美洲商陆不同外植体组培的初步研究

以美洲商陆(Phytolacca americana L.)叶、下胚轴、根尖为外植体,初步研究了3者最适于诱导形成愈伤组织的激素种类和浓度水平.研究证实,叶诱导愈伤组织的最佳培养基为:MS+0.1 mg.L-16-苄基腺嘌呤(6-BA)+0.1 mg.L-1吲哚丁酸(IBA)+0.1 mg.L-1赤霉素(GA)3+300mg.L-1水解乳蛋白(LH)+30g.L-1蔗糖+9.0g.L-1琼脂,pH5.8.下胚轴诱导愈伤组织的最佳培养基为:MS+0.1mg.L-16-苄基腺嘌呤(6-BA)+0.1 mg.L-1赤霉素(GA)3+300 mg.L-1水解乳蛋白(LH)+30 g.L-1蔗糖+9.0 g.L-1琼脂,pH5.8.根尖诱导愈伤组织的最佳培养基为:MS+5.0 mg.L-16-苄基腺嘌呤(6-BA)+5.0 mg.L-1吲哚丁酸(IBA)+0.1 mg.L-1赤霉素(GA3)+300 mg.L-1水解乳蛋白(LH)+30g.L-1蔗糖+9.0g.L-1琼脂,pH5.8.     

凤仙花的组织培养与离体快繁

以凤仙的带芽茎段、茎尖、幼叶为外植体,在附加不同种类及浓度的植物激素的MS培养基上进行快速繁殖,诱导芽的最适培养基为MS 0.5 mg·L-1 BA 0.01 mg·L-1 IAA 0.01 mg·L-1 GA3,芽的增殖培养基为MS 1.0 mg·L-1 BA 0.01 mg·L-1 IAA 0.01 mg·L-1 GA3;增殖系数为6～8倍.根诱导最佳培养基为MS 0.1～0.5 mg·L-1 BA 0.005 mg·L-1 IAA.     

大洋洲滨藜不定芽离体再生体系研究

大洋洲滨藜是一种具有广泛应用价值的耐盐植物。为解决大洋洲滨藜快速繁殖问题,利用从澳大利亚引进的大洋洲滨藜茎段,建立了大洋洲滨藜的不定芽离体再生体系。研究了不同消毒方法、消毒时间、不同激素浓度对不定芽诱导和再生苗生根的影响;并经过靠苗将大洋洲滨藜再生幼苗成功移栽。结果表明:对大洋洲滨藜茎段的最适消毒方法为0.1%升汞(HgCl_2)消毒10 min,最适宜的不定芽诱导培养基为MS+2~3 mg·L~(-1)6-BA+0.1~0.2 mg·L~(-1)NAA+20 g·L~(-1)蔗糖+7 g·L~(-1)琼脂(pH 5.8),大洋洲滨藜再生苗最适宜的生根诱导培养基为1/2MS+0.3 mg·L~(-1)NAA+10 g·L~(-1)蔗糖+7 g·L~(-1)琼脂(pH 5.8)     

带毒梨茎尖的玻璃化法超低温保存及其植株再生

以带毒梨茎尖为材料研究了预培养时间、PVS2处理时间、超低温(-196 ℃)保存时间以及材料大小对超低温保存后梨茎尖再生率的影响. 结果表明,茎尖(1.5～2.5 mm)在预培养基(MS 2 mol·L-1甘油 0.4 mol·L-1 蔗糖 0.7%琼脂)上培养2 d后,先用60% PVS2 于室温条件下预处理20 min,再用100% PVS2于0℃处理2 h,快速投入液氮中保存,24 h后取出,接种到再生培养基(MS 1.0 mg·L-1 6-BA 0.2 mg·L-1 NAA 3%蔗糖 0.7%琼脂)上,暗培养3～8 d后,进行光照培养,最高成活率可达71%,且再生苗与常温苗形态指标差异不大.     

苦苣菜下胚轴愈伤组织分化及试管苗培养研究

为保护苦苣菜野生资源,以苦苣菜下胚轴为材料,进行了愈伤组织诱导培养、分化培养、生根培养和试管苗移栽及定植的研究,结果表明:MS+琼脂4.8 g·L-1+蔗糖42 g·L-1+KT 0.4 mg·L-1+NAA 0.2 mg·L-1+2,4-D2.0 mg·L-1是愈伤组织诱导生长的适宜培养基;1/2 MS+琼脂4.5 g·L-1+蔗糖35 g·L-1+ZT 0.8 mg·L-1+NAA 0.1 mg·L-1是愈伤组织块分化培养的适宜培养基;1/4 MS+IAA 0.6 mg·L-1+琼脂4.3 g·L-1+蔗糖15g·L-1是生长芽试管苗培养的适宜培养基;温室内试管苗移栽成活率为91.7%;试管苗在山林旁定植成活率为97.1%,定植试管苗的植物学性状与实生苗基本一致.     

