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Effect of polyamine on seed germination of wheat under drought stress is related to changes in hormones and carbohydrates

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Journal of Integrative Agriculture 2016年第12期15卷 2759-2774页

作者： LIU Yang XU Hong wen xiao-xia LIAO Yun-cheng College of Agronomy Northwest A&F University

Drought is a multifaceted stress condition that inhibits crop growth. Seed germination is one of the critical and sensitive stages of plants, and its process is inhibited or even entirely prevented by drought. Polyamines （PAs） are closely associ- ated with plant resistance to drought stress and seed germination. However, little is known about the effect of PA on the seed germination of wheat under drought stress. This study investigated the involvement of PAs in regulating wheat seed germination under drought stress. Six wheat genotypes differing in drought resistance were used, and endogenous PA levels were measured during seed germination under different water treatments. In addition, external PAwas used for seed soaking and the variation of hormones, total soluble sugar and starch were measured during the seed germination under different water treatments. These results indicated that the free spermidine （Spd） accumulation in seeds during the seed germination period favored wheat seed germination under drought stress; however, the free putrescine （Put） accumulation in seeds during the seed germination period may work against wheat seed germination under drought stress. In addition, seed soaking in Spd and spermine （Spm） significantly relieved the inhibition of seed germination by drought stress; howev- er, soaking seeds in Put had no significant effect on seed germination under drought. External Spd and Spm significantly increased the endogenous indole-3-acetic acid （IAA）, zeatin （Z）＋zeatin riboside （ZR）, abscisic acid （ABA）, and gibberellins （GA） contents in seeds and accelerated the seed starch degradation and increased the concentration of soluble sugars in seeds during seed germination. This may promote wheat seed germination under drought stress. In conclusion, free Spd and Put are key factors for regulating wheat seed germination under drought stress and the effects of Spd and Put on seed germination under drought notably related to hormones and starch metab

关键词： polyamine drought seed germination wheat abscisic acid starch

Effects of Water-Collecting and -Retaining Techniques on Photosynthetic Rates, Yield, and Water Use Efficiency of Millet Grown in a Semiarid Region

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Journal of Integrative Agriculture 2012年第7期11卷 1119-1128页

作者： wen xiao-xia ZHANG De-qi LIAO Yun-cheng JIA Zhi-kuan JI Shu-qin College of Agronomy Northwest A&F University Yangling 712100 P.R.China Wheat Research Centre Henan Academy of Agricultural Sciences Zhengzhou 450002 P.R. China

Field experiments were conducted in 2003 and 2004 to study the effects of plastic ridges and furrow film mulching （plastic film on sowing, as well as plastic film on flat soil and hole sowing） and chemicals （a drought resistant agent and a water- retaining agent） on growth, photosynthetic rate, yield, and water use efficiency （WUE） of spring millet （Setaria italica L.）. The experimental results showed that water-collecting and -retaining techniques can effectively increase soil moisture content, the leaf photosynthetic rate and crop growth. Due to increased soil moisture under the plastic-covered ridge and furrow water-collecting in July and August, dry matter and plant height had a increase at the booting stage （late growth advantage）. However, the plastic-covered flat soil and hole sowing reduced soil evaporation during early growth, the increase of dry matter and plant height appeared at the seedling stage （early growth advantage）. Plastic-covered ridge and furrow sowing supplemented with chemical reagents had significant positive effects on water collection and soil moisture retention. Improvement of soil moisture resulted into the increase of the photosynthetic rate, dry matter accumulation yield and WUE. The water-collecting and -retaining techniques can improve WUE and enhance crop yield. Correlation analysis demonstrated that the photosynthetic rate under the water-collecting and -retaining techniques was significantly associated with the soil moisture, but had no significant relationship with leaf chlorophyll content. Plastic- covered ridge and furrow sowing supplemented with chemical reagents increased the yield and WUE by 114% and 8.16 kg ha-1 mm-1, respectively, compared with the control; while without the chemical reagents the yield and WUE were 95% and 7.42 kg ha-1 mm-1 higher, respectively, than those of the control.

