圆叶椒草叶片组织培养研究

以圆叶椒草的叶片为外植体,研究不同激素浓度组合对圆叶椒草愈伤组织的诱导、不定芽分化、丛生芽生长及生根的影响.实验结果表明,愈伤组织诱导和芽分化的最适培养基为MS+6-BA 2.0mg·L-1+NAA 0.2mg·L-1,丛生芽生长的最适培养基为MS+6-BA 2.5mg·L-1+NAA 0.25mg·L-1;生根的最适培养基为MS+NAA 0.1mg·L-1,试管苗移栽后成活率为100%.     

黑果枸杞的组织培养和快速繁殖

本研究以黑果枸杞(Lycium ruthenicum)为对象,对其愈伤组织诱导、不定芽分化、诱导生根的培养条件进行筛选,并探究了黑果枸杞实验室试管苗的大田移栽.结果表明,诱导愈伤组织最适培养基为:MS+0.5mg·L-1 6-BA+0.1mg·L-1 2,4-D+10g·L-1蔗糖,出愈率达88%,愈伤组织生长状态良好;不定芽分化增殖的最适培养基为:MS+0.2mg·L-1 6-BA+10g·L-1蔗糖,不定芽增殖倍数达5.05倍;诱导生根最适培养基为:MS+0.1mg·L-1 IBA+5g·L-1蔗糖,生根率为95%.逐级炼苗后的试管苗大田移栽成活率达90%.     

怀地黄85-5叶片愈伤组织快速诱导和植株再生的研究

以怀地黄85-5无菌苗的叶片为外植体,接种到含有不同浓度植物生长物质的MS培养基上,可诱导愈伤组织,进而可分化出芽和根,从而实现了由叶片到完整植株的快速繁殖.本实验着重研究了不同浓度的6-BA对怀地黄叶片愈伤组织芽的分化的影响,及在何种浓度诱导愈伤组织和芽的分化时间最短.结果表明培养基中加入1.0 mg.L-1的6-BA最有利于怀地黄愈伤组织芽的分化,同时,在该浓度芽的分化所需时间最短.这种经快速诱导形成的不定芽经生根培养后可进行移栽,移栽后成活率可达90%.     

影响麻疯树叶片离体再生条件的优化

为建立高效稳定的麻疯树离体再生体系,优化了诱导和分化培养基及培养条件.以无菌苗叶片为外植体,以MS为基本培养基,6-BA 2.0mg/L+2,4-D 0.02mg/L的激素组合对愈伤组织的诱导最有利,6-BA 0.5mg/L+KT 0.5mg/L+IBA 0.1mg/L+GA30.1mg/L的激素组合对不定芽分化最有利.在此基础上针对外植体培养、愈伤组织继代的培养条件和继代次数3个因素进行优化.结果表明:采用麻疯树的无菌苗叶片为外植体,黑暗条件下诱导出愈伤组织,再在黑暗条件下继代一次后转入分化培养基中对不定芽诱导最为有利,分化率达72.59%.分化后得到的不定芽在含IBA 0.2mg/L的MS培养基上生根率达75%.生根苗在添加蛭石的含IBA 0.05mg/L的改良生根培养基中驯化培养后,再经过以蛭石∶腐殖土=1∶1(V/V)为培养基质的套袋培养,移栽后成活率达93%.     

火炬姜叶片培养及植株再生

报道了火炬姜叶片离体培养的研究结果 ,试验表明 :诱导叶片产生愈伤组织效果较好的激素配比是 6 -BA 0 .5mg·L- 1+ 2 ,4 -D 0 .5mg·L- 1;最适于愈伤组织分化的基本培养基是MS ;6 -BA、ZT和KT均能诱导愈伤组织分化不定芽 ,其中以 6 -BA的效果较好和经济 ;在所试的 6 -BA质量浓度中 ,以 3mg·L- 1的效果较佳 ;添加 80 0mg·L- 1的CH有利于火炬姜愈伤组织的分化 ;生根培养阶段 ,以附加w =0 .15 %的活性炭的 1/ 2MS培养基效果较好 ,生根率达 10 0 % ,且植株生长健壮 ;试管苗移栽在表土上 ,成活率可达 10 0 %     

