肉花卫矛组织培养和再生植株

俯ueCultureandPlantletRe队nerationofEuonymuScar皿osuSLIUEel－Yan,GUODa－Chu（他呷MM（h－c？,An．,公呷M31加＊CHENJun－Lin（Ail712Jz杭＊d咖Iltn,～－x叶（As7．m－－MHh加十批IMILw寸H哗哗则,l附冲刷3卫加听）1植物名称肉花卫矛（Eimmp——Hesml）。2材料类别实生苗的带项芽茎段、子叶切段（带部分上胚轴和下胚轴）、下胚轴切段和根切段。3培养条件（l）诱导芽增殖及继代培养基：MS＋6－BAI．0mg／L（单位下同）;（2）诱导生根培养基：1／2MS＋IBA0．5。均加白糖3％和琼脂0．7％,PH5．8～6,培养室温…     

虎眼万年青的快速繁殖

RapldPropopHonofDrni量ogal艺界mca已丞dalumYINDOng，HUANGBat－on（haitlaeof（lejle。ndqstaim，ha～A，ffe＊＊＊＊＊＊－t｝lzl；wrwi，CfollocmDz130024）1植物名称虎眼万年青（Drnitogalumcaudatum）。2材料类别子鳞茎。3塔共条件（l）MS＋NAA3．0ms／L（单位下同）＋6     

Permanence and Positive Periodic Solutions for Kolmogorov Competing Species Systems with Periodic Forced Terms

IIntroductionhnsldertheKolmogorovtypeequationswithforcedtermsforn－spedeswheremevectorfunctionIscontinuousandT－periodicInthet—variable（T＞0）andP。（t）IS。COntlnuOuST－period1CfUnCtlol（l—1，2，…，n），。nddoeSn。tCh。ngeitsSignSlfl［0，Inthispaper，wesaythatthesystem（1．1）lspermanent，Ifthereexiststwoconstantssuchthatanysolutionexistsgloballyon［0，＋OO）andthatthereexistsTO＞0suchthatPe。anenceofconslde。dspeczeshasbeenw；delydlscu。edInllte。ture（see［1，2．3Jandtherefer…     

STABLE POSITIVE SOLUTION OF THE NONAUTONOMOUS LOTKA-VOLTERRA MUTUALISTIC SYSTEM

l！ntroductionAutonomousLotka－VolterramutuallstlcsystemhasbeenstudiedInmanypaperE3】,E4］．［5】,ourpurposehereIstoconsiderthenonautonomouStwo－SPPCllsLOtkt－Volterramutuallstlcsystem．WeareconcernedwiththedifferentialequationsbelongtoC‘andC‘isthesetOfsllCOlltlnuouSfunCtionSg：［0,＋。）、RbOUnded。hove。ndbelOWbyCOnst。ms,moreover,notallofa：。（t）（l＜l,j＜n,。／j）arezero．Theper。odlccasehasbeenconsideredIn［1】．Insection3ofthlspaper,westudiedthegeneralcaseoftlmede…     

大丽花的组织培养

TissueCultureofDehlja加nnataWEIban－Li,LIYingZhang,HANBi－Wen（CtherofBdhAlu：YllS‘、,CboAgrhalz7,x－xl！nl。,Sdu,hejmp100094）1植物名称大丽花（Dahliapinnata）。2材料类别块根上所生不定芽的嫩叶。3培养条件诱导芽分化培养基为MS＋＊＊AO．5：g·L’（单位下同）：＋6－＊AO．1＋GA。卫;诱导根分化培养基为1／ZMS＋IBA0．l。培养温度25”C左右,光照12h·d’。电生长与分化情况将外植体嫩叶用无菌去离子水冲洗2～3遍,经灭菌后切成3mmX3mm的小块接种于诱导芽分化的MS培养基上。经过10d培养,外植体…     

光系统Ⅱ颗粒放氧的钙激活和钙定位

1IntroductionTheoxyg6n－evolvingco…。（OEC）ofphotosystem11（ppfi）isahighlycideredstructllleofvanouspolpotideswhichp～dethebindingsltesfortheInompccofactorsandmedi-atetheactionofthem．（GhanotaldsandYoc1990,DebuS1992,Yoc1991）．Thep。essof…。lutiontakesplaceinmD。arthel。佃。－faceofthethylakoidmembrane．Itis“v。byl…恤mpresfo。。－ganese,2。3calciumandsevendCIions．OfthetllleekindsOfionsinvolvedinthephotOSyntheticsPlittingofwater,陶峙见。［［ene——。Ivelyc佃n－tenzed（Ghanota…     

