中国球子蕨科植物孢子形态研究

通过扫描电镜观察,描述了我国球子蕨科4种及分布北美洲的1种植物属种孢子形态特征。根据孢子形态及周壁纹饰特征,探讨种分类归属及等级处理问题。     

宁夏及相邻省中气门螨调查报告(蜱螨亚纲)

在宁夏及相邻省采到中气门螨类42种,其中大陆新记录1种,宁夏及相邻省新记录25种.     

嵩山野生观赏植物研究

在１９８５－１９９１年调查研究的基础上,筛选出嵩山野生观赏植物６３科、１３２属、２５３种及变种。其中行道树、庭园树及风景林树种６３种,花灌木７４种,草本花卉４８种,草坪及耐荫植物３８种,垂直绿化植物２８种,树桩盆景植物２２种,切花植物２５种。最后,对嵩山野生观赏植物的保护和利用,提出了建设性意见。     

高黎贡山地区杜鹃花科特有植物

高黎贡山地区拥有丰富的杜鹃花科特有植物种类。分布于高黎贡山的杜鹃花科特有植物达93种及变种,占该地区杜鹃花科总种数和变种数187种的49%强,其中有中国特有种38种及变种,云南特有种5种,高黎贡山地区特有种50种及变种。本文分别对不同类别的杜鹃花科特有种及其分布进行讨论。     

秦巴山区食蚜蝇亚科昆虫的初步调查(I)(双翅目:食蚜蝇科)

通过2001~2003年对秦巴山区食蚜蝇亚科昆虫的调查,结合整理陕西师范大学生命科学院及陕西理工学院生物系馆藏标本,初步鉴定出该地区食蚜蝇亚科昆虫5族24属56种,包括2新种、1中国新记录种、37陕西省新记录种及2个末定种。文中给出种类分布、新种描述及新记录种的主要特征,模式标本保存于陕西师范大学动物研究所。     

广东地区红菇属的分类初报及一新种和一新变种

本文根据Henri Romagnesi(1967)的分类系统就作者在广东地区所采集到的红菇属Russula33个种作了分类上的研究。其中新种1种即广东红菇Russula guangdongensis Bi & T.H.Li,sp.nov.,新变种一种即小小红菇Russula minutula var.minor Bi var.nov.和12种国内新记录种。文中有新种及新变种的形态描述及微观图,分种及所属亚组的检索表。     

京津冀外来入侵植物

基于文献报道和分类学考证, 首次全面、系统而又完整地整理了京津冀近20年报道的46科141属210种外来入侵植物种类及信息。经过分析并校正分为国产种和入侵种两大类。国产种又包括一般国产种22科39属39种、国产逸生类9科13属13种、国产归化类3科3属4种、国产入侵类1科1属1种; 外来种包括实则在京津冀没有达到入侵的温室及露地栽培类8科9属9种、外来逸生类12科32属36种、外来归化类10科19属20种、外来有待观察类6科6属6种, 真正对京津冀构成入侵的外来植物20科48属82种。根据京津冀目前标本数目及采集时间、京津冀报道文献次数及具体内容描述, 结合国家入侵等级及京津冀部分地区的实地考察情况, 对82个入侵种进行入侵级别划分, 分析并讨论了京津冀外来入侵物种的组成、原产地、分布特征、生活型和入侵途径以及京津冀外来入侵植物的危害现状, 并提出防治及管理措施。     

石耳科(子囊菌门)的新种和新分布

本文报导了石耳科的八个种,其中新种四个,即阿尔泰石耳,鳞芽石耳、亚石耳及太白石耳;三个种是中国的新分布,即皱石耳、亚光石耳及淡腹疤脐衣;一个种即白根石耳为中国及蒙古的新分布。     

中国亚热带常绿阔叶林优势种常见种分布与气候的相关分析

 广泛收集植物的分布资料,包括杨梅科、胡桃科、壳斗科、木兰科、樟科、山茶科、金缕梅科、交让木科、杜英科、五加科、安息香科、冬青科、杜鹃花科、山矾科的优势种和常见种112个,利用目前在国际上被认为是较好的几种研究植被—气候相互关系的指标和方法,包括：Kira方法;Penman公式;Thornthwaite方法与分类;Holdridge生命地带分类系统指标与方法,分析中国亚热带常绿阔叶林优势种及常见种分布与气候的生态关系,找出它们的地理分布特征和气候指标特征,建立现代植被与气候的关系。(1)利用Kira的温暖指数(WI)和寒冷指数(CI)及徐文铎的湿润指数(HI),计算了中国亚热带常绿阔叶林112个优势种及常见种的水热指标值,分析了树种分布与气候的关系,并将优势种及常见种划分为5个Kira水热指标分布类群。(2)计算了112个优势种及常见种的Penman可能蒸散(PET)和干燥度(A)值,划分了5个优势种及常见种的Penman水热指标分布类群。(3)计算了树种的Thornthwaite潜在可能蒸散(APE)及湿润指数(IH)、干旱指数(IA)和水分指数(IM),划分了优势种及常见种的Thornthwaite水热指标分布类群。(4)计算了树种的Holdridge生物温度(BT)、可能蒸散(PE)、降水量(P)及可能蒸散率(PER),划分了优势种及常见种的Holdridge水热指标分布类群。     

宁夏及相邻省中气门螨调查报告（蜱螨亚纲）（5）

在宁夏及相邻省采到中气门螨58种,其中宁夏及相邻省新记录10种。     

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.