红三叶和白三叶愈伤组织的诱导和胚性细胞悬浮系的建立

以红三叶（Ｔｒｉｆｏｌｉｕｍｐｒａｔｅｎｓｅ）野生品种巴东红三叶的叶片为外植体,在ＭＢ－１至ＭＢ－９的固体培养基上诱导愈伤组织,筛选出最佳培养基是ＭＢ－９培养基．以白三叶（Ｔｒｉｆｏｌｉｕｍｒｅｐｅｎｓｅ）裁培品种“路易斯安娜”和“Ｈｕｃａ”的叶片为外植体,接种在ＭＢ－９固体培养基上诱导愈伤组织．愈伤组织形成以后,均在ＭＢ－９固体培养上继代培养３～４次后,获得胚性愈伤组织,然后转至ＭＢ＋３ｍｇ／Ｌ２,４－Ｄ＋０７ｍｇ／ＬＢＡ＋０２ｍｇ／ＬＮＡＡ＋２ｍｇ／Ｌ甘氨酸＋５００ｍｇ／ＬＣＨ＋３％蔗糖的液体培养基中,经强化培养,２个月后,获得胚性细胞悬浮系．实验结果表明,缩短换液时间,即每隔３～４ｄ换一次,可加快胚性细胞悬浮系的建立．     

茴香原生质体培养研究

以茴香（ＦｏｅｎｉｃｕｌｕｍｖｕｌｇａｒｅＬ．）幼苗茎切段在ＭＳ附近２，４－Ｄ１ｍｇ／Ｌ、６－ＢＡ０．５ｍｇ／Ｌ的培养基上诱导产生愈伤组织，经４～５次继代后形成胚性愈伤组织。将胚性愈伤组织转至ＭＳ＋ＮＡＡ１ｍｇ／Ｌ＋２，４－Ｄ０．５ｍｇ／Ｌ＋６－ＢＡ０．２５ｍｇ／Ｌ的液体培养基中培养，形成胚性细胞悬浮系。悬浮细胞在含有１．５％纤维素酶、１％果胶酶、０．５％蜗牛酶的混合酶液中酶解得到大量的原生质体，原生质体用修改的ＫＭ８Ｐ培养基中做液体浅层培养。２天后细胞发生一裂，两个月后形成０．５～１ｍｍ大小的小愈伤组织，转入含琼脂糖的固体培养基中３周后形成２～３ｍｍ的愈伤组织     

蛇床愈伤组织的形态发生及植株再生

蛇床幼茎外植体在ＭＳ＋２，４－Ｄ２ｍｇ／ｌ＋ＫＴ０．２ｍｇ／ｌ培养基上形成淡黄绿色松软状愈伤组织。愈伤组织在转入培养基ＭＳ＋ＮＡＡ０．２ｍｇ／ｌ＋２Ｔ０．８ｎｇ／ｌ以后分化出不定芽，在１／２ＭＳ＋ＩＡＡ２ｍｇ／ｌ培养基中可产生不定根，进而发育成为完整植株。愈伤组织在ＭＳ＋２，４－Ｄ０．２ｍｇ／ｌ＋ＺＴＺＴ０．４ｍｇ／ｌ培养基中继代３～４次以后，再转入ＭＳ＋ＮＡＡ０．２ｍｇ／ｌ＋ＺＴ０．８ｍｌ／ｌ培养基中继代１～２次，形成了大量胚状体。胚状体经过球形胚、心形胚、鱼雷胚和子叶胚最终发育成再生植株。器官发生和体细胞胚胎发生这两种形态发生方式在发生顺序、形态特征和所需激素条件等方面都是不同的。     

雪兔子叶的组织培养及植株再生

以雪兔子无菌苗的幼叶为外植体,接种到ＭＳ补加ＮＡＡ（１．０－２．０）ｍｇ／Ｌ、６－ＢＡ（０．１－１．０）ｍｇ／Ｌ的培养基上诱导愈伤组织,其中以ＭＳ＋ＮＡＡ２．０ｍｇ／Ｌ＋６－ＢＡ０．５ｍｇ／Ｌ的诱导效果最好,经６周培养即可形成大量的黄绿色愈伤组织,诱导率可达１００％,经２－３次继代培养后,将生长发良好的愈伤组织转接到ＭＳ附加６－ＢＡ（０．５－２．０）ｍｇ／Ｌ、ＩＡＡ（０．０５－０．１）ｍｇ／Ｌ、Ｎ     