畲族Gc、PGM1、AcP_1、6-ΡGD、ADA和AK1的遗传多态性

对畲族血浆组特异性成分（Ｇｃ）、红细胞磷酸葡萄糖变位酶１（ＰＧＭ１）、酸性磷酸酶（ＡｃＰ１）、６－磷酸葡萄糖酸脱氢酶（６－ＰＧＤ）、腺苷脱氨酶（ＡＤＡ）、腺苷酸激酶（ＡＫ１）的遗传多态性进行了研究。Ｇｃ与ＰＧＭ１是用薄层聚丙烯酰胺凝胶等电聚焦分析的,ＡｃＰ１、６－ＰＧＤ、ＡＤＡ及ＡＫ１是用淀粉凝胶电泳分析的。各基因座的基因频率分别为Ｇｃ＊１Ｆ０．４７２２、Ｇｃ＊１Ｓ０．２４２１、Ｇｃ＊２０．２７３８;ＰＧＭ１＊１Ａ０．５３５７、ＰＧＭ１＊１Ｂ０．１６２７、ＰＧＭ１＊２Ａ０．１５８７、ＰＧＭ１＊２Ｂ０．１４２９;ＡｃＰ＊１Ａ０．１８２５、ＡｃＰ１＊Ｂ０．８１７５;６－ＰＧＤ＊Ａ０．９６８３、６－ＰＧＤ＊Ｂ０．０２７８;ＡＤＡ＊１０．９８８１、ＡＤＡ＊２０．０１１９;ＡＫ１＊１１．００００。畲族Ｇｃ、ＰＧＭ１、ＡｃＰ１、６－ＰＧＤ和ＡＤＡ基因为多态,而ＡＫ１基因为单态。发现１例带有６－ＰＧＤ＊Ｒ和３例带有Ｇｃ＊１Ａ２变异等位基因的个体,其中Ｇｃ＊１Ａ２基因频率为０．０１１９,达到多态水平。     

大麦幼根的组织培养和植株再生

TissueCunureandphnQkiReg6neradonhornYoung压co仿讨11ordertm‘vt－xlgareWANGJun－Hut,ZHENGYong,HUANGChun－Nong（许w偷加ofha＆ie）l‘＊edeq,公呷粒l／tzl,ww吻,他呷M31加12）1植物名称大麦（Hordeumvulgare）。2材料类别幼根。3培养条件（1）种子萌发培养基为MS基本培养基;（2）愈伤诱导培养基为MS＋VB11．0mg／L（单位下同）＋CH500＋2,4D20;（3）继代培养基为诱导培养基十6－BAI．0;（4）分化培养基为MS＋2,4D0．05＋6－BA0．1。培养温度25士IC,至分化前～直暗培养;移入分化培养基后照光24h／d,…     

用ＰＣＲ—ＳＳＯ方法研究云南西部彝族ＨＬＡ—ＤＱＢ１基因的多态性

应用ＰＣＲ－ＳＳＯ基因分型技术,对我国云南西部地区３代内无血缘关系的７６个彝族健康个体进行了ＬＡ－ＤＱＢ１位点的基因分型。结果显示,在ＤＱＢ１的３８个等位基因中,观察到１３个等位基因,云南西彝族表现为ＤＱＢ１＊０３０１（３６．１８％－３６．８４％）最常见。其他频率大于５％的等位基因还有ＤＱＢ１＊０５０２（１０．５３％－１１．１８％）、ＤＱＢ１＊０４０１（９．２１％）、ＤＱＢ１＊０３０２（８．５５％－９．２１％）、ＤＱＢ１*0601(7．８９％）ＤＱＢ１＊０５０３１（６．５８％）、ＤＱＢ１＊０３０３２（５．９２％－６．５８％）。和其他１３个华人群体ＤＱＢ１等位基因的频率比较分析表明,总体上,云南西彝族和其他各华人群体间都存在很大的差异。显示其ＨＬＡ等位基因频率分布的民族独特性。     

Fractals of Protein Backbone Structures

IIntroductionPYOt6lflgy8fTSCtslStfuCtLlf6Withgedffi6tTICMlf－Slffill8Yltyh8sberflStUdi6dfOTiT18flyy6grs,Includingproteinpolypeptldechainfractaldimensions（FD）andtheFDofproteinsurfacest。c－turell－7）．Inl％2,Havlinand匝n－Avraham〔8〕studiedthefractaldlmenslonalltyofcommonplymerchainsbasedonaself、a、idingwalks（SAW）medel,andpresentedamethedforcorn－pUt;。prpOfthepl、erCha;nStrUCtUr。,qu。t;一（1）～（2）．Allenet。l．（2）一putedp］teinFDbyandassumdfracta］inedelofpr…     

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.