白芨高效再生体系建立及工厂化育苗技术研究

以白芨种子为外植体,1/2MS或MS为基本培养基,通过添加不同浓度配比的植物生长调节剂,筛选最适合原球茎的诱导、芽的增殖与分化以及生根培养的条件。最适宜白芨原球茎诱导的培养基为1/2MS+1.5 mg/L 6-BA+1.0 mg/L NAA;原球茎的芽增殖的最适培养基为MS+0.5 mg/L 6-BA+0.1 mg/L NAA,增殖倍数达6.6;最佳分化培养基为MS+0.5 mg/L 6-BA+0.3 mg/L NAA+50.0 g/L土豆泥;最佳生根培养基为1/2 MS+0.5 mg/L NAA+70.0 g/L香蕉泥,生根率达100%;炼苗基质配方以黄土∶腐植土∶锯木粉按体积比4∶4∶2,白芨苗移栽成活率高。以白芨种子诱导原球茎获得的高效再生技术体系可以在白芨产业化发展中推广应用。     

南川百合组织培养与快繁技术体系研究

为加快南川百合的繁殖速度,对南川百合进行离体组织培养研究,结果表明:南川百合外植体的诱导率从大到小依次为:鳞片,花丝,子房,茎段,叶片.用鳞片作为外植体时,下部的诱导率最高,中部次之,上部最差.鳞片诱导丛生苗的最佳培养基为MS+6-BA 1.5mg/L+NAA 0.5mg/L;用花丝和子房作为外植体时,诱导丛生苗的最佳培养基为MS+6-BA 0.5mg/L+NAA 0.5mg/L;用再生苗的叶片作为外植体时,诱导丛生苗的最佳培养基为MS+6-BA 1.0mg/L+NAA 0.5mg/L;用再生苗的茎段作为外植体时,诱导丛生苗的最佳培养基为MS+6-BA 1.5mg/L+NAA 1.0mg/L.用于不定芽增殖的最佳培养基为MS+6-BA 1.0mg/L+NAA0.05mg/L.无根苗生根的最佳培养基为1/2MS+NAA 0.5mg/L,生根率可达到86.7%,移栽后成活率很高.     

细茎石斛组织培养研究

以细茎石斛(Dendrobium moniliforme(L)sw.)的种子进行离体培养,获得无菌苗.截取无菌苗的茎段作为外植体,进行组织培养.结果表明:最适宜诱导细茎石斛原球茎生成的培养为MS 0.5 mg/L6-BA 2 mg/L NAA 10%CM;最适宜细茎石斛原球茎增殖及幼苗分化的培养基为MS 4 mg/L6-BA 1 mg/L KT 1 mg/L NAA 10%马铃薯浸汁;最适宜细茎石斛壮苗生根的培养基为MS 2 mg/L NAA 10%香蕉汁;最适宜细茎石斛瓶苗移栽的基质为纯苔藓.     

黄芩愈伤组织与丛芽诱导

为寻求黄芩愈伤组织、丛芽诱导的最佳条件,分别以茎尖、茎段、叶片、带节茎段等为实验材料比较不同诱导条件对诱导率的影响;比较培养过程中愈伤组织的增重量及生长状态.结果表明,诱导率:带节茎段要高于其它外植体;MS+6-BA0.5 mg/L +NAA0.5 mg/L为愈伤组织诱导率最高、愈伤组织增殖最大的培养基组合;MS+6-BA1.0 mg/L +NAA0.5 mg/L为不定芽诱导最合适培养基.     

两个菊花品种再生体系的建立

以小菊品种56号和大菊品种28号无菌苗的幼嫩叶片和茎段为材料,通过器官分化或器官直接发生途径,建立了两个品种的再生体系.以MS为基本培养基添加不同质量分数的6-BA和NAA,通过一定时间诱导,幼嫩叶片和茎段可以通过不同方式产生不定芽.初步结果表明,适合56号茎段愈伤生长并诱导不定芽产生的培养基为:MS 6-BA 0.5mg/L NAA 0.05mg/L;适合28号茎段愈伤生长并诱导不定芽的培养基为:MS 6-BA 0.5mg/L NAA 0.1mg/L;56号叶片直接诱导不定芽的培养基为:MS 6-BA1-3mg/L NAA 0.1-0.5mg/L.     