水母雪莲愈伤组织的多态性及其再分化条件的研究

以水母雪莲（Ｓａｕｓｓｕｒｅａ ｍｅｄｕｓａ Ｍａｘｉｍ．）的幼叶外植体,接种ＭＳ补加０．２～０．４ｍｇ／ＬＮＡ、０．２～４。０ｍｇ／Ｌ ６－ＢＡ的不同组合的培养基上培养３周,即形成大量的原始愈伤组织,其中以ＭＳ＋２。０ｍｇ／Ｌ ＮＡＡ＋０．２ｍｇ／Ｌ ６－ＢＡ培养基上的诱导效果最好,诱导率可达１００％。水母雪莲原始愈伤组织呈多态性,经继代培养可分离出白色水状、淡黄绿色致密的各紫红色疏松的３种愈伤     

番木瓜体细胞胚发生及发育的影响因素

研究了影响番木瓜（Ｃａｒｉｃａｐａｐａｙａ）体细胞胚发生、发育的一些因素．结果表明：①番木瓜无菌小苗幼根在附加ＮＡＡ１．０ｍｇ／Ｌ＋ＫＴ０．５ｍｇ／Ｌ＋ＧＡ３０．５ｍｇ／Ｌ的改良ＭＳ培养基上可诱导出大量具良好胚性潜能的愈伤组织；②愈伤组织在附加ＮＡＡ０．２５ｍｇ／Ｌ＋ＫＴ０．２５ｍｇ／Ｌ的改良ＭＳ培养基上可连续继代并得到胚性化；③在所试验的激素种类中，ＫＴ是适于体细胞胚的发育，最适浓度为０．５ｍｇ／Ｌ；④０．１％～０．３％的活性炭有利于体胚的发生、发育；⑤体细胞胚在固体培养基上完成球形胚期前的发育，在液体培养液中完成球形胚期后的发育可提高成熟体胚的产量和质量     

荞麦组织培养中的植株再生

用荞麦无菌苗的幼茎和幼叶作外植体分别接种在ＭＳ补加不同激素组合的培养基上培养获得再生植株。实验结果表明,适宜诱导愈伤组织的激素组合为２．４－Ｄ４．０ｍｇ／Ｌ＋ＫＴ０．２ｍｇ／Ｌ,适宜愈伤组织生长的激素组合为２．４－Ｄ１．０ｍｇ／Ｌ＋ＫＴ１．０ｍｇ／Ｌ。诱导芽的较适宜的组合为６－ＢＡ３．０ｍｇ／Ｌ＋ＩＡＡ０．１ｍｇ／Ｌ,不定芽接种到含ＭＳ＋ＩＢＡ２．０ｍｇ／Ｌ＋ＫＴ０．１ｍｇ／Ｌ的ＭＳ培养基上就能生     

辣椒（Capsicum annuum L.）下胚轴离体培养的研究

将辣椒无菌苗下胚轴切段接种在ＭＳ培养基（附加不同的植物激素）上，诱导产生愈伤组织。最适的诱导培养基为ＭＳ＋２ｍｇ／Ｌ ＢＡ，０．５ｍｇ／Ｌ ＩＡＡ，在此培养基上产生的愈伤组织具有较强的分化能力。将愈伤组织转移到分化培养基，光照培养，芽分化率可达２５．０％。不定芽在含１ｍｇ／Ｌ ＧＡ３和２ｍｇ／Ｌ ＢＡ的ＭＳ培养基上伸长成苗，再移入生根培养基上诱导生根，长成完整植株。     

高蛋白籼稻品系H28胚培养力的初步研究

以籼稻Ｈ２８优良品系为材料，通过胚培养诱发愈伤组织并继代培养，最适的诱导培养基为ＭＳ＋２ｍｇ／Ｌ ２，４－Ｄ，在此培养基上产生的愈伤组织具有较强的分化能力，将愈伤组织转移到分化培养基，光照培养１７ｄ后，在ＭＳ＋０．２５ｍｇ／Ｌ ＮＡＡ＋１ｍｇ／Ｌ ＢＡ的分化培养基上，愈伤组织的芽分化率可达４０％。在分化培养基上培养１０ｄ后，将愈伤组织转移到无激素或低浓度激素的培养基上，其分化出苗率有明显的提高。     

玛丽安万年青的茎尖培养与快速繁殖

以玛丽这万年青（Ｄｉｅｆｆｅｎｂａｃｈｉｓ Ｔｒｏｐｉｃ Ｍａｒｉｎｎｅ）的顶芽或侧芽茎尖作外植体,通过二次表面灭菌,得到茎尖无菌培养物。根据茎尖愈伤组织诱导率和生长速度２项指标,筛选出码丽安万年青茎尖离体培养的培养基。ＭＳ＋ＢＡ４．０ｎｇ／Ｌ的固体培养基适宜于诱导茎尖形成愈伤组织和愈伤组织生长。愈伤组织转入ＭＳ＋ＢＡ２．０ｍｇ／Ｌ的固体培养基分化形成丛生芽,从愈伤组织上切取１ｃｍ以上的牙转入ＭＳ     

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.     

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     

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

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