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Theoretical modeling of the effects of temperature and moisture content on the acoustic velocity of Pinus resinosa wood

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Journal of Forestry Research 2018年第2期29卷 532-539页

作者： Shan Gao Xinmin Tao xiping wang Lihai wang Northeast Forestry University Harbin 150040People’s Republic of China USDA Forest Products Laboratory MadisonWI 53745USA

To investigate the effects of temperature and moisture content(MC) on acoustic wave velocity(AWV)in wood,the relationships between wood temperature,MC,and AWV were theoretically *** to the theoretical propagation characteristics of the acoustic waves in the wood mixture and the differences in velocity among various media(including ice,water,pure wood or oven-dried wood),theoretical relationships of temperature,MC,and AWV were established,assuming that the samples in question were composed of a simple mixture of wood and water or of wood and *** the theoretical model,the phase transition of AWV in green wood near the freezing point(as derived from previous experimental results) was plausibly *** comparative analysis between theoretical and experimental models for American red pine(Pinus resinosa) samples,it was established that the theoretically predicted AWV values matched the experiment results when the temperature of the wood was below the freezing point of water,with an averageprediction error of 1.66%.The theoretically predicted AWV increased quickly in green wood as temperature decreased and changed suddenly near 0 °C,consistent with the experimental *** prediction error of the model was relatively large when the temperature of the wood was above the freezing point,probably due to an overestimation of the effect of the liquid water content on the acoustic velocity and the limited variables of the *** high correlation between the predicted and measured acoustic velocity values in frozen wood samples revealed the mechanisms of temperature,MC,and water status and how these affected the wood(particularly its acoustic velocity below freezing point of water).This result also verified the reliability of a previous experimental model used to adjust for the effect of temperature during field testing of trees.

关键词： Acoustic velocity Wood Temperature Moisture content Theoretical model

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Study of Seismic P Wave in Mesoscale Fracture-Induced Arbitrary Anisotropic Media

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Journal of Earth Science 2024年第2期35卷 717-721页

作者： Han Xiao Xinmin Shang Zhentao wang xiping wang Geophysical Research Institute SINOPEC Shengli Oilfield CompanyShandong 257022China Working Station for Postdoctoral Scientific Research Shengli OilfieldShandong 257000China

Mesoscale fracture controls the permeability of shale res ervoirs,it is one of the main research objectives of natural frac *** length of the mesoscale fracture is less than 1/4 of the seismic eigen wavelength and greater than 1%of the seis mic eigen wavelength,they cannot be identified in actual seis mic data and are usually displayed by the azimuthal anisotropy of seismic *** this paper,we propose a calculation process from fracture properties to seismic P-wave velocity and traveltime in anisotropic media induced by multiple sets of arbitrary occurring mesoscale *** on this process,the variations of the media’s Anisotropic(A-)parameters with fracture properties are ***,variation of P-wave NMO elliptical principle axis with the relative fracture density is studied according to the arbitrary anisotropic theory based on A-parameters.

关键词： seismic mesoscale shale

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Strain rate sensitivity of tensile properties in high Nb containing TiAl alloys

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Journal of University of Science and Technology Beijing 2005年第6期12卷 535-539页

作者： Jianfeng Gao Xiangjun Xu Junpin Lin xiping Song Yanli wang Guoliang Chen State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

The effect of strain rate on the yield strength of high Nb containing TiAl alloy was studied. The results show that the strain rate sensitivity varies with the test temperature, and the yield strength is not sensitive to the strain rate at room temperature but significantly sensitive to the strain rate at high temperature. An increase of the strain rate or a decrease of the temperature results in an obvious change of fracture mode. It is found that the strain rate sensitivity of this alloy varying with temperature is due to the dislocation climb generated at high temperature.

