中国链格孢属的分类研究III．生于漆树科、天南星科和五加科植物上的新种与新记录种

本文报道生于漆树科(Anacardiaceae)植物上的两个链格孢新种,-即盐肤木生链格孢(Alternaria rhoicola T.Y. Zhang et J．Z．Zhang)和陕西链格孢(A.shaanxiensis T.Y．Zhanget J.Z．Zhang);生于天南星科(Araceae)植物上的两个新种,即海芋链格孢(A．Alocasiae T.Y.Zhang et M X．Gao)和独角莲链格孢(A. typhonii T．Y．Zhang et J.Z. Zhang),及生于五加科(Araliaceae)植物上的一个中国新记录种,常春藤链格孢[A. hederae (Alm．＆ Cam.)P． Joly]。新种模式标本保藏在山东农业大学植物病理学标本室(HSAUP)。     

大兴安岭二新变种

发表了采自大兴安岭的二新变种,即黄草苁蓉(Boschniakia rossica var. flavida Y. Zhang et J.Y.Ma.)和白花柳兰(Chamaenerion angustifolium var. albium Y. Zhang et J.Y.Ma)     

中国链格孢属的分类研究IV.生于夹竹桃科和番木瓜科植物上的新种和新变种

报道生于夹竹桃科(Apocynaceae)植物上的链格孢新种2个、新变种2个,即络石链格孢(Alternaria trachelospermi T. Y. Zhang,X. F. Lin et W．Q．Chen)、细极链格孢络石生变种[A.Tenuissima (Nees ex Fr.) Wiltshire var．Trachelospermicola T. Y. Zhang,X. F. Lin et W. Q.Chen]、细极链格孢长春花变种[A. tenuissima (Nees ex Fr．) Wiltshim var catharanthi T. Y. Zhanget X. F. Lin]和长春花生链格孢(A. catharanthicola T．Y Zhang),及生于番木瓜科(Caricaccae)植物上的番术瓜链格孢(A. caricae T. Y. Zhang,W．Q Chen et X. F. Lin)。新种和新变种均有拉丁文特征描述,并附绘图。新分类单位的模式标本分别存放在西北农业大学真菌标本室(HMUABO)和山东农业大学植物病理标本室(HSAUP)．     

中国链格孢属分类研究 V.生于锦葵科、睡莲科和蔷薇科植物上的新种、新名称和中国新记录种*

含链格孢2个新种、1个新名称和4个新记录：朱槿链格孢Alternaria rosa-sinensisM. X. Gao et T. Y. Zhang, sp. Nov.、地榆链格孢A. sanguisorbae M. X. Gao et T. Y.Zhang, sp. Nov.、莲生链格孢A. nelumbicola T. Y. Zhang, nom. Nov.、锦葵链格孢A. malvae Roum. Et Letendre.、苹果生链格孢A. pomicola A. S. Horne、杏链格孢A. pruni和塔米链格孢A. tamijiana。新种有拉丁文特征描述和绘图。新种的模式标本分别保藏在山东农业大学植物病理学标本室（HSAUP）和西北农业大学真菌标本室（HMUABO）。     

李属一新变种

本文发表了李属一新变种,即Prunus solicina L.var.cordata Y.He etJ.Y.Zhang     

杏属三新变种

本文发表了杏属三新变种1.Armeniaca sibirica(L.)Lam.var.pleniflorJ.Y.Zhang et.al 2.Armeniaca vulgaris Lam.var.xiongyueensis T.Z.Liet al.3.Armeniaca vulgaris Lam.var.meixianensis J.Y.Zhang et al.     

湖南十字花科一新种

双牌泡果荠 新种 图1 砍莱(俗称) Hilliella shuangpaiensis Z. Y. Li, sp. nov. Species H. alatipedi (Hand. -Mazz.) Y. H. Zhang et H. W. Li et H. paradoxae (Hance) Y. H. Zhang et H. W. Li affinis, a qua foliis basalibus pinnatis 8—9-foliolatis, floribus minoribus, sepalis petalo subacquilongis, siliculis orbicularibus, 2 (-3) ovulatis differt.     

泡果荠属(十字花科)五新种

长柱泡果荠 图1 Hilliella longistyla Y.H.Zhang,sp.nov. Haec species proxima H.changhuaensi Y.H.Zhang,a qua racemis longio-ribus,laxioribus,siliculis longe obovoideis,stylis longioribus,sub fructu c.2mmlongis,seminibus superificie tuberculis minoribus dense munitis recedit. Herba annua.Caulis erectus,c.42cm vel ultra altus,2.5—3mm crassus,striatus,nodis hispidulis.Folia caulina mediana et suprema trifoliolata;foliolamembranacea vel chartacea,subtus et supra ad nervos strigosa,nervis lateralibus 5     

中国链格孢属分类研究 V. 生于锦葵科、睡莲科和蔷薇科植物上的新种、新名称和中国新记录种

含链格孢2个新种、1个新名称和4个新记录朱槿链格孢Alternariarosa-sinensisM.X.GaoetT.Y.Zhang,sp.nov.、地榆链格孢A.sanguisorbaeM.X.GaoetT.Y.Zhang,sp.nov.、莲生链格孢A.nelumbicolaT.Y.Zhang,nom.nov.、锦葵链格孢A.malvaeRoum.etLetendre.、苹果生链格孢A.pomicolaA.S.Horne、杏链格孢A.pruni和塔米链格孢A.tamijiana。新种有拉丁文特征描述和绘图。新种的模式标本分别保藏在山东农业大学植物病理学标本室（HSAUP）和西北农业大学真菌标本室（HMUABO）。     

笃斯越桔新变种

发表了采自大兴安岭地区松岭的笃斯越桔一新变种,果白色(非蓝紫色),命名为:Vaccinium uliginosum L.var.albium J.Y.Ma et Y.Zhang.     

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.