食用药百合组织培养及其多倍体诱导研究

对食用药百合进行了组织培养和多倍体诱导研究。以百合的鳞片和正在生长的茎尖作为外植体,采用MS培养基作为基本培养基,设置不同浓度激素研究组织培养快繁的最佳方法;在离体培养条件下,初步比较了不同浓度的秋水仙素处理百合的诱变效果。结果表明：在温度25±2℃,光照15h/d,光照强度2000lx,培养基中加蔗糖30g/L、琼脂8g/L、pH5.8培养条件下,鳞片诱导的最适培养基为MS＋6-BA1.5mg/L＋NAA0.2mg/L,茎尖不定芽诱导的最适培养基为MS＋6-BA1.5mg/L＋NAA0.1mg/L,生根的最适培养基为1/2MS＋KT0.1mg/L＋NAA0.2mg/L;0.05%的秋水仙素处理12h诱变效果最佳,诱变率高达40%。     

胼胝兜兰的无菌播种和快速繁殖

1植物名称胼胝兜兰(Paphiopedilum callosum (Rchb.f.)Stein). 2材料类别种子.3培养条件种子萌发培养基:(1)1/4MS;(2)1/2MS;(3)MS;(4)花宝1号(美国Haponex公司产品,N:P:K=7:6:19)3.0 g·L-1.原球茎增殖和分化成苗培养基:(5)1/4MS+6-BA1.0 mg·L-1(单位下同)+NAA0.1;(6)1/4MS+6-BA1.0+NAA0.1+AgN031.0;(7)花宝1号3.0 g·L-1 +6-BA1.0+NAAO.1;(8)花宝1号3.0 g·L-1+6-BA1.0+NAA0.1+AgN031.0壮苗生根培养基:(9)花宝1号3.0 g·L-1+10%香蕉汁+1.0 g·L-1活性炭;(10)花宝1号3.0 g·L-1+10%香蕉汁+1.0 g·L-1活性炭+NAA1.0.以上培养基均添加2.0%蔗糖,0.58%琼脂固化,pH 5.4-5.6.培养温度为(25±1)℃,光照强度30-50μmol·m-2·s-1,光照时间10-12 h·d-1.培养基(1)～(8)均添加100 mL·L-1椰子乳,培养基(1)～(4)均添加活性炭1.0 g·L-1.     

美洲商陆高频再生体系的建立

美洲商陆为商陆科多年生草本植物,在工业、农业和医药上具有很高的应用价值.本实验拟从外植体选择、激素组合、GA3和AgNO3等物质应用角度进行试验,分析各条件对愈伤组织诱导,不定芽分化、伸长以及不定根诱导等方面的影响,旨在构建美洲商陆稳定高效的再生体系.实验结果表明:愈伤组织诱导和不定芽分化的最适外植体为茎节;将无菌苗的上部经诱导培养基转接、壮苗后,再取茎节进行愈伤组织诱导和不定芽分化,可以显著提早不定芽分化、提高芽增殖系数;不定芽诱导分化最佳培养基为MS+6-BA(3.0 mg/L)+NAA(0.01 mg/L)+TDZ(0.02 mg/L),增殖系数达12.7;不定芽伸长的最佳培养基为MS+TDZ(0.02 mg/L)+6-BA(3.0 mg/L)+NAA(0.01 mg/L)+GA3(2.0 mg/L);生根最佳培养基为1/2MS+NAA(0.4 mg/L),生根率可达91.7%以上.AgNO3处理抑制了美洲商陆不定芽的分化.     

松叶牡丹离体快速繁殖及瓶苗微型化培育技术研究

应用植物离体快繁技术对松叶牡丹瓶苗微型化培育技术的研究,结果表明:松叶牡丹的种子用0.1%的氯化汞灭菌5min效果最理想,成活率达到73.3%;最佳的增殖培养基配方:MS+6-BA 1.0mg·L~(-1)+IBA 0.05mg·L~(-1)+蔗糖30g·L~(-1)+琼脂9g·L~(-1);对松叶牡丹的壮苗情况来看,PP333的最佳质量浓度为0.5mg·L~(-1),芽苗在的培养基为MS+NAA 0.25mg·L~(-1)+PP3330.5mg·L~(-1)+蔗糖30g·L~(-1)+琼脂9g·L~(-1),植株矮壮,茎粗,叶片厚,茎叶红,根系发,有利瓶苗的花芽分化.     

射干幼茎愈伤组织及试管苗培养的研究

为保护野生资源,以射干幼茎为材料,应用植物组织培养技术,进行了愈伤组织培养、愈伤组织分化培养、试管苗培养和试管苗的移栽与定植的研究。结果显示,幼茎段培养愈伤组织的适宜培养基是MS+琼脂5.3 g·L-1+蔗糖38 g·L-1+2,4-D2.2 mg·L-1+6-BA 0.8 mg·L-1;愈伤组织分化无根苗培养的适宜培养基是1/2MS+琼脂5.3 g·L-1+蔗糖42 g·L-1+NAA0.05 mg·L-1+6-BA 1.4 mg·L-1;试管苗培养的适宜培养基是1/4MS+蔗糖10 g·L-1+琼脂5.3 g·L-1+IBA0.05 mg·L-1+IAA0.25 mg·L-1;试管苗移栽成活率为90.3%;定植成活率为96.0%。定植试管苗翌年正常开花结果,野生的射干的植物性状保持不变。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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