关键词： TiAl alloys strain rate tensile properties thermal activation

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Coarsening behavior of γ' particles in a nickel-base superalloy

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Rare Metals 2009年第2期28卷 197-201页

作者： Li, Hongyu Zuo, Lingli Song, xiping wang, Yanli Chen, Guoliang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

The coarsening behavior of γ particles in a nickel-base superalloy FGH95 was investigated by means of experimental observations and growth kinetics calculations. The results show that when aging at 1000,1080 and 1140°C for different times,the relation of average particle size to time obeys the cube law ( a /2)3= kt,where k is 15.49 × 103,77.5 × 103 and 230.04 × 103 nm3/min,respectively. The particle size distributions are better fit to the LSW theoretical distributions when aging at 1000°C within 1440 min....

关键词： nickel-base superalloys γ particles coarsening behavior particle size distribution activation energy

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VqMYB154 promotes polygene expression and enhances resistance to pathogens in Chinese wild grapevine

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Horticulture Research 2021年第1期8卷 1952-1968页

作者： Changyue Jiang Dan wang Jie Zhang Yan Xu Chaohong Zhang Jianxia Zhang xiping wang Yuejin wang College of Horticulture Northwest A&F University712100 YanglingShaanxiThe People’s Republic of China Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of Agriculture712100 YanglingShaanxiThe People’s Republic of China State Key Laboratory of Crop Stress Biology in Arid Areas Northwest A&F University712100 YanglingShaanxiThe People’s Republic of China

Resveratrol plays a crucial phytoalexin role in the grapevine and is beneficial to human ***,the molecular mechanism of resveratrol accumulation in the enhancement of disease resistance is ***,we report that the transcription factor VqMYB154 from Vitis quinquangularis accession Danfeng-2 is strongly expressed under artificial inoculation with Uncinula necator and regulates resveratrol *** its homolog,VqMYB154 has a pathogen-induced promoter and responds to stimulation by ***,Pseudomonas syringae,and other *** one-hybrid and GUS activity assays confirmed that VqMYB154 can activate the stilbene synthase genes VqSTS9,VqSTS32,and VqSTS42 by directly binding to their *** of VqMYB154 in grape leaves resulted in activation of the stilbene pathway,upregulation of STS genes,and accumulation of *** addition,heterologous overexpression of VqMYB154 in Arabidopsis activated resistance-related genes and resulted in greater programmed cell death and accumulation of reactive oxygen species,which led to resistance against *** results suggest that the transcription factor VqMYB154 from *** accession Danfeng-2 participates in the regulatory mechanism that improves the biosynthesis and accumulation of stilbenes and enhances resistance to disease in grapevine.

关键词： angular resistance activation

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VqMAPK3/VqMAPK6, VqWRKY33, and VqNSTS3 constitute a regulatory node in enhancing resistance to powdery mildew in grapevine

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Horticulture Research 2023年第7期10卷 293-308页

作者： Wandi Liu Chaohui Yan Ruimin Li Guanyu Chen Xinqi wang Yingqiang Wen Chaohong Zhang xiping wang Yan Xu Yuejin wang College of Horticulture Northwest A&F UniversityYanglingShaanxi712100China Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of AgricultureYanglingShaanxi712100China State Key Laboratory of Crop Stress Biology in Arid Areas Northwest A&F UniversityYanglingShaanxi712100China

Grapevine powdery mildew is caused by Erysiphe necator,which seriously harms grape production in the *** synthase makes phytoalexins that contribute to the resistance of grapevine against powdery mildew.A novel VqNSTS3 was identified and cloned from Chinese wild Vitis quinquangularis accession *** novel VqNSTS3 was transferred into susceptible‘Thompson Seedless’by Agrobacterium-mediated *** transgenic plants showed resistance to the disease and activated other resistance-related ***3 expression in grapevine is regulated by VqWRKY33,and which binds to TTGACC in the VqNSTS3 ***,VqWRKY33 was phosphorylated by VqMAPK3/VqMAPK6 and thus led to enhanced signal transduction and increased VqNSTS3 ***3::VqNSTS3-GFP of transgenic VqNSTS3 in Arabidopsis thaliana was observed to move to and wrap the pathogen’s haustoria and block invasion by Golovinomyces *** results demonstrate that stilbene accumulation of novel VqNSTS3 of the Chinese wild Vitis quinquangularis accession Danfeng-2 prevented pathogen invasion and enhanced resistance to powdery ***,VqNSTS3 can be used in generating powdery mildew-resistant grapevines.

