黄金梨的组织培养和快速繁殖

1 植物名称砂梨品种黄金梨(Pyrus pyrifolia cv. Whangkumbe). 　　2 材料类别茎尖. 　　3 培养条件诱导培养基:(1)1/3MS 6-BA 1.0 mg*L-1 (单位下同) IBA 0.2,(2)MS IBA 0.2 6-BA 0.5、1.0、1.5、2.0、3.0;增殖继代培养基:(3)MS 6-BA 1.0 IBA 0.2,(4)MS 6-BA 1.5 IBA 0.3;生根培养基:(5)1/2MS IBA 0.5 NAA 0.5,(6)1/2MS IBA 1.0 NAA 1.0,(7)ASH IBA 0.5 NAA 0.5,(8)ASH IBA 1.0 NAA 1.0. 生根培养条件分为暗培养与正常培养;7 d后转入无激素培养基,以加含激素的为对照;附加0.5 g活性炭,以不加活性炭的为对照.上述诱导、增殖培养基附加30 g*L-1蔗糖,生根培养基附加20 g*L-1蔗糖,琼脂浓度均为8 g*L-1,pH 5.8.培养温度25～28℃,光照度1 600～2 000 lx,每天光照12 h. ……     

甜樱桃(Prunus avium)矮化砧木ZY-1休眠枝条的芽

(1)从生芽诱导培养基:MS 6-BA1.0 mg·L-1(2)增殖培养基:MS 6-BA 1.5 IAA 1.0 GA0.5;(3)壮苗培养基:MS IAA 1.2.     

迷迭香的离体培养(摘编)

培养条件 　　(1)愈伤组织诱导培养基:MS＋6-BA 1.0 mg*L－1(单位下同)＋IAA 0.025＋NAA 0.1;(2)增殖培养基：MS 6-BA 0.5;(3)分化培养基:MS 6-BA 3.0＋IAA 1.0;(4)茎尖直接诱导丛生芽培养基: MS 6-BA 0.8 IAA 0.2;(5)伸长培养基:MS 6-BA 1.0＋IAA 0.2;(6)生根培养基:MS IBA 0.25. 　　……     

GA3、6-BA对金钗石斛生长发育及生物碱含量的影响

在金钗石斛(Dendrobium nobile Lindl.)高分蘖期前用GA3和6-BA进行浸根处理,分析GA3和6-BA对金钗石斛生长发育及生物碱含量的影响.结果表明:GA3、6-BA处理使金钗石斛SOD、POD活性升高,可溶性蛋白质和可溶性糖含量增加; 用0.5～1.0mg·L-1GA3和10 mg·L-16-BA处理可使金钗石斛的总生物碱含量分别增加6.7%～10.1%和3.4%;石斛碱的含量不受GA3和6-BA的影响.0.5～1.0 mg·L-1 GA3和10～50 mg·L-1 6-BA处理可使金钗石斛生物产量分别增加13.3%～30.7%和17.3%～40.0%,有效分蘖率提高63.2%～68.9%和63.1%～82.1%,GA3可显著促进茎的延长生长.内源IAA含量在5-8月份较高,其中以6月份含量最高(4.84 μg·g-1),1月份最低(2.97 μg·g-1);内源ABA含量在1月份达最高(0.61 μg·g-1).用含有1.0 mg·L-1 GA3和50 mg·L-1 6-BA的激素营养液处理可以显著提高金钗石斛生物产量(比CK增产38%),而且总生物碱含量也增加5.6%.     

白花蛇舌草的组织培养和植株再生

1 植物名称白花蛇舌草(Hedyotis diffusa). 2 材料类别带顶芽或腋芽的茎段,取自本校花圃. 3 培养条件诱导培养基:(1)MS+NAA 0.2 mg*L-1(单位下同)+6-BA 2.0;(2)MS+NAA 0.5+6-BA 2.0;(3)MS+NAA 1.0+6-BA 2.0;(4)MS+NAA 2.0+6-BA 2.0;(5)MS+NAA 2.0+6-BA 1.0;(6)MS+NAA 2.0+6-BA 0.5;(7)MS+NAA 2.0+6-BA 0.2.丛生芽增殖培养基:(8)MS+6-BA 3.0+NAA 0.1.壮苗培养基:(9)MS+6-BA 2.0+IBA 0.5.生根培养基(10)1/2MS+NAA 0.5.以上培养基均附加蔗糖30 g*L-1,琼脂7 g *L-1,pH 5.8,培养温度(25±2)℃,光照12 h*d-1,光照度1 500～2 000 lx.     

