of exotic plantation forests on soil edaphon and organic matter fractions.
[So] Source:Sci Total Environ;626:59-68, 2018 Jan 13.
[Is] ISSN:1879-1026
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:There is uncertainty and limited knowledge regarding soil microbial properties and organic matter fractions of natural secondary forest accompanying chemical environmental changes of replacement by pure alien plantation forests in a hilly area of southwest of Sichuan province China. The aim of this study was to evaluate the impact of natural secondary forest (NSF) to pure Cryptomeria fortunei forest (CFF) and Cunninghamia lanceolata forest (CLF) on soil organic fractions and microbial communities. The results showed that the soil total phospholipid fatty acids (PLFAs), total bacteria and fungi, microbial carbon pool, organic recalcitrant carbon (C) and (N) fractions, soil microbial quotient and labile and recalcitrant C use efficiencies in each pure plantation were significantly decreased, but their microbial N pool, labile C and N pools, soil carbon dioxide efflux, soil respiratory quotient and recalcitrant N use efficiency were increased. An RDA analysis revealed that soil total PLFAs, total bacteria and fungi and total Gram-positive and Gram-negative bacteria were significantly associated with exchangeable Al , exchangeable acid, Al , available P and Mg and pH, which resulted into microbial functional changes of soil labile and recalcitrant substrate use efficiencies. Modified microbial C- and N-use efficiency due to forest conversion ultimately meets those of rapidly growing trees in plantation forests. Enlarged soil labile fractions and soil respiratory quotients in plantation forests would be a potential positive effect for C source in the future forest management. Altogether, pure plantation practices could provoke regulatory networks and functions of soil microbes and enzyme activities, consequently leading to differentiated utilization of soil organic matter fractions accompanying the change in environmental factors.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1801
[Cu] Class update date: 180117
[Lr] Last revision date:180117
[St] Status:Publisher

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[PMID]: 29073278
[Au] Autor:Fang XM; Zhang XL; Zong YY; Zhang Y; Wan SZ; Bu WS; Chen FS
[Ad] Address:Jiangxi Provincial Key Laboratory of Silviculture, College of Forestry, Jiangxi Agricultural University, Nanchang, China.
[Ti] Title:Soil phosphorus functional fractions and tree tissue nutrient concentrations influenced by stand density in subtropical Chinese fir plantation forests.
[So] Source:PLoS One;12(10):e0186905, 2017.
[Is] ISSN:1932-6203
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Stand density regulation is an important measure of plantation forest management, and phosphorus (P) is often the limiting factor of tree productivity, especially in the subtropics and tropics. However, the stand density influence on ecosystem P cycling is unclear in Chinese fir (Cunninghamia lanceolata) plantations of subtropical China. We collected rhizosphere and bulk soils, leaves and twigs with different ages and roots with different orders to measure P and nitrogen (N) variables in Chinese fir plantations with low density (LDCF) and high density (HDCF) at Fujian and Hunan provinces of subtropical China. Rhizosphere soil labile P, slow P, occluded P and extractable P were higher in LDCF than HDCF at two sites. Meanwhile, P and N concentrations of 1-year-old leaves and twigs were higher in LDCF than HDCF and leaf N/P ratio generally increased with increasing leaf age at two sites. Rhizosphere vs. bulk soil labile P and occluded P were greater in LDCF than HDCF at Fujian. Nitrogen resorption efficiencies (NRE) of leaves and twigs were higher in LDCF than HDCF at Fujian, while their P resorption efficiencies (PRE) were not different between two densities at two sites. The average NRE of leaves (41.7%) and twigs (65.6%) were lower than the corresponding PRE (67.8% and 78.0%, respectively). Our results suggest that reducing stem density in Chinese fir plantations might be helpful to increase soil active P supplies and meet tree nutrient requirements.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171110
[Lr] Last revision date:171110
[St] Status:In-Process
[do] DOI:10.1371/journal.pone.0186905

