广西被子植物二新记录属

在第四次中药资源普查中采集了大量标本,经过对这些标本进行仔细鉴定并查阅相关资料,确定其中两号标本为香茜属(Carlemannia Benth.)和粘腺果属(Commicarpus Standl.)植物。这两属植物在广西尚无报道,为首次记录。香茜属植物叶对生,子房下位,无托叶,雄蕊仅有2枚,这和茜草科相似但又不同,系统位置较混乱,以前曾放于茜草科( Rubiaceae)和忍冬科( Caprifoliaceae)中,最近该属和蜘蛛花属独立成香茜科( Car-lemanniaceae)。该属植物共有3种,沿喜马拉雅山脉向东一直分布到缅甸、越南北部。我国西藏东南、云南南部、广西西北部分布一种即香茜( Carlenannia chinenesis Hook. f.)。粘腺果属是紫茉莉科( Nyctaginaceae)主产热带地区的1个属,全世界约25种分布于热带非洲和阿拉伯半岛南部,在南亚、东南亚和墨西哥至热带美洲也有少量分布。中国产2种,其中广西产1种即中华粘腺果[ Commiaicarpus chinensis ( L.) Heim.]。该种植物分布广泛,从南亚次大陆向东至中南半岛、马来半岛,向北到我国西沙群岛、海南岛以及广州附近,在广西首次记录,产凤山县和凌云县。     

栅锈菌属一新种

本文报告在包头市采于茜草科六月雪[Serissa serissoides(DC.)Druce]上的锈菌一新种——六月雪栅锈菌[Melampsora serissicola Shang,R.X.Li et D.S.Wang]。茜草科和六月雪属为栅锈菌属真菌的新报道寄主科、属。     

阿萨姆石丁香一新异名(英)

在修订茜草科绣球茜届（DunniaTutch．）过程中,笔者注意到Ridsdale在发表阿萨姆绣球茜（Dunniaassamica（Hook.f．）Ridsd．）新组合时,因忽视了花萼裂片和苞片的区别而将阿萨姆石丁香（HymenopogonassamicusHook．f）错误地转隶绣球茜属,现予以更正,并将其作为新改名的阿萨姆石丁香（Neohymenopogonassamicus（Hook．f．）Bennet）的新异名。     

陕西胡椒科一新记录属--胡椒属

报道了陕西省胡椒科一新记录属——胡椒属(Piper Linn．)及一新记录种——竹叶胡椒(P．bambusifolium Y．C．Tseng)。     

阿萨姆石丁香一新异名(英)

在修订茜草科绣球茜属过程中,笔者注意到Ｒｉｄｓｄａｌｅ在发表阿萨姆绣球茜新组合时,因忽视了花萼裂片和苞片的区别而将阿萨姆石丁香错误地转隶绣球茜属,现予以更正,并将其作为新改名的阿萨姆石丁香的新异名。     

中国条脊牙甲科昆虫及一新种记述

条脊牙甲科(Hydrochidae)仅两属,我国仅报道一属二种,即越南条脊牙甲Hydrochus annamita Regimbart和日本条脊牙甲Hydrochus japonicus Sharp。该文记述了一新种脊鞘条脊牙甲Hydrochus rhytipterus sp.nov. 和一新记录种瘤鞘条脊牙甲Hydrochus binodosus Motschulsky。     

玉叶金花一新变种

报道了茜草科玉叶金花属玉叶金花一新变种,即白花玉叶金花Mussaenda pubescens Ait．f.var．alba X．F．Denget D．X．Zhang,var．nov．     

广东省野生植物一新记录科——蜡梅科

报道了广东省野生植物一新记录科--蜡梅科(Calycanthaceae)、一新记录属--蜡梅属(Chimonanthus)及一新记录种--山蜡梅(Chimonanthus nitens Oliv.).标本存放于华南农业大学林学院树木标本室(CANT).     

栀子花香飘初夏

初夏,栀子花开,乳白色的花朵或亭亭玉立,或若隐若现在翠绿的叶中,芳香扑鼻,深受人们喜爱。栀子(Gardenia jasmineoides)又名白蟾花,黄栀子、越桃、木丹、林兰,是茜草科栀子属的常绿灌木或小乔木,是名贵的花木之一。它在我国栽培历史悠久,早在2100多年以前司马相如《上林赋》就提到:“鲜支黄励”,鲜支即栀子,当时的栀子是重要的经济作物,其果实采收后可作黄色染料,用来染缯帛,可以给种植者带来利润。西汉司马迁《史记货殖列传》记载:“千亩栀茜,其人与千户侯等。”说明当时栀子是重要的经济作物。由于栀子花香芬芳,花瓣晶莹如玉,具有很高的…     

陕西省百合科一新记录属——独尾草属

报道了陕西省百合科一新记录属——独尾草属(Eremurus M.Bieb.),及一新记录种——独尾草(Eremurus chinensis Fedtsch.).     

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.