垂盆草组织培养及无性系建立的研究

本研究以垂盆草的嫩茎为材料,进行了愈伤组织诱导、愈伤组织分化、不定芽生根、试管苗生根继代培养进行了研究,建立起垂盆草的无性系。结果证明：MS＋BA0.2mg·L-1＋NAA0.1mg·L-1＋GA30.5mg·L-1是诱导嫩茎形成具有分化能力愈伤组织的理想培养基;1/2MS＋BA0.6mg·L-1＋NAA0.1mg·L-1＋GA30.5mg·L-1是诱导愈伤组织分化和不定芽分化的理想培养基;1/2MSmg·L-1＋I-AA0.3mg·L-1＋NAA0.1mg·L-1是试管苗生根培养的理想培养基;河沙是试管苗移栽的理想基质。移植的试管苗具有长势旺盛整齐、根系增加1倍左右、耐干旱等特点。     

甘蔗组织培养中培养基的优化

比较了不同基本培养基 ,不同激素及其不同质量浓度的组合对甘蔗愈伤组织的诱导 ,不定芽的分化及其生根的效果 .结果表明 :MS + 2 ,4 -D 1～ 5mg·L-1培养基均可诱导愈伤组织的增殖 ;MS +KT 1.5～ 2 .0mg·L-1+ 6 -BA 2mg·L-1培养基对愈伤组织分化不定芽的效果最佳 ;1 2MS +NAA 1～ 4mg·L-1培养基对生根较好 .     

益母草愈伤组织分化及无性系建立的研究

以益母草根颈为材料,进行了愈伤组织诱导、增殖与分化,分化芽生根,试管苗移栽、定植的研究.结果表明：MS＋6-BA 0.5mg·L-1＋NAA 0.6mg·L-1＋2,4-D1.2mg·L-1是愈伤组织诱导培养的理想培养基;MS＋6-BA0.5mg·L-1＋NAA0.1mg·L-1＋2,4-D 1.5mg·L-1是愈伤组织继代增殖培养的理想培养基;1/2MS＋6-BA 0.2mg·L-1＋NAA 0.1mg·L-1是愈伤组织分化培养和分化芽继代分化增殖培养的理想培养基;N6＋IAA0.2mg·L-1培养基是益母草分化芽生根培养的理想培养基.移栽成活率为94.4%;定植成活率为99.1%;定植成活的试管苗保持野生益母草的所有植物学性状.     

红阳猕猴桃叶片再生体系的建立

文章以红阳猕猴桃组培苗的叶片为外植体,研究了不同植物生长调节剂对愈伤组织的诱导、不定芽的分化及生根的影响。结果表明,MS+0.5mg/L ZT(玉米素)+0.5mg/L 2,4-D(2,4-二氯苯氧乙酸)诱导产生淡黄色疏松的愈伤组织,MS+3.0mg/L 6-BA(6-苄基腺嘌呤)+1.0mg/L NAA(萘乙酸)诱导产生绿色致密的愈伤组织,愈伤组织诱导率均为100%。在MS+5.0mg/L 6-BA+0.5mg/L NAA培养基上愈伤组织的不定芽分化率达到100%。在1/2 MS+1.2mg/L IBA(吲哚丁酸)培养基上不定芽生根率为83.3%。     

裂叶秋海棠的离体快速繁殖

利用野生裂叶秋海棠叶片及叶柄培养，通过两种方式获得大量再生植株。(1)直接从外植体表面诱导出不定芽，最佳诱导培养基为MS 6-BA 3mg／L，不定芽在培养基MS NAA0．5mg／L 6-BA0．5mg／L增殖成丛生芽．(2)先诱导出愈伤组织，再由愈伤组织分化出大量不定芽．最佳愈伤组织诱导培养基为MS NAA0．5mg／L 2，4-D0．5mg／L 6-BA0．5mg／L,愈伤组织不定芽分化培养基为MS 6-BA 1mg／L,试管苗在含1／5MS无机盐的培养基上生根，之后移栽成活率达85％。     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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