鄂西南香蒲科、黑三棱科、眼子菜科和茨藻科植物区系特征

本文在采集标本基础上,结合分析大量有关资料,讨论了鄂西南香蒲科等四科植物区系特征。结果表明:1.区系组成包括5属20种2变种1杂种。其中有1新种1新变种和3个湖北分布新记录。2.区系种类丰富,起源古老,对湖北同类区系具有代表性。3.有一定比例的特有成分(8.70%)。4.区系地理成分复杂多样,但主要具有东亚亚热带一温带分布(26.09%)和世界性分布(26.09%)的性质。5.本区四科植物区系主要与处于我国地貌第三级阶梯上的省区发生密切联系。其区系分区,在亚区的划分上与陆生种子植物相同。     

云南虉草族植物的订正

在禾本科植物编志工作中,我们先后订正了一些族、属和种的分类学问题,发现了不少新植物和一些在我国境内首次记录的种。本文只报道云南虉草族的各分类群,包括茅香属1种,黄花茅属4种1变种,其中1个是新种,1个是新变种,1种是中国新记录,虉草属3种及1变种,其中2种是中国新记录。     

中国鹅观草属的分类研究

本文对中国鹅观草属Roegneria进行了分类修订,提出了一个新的分类系统。新系统包括19个新组合或新等级,并按照颖分组、芒分系的原则确认了中国该属植物4组、18系、79种、22变种,其中包括7新系、5新种和1新变种。此外,一些类群的省级分布新记录也在本文作了报道。     

武汉东湖南部湖汊的鼓藻类

从1963年9月到1964年12月,作者在武汉东湖南部的湖汊定点采得48号藻类标本,其鼓藻类十分丰富,经鉴定共有20个属,164个种,75个变种和13个变型。其中有2个新种、7个新变种和2个新变型,12个种、25个变种和5个变型是中国的新记录;在四季中出现频率较高的优势种类有11个种和1个变种。在不同季节共6次所采得的鼓藻种类的统计结果得出,在夏季(6月、8月)的种类最多,秋季和冬季(9月、10月、12月)次之,春季(4月)最少。在东湖252个鼓藻类的分类单位中,热带、亚热带类群共有45个,其中的19个是南亚和东南亚地区特有或普遍分布的类群,13个是以广西为模式产地的类群,从而反映武汉地区鼓藻类区系具有亚热带类型的特点,并与南亚和东南亚的鼓藻类区系关系密切。     

中国金合欢属植物的分类,分布及其区系的起源

本文对中国金合欢属(Acacia Miller)的分类、分布及其区系的起源进行了初步的研究;初步确立了本地区金合欢属植物约13种,3变种,其中包括2个新记录种,2个新变种;它们主要分布在西南及华南热带亚热带地区,尤以云南为最多。中国的金合欢届种类较贫乏,主要属Subgen. Aculeiferum,且几乎都是较原始的“A. pennata”体态,大都处于其分布区的边缘,种间关系较密切,区系比较年轻。该区系是中南半岛金合欢区系的一部分,除Subgen. Heterophyllum是来自澳洲外,其余最终通过印度板块来自非洲。     

中国东北无隔藻科的研究

本文报道了中国东北无隔藻科18种2变种2变型,其中有1新种1新变型2新组合,中国记录4种1变种,东北新记录3种,其中大部分种类结合室内培养对种的形态变化进行了研究。本文还对东北无隔藻科植物的生态分布、分类上混乱的问题进行系统的整理和讨论。     

中国云南纳板河国家级自然保护区苔藓植物研究

在野外调查和标本鉴定的基础上,首次报道了中国云南纳板河流域国家级自然保护区有苔藓植物59科157属385种3变种3亚种,包括中国大陆新记录种3种,云南新记录属2属,新记录种和亚种12种;西双版纳地区新记录科4科,新记录属12属,新记录种140种.同时,对优势科属种组成及生境类型进行了初步分析,为我国热带地区苔藓植物区系研究提供了丰富资料.     

中国鹅鸡草属的分类研究

本对中国鹅观草属Ｒｏｅｇｎｅｒｉａ进行分类修订,提出了一个新的分类系统。新系统包括１９个新组合成新等级,并按照颖分组、荒分系的原则确认了中国该属植物４组、１８系、７９种、２２变种,其中包括７新系、５新种和１新变种。此外,一些类群的省级分布新记录在本作了报道。     

江苏省云台山白粉菌研究 V. 白粉菌的一新变种和一新记录种

报道了白粉菌目的一个新变种和一个中国新记录种。新变种:苋生蒙加拉白粉菌Erysiphemunjalii var.amaranthicola,寄生在苋科皱果苋Amaranthus viridis上;新记录种:山田叉丝壳Microsphaera yamadai,寄生在鼠李科拐枣Hovenia dulcis上。新变种有中文和拉丁文描述。研究标本保存在中国科学院微生物研究所菌物标本馆(HMAS)。     

冬菇属的新变种和中国新记录种（英文）

冬菇属Flammulina真菌是重要的食用菌,在东亚广为栽培。基于形态特征及内转录间隔区(ITS)序列分析,报道了该属真菌的两个新变种——冬菇丝盖变种F.velutipes var.filiformis和冬菇喜玛拉雅变种F.velutipes var.himalayana,以及中国的一个新记录种——杨树冬菇F.populicola。提供了中国冬菇属已知物种和变种的形态描述、生境照片及检索表。     

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.