蒙花忍冬的组织培养与快速繁殖研究

以金银花 蒙花 品系的茎段为外植体 ,于 MS和 B5附加不同激素配比的培养基上 ,探讨愈伤组织形成和丛生芽诱导及生根培养的条件 .诱导愈伤组织和丛生芽的培养基为 B5+BA2 .0 m g· L- 1 +KT0 .2～ 0 .5 mg· L- 1+IAA 0 .5～ 1 .0 mg· L- 1 +L H 1 0 0 0 m g· L- 1 ,继代增殖培养的培养基为 B5+BA 2 .0 m g· L- 1 +KT 0 .5 m g·L- 1 +IAA1 .0 m g· L- 1 +L H1 0 0 0 m g· L- 1和 B5+BA2 .0 mg· L- 1 +KT0 .36 m g· L- 1 +IAA1 .0 mg· L- 1+CH 1 0 0 0 m g· L- 1 +1 / 2 MS :大量元素 ,生根培养基为 1 / 2 MS +IBA 0 .2 mg· L- 1 +L H 1 0 0 0 mg·L- 1 .结果表明 L H和 CH在金银花愈伤组织和丛生芽诱导方面具明显的作用     

海州蒿组织培养和植株再生

1　植物名称　海州蒿 (Artemisiafauriei)。2　材料类别　茎尖。3　培养条件　愈伤组织诱导培养基 :(1)MS +6 BA1mg·L- 1(单位下同 ) +NAA 1;(2 )MS +6 BA 1+NAA 0 .5 ;(3)MS +6 BA 2 +NAA 0 .5。芽分化培养基 :(4 )MS +6 BA 1;(5 )MS +6 BA 2 ;(6 )MS +6 BA 5 +NAA 0 .1;(7)MS +6 BA 2 +NAA 0 .0 1。生根培养基 :(8) 1/2MS ;(9) 1/2MS +NAA 0 .1;(10 )MS。以上培养基中的蔗糖含量除生根培养基 (8)～(10 )为 2 0 g·L- 1外 ,其余均为 30 g·L- 1。pH 5 .8～6 .0。培养温度 (2 5± 1)℃ ,光照时间 14h·d- 1,…     

土人参茎尖培养和植株再生

1　植物名称　土人参 (Talinumpaniculatum)。2　材料类别　实生苗之茎尖 ,种子取自本校花圃。3　培养条件　种子萌发培养基 :( 1 ) 1 /2MS +0 .7%琼脂 + 2 %蔗糖。丛生芽诱导培养基 :( 2 )MS + 6 BA 0 .5mg·L- 1 (单位下同 ) ;( 3)MS +NAA0 .5 + 6 BA 2 .0 ;( 4 )MS +NAA 0 .5 +KT 2 .0 ;( 5 )MS+NAA 0 .5 + 6 BA 3.0。丛生芽增殖培养基 :( 6)MS + 6 BA 2 .0 ;( 7)MS +NAA 0 .0 5 + 6 BA 3.0。生根培养基 :( 8) 1 /2MS +NAA 2 .0。上述 ( 2 )～ ( 8)培养基均附加 30 g·L- 1 蔗糖、7g·L- 1 琼脂 ,pH 5 .8。培养室温…     

香叶天竺葵的组织培养和快速繁殖

1　植物名称　香叶天竺葵 (Pelargonium grave olens)。2　材料类别　无菌萌发的种子苗。3　培养条件　种子萌发培养基 :( 1 )MS。分化培养基 :( 2 )MS + 6 BA 0 .5mg·L- 1 (单位下同 ) ;( 3)MS + 6 BA 0 .5 +NAA 0 .1 ;( 4 )MS + 6 BA 1 .0 ;( 5 )MS + 6 BA 1 .0 +NAA 0 .1。壮苗培养基 :( 6)MS + 6 BA 0 .5 +GA 1 .0。生根培养基 :( 7)1 /2MS +IBA 1 .0 ;( 8) 1 /2MS +IBA 0 .5 +NAA0 .1 ;( 9) 1 /2MS +IBA 0 .2 5。以上除生根培养基外均加入蔗糖 30 g·L- 1 ,生根培养基加蔗糖 1 0 g·L- 1 ,琼脂 6g·L- 1 ,pH 5 …     

东方百合"索邦"的花器官培养与快速繁殖

以东方百合"索邦"(Lilium orential "Sorbonne")的花梗、花托、花瓣和花丝为外植体,进行了离体培养与快速繁殖研究.结果表明,4种花器官均可直接诱导产生不定芽,诱导不定芽的适宜培养基为N6+ BA 1.0 mg·L-1 + KT 1.0 mg·L-1 + NAA 0.2 mg·L-1;芽增殖的适宜培养基为MS+BA 1.0 mg·L-1 + NAA 0.1 mg·L-1;生根与小鳞茎增殖的适宜培养基为1/2 MS+IBA 0.1～0.2mg·L-1.适宜的移栽基质为珍珠岩与营养土(3∶1)的混合基质.     