三尖杉的离体胚培养

1植物名称三尖杉(Cephalotaxus fortunei Hook.f.)。2材料类别离体胚。3培养条件芽诱导培养基:MS 6-BA2.0mg·L-1(单位下同) IAA1.0 NAA0.1;芽增殖培养基:MS 6-BA2.0 IAA1.0 NAA1.0;生根培养基:1/2MS IBA1.0 NAA0.5 KT0.2。以上各培养基     

水杉愈伤组织诱导及植株再生

通过愈伤组织诱导器官发生途径,建立了水杉（Metasequoia glyptostroboides）的植株再生体系,探讨了不同外植体（种胚、幼叶切块、茎段、根段）和植物生长调节剂对不定芽直接再生和愈伤组织诱导器官发生的影响。结果表明：以种胚、无菌苗叶片、茎段和根作为外植体,在MS补加2,4-D、NAA和6-BA不同组合的培养基上都能诱导得到愈伤组织,其中种胚诱导愈伤组织效果最好,诱导率可达100%,茎诱导效果次之,诱导率为97.1%。诱导愈伤组织效果较好的培养基有：MS＋1.0mg·L-12,4-D＋0.5mg·L-16-BA、MS＋0.1mg·L-16-BA＋1.0mg·L-1NAA、MS＋0.5mg·L-16-BA＋1.0mg·L-1NAA、MS＋1.0mg·L-16-BA＋1.0mg·L-1NAA、MS＋0.5mg·L-16-BA＋2.0mg·L-1NAA、MS＋1.0mg·L-16-BA＋2.0mg·L-1NAA和MS＋0.5mg·L-12,4-D＋0.5mg·L-1NAA。以愈伤组织在MS培养基上植株再生效果最好,再生率为62.5%。     

滇大头茶的组织培养和微型繁殖

1植物名称滇大头茶(Gordonia yunnanensis). 2材料类别嫩梢的尖茎和茎节切段. 3培养条件(1)芽萌动和生长培养基:MS 6-BA 1.0mg·L-1(单位下同) IAA 0.5;(2)多芽体诱导培养基:MS 6-BA 3.0 IAA 0.5;(3)壮苗培养基:MS ZT1.0～2.0 IAA 0.5或MS 10%椰子汁(CM) IAA 0.5;(4)生根培养基:1/2ER IBA 0.5;(5)纸桥生根培养液:1/2ER,用IBA0.5～1.0g·L-1浸芽条基部20min,将芽条接种滤纸桥上,然后置弱光(200 lx)下培养.培养基添加3%(生根用2%)蔗糖和0.6%琼脂,pH5.6.培养温度25～27℃,夜间18～22℃,光照时间14h·d-1,光照度1 500 lx.     

彩萼石楠的组织培养和快速繁殖

1植物名称彩萼石楠或帚石南(Calluna vulgaris). 2材料类别当年生新梢. 3培养条件基本培养基为MS.(1)诱导芽培养基:MS 6-BA 0.5～2.0 mg·L-1(单位下同) NAA 0.05;(2)增殖培养基:MS 6-BA 1.0～2.0 IAA 0.2 GA 0.5;(3)生根培养基:1/2MS IBA 0.5～1.0.以上培养基均附加30 g·L-1蔗糖、6 g·L-1琼脂,pH 5.4～5.8.光照度为1 000～2 500 lx,光照时间12 h·d-1;培养温度为(25±1)℃.     

地灵的组织培养与快速繁殖

1植物名称地灵(Stachys floridana),又称银条. 2材料类别根茎和茎段. 3培养条件(1)起始培养基:MB 6-BA 1.0mg·L-1(单位下同) KT 1.0 NAA 0.5;(2)不定芽诱导培养基:MB 6-BA 1.0 KT 1.5;(3)分化培养基:MB IAA 1.0 KT 0.5;(4)生根培养基:1/2MB 6-BA 1.0 NAA 2.0.上述培养基中均添加3%蔗糖、0.55%琼脂,pH 5.6.培养温度25～28℃,光照12～14 h·d-1,光照度2 000～3 0001x.     

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.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

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.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

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.     

肝癌中HBV和HCV基因和抗原的分布及意义

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     

Selection with two alleles and complete dominance

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.