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| 1 | Spatial pattern of soil organic carbon in desert grasslands of the diluvial-alluvial plains of northern Qilian Mountains显示文摘The soil properties in arid ecosystems are important determinants of vegetation distribution patterns.Soil organic carbon(SOC)content,which is closely related to soil types and the holding capacities of soil water and nutrients,exhibits complex variability in arid desert grasslands;thus,it is essentially an impact factor for the distribution pattern of desert grasslands.In the present study,an investigation was conducted to estimate the spatial pattern of SOC content in desert grasslands and the association with environmental factors in the diluvial-alluvial plains of northern Qilian Mountains.The results showed that the mean values of SOC ranged from 2.76 to 5.80 g/kg in the soil profiles,and decreased with soil depths.The coefficients of variation(CV)of the SOC were high(ranging from 48.83%to 94.67%),which indicated a strong spatial variability.SOC in the desert grasslands of the study region presented a regular spatial distribution,which increased gradually from the northwest to the southeast.The SOC distribution had a pattern linked to elevation,which may be related to the gradient of climate conditions.Soil type and plant community significantly affected the SOC.The SOC had a significant positive relationship with soil moisture(P<0.05);whereas,it had a more significant negative relationship with the soil bulk density(BD)(P<0.01).However,a number of the variations in the SOC could be explained not by the environmental factors involved in this analysis,but rather other factors(such as grazing activity and landscape).The results provide important references for soil carbon storage estimation in this study region.In addition,the SOC association with environmental variables also provides a basis for a sustainable use of the limited grassland resources in the diluvial-alluvial plains of northern Qilian Mountains. | Rong YANG YongZhong SU Min WANG Tao WANG Xiao YANG GuiPing FAN TianChang WU | 2014 | Journal of Arid Land2014，6，2： | 11 |
| 2 | Cenozoic magmatic activity and oblique uplifting of the Ailao Mountain: Evidence from a short-period dense seismic array显示文摘Geological studies show that the southern part of Ailaoshan-Red River shear zone(ALSRRSZ)has experienced complex metallogenic processes and multi-stage non-uniform uplifting,called oblique uplifting since the Cenozoic.To detect the deep structure and geodynamic background beneath Daping,Chang’an and other gold and polymetallic deposits in this area,we carried out a high-density short-period seismic array survey in southern Yunnan province.The array used is approximately240 km long with an interval of 500 m between two adjacent stations.Based on the data collected by the array,we used H-κstacking and common conversion point(CCP)methods of receiver functions to reveal the fine crustal structure beneath this array,which was located from Lvchun(western end)to the east and ended in Maguan.The three main conclusions are as follows.(1)The average crustal thickness is approximately 37 km and the Vp/Vsratio is 1.75.However,the thickness and Vp/Vsratio of the Ailao Mountain are rather greater or higher than those of the western Lanping-Simao Basin and eastern South-China block.These results may indicate that the crust is rich in ferromagnesian minerals or has a thermal fluid anomaly after orogenic movement.(2)There are two obvious inclined interfaces beneath the Ailao Mountain in the mid-upper crust,which suggests that strong deformation occurred there during the orogenic period.Some evidences,such as the weak converted-wave Pms phase from the Moho,low P-wave velocities of the upper mantle,high surface heat flow values,and generally developed hot springs,indicate that a strong crust-mantle interaction exists in the southern segments of the Ailaoshan-Red River shear zone.These interactions include a diapir of mantle-sourced magma(stronger in the east than that in the west),lateral collision from the Indian Plate,and the differential uplift caused by the strike-slip movement of the Red River Fault.All of above deep processes led to the Cenozoic oblique uplifting of Ailao Mountain.(3)By combining the location of the deposits on the surface,characteristics of the average crustal Vp/Vsratio,hypocenters of the small earthquakes along the research profile,Moho shape,and horizontal variations of the Pms phase amplitudes,we speculate that the Ailaoshan Fault was the upgoing conduit for metallogenic magma and played a significant role in the Cenozoic development of the multiform metal deposits around the Ailao Mountain area. | Lu ZHANG Zhiming BAI Tao XU Zhenbo WU Minfu HUANG Guiping YU Junlei CHEN Mengjie ZHENG | 2020 | Science China Earth Sciences2020，63，9： | 1 |
