曼地亚红豆杉愈伤组织诱导和继代培养研究

以曼地亚红豆杉(Taxusmedia var.hickss)嫩茎和嫩叶为外植体,进行愈伤组织诱导和继代培养研究。愈伤组织诱导以MS为基本培养基,继代培养以MS和B5为基本培养基,分别添加不同浓度和组合的细胞分裂素(6-BA、TDZ、KT、2-ip)、生长素类激素(NAA、2,4-D),和水解乳蛋白、活性碳等抗褐化试剂,考察其对愈伤组织诱导和继代培养的影响。结果表明,曼地亚红豆杉嫩茎有很强的分生能力,比嫩叶更易于诱导愈伤;在培养基MS TDZ0.002mg/L NAA1.0mg/L、MS TDZ0.002mg/L 2,4-D1.0mg/L、MS TDZ0.002mg/L NAA1.0mg/L 2,4-D1.0mg/L和MS KT1.0mg/L 2,4-D1.0mg/L NAA1.0mg/L上,嫩茎愈伤的诱导率达100%,生长迅速,品质良好,利于继代培养;培养基B5 KT1.0mg/L 2,4-D2.0mg/L NAA1.0mg/L适用于愈伤继代,每30d增殖倍数5.2倍;培养基中添加活性碳500mg/L、维生素C 1000mg/L或水解乳蛋白1000mg/L对抑制材料褐化有一定的效果。     

两种补血草属植物愈伤组织诱导的比较

以黄花补血草和大叶补血草无菌苗叶片为外植体,采用不同激素配比诱导愈伤组织,并分化获得不定芽,以建立两种补血草无性系,为植株快繁和细胞悬浮培养提供理论依据.结果表明:以补血草无菌苗叶片为外植体进行愈伤组织诱导和分化,可实现补血草快速繁殖,黄花补血草愈伤组织的诱导和分化较大叶补血草的容易.黄花补血草最适愈伤组织诱导培养基为MS 6-BA(0.3～0.5 mg/L) NAA(1.0～2.0 mg/L),最适分化培养基为MS 6-BA(0.3～1.0 mg/L) NAA(0.5～1.0mg/L);大叶补血草最适愈伤组织诱导培养基为MS 6-BA(0.3～0.5 mg/L) NAA 2.0 mg/L,最适分化培养基为MS 6-BA 1.0 mg/L NAA 0.5 mg/L.     

正交设计法在川黄柏组织培养中的应用

用正交试验法探索了4种外源激素对川黄柏叶片诱导愈伤组织的影响,结果显示诱导川黄柏叶片愈伤组织产生的最佳培养基配方是:MS+6BA1.0mg/L+2,4D1.0mg/L+IAA0.3mg/L     

不同激素对蜡梅Chimonanthus praecox愈伤组织诱导的影响

本实验研究了6-BA、2,4-D、IAA、NAA、IBA、KT对蜡梅Chimonanthus praecox愈伤组织诱导的影响,以及探索愈伤组织诱导的最适培养基配方.激素筛选实验结果表明2,4-D能诱导蜡梅分化出愈伤组织.在2,4-D浓度梯度实验中,设计了0、0.1、0.25、0.5、1.0、1.5、2.0 mg/L 7个浓度,结果表明浓度为0.25~1.0 mg/L的2,4-D诱导愈伤组织的效果最好.在6-BA浓度梯度实验中,也设计了0、0.1、0.25、0.5、1.0、1.5、2.0 mg/L 7个浓度,均未诱导出愈伤组织,表明6-BA不能单独诱导出蜡梅愈伤组织.以葡萄糖、6-BA和2,4-D三因素组合正交实验共设置了25个组合,得到诱导蜡梅愈伤组织的最适培养基配方为:1%葡萄糖+0.25 mg/L2,4-D+1.5 mg/L6-BA.     

薄荷愈伤组织诱导与分化研究

本文研究了薄荷愈伤组织诱导与分化的影响因素。以薄荷茎段为外植体,研究培养基、激素水平对愈伤组织诱导、增殖培养的影响;以叶片为外植体,探讨叶片的愈伤组织诱导;以茎段、叶片和叶柄为外植体材料,比较不同外植体的愈伤组织诱导率。实验结果表明:MS比1/2 MS、B5培养基更适于茎段的诱导培养,诱导率达80%;叶片愈伤组织的诱导率为100%,以MS+1.0 mg/L BA+0.1 mg/L KT+0.5 mg/L NAA为最佳诱导培养基;幼叶是不同外植体中诱导效果最好的,以MS+0.5 mg/L BA+0.1 mg/L NAA为最佳诱导培养基。     

甘肃康县地方茶树愈伤组织诱导研究

以康县地方茶树的茎、叶为外植体诱导愈伤组织,比较了不同激素组合对茎、叶诱导愈伤组织的影响。结果表明,以幼叶和幼茎作为外植体能获得较多的愈伤组织;幼叶外植体的适宜培养基为MS+6-BA 1.5 mg/L+NAA 0.5 mg/L+KT 1.0 mg/L,幼茎外植体的适宜培养基为6-BA 0.5 mg/L+NAA 1.0 mg/L+2,4-D 2.0 mg/L。     

珙桐叶片的脱分化和分化诱导研究

研究了以濒危植物珙桐叶片作为外植体诱导愈伤组织及分化再生植株.结果表明:本实验中,诱导愈伤组织的最佳培养基为1/2MS+2.0 mg/L IBA+1.0 mg/L 6-BA;愈伤组织继代的最佳培养基为1/2MS+3.0 mg/L IBA+1.5 mg/L 6-BA最佳分化培养基为MS+2.0mg/L 6-BA+1.0 mg/L IBA+0.2 mg/L GA_3,芽分化率为6.2%;生根最佳培养基为1/2MS+0.4 mg/L IBA,生根率为60%.     

垂柳的组织培养及植株再生体系研究

对垂柳愈伤组织和植株再生体系进行了研究,结果显示茎段比较适合诱导愈伤组织,质量浓度为1.0mg/L和2.0mg/L的6-BA均能诱导垂柳茎段愈伤组织;MS+6-BA 1.0 mg/L+NAA 0.1 mg/L+KT 0.5 mg/L的激素配比最为适合胚状体和芽的分化;MS+6-BA 1.0 mg/L+Ac 0.3%培养基能促使垂柳根的形成,且能促使芽生长,最终形成幼苗。     

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.     

水苏无性系技术建立的研究

以水苏根茎为材料,进行了愈伤组织的诱导和分化、试管苗的生根、移栽和定植的研究,建立起水苏无性系技术.结果证明:MS+BA 0.5 mg/L+2,4-D 1.0～2.0 mg/L是愈伤组织诱导培养的理想培养基;MS+BA 0.5mg/L+2,4-D1.5mm/L是愈伤组织继代培养的理想培养基;MS+BA 0.5 mg/L...     

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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