关键词： water use efficiency Loess Plateau of China plastic film mulch drought-resistant agent water-retaining agent

The Effect of Plastic-Covered Ridge and Furrow Planting on the Grain Filling and Hormonal Changes of Winter Wheat

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Journal of Integrative Agriculture 2013年第10期12卷 1771-1782页

作者： LIU Yang HAN Juan wen xiao-xia WU Wei GUO Qiang ZENG Ai LIAO Yun-cheng College of Agronomy Northwest A&F University

Although plastic-covered ridge and furrow planting（RF） has been reported to produce substantial increases in the grain weight of winter wheat,the underlying mechanism is not yet *** present study used two cultivars,Xinong 538 and Zhoumai 18,and RF and traditional flatten planting（TF,control） with the objective of investigating the effect of RF on wheat grain filling and the possible relationship of hormonal changes in the wheat grains under RF to grain *** results indicated that RF significantly increased the grain weight,although the effects on grain filling were different： RF significantly increased the grain-filling rate and grain weight of inferior grains,whereas RF had no significant effect on grainfilling rate and grain weight of superior *** final grain weight of inferior grains under RF was 39.1 and 50.7 mg for Xinong 538 and Zhoumai 18,respectively,3.6 and 3.4 mg higher than the values under ***,the final grain weight of superior grains under RF was only 0.6 and 0.8 mg higher than under TF for Xinong 538 and Zhoumai 18,*** significantly decreased the ethylene and gibberellic acid content in the inferior grains and increased the indole-3-acetic acid,abscisic acid and zeatin ＋ zeatin riboside content in the inferior grains;however,no significant difference between RF and TF was observed for the hormonal content in the superior *** on these results,we concluded that RF significantly modulated hormonal changes in the inferior grains and,thus,affected the grain filling and grain weight of the inferior grains;in contrast,RF had no significant effect on grain filling,grain weight and hormonal changes in the superior wheat grains.

关键词： plastic-covered ridge and furrow planting wheat grain filling hormone

Nursing effect of narrative nursing intervention on postoperative patients with severe lung cancer

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World Journal of Clinical Cases 2024年第1期12卷 76-85页

作者： Bin wen Ying Liu xiao-xia Min An-Qi Wang Department of Intensive Care Tongren Hospital of Wuhan University and Wuhan Third HospitalOptics Valley BranchWuhan 430074Hubei ProvinceChina The First Department of Thoracic Oncology Hubei Cancer Hospital Affiliated to Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430079Hubei ProvinceChina Department of Emergency Medicine Taizhou First People's HospitalTaizhou 318020Zhejiang ProvinceChina

BACKGROUND Lung cancer is a common disease with high mortality,and psychological support is very important in the diagnosis and treatment of postoperative patients with cancer *** To explore the application effect of the narrative nursing method in postoperative lung cancer patients in the intensive care *** A total of 120 patients diagnosed with lung cancer and experiencing cancer-related pain were randomly allocated into two groups:an observation group and a control group,each consisting of 60 *** control group was given routine analgesic and psychological care,while the research group applied the five-step narrative nursing method based on routine care,comparing the visual analogue scale scores,sleep status,anxiety and depression status,and quality of life of the two groups of patients before and after the *** The pain scores,anxiety scores,and depression scores of the study group were lower than those of the control group after the intervention using the narrative nursing method,and the difference was statistically significant(P<0.05).CONCLUSION Using narrative nursing methods to intervene in patients with lung cancer combined with cancerous pain can help patients to correctly recognize their disease,adjust their mentality,establish confidence,alleviate patients'subjective pain feelings,and improve their adverse emotions.