关键词： invasion expression. resistance

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Grapevine VlbZIP30 improves drought resistance by directly activating VvNAC17 and promoting lignin biosynthesis through the regulation of three peroxidase genes

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Horticulture Research 2020年第1期7卷 1061-1075页

作者： Mingxing Tu Xianhang wang Wuchen Yin Ya wang Yajuan Li Guofeng Zhang Zhi Li Junyang Song xiping wang State Key Laboratory of Crop Stress Biology in Arid Areas College of HorticultureNorthwest A&F UniversityYangling 712100 ShaanxiChina Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of AgricultureNorthwest A&F UniversityYangling 712100 ShaanxiChina College of Enology Northwest A&F UniversityYangling 712100 ShaanxiChina

Drought stress severely affects grapevine quality and yield,and recent reports have revealed that lignin plays an important role in protection from drought *** little is known about lignin-mediated drought resistance in grapevine,we investigated its ***,we show that VlbZIP30 mediates drought resistance by activating the expression of lignin biosynthetic genes and increasing lignin *** grapevine plants overexpressing VlbZIP30 exhibited lignin deposition(mainly G and S monomers)in the stem secondary xylem under control conditions,which resulted from the upregulated expression of VvPRX4 and *** of VlbZIP30 improves drought tolerance,characterized by a reduction in the water loss rate,maintenance of an effective photosynthesis rate,and increased lignin content(mainly G monomer)in leaves under drought *** mobility shift assay,luciferase reporter assays,and chromatin immunoprecipitation-qPCR assays indicated that VlbZIP30 directly binds to the G-box cis-element in the promoters of lignin biosynthetic(VvPRX N1)and drought-responsive(VvNAC17)genes to regulate their *** summary,we report a novel VlbZIP30-mediated mechanism linking lignification and drought tolerance in *** results of this study may be of value for the development of molecular breeding strategies to produce drought-resistant fruit crops.

关键词： directly breeding drought

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Control of ovule development in Vitis vinifera by VvMADS28 and interacting genes

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Horticulture Research 2023年第6期10卷 43-55页

作者： Songlin Zhang Li wang Jin Yao Na Wu Bilal Ahmad Steve van Nocker Jiuyun Wu Riziwangguli Abudureheman Zhi Li xiping wang State Key Laboratory of Crop Stress Biology in Arid Areas College of HorticultureNorthwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxi 712100China College of Horticulture Hebei Agricultural UniversityBaoding 071000China Agriculture Genomics Institute Chinese Academy of Agricultural SciencesShenzhen 518000China Department of Horticulture Michigan State UniversityEast LansingMI 48823USA Turpan Research Institute of Agricultural Sciences Xinjiang Academy of Agricultural SciencesTurpan 838000XinjiangChina

Seedless grapes are increasingly popular throughout the world,and the development of seedless varieties is a major breeding *** this study,we demonstrate an essential role for the grapevine MADS-box gene VvMADS28 in morphogenesis of the *** found that VvMADS28 mRNA accumulated in the ovules of a seeded cultivar,‘Red Globe’,throughout the course of ovule and seed development,especially within the integument/seed *** contrast,in the seedless cultivar‘Thompson Seedless’,VvMADS28 was expressed only weakly in ovules,and this was associated with increased levels of histone H3 lysine 27 trimethylation(H3K27me3)within the VvMADS28 promoter ***-mediated transient suppression of VvMADS28 expression in‘Red Globe’led to reduced seed size associated with inhibition of episperm and endosperm cell *** overexpression of VvMADS28 in transgenic tomatoes interfered with sepal development and resulted in smaller fruit but did not obviously affect seed *** in yeast cells showed that VvMADS28 is subject to regulation by the transcription factor VvERF98,and that VvMADS28 could interact with the Type I/MβMADS-domain protein ***,through DNA-affinity purification-sequencing(DAP-seq),we found that VvMADS28 protein specifically binds to the promoter of the grapevine WUSCHEL(VvWUS)gene,suggesting that maintenance of the VvMADS28–VvMADS5 dimer and VvWUS expression homeostasis influences seed *** together,our results provide insight into regulatory mechanisms of ovule and seed development associated with VvMADS28.