| 3 | Mutations in the miRNA165/166 binding site of the HB2 gene result in pleiotropic effects on morphological traits in wheat显示文摘Leaf,spike,stem,and root morphologies are key factors that determine crop growth,development,and productivity.Multiple genes that control these morphological traits have been identified in Arabidopsis,rice,maize,and other plant species.However,little is known about the genomic regions and genes associated with morphological traits in wheat.Here,we identified the ethyl methanesulfonate-derived mutant wheat line M133 that displays multiple morphological changes that include upward-curled leaves,paired spikelets,dwarfism,and delayed heading.Using bulked segregant RNA sequencing(BSR-seq)and a high-resolution genetic map,we identified TraesCS1D02G155200(HBD2)as a potential candidate gene.HB-D2 encodes a class III homeodomain-leucine zipper(HD-ZIP III)transcription factor,and the mutation was located in the miRNA165/166 complementary site,resulting in a resistant allele designated rHb-D2.The relative expression of rHb2 in the mutant plants was significantly higher(P<0.01)than in plants homozygous for the WT allele.Independent resistant mutations that disrupt the miRNA165/166 complementary sites in the A-(rHb-A2)and B-genome(rHb-B2)homoeologs showed similar phenotypic alterations,but the relative intensity of the effects was different.Transgenic plants expressing rHb-D2 gene driven by the maize UBIQUITIN(UBI)promoter showed similar phenotypes to the rHb-D2 mutant.These results confirmed that HB-D2 is the causal gene responsible for the mutant phenotypes.Finally,a survey of 1397 wheat accessions showed that the complementary sites for miRNA165/166 in all three HB2 homoeologs are highly conserved.Our results suggest that HB2 plays an important role in regulating growth and development in wheat. | Dengji Jiang Lei Hua Chaozhong Zhang Hongna Li Zheng Wang Jian Li Guiping Wang Rui Song Tao Shen Hongyu Li Shengsheng Bai Yanna Liu Jian Wang Hao Li Jorge Dubcovsky Shisheng Chen | 2023 | The Crop Journal2023，11，1： | 1 |
| 4 | Micro nearinfrared spectroscopy(Micro NIRS)base on on-line enrichment :Determination of trace copper in water using glycidyl methacrylatebasedmonolithic material显示文摘 | Chen Guiping Wei Yuan Mei Tao Mei | 2010 | Analytica Chimica Acta2010，670，： | 1 |
| 5 | Ray tracing of turning wave in elliptically anisotropic media with an irregular surface显示文摘Seismic ray tracing in anisotropic media with irregular surface is crucial for the exploration of the fine crustal structure. Elliptically anisotropic medium is the type of anisotropic media with only four independent elastic parameters. Usually, this medium can be described by only the vertical phase velocity and the horizontal phase velocity for seismic wave propagation. Model parameterization in this study is described by flexible triangular grids,which is beneficial for the description of irregular surface with high degree of approximation. Both the vertical and horizontal phase velocities are defined in the triangular grids, respectively, which are used for the description of phase velocity distribution everywhere in the model by linear interpolation. We develop a shooting ray tracing method of turning wave in the elliptically anisotropic media with irregular surface. Runge-Kutta method is applied to solve the partial differential equation of seismic ray in elliptically anisotropic media. Linearly modified method is used for adjusting emergent phase angles in the shooting scheme. Numerical tests demonstrate that ray paths coincide well with analytical trajectories in transversely homogeneous elliptically anisotropic media. Seismic ray tracing results in transversely inhomogeneous elliptically anisotropic media demonstrate that our method is effective for further first-arrival tomography in elliptically anisotropic media with an irregular surface. | Minghui Zhang Tao Xu Zhiming Bai Youshan Liu Jue Hou Guiping Yu | 2017 | Earthquake Science2017，30，5： | 1 |
| 6 | Effects of Shengmai Yin(生脉饮)on pulmonary and cardiac function in coronavirus disease 2019 convalescent patients with cardiopulmonary symptoms:a randomized,double blind,multicenter control trial显示文摘OBJECTIVE:To evaluate the efficacy and safety of Shengmai Yin(生脉饮,SMY)on visual analogue scale(VAS)for cardiopulmonary symptoms in coronavirus disease 2019(COVID-19)convalescent patients.METHODS:In this randomized,double blind and multicenter controlled trial,a total of 200 COVID-19 convalescent patients who with cardiopulmonary symptoms were enrolled from three medical centers in Hubei,China.These patients were randomized divided into trial group and the control group,100 patients in each one,SMY and its placebo were applied to respectively,for two weeks.VAS of clinical symptoms included shortness of breath,hidrosis,chest distress,palpitation,and dry cough was performed at 0,1,2 weeks.Decrease in VAS of 30%or more was defined as effective,and a reduction in VAS of 0 was defined as curative.RESULTS:A total of 192 completed the study.The VAS of TCM symptoms showed there was no difference in baseline between the two groups.The VAS in both groups was down-regulated,and there was no significant difference in VAS and cure rates at the first and second week between the two groups.There was no significant difference in breath,hidrosis,palpitation,and dry cough between the two groups but SMY treatment for two weeks has remarkable therapeutic effects in chest distress than placebo.CONCLUSIONS:SMY could effectively ameliorate the symptoms of chest distress,and improve the quality of life of the COVID-19 convalescent patients. | AN Xuedong MAO Lina XIA Ping SU Wen WANG Beibei KOU Leiya ZHANG Zequan QI Meng HU Song CHEN Jing LI Xiujuan LIU Jinwei ZHOU Juan QIAO Jie LUO Dan LUO Guangwei YAN Youqin YANG Guiping DONG Dandan ZHOU Wei TAO Junxiu JIN De TONG Xiaolin WEI Li | 2023 | Journal of Traditional Chinese Medicine2023，43，1： | 1 |