关键词： Narrative care Lung cancer Care unit Pain Quality of life

改良中药硬膏热贴敷联合BTA治疗中风后肩痛患者的临床疗效及对其神经功能的影响

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世界中西医结合杂志 2024年第2期19卷 297-301页

作者：李玉玲郝娜张明明肖文霞李洪梅衡水市中医医院影像科河北衡水053000 衡水市中医医院脑病科河北衡水053000 衡水市中医医院肺病科河北衡水053000 衡水市中医医院脾胃科河北衡水053000

目的探究改良中药硬膏热贴敷配合A型肉毒毒素(Botulinum toxin A,BTA)治疗中风后肩痛(Hemiplegic shoulder pain, HSP)患者的临床疗效。方法选取2021年1月—2022年9月期间衡水市中医医院脑病门诊就诊及住院的中风后肩痛患者200例,按... 详细信息

目的探究改良中药硬膏热贴敷配合A型肉毒毒素(Botulinum toxin A,BTA)治疗中风后肩痛(Hemiplegic shoulder pain, HSP)患者的临床疗效。方法选取2021年1月—2022年9月期间衡水市中医医院脑病门诊就诊及住院的中风后肩痛患者200例,按随机数字表法分为对照组和观察组,每组各100例。对照组给予A型肉毒毒素治疗,观察组在对照组基础上给予改良中药硬膏热贴敷配合A型肉毒毒素治疗。持续治疗8周。观察比较两组患者临床疗效,治疗前后炎性因子[血清白细胞介素1β(Interleukin-1β,IL-1β)及一氧化氮(Nitric oxide, NO)]水平、扩展Barthel指数(Extended barthel index, EBI)量表评分、上肢简化Fugl-Meyer法(Fugl-Meyer assessment, FMA)评分、疼痛视觉模拟评分法(Visual analogue scale, VAS)评分、美国国立卫生研究院卒中量表(The national institutes of health stroke scale, NIHSS)评分、肩关节活动度评分。结果治疗后观察组总有效率94.00%(94/100)高于对照组81.00%(81/100),差异有统计学意义(P<0.05)。治疗后两组患者炎症因子IL-1β、NO水平较治疗前降低,差异有统计学意义(P<0.05);且观察组低于对照组,差异有统计学意义(P<0.05)。治疗后两组患者EBI、FMA评分较治疗前升高,差异有统计学意义(P<0.05);且观察组高于对照组,差异有统计学意义(P<0.05)。治疗后两组患者VAS、NIHSS评分较治疗前降低,差异有统计学意义(P<0.05);且观察组低于对照组,差异有统计学意义(P<0.05)。治疗后两组患者肩关节外展、外旋、屈曲活动度评分较治疗前升高,差异有统计学意义(P<0.05);且观察组高于对照组,差异有统计学意义(P<0.05)。结论改良中药硬膏热贴敷配合BTA治疗能够改善中风后肩痛患者的上肢神经功能、肩关节活动度以及日常生活能力,缓解其疼痛,治疗效果显著优于单独BTA治疗。

关键词：中风后肩痛改良中药硬膏热贴敷 A型肉毒毒素神经功能

Improved Efficiency Droop in a GaN-Based Light-Emitting Diode with an AlInN Electron-Blocking Layer

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Chinese Physics Letters 2012年第9期29卷 174-176页

作者： wen xiao-xia YANG xiao-Dong HE Miao LI Yang WANG Geng LU Ping-Yuan QIAN Wei-Ning LI Yun ZHANG Wei-Wei WU wen-Bo CHEN Fang-Sheng DING Li-Zhen Laboratory of Micro-nano Photonic Functional Materials and Devices of Guangdong Province Institute of Optoelectronic Materials and TechnologySouth China Normal UniversityGuangzhou 510631 The School of Chemistry The University of St.AndrewsFife KY169SU.K.

GaN-based light-emitting devices(LEDs)with different electron blocking layers are theoretically studied and compared by using the advanced physical models of a semiconductor device simulation *** is found that the structure with an AlInN electron blocking layer shows improved light output power,lower current leakage and efficiency *** on numerical simulation and analysis,these improvements of the electrical and optical characteristics are mainly accounted for by efficient electron *** can be concluded that Auger recombination is responsible for the dominant origin of the efficiency droop of a GaN-based LED as current increases.