关键词： Vitis homeostasis breeding

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Ectopic expression of VvFUS3,B3-domain transcription factor,in tomato influences seed development via affecting endoreduplication and hormones

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Horticultural Plant Journal 2022年第3期8卷 351-360页

作者： Bilal Ahmad Songlin Zhang Jin Yao Shengyue Chai Vivek Yadav Habib-ur-Rehman Athar Mati Ur Rahman Li wang xiping wang State Key Laboratory of Crop Stress Biology in Arid Areas College of HorticultureNorthwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxi 712100China Institute of Pure and Applied Biology Bahauddin Zakariya UniversityMultan 60800Pakistan College of Food Engineering and Nutritional Science Shaanxi Normal UniversityXi’an 710119China College of Horticulture Hebei Agricultural UniversityBaodingHebei 071000China

FUSCA3(FUS3)is a member of B3-domain transcription factor family and master regulator of seed *** has potential roles in hormone biosynthesis and signaling pathways and therefore plays diverse roles in plant life cycle,especially in seed germination,dormancy,embryo formation,seed and fruit development,and ***,there is limited information about its functions in seed and fruit development of *** this study,we expressed VvFUS3 in tomato for its functional *** of VvFUS3 in tomato led to a reduction in seed number and seed weight without affecting the fruit *** analysis found that both cell expansion and cell division in transgenic seed and fruit pericarp have been ***,there were no obvious differences in pollen size,shape,and viability,suggesting that VvFUS3 affects seed development but not the pollen ***,the expression of several genes with presumed roles in seed development and hormone signaling pathways was also influenced by *** results suggest that VvFUS3 is involved in hormonal signaling pathways that regulate seed number and *** conclusion,our study provides novel preliminary information about the pivotal roles of VvFUS3 in seed and fruit development and these findings can potentially serve as a reference for molecular breeding of seedless grapes.

关键词： Vitis vinifera L. ABI3 B3 transcription factor Seed number Endoreduplication Hormone

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Whole-genome sequencing reveals rare off-target mutations in CRISPR/Cas9-edited grapevine

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Horticulture Research 2021年第1期8卷 1352-1362页

作者： Xianhang wang Mingxing Tu Ya wang Wuchen Yin Yu Zhang Hongsong Wu Yincong Gu Zhi Li Zhumei Xi xiping wang State Key Laboratory of Crop Stress Biology in Arid Areas College of HorticultureNorthwest A&F University712100 YanglingShaanxiChina College of Enology Northwest A&F University712100 YanglingShaanxiChina Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of AgricultureNorthwest A&F University712100 YanglingShaanxiChina Novogene Technologies Corporation 100000 BeijingChina OEbiotech Corporation 200000 ShanghaiChina

The CRISPR(clustered regularly interspaced short palindromic repeats)-associated protein 9(Cas9)system is a powerful tool for targeted genome editing,with applications that include plant biotechnology and functional genomics ***,the specificity of Cas9 targeting is poorly investigated in many plant species,including fruit *** assess the off-target mutation rate in grapevine(Vitis vinifera),we performed whole-genome sequencing(WGS)of seven Cas9-edited grapevine plants in which one of two genes was targeted by CRISPR/Cas9 and three wild-type(WT)*** total,we identified between 202,008 and 272,397 single nucleotide polymorphisms(SNPs)and between 26,391 and 55,414 insertions/deletions(indels)in the seven Cas9-edited grapevine plants compared with the three WT ***,3272 potential off-target sites were selected for further *** one off-target indel mutation was identified from the WGS data and validated by Sanger *** addition,we found 243 newly generated off-target sites caused by genetic variants between the Thompson Seedless cultivar and the grape reference genome(PN40024)but no true off-target *** conclusion,we observed high specificity of CRISPR/Cas9 for genome editing of grapevine.

关键词： Whole Sanger rare

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