蒟蒻薯的组织培养

1　植物名称　薯 (Taccachantrieri) ,又名老虎须、箭根薯。2　材料类别　叶柄。3　培养条件　以MS为基本培养基。 ( 1 )愈伤组织诱导培养基 :MS + 6 BA 1mg·L- 1 (单位下同 ) +NAA 0 .2 ;( 2 )芽分化和增殖培养基 :MS + 6 BA 1～ 2 +NAA 0 .2 ;( 3)生根培养基 :1 /2MS + 6 BA 0 .5 +NAA 1。以上培养基中均加 5 g·L- 1 琼脂粉 ,培养基 ( 1 )和 ( 2 )加 30 g·L- 1 白糖 ,( 3)加 2 0 g·L- 1 白糖、0 .5 g·L- 1 活性碳 ,pH 5 .8。培养温度为 2 5～2 8℃ ,光照 1 0～ 1 2h·d- 1 ,光照度 1 5 0 0～ 2 0 0 0lx。4　生长与分…     

利用丛生芽和愈伤组织微繁技术培养紫茎泽兰的研究

通过丛生芽直接增殖和愈伤组织再分化两条途径建立紫茎泽兰的无性系,可为进一步研究紫茎泽兰入侵的分子生态机制提供植物材料。结果表明:MS+BA2.0mg·L-1+NAA0.05mg·L-1为丛生芽增殖的最适培养基,MS+BA0.1mg·L-1+NAA0.1mg·L-1和MS+BA2.0mg·L-1+NAA0.2mg·L-1分别适于叶片愈伤组织的诱导和分化,而1/2MS+IAA0.1mg·L-1对生根最有利。     

趣蝶莲的离体快速繁殖

1　植物名称　趣蝶莲 (Kalanchoesynsepala)。2　材料类别　不定芽、茎尖、带节茎段。3　培养条件　丛生芽诱导培养基 :( 1 )MS + 6 BA2 .0mg·L- 1 (单位下同 ) +NAA 0 .2 ,( 2 )MS +6 BA 1 .0 +NAA 0 .1 ;增殖培养基 :( 3)MS + 6 BA0 .5 +NAA 0 .0 5 ,( 4 )MS + 6 BA 0 .2 +NAA 0 .0 5 ,( 5 )MS + 6 BA 0 .1 +NAA 0 .0 5 ;生根培养基 :( 6)MS ,( 7)MS +IBA 1 .0 +NAA 0 .2 ,( 8)MS +NAA 0 .5。以上培养基均含 30 g·L- 1 蔗糖、0 .7%琼脂 ,pH 5 .5～5 .8。培养温度 ( 2 8± 2 )℃ ,光照度1 5 0 0～ 2 0 0 0lx ,光照…     

紫叶稠李的离体快速繁殖

1　植物名称　紫叶稠李 (Prunusvirginiana“Schubert”)。2　材料类别　腋芽 (axillarybud)。3　培养条件　基本培养基为MS。诱导芽培养基 :( 1 ) 1 /2MS + 6 BA 1 .0mg·L- 1 (单位下同 ) +NAA0 .0 1。丛生芽增殖培养基 :( 2 ) 1 /2MS + 6 BA1 .0 +NAA 0 .1 ;( 3) 1 /2MS + 6 BA 0 .5 +IAA 0 .1。生根培养基 :( 4 ) 1 /2MS +NAA 0 .5 ;( 5 ) 1 /2MS +IBA 0 .7。其中 ,诱导与增殖培养基添加 3%蔗糖 ,生根培养基添加 2 %蔗糖。生根培养基附加少许活性炭。以上培养基均加入 7%琼脂 ,pH 5 .8～ 6.0。培养温度 ( 2 3± 2 )℃ ,…     

哈密瓜组织培养和离体快繁

1　植物名称　哈密瓜 (Cucumismelovar.sacchar inus)品种金皇后。2　材料类别　子叶。3　培养条件　以MS为基本培养基。 ( 1 )种子发芽培养基 :1 /2MS ;( 2 )愈伤组织诱导培养基 :MS + 6 BA 0 .5mg·L- 1 (单位下同 ) +IBA 0 .1 ;( 3)不定芽诱导培养基 :MS + 6 BA 1 .0 ;( 4 )不定芽伸长培养基 :MS + 6 BA 1 .0 +GA30 .5 ;( 5 )生根培养基 :1 /2MS +IBA 2 .0。以上培养基均附加 0 .8%琼脂、3%蔗糖 ,pH 5 .8。培养温度( 2 6± 1 )℃ ,光照 1 6h·d- 1 ,光照度 2 0 0 0lx。4　生长与分化情况4.1　无菌材料的获得　金皇后种子去皮…     

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.