关键词： Efficiency GaN Electron

Thermodynamic nature of black holes in coexistence region

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 27-32页

作者： Shao-wen Wei Yu-xiao Liu Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory of Quantum Theory and Applications of Mo ELanzhou UniversityLanzhou 730000China Institute of Theoretical Physics&Research Center of Gravitation Lanzhou UniversityLanzhou 730000China

Studying the system state of coexistence regions will peek into to reveal microscopic interactions between different phases of a thermodynamic ***,there is no effective method to study thermodynamic nature of the coexistence black hole regions for the failure of the equation of *** at these coexistence states,in this work,we develop a general approach by introducing two new ratio *** first one is the ratio of the horizon radii of the saturated coexistence small and large black holes,and the second one measures that of the small black hole molecule number to the total molecule *** demonstrate that the first parameter can serve as an order parameter to characterize the first-order phase *** study also shows that the black hole state in the coexistence region is uniquely determined by these two introduced parameters bounded between 0 and *** results are quite significant in the analytical study of phase transition and the microscopic nature of black hole in the coexistence regions.

关键词： transition. state. thermodynamic

Effect of BaO and MgO on structure and properties of aluminate slag with various CaO/Al_(2)0_(3)ratios

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Journal of Iron and Steel Research International 2024年第1期31卷 204-214页

作者： Yu-qi Kong Ting Wu wen-zhi xia wen Yang Hai-chuan Wang School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resource Recycling(Ministry of Education) Anhui University of TechnologyMa’anshan243002AnhuiChina

To provide theoretical guidance for performance stability control of low-reactive mold fluxes,the effects of BaO and MgO on the structure and properties of aluminate slag with various CaO/Al_(2)0_(3)(C/A)ratios were investigated using the Fourier transform infrared spectrometer,Raman spectroscope,hemispherical melting point instrument,rotational viscometer and X-ray *** results indicated that with BaO and MgO addition,the structure polymerization was first weakened and then enhanced at C/A of 1.1,and the transition contents corresponded to 8 wt.%BaO and 2 wt.%MgO,respectively,while the structure polymerization decreased continuously at C/A of *** the viscosity change was well consistent with the structure evolution,the polymerization degree played a more prominent role in the slag viscosity than superheat degree when the melting temperature difference was within 40℃.The break temperature decreased initially and then increased with augment of BaO and MgO at C/A of 1.1,while it manifested a decrease trend with BaO addition,and it decreased obviously but then turned to increase with MgO increment at C/A of *** crystallization phase and crystallization ratio kept stable with BaO increment,while the crystallization ratio rose greatly with MgO promoting LiAlO_(2)precipitation at C/A of *** crystal types of all experimental slags were mainly Ca_(12)Al_(14)O_(33)and CaF_(2)at C/A of 1.3,and the precipitation of crystalline phase BaAl2O4 demonstrated a rising trend,while that of Ca_(12)Al_(14)O_(33)gradually declined with BaO augment.

关键词： Aluminate slag Structure MgO BaO Viscosity Property

Harmonic Transfer Function Based Single-input Single-output Impedance Modeling of LCC-HVDC Systems

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1327-1332页

作者： Yang Wang Fei xia Ying Wang xianyong xiao College of Electrical Engineering Sichuan UniversityChengdu 610065China

This study presents a harmonic transfer function(HTF)based single-input single-output(SISO)impedance modeling *** method converts an HTF from phase domain to sequence domain and then transforms it into an SISO impedance while preserving the frequency coupling information of different sequences and different *** of this method to a line-commutated converter based high-voltage direct current(LCC-HVDC)system are *** results demonstrate the accuracy of the derived SISO impedance,and a truncation-order selection is *** case study shows that the proposed method facilitates simpler impedance measurements and associated stability analysis.

关键词： Line-commutated converter based high-voltage direct current(LCC-HVDC) harmonic transfer function(HTF) single-input single-output(SISO)impedance frequency coupling