6-BA与NAA不同浓度配比对大花蕙兰原球茎诱导的影响

以大花蕙兰茎尖为外植体,研究6-BA与NAA浓度梯度配比对大花蕙兰原球茎的诱导、增殖及分化的影响.结果表明:6-BA 1.0mg/L+NAA 0.5mg/L浓度配比下,大花蕙兰茎尖存活率达到93.3%;6-BA0.8mg/L+NAA 0.4mg/L浓度配比下,原球茎诱导率达到85.8%;6-BA 1.0mg/L+NAA 0.3mg/L浓度配比下,原球茎增殖系数达到4.59;6-BA 0.8mg/L+NAA 0.5mg/L浓度配比下,原球茎出芽率达到87.5%.首次报道采用6-BA 0.8mg/L+NAA 0.5mg/L浓度配比组合适合大花蕙兰茎尖培养,可同时获得较高的原球茎诱导率(80.8%)和出芽率(87.5%),比目前已报道的最佳原球茎诱导率(72.7%)和出芽率(76.7%)提高8%以上.     

小叶锦鸡儿的组织培养

小叶锦鸡儿是一种抗旱性强的落叶灌木,在防风固沙和水土保持方面功能显著。为了探索其组培扩繁的可行性,以茎段和无菌苗为外植体对小叶锦鸡儿进行了离体培养的初步研究。结果表明:相比于二年生木质化茎段,当年生未木质化的带节茎段具有更强的腋芽发生能力,在MS+0.5mg/L 6-BA+0.01mg/L IAA培养基上腋芽诱导率可以达到31.54%;无菌苗的子叶、真叶、茎段和下胚轴均有强的愈伤组织发生能力,在MS+2.0mg/L NAA+0.5mg/L 6-BA培养基上愈伤组织诱导率均达到或接近100%,适合愈伤组织分化的培养基组合为MS+2.0mg/L NAA+0.5mg/L 6-BA;无菌苗的带节茎段通过腋芽发生途径可以实现植株再生,芽丛诱导适合的培养基组合为MS+2.0mg/L NAA+0.5mg/L 6-BA,在1/8MS+0.5mg/L NAA+0.5mg/L IBA培养基上诱导了不定根的发生。     

大花蕙兰离体培养和快速繁殖技术的研究

以大花蕙兰茎尖作为外植体进行了组织培养繁殖技术的研究。结果显示:茎尖诱导芽的出苗整齐。适宜诱导增值的培养基为MS 6-BA1.0mg/L NAA0.1mg/L 0.6g/L活性炭,原球茎诱导率达85%。分化培养基为MS 6-BA1.5mg/L NAA0.5mg/L 活性炭0.6g/L,分化率74%。生根培养基1/2MS NAA1.0mg/L 多效唑0.2mg/L 蔗糖20g/L,琼脂5g/L固化培养,生根率98%。     

大叶醉鱼草快繁技术初探

以庐山野生植物大叶醉鱼草的茎段为材料,对芽、丛生芽及生根培养方面进行了初步的研究.结果表明:MS+6-BA 0.5 mg/L+NAA 0 mg/L的培养基适宜诱导醉鱼草茎段芽和丛生芽生长,MS+NAA 0.2 mg/L的培养基适宜醉鱼草茎段生根.     

中间锦鸡儿组织培养体系的建立

以中间锦鸡儿茎段为外植体,建立了它的组织培养体系,具体条件如下:愈伤组织诱导培养基为MS+GA30.15mg/L+6-BA 0.2mg/L+NAA 0.4mg/L+AC 0.1g/L+蔗糖25g/L+琼脂6g/L,愈伤诱导率达33.33%;丛生芽诱导培养基为MS+6-BA 1.0mg/L+NAA 0.2mg/L+蔗糖25g/L+琼脂6g/L,诱导率为13.33%;诱导生根培养基为MS+IAA 0.5mg/L+GA30.15mg/L+蔗糖20g/L+琼脂6g/L,生根率达60%;将生根幼苗移至蛭石和营养土体积比为2∶1的基质中,移栽成活率高达100%.     

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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