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[PMID]: 29062029
[Au] Autor:Duan H; Cao S; Zheng H; Hu D; Lin J; Cui B; Lin H; Hu R; Wu B; Sun Y; Li Y
[Ad] Address:Beijing Advanced Innovation Center for Tree Breeding by Molecular Design. National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry Universit
[Ti] Title:Genetic Characterization of Chinese fir from Six Provinces in Southern China and Construction of a Core Collection.
[So] Source:Sci Rep;7(1):13814, 2017 Oct 23.
[Is] ISSN:2045-2322
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:Large ex situ germplasm collections of plants generally contain significant diversity. A set of 700 well-conserved Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) clones from six provinces in southern China in the ex situ gene bank of Longshan State Forest, was analyzed using 21 simple sequence repeat markers, with the aim of assessing the genetic diversity of these germplasm resources. Genetic analysis revealed extensive genetic variation among the accessions, with an average of 8.31 alleles per locus and a mean Shannon index of 1.331. Excluding loci with null alleles, we obtained a low level of genetic differentiation among provinces, consistent with the interpopulation genetic variation (1%). Three clusters were identified by STRUCTURE, which did not match the individuals' geographical provenances. Ten traits related to growth and wood properties were quantified in these individuals, and there was substantial variation in all traits across individuals, these provide a potential source of variation for genetic improvement of the Chinese fir. Screening large collections for multiple-trait selective breeding programs is laborious and expensive; a core collection of 300 accessions, representative of the germplasm, was established, based on genotypic and phenotypic data. The identified small, but diverse, collections will be useful for further genome-wide association studies.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171118
[Lr] Last revision date:171118
[St] Status:In-Data-Review
[do] DOI:10.1038/s41598-017-13219-0

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[PMID]: 28989826
[Au] Autor:Wang SS; Zhang Y; Liu DC; Sun XW; Wang R; Li YY
[Ad] Address:School of Ecological and Environmental Sciences, Tiantong National Station of Forest Ecosystem, Shanghai Key Laboratory for Urban Ecology and Restoration, East China Normal University, Shanghai 200241, People's Republic of China.
[Ti] Title:Isolation and characterization of 30 microsatellite loci for (Taxodiaceae).
[So] Source:Appl Plant Sci;5(9), 2017 Sep.
[Is] ISSN:2168-0450
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:PREMISE OF THE STUDY: To quantify the population-level genetic characteristics of (Taxodiaceae), an important timber conifer, we developed 30 pairs of microsatellite primers based on the nuclear genome. METHODS AND RESULTS: Using the streptavidin-biotin capture system, we developed 14 polymorphic and 16 monomorphic microsatellites. Polymorphisms were detected in 14 loci using 94 individual trees that were collected from three populations in Hubei and Zhejiang provinces and in Chongqing Municipality, China. There were three to 30 alleles per locus, and the observed and expected heterozygosities ranged from 0.0313-0.8333 and from 0.0313-0.9246, respectively. Cross-species amplification showed that two to seven polymorphic loci were functional in three of the five related species that were collected. CONCLUSIONS: Our newly developed microsatellite primers provide neutral molecular markers that are beneficial to future studies of population genetics and germplasm conservation of .
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171013
[Lr] Last revision date:171013
[St] Status:PubMed-not-MEDLINE

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[PMID]: 28698639
[Au] Autor:Li S; Huang P; Ding G; Zhou L; Tang P; Sun M; Zheng Y; Lin S
[Ad] Address:Forestry College, Fujian Agriculture and Forestry University, Fuzhou, 350002, P. R. China.
[Ti] Title:Optimization of hormone combinations for root growth and bud germination in Chinese fir (Cunninghamia lanceolata) clone leaf cuttings.
[So] Source:Sci Rep;7(1):5046, 2017 Jul 11.
[Is] ISSN:2045-2322
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:In order to ascertain the optimal hormone combination for Chinese fir (Cunninghamia lanceolata) leaf cuttings, an L (4) orthogonal test of 6-benzylaminopurine (6-BA), 1-naphthaleneacetic acid (NAA), and indole-3-butyric acid (IBA) (0, 10, 30, or 50 mg · L of each exogenous hormone) immersion for 5, 10, 15, or 20 min was conducted. Callus initiation rate and rooting promotion rate were mainly affected by treatment time, root length increase by 6-BA concentration, and bud germination rate and plantlet formation rate by NAA concentration. The expected optimal combination for callus initiation rate was 50 mg · L 6-BA + 0 mg · L NAA + 30 mg · L IBA + 10 min; for rooting promotion rate, it was 0-10 mg · L 6-BA + 10 mg · L NAA + 30 mg · L IBA + 20 min; for bud germination rate, it was 50 mg · L 6-BA + 0-10 mg · L NAA + 0-30 mg · L IBA + 20 min; and for seedling formation rate for No. 4, it was 10 mg · L 6-BA + 10 mg · L NAA + 0 mg · L IBA + 20 min. Light microscopy image analysis revealed that a cluster of primordial cells was produced 40 days after cutting, and mastoid cells developed into peninsula cells in calli that were cultured for 50 days.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1707
[Cu] Class update date: 170716
[Lr] Last revision date:170716
[St] Status:In-Data-Review
[do] DOI:10.1038/s41598-017-05295-z