| 7 | Composite quantile regression estimation for P-GARCH processes显示文摘We consider the periodic generalized autoregressive conditional heteroskedasticity(P-GARCH) process and propose a robust estimator by composite quantile regression. We study some useful properties about the P-GARCH model. Under some mild conditions, we establish the asymptotic results of proposed estimator.The Monte Carlo simulation is presented to assess the performance of proposed estimator. Numerical study results show that our proposed estimation outperforms other existing methods for heavy tailed distributions.The proposed methodology is also illustrated by Va R on stock price data. | ZHAO Biao CHEN Zhao TAO GuiPing CHEN Min | 2016 | Science China Mathematics2016，59，5： | 1 |
| 8 | High-resolution genetic mapping and identification of candidate genes for the wheat stem rust resistance gene Sr8155B1显示文摘Stem rust,caused by Puccinia graminis f.sp.tritici(Pgt),threatens global wheat production.Development of cultivars with increased resistance to stem rust by identification,mapping,and deployment of resistance genes is the best strategy for controlling the disease.In this study,we performed fine mapping and characterization of the all-stage stem rust resistance(Sr)gene Sr8155B1 from the durum wheat line 8155-B1.In seedling tests of biparental populations,Sr8155B1 was effective against six Chinese Pgt races tested.In a segregating population of 5060 gametes,Sr8155B1 was mapped to a 0.06-cM region flanked by markers Pku2772 and Pku43365,corresponding to 1.5-and 2.7-Mb regions in the Svevo and Chinese Spring reference genomes.Both regions include several typical nucleotide-binding leucine-rich repeat(NLR)and protein kinase genes that represent candidate genes.Among them,three NLR genes and three receptor-like protein kinases were highly polymorphic between the parental lines and their transcripts were upregulated in the homozygous resistant line TdR2 relative to its susceptible sister line TdS4.Four markers(Pku2772,Pku43365,Pku2950,and Pku3721)developed in this study,together with seedling resistance responses,correctly predicted Sr8155B1 absence or presence in 78 tetraploid wheat genotypes tested.The presence of Sr8155B1 in tetraploid wheat accessions CItr 14916,PI 197492,and PI 197493 was confirmed by mapping in three F_(2)populations.The genetic map and linked markers developed in this study may accelerate the deployment of Sr8155B1-mediated resistance in wheat breeding programs. | Jian Wang Hongyu Li Tao Shen Shikai Lyu Shams ur Rehman Hongna Li Guiping Wang Binyang Xu Qing Wang Wanyi Hu Kairong Li Shengsheng Bai Jian Ma Haitao Yu Matthew N.Rouse Shisheng Chen | 2023 | The Crop Journal2023，11，6： | 0 |
| 9 | A metallogenic model for the supergiant gold system in Jiaodong province:Constraints from crustal velocity structure显示文摘We investigate the role of crustal architectures playing in controlling the genesis and nature of supergiant Jiaodong orogenic gold system via seismic imaging.We deployed an NWW-SEE-trending broadband seismic linear array traversing the province to construct a shear wave velocity(V_S)transect based on ambient noise tomography.Our crustal V_S transect reveals a prominent low velocity zone(LVZ)at 12–20 km depths across the whole province and high V_S anomalies at 8–12 km depths underneath the western part that hosts most of the ore tonnage.We interpret the former as a hydrothermal alteration zone related to mineralization and the latter as a crustal component containing large amounts of mafic rocks(e.g.,amphibolites).In addition,a listric fault system and a strike-slip fault system are imaged in the western and eastern parts of the province,respectively.Combining features of crustal velocities with regional geological observations that ores are tempo-spatially associated with mafic dikes,we propose a model of gold metallogenic processes.In this model,ponding and degassing of the mafic magmas led to the formation of a hydrothermal alteration LVZ in the middle crust prior to mineralization.Later,auriferous fluid was released from this intra-crustal hydrothermal alteration zone as it was heated by upwelling asthenosphere.The ore fluid ascending along the listric fault system possibly leached extra gold from the upper-crustal amphibolites.Then,the gold-rich fluid migrated up along different fault systems,leading to the disseminated-veinlet mineralization with great gold endowment in the western listric fault system and the quartz-vein type mineralization with relatively small ore tonnage in the eastern strike-slip fault system. | Jue HOU Tao XU Yinshuang AI Guiping YU Yingjie YANG Bo XU Qingfei WANG | 2023 | Science China Earth Sciences2023，66，12： | 0 |
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