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黑山晋枣芽培养及值株再生研究 总被引:4,自引:0,他引:4
以珍稀、优质黑山晋枣液芽为外植体建立了原种无性繁殖系。继代繁殖培养基(mg/L):MS+BA0.1+IAA0.1和MS+BA0.1+IBA0.5,培养30d平均苗高3.0-3.3cm,芽繁殖系数3.3-3.5;生根培养基为MS+IAA0.1+IBA0.2及MS+IAA0.2+IBA0.2两种,生根率83.3%,培养40d平均具根苗高达4.99cm,一次成苗,简化程序,缩短成苗期。移载成活率83.0 相似文献
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香石竹的叶片培养及植株再生 总被引:14,自引:0,他引:14
1植物名称香石竹(Dianthuscaryophy-llus),别名康乃馨。2材料类别无菌苗叶片。3培养条件以MS为基本培养基。分化培养基附加:(1)6-BA1.0mp·L-1(单位下同)+NAA0.3;(2)6-BA1.0+NAA0.1;(3)6-BA1.0+NAA0.05。增殖培养基附加6-BA0.5+NAA0.1。分化和增殖培养基均加蔗糖3%、琼脂0.7%,pH5.8。生根培养基为1/2MS附加NAA0.1,蔗糖2%,琼脂0.6%,pH5.8。培养温度为(25±1)℃,光照12h·d-1,… 相似文献
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哑特猕猴桃微繁工艺流程的研究 总被引:5,自引:0,他引:5
选用哑特猕猴桃腋芽为外植体。在不同发育阶段适宜培养基组成:芽增殖生长培养基为MS+6-BA0.5mg/L+IAA0.1mg/L(或者IBA0.1mg/L;NAA0.1mg/L),其在苗基部呈辐射状萌发多个嫩枝与主茎伸长生长同步进行的繁殖特点,有利提高繁殖率。40d繁殖系数为5-7。诱导生根培养基为MS+IBA0.5mg/L+IAA0.2mg/L,生根率达97.1%,培养30d,平均苗高3.5cm, 相似文献
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玉香梨的组织培养与快速繁殖 总被引:18,自引:0,他引:18
1植物名称沙梨品种玉香梨(Pyruspyrifolia cv. yuxiang)。2材料类别侧芽。3培养条件(1)丛芽诱导培养基:1/2MS大量元素+MS微量元素+铁盐+有机成分+6-BA2mg·L-1(单位下同)+NAA0.2+GA32+3%蔗糖+0.8%琼脂,固体培养;(2)增殖培养基:1/2MS+BA1.5+NAA0.2+GA31+3%蔗糖+0.8%琼脂,固体培养;(3)生根培养基:1/2MS+IBA10+1.5%蔗糖+0.6%琼脂,固体培养8d后转入不含任何激素的同类培养基中的二步生根法… 相似文献
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本文报道了[B1~Ala,B2-Ala]-胰岛素与人胎盘细胞膜胰岛素受体结合的特性和体外生物活力,并与胰岛素进行比较。在37℃和杆菌肽存在下,125I-[B1-Ala,B2-Ala]-胰岛素和125I-胰岛素与人胎盘细胞膜作用依赖于反应时间,反应6分钟到达平衡,此时,[B1-Ala,B2-Ala]-胰岛素和胰岛素与胰岛素受体的最大结合分别为每毫克膜蛋白结合6.44fmol和3.47fmol:达到平衡一半所需时间(T1/2)分别为19秒和25秒。用125I-[B1-Ala,B2-Ala]-胰岛素作为放射配体进行竞争性结合研究,从IC(50)得[B1-Ala,B2-Ala]胰岛素的受体结合活力为胰岛素的139.6%。Scatohard分析求得;[B1-Ala,B2-Ala]-胰岛素与高亲和和低亲和结合位点的结合常数在4℃时分别为5.88×108L/mol和7.63×105L/mol,而胰岛素分别为4.83×108L/mol和3.39×105L/mol。促脂肪细胞生成脂的实验表明:[B1-Ala,B2-Ala]-胰岛素的活力为胰岛素的130%。 相似文献
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香椿的组织培养和玻璃苗的防止 总被引:2,自引:0,他引:2
1植物名称香椿(Toonasinensis)。2材料类别(1)种子发芽3~5d后的下胚轴及带少许下胚轴的子叶;(2)当年生半木质化的腋芽茎段。3培养条件芽诱导及增殖培养,以MS为基本培养基,蔗糖30g·L~(-1),琼脂0.5%,附加激素(单位mg·L~(-1)):(1)6-BA0.2;(2)6-BA0.2、GA_32.0;(3)IAA0.1、6BA0.2;(4)ZT0.2、GA_32.0。诱导生根培养基为1/ZMS或仅含MS有机质(铁盐减半),附加1.0mg·L~(-1)IBA、15g·L~(-1)… 相似文献
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冬瓜的组织培养及快速繁殖 总被引:3,自引:0,他引:3
1植物名称台湾冬瓜(Benincasahispida)。2材料类别顶芽、带腋芽的茎段。3培养条件(1)预培养的培养基:1/2MS和1/2MS分别添加0.1、0.5、1.0mp·L~(-1)(单位下同)NAA、6-BA、ZT、2,4-D。(2)诱导丛生芽培养基:①MS+NAAI+6-BA4;②MS+NAA2+6-BA3;③MS+NAA3+6-BA2;④MS+NAA4+6.BA1。(3)生根培养基:⑤1/2大量元素减半的MS培养基;⑥1/2MS;⑦MS。培养温度:25~28℃,光照度2000~250… 相似文献
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以1/2MS+BA1mg;^-1)+NAA(1mgL^-1)+La^3+(10mgL^-1)培养墨兰根状茎30d后,取样观察根状茎细胞叶绿体,线粒体和细胞核的发育特点并与对照进行了比较。 相似文献
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专一识别脱落酸甲酯的单克隆抗体的制备与应用 总被引:2,自引:0,他引:2
专一识别2-顺(S)ABA甲酯的单克隆抗体来源于以ABA分子中的1-COOH为偶联位点合成的免疫原。它与游离态ABA和结合态ABA葡萄糖酯的交叉反应仅分别为1%与3.5%,而与ABA类似物,如2-顺-黄质醛、紫黄质以及ABA的2-反式异构体和(R)-对映体则无交叉反应。利用该抗体建立的高度灵敏和精确的ABAme酶联免疫测定法,其检测线性范围为0.048~1.52pmol。通过ABAmeELISA和GA1+3ELISA分析可知羊蹄叶片衰老与内源GA1+3/ABA比值的下降有关。 相似文献
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Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis
It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis. 相似文献
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RICHARD E. NORRIS 《Botanical journal of the Linnean Society. Linnean Society of London》1991,106(1):1-40
Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera. 相似文献
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JOAN VALUÈS MONTSERRAT TORRELL NÚRIA GARCIA JACAS 《Botanical journal of the Linnean Society. Linnean Society of London》2001,137(4):399-407
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted. 相似文献
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肝癌中HBV和HCV基因和抗原的分布及意义 总被引:1,自引:0,他引:1
采用原位分子杂交方法检测HCV
RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV
RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV
RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV
X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV
C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细 相似文献
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H.-R. GREGORIUS 《Biological journal of the Linnean Society. Linnean Society of London》1984,23(2-3):157-165
For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment. 相似文献
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment. 相似文献