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[PMID]: 28406956
[Au] Autor:Chen Y; Peng Z; Wu C; Ma Z; Ding G; Cao G; Ruan S; Lin S
[Ad] Address:College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China.
[Ti] Title:Genetic diversity and variation of Chinese fir from Fujian province and Taiwan, China, based on ISSR markers.
[So] Source:PLoS One;12(4):e0175571, 2017.
[Is] ISSN:1932-6203
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Genetic diversity and variation among 11 populations of Chinese fir from Fujian province and Taiwan were assessed using inter-simple sequence repeat (ISSR) markers to reveal the evolutionary relationship in their distribution range in this report. Analysis of genetic parameters of the different populations showed that populations in Fujian province exhibited a greater level of genetic diversity than did the populations in Taiwan. Compared to Taiwan populations, significant limited gene flow were observed among Fujian populations. An UPGMA cluster analysis showed that the most individuals of Taiwan populations formed a single cluster, whereas 6 discrete clusters were formed by each population from Fujian. All populations were divided into 3 main groups and that all 5 populations from Taiwan were gathered into a subgroup combined with 2 populations, Dehua and Liancheng, formed one of the 3 main groups, which indicated relative stronger relatedness. It is supported by a genetic structure analysis. All those results are suggesting different levels of genetic diversity and variation of Chinese fir between Fujian and Taiwan, and indicating different patterns of evolutionary process and local environmental adaption.
[Mh] MeSH terms primary: Cunninghamia/genetics
DNA, Plant/genetics
Microsatellite Repeats
[Mh] MeSH terms secundary: China
Cluster Analysis
Evolution, Molecular
Gene Flow
Genetic Variation
Taiwan
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (DNA, Plant)
[Em] Entry month:1704
[Cu] Class update date: 170504
[Lr] Last revision date:170504
[Js] Journal subset:IM
[Da] Date of entry for processing:170414
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0175571

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[PMID]: 28290087
[Au] Autor:Cui J; Wang Z; Zhang X; Mulder J; Zhang M
[Ad] Address:Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
[Ti] Title:Temporal variability of ammonia emission potentials for six plant species in an evergreen subtropical forest in southwest China.
[So] Source:Environ Sci Pollut Res Int;24(11):10808-10818, 2017 Apr.
[Is] ISSN:1614-7499
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:The temporal variability of leaf ammonia (NH ) emission potentials (the ratio of leaf tissue ammonium to proton concentration) and nitrogen (N) pools of six dominant plant species were investigated at the Tieshanping (TSP) forested catchment, southwest China. The results showed that the NH emission potentials and N pools presented small variations among seasons, which were mainly controlled by plant species and the leaf age. Also, high emission potential in one species did not correspond to high tissue N content. Specifically, the Chinese fir (Cunninghamia lanceolata) had higher NH emission potential (mean: 46.2) but lower N content (mean: 1.6% of Dw). The leaf privet (Ligustrum quihoui Carr.) was with the moderate emission potential (15) and the highest N content (2.7% of Dw) on average, which for the Masson pine (Pinus massoniana) were both low. Overall, the emission potentials of the six species were too low (<200) to build up a sufficiently high NH partial pressure in the leaves. Therefore, the Masson pine dominant subtropical forest at TSP acts as a sink for the atmospheric NH , indicating that using the N flux in throughfall only may significantly underestimate the N income of the ecosystem. The results are informative for future modeling of plant-atmosphere NH exchange and estimating N budget in local or regional scales.
[Mh] MeSH terms primary: Ammonia
Soil
[Mh] MeSH terms secundary: China
Ecosystem
Forests
Nitrogen
Plant Leaves/chemistry
Trees
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Soil); 7664-41-7 (Ammonia); N762921K75 (Nitrogen)
[Em] Entry month:1706
[Cu] Class update date: 171116
[Lr] Last revision date:171116
[Js] Journal subset:IM
[Da] Date of entry for processing:170315
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-017-8650-0

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[PMID]: 28249750
[Au] Autor:Chen LC; Wang H; Yu X; Zhang WD; Lü XT; Wang SL
[Ad] Address:Huitong Experimental Station of Forest Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; Huitong National Research Station of Forest Ecosystem, Huitong 418307, China. Electronic address: lcchen@iae.ac.cn.
[Ti] Title:Recovery time of soil carbon pools of conversional Chinese fir plantations from broadleaved forests in subtropical regions, China.
[So] Source:Sci Total Environ;587-588:296-304, 2017 Jun 01.
[Is] ISSN:1879-1026
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:The conversion from natural forest to plantation has been widely applied, with consequences on ecosystem carbon pool. The experimental results of changes of soil carbon stocks after forest conversion are often contradictory. Moreover, the recovery time of soil carbon stocks after forest conversion varies among different sites. To examine the changes of soil carbon stocks following the forest conversions in the long-term and to estimate the recovery time, we selected 116 subtropical forests, including 29 pair-wise replicates for evergreen broadleaved forests (EBF, 40-100-year-old), young Chinese fir plantations (Cunninghamia lanceolata) (YCP, 4-8-year-old), middle-aged Chinese fir plantations (MACP, 13-20-year-old), and mature Chinese fir plantations (MCP, 23-32-year-old), and estimated soil carbon stocks. Soil carbon stocks of YCP and MACP decreased in average 12.5 and 28.7Mgha compared with EBF, and showed no variation between MCP and EBF. Soil carbon stocks were positively correlated to soil total nitrogen stocks and C:N ratio. Our results showed that the forest conversions didn't cause a variation of soil carbon stocks in the long-term, although there was a short-term decline after conversion. The recovery time of soil carbon stock is 27years. These results indicate that the conversion from evergreen broadleaved forests to Chinese fir plantations in subtropical region of China causes soil carbon release in early stage, but has no effect on soil carbon stocks in the long-term. Prolonging the rotation period (>27years) would offset the adverse effects of the forest conversion on soil carbon stocks, and be critical in alleviating global climate change.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1703
[Cu] Class update date: 170322
[Lr] Last revision date:170322
[St] Status:In-Data-Review

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[PMID]: 28246394
[Au] Autor:Hu R; Sun Y; Wu B; Duan H; Zheng H; Hu D; Lin H; Tong Z; Xu J; Li Y
[Ad] Address:National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China.
[Ti] Title:Somatic Embryogenesis of Immature Cunninghamia lanceolata (Lamb.) Hook Zygotic Embryos.
[So] Source:Sci Rep;7(1):56, 2017 03 03.
[Is] ISSN:2045-2322
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:Two efficient somatic embryogenesis systems were developed in Chinese fir, the most important conifer for industrial wood production in China. Three development stages (cleavage polyembryony, dominant embryo, and precotyledon) of immature embryos derived from 25 genotypes of open-pollinated mother trees were used as initial explants. Cleavage polyembryony-stage embryos with a 12.44% induction rate was the most embryogenic response stage. The highest frequency of embryogenic callus (13.86%) induction was obtained from DCR medium supplemented with 1.5 mg L 2,4-dichlorophenoxyacetic acid (2,4-D) and 0.3 mg L kinetin (KN). An average of 53.33 early somatic embryos were produced from approximately 0.2 g (fresh weight) embryogenic callus after 2 weeks of incubation on medium supplemented with 50 µmol L abscisic acid (ABA) and 100 g L polyethylene glycol (PEG) 6000. About 53% dominant embryos have an embryogenic response after a 6-week cultivation on medium supplemented with 1.0-2.0 mg L benzyladenine (BA), 0.2 mg L naphthylacetic acid (NAA) or 2,4-D, and 0.004 mg L thidiazuron (TDZ). After three successive transfer cultures on medium supplemented with 1.5 mg L BA, 0.2 mg L NAA, and 0.004 mg L TDZ, 4.49-16.51% of the embryos developed into somatic embryos.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1703
[Cu] Class update date: 170703
[Lr] Last revision date:170703
[St] Status:In-Data-Review
[do] DOI:10.1038/s41598-017-00156-1


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