膜盘菌属—新种和—中国新记录种(英文)

报道了膜盘菌属Hymenoscyphus 1个新种和1个中国新记录种。新种椭孢膜盘菌H.ellipsoideus来自云南,以其白色、具柄的子囊盘,J+、大小为70–85×8–14.5?m的子囊,椭圆形、具双油滴、大小为14.4–16.7×4–5.5?m的子囊孢子,腐烂的阔叶树叶脉上生为鉴别性特征;中国新记录种变色膜盘菌H.varicosporoides采自河南。提供了每个种宏观和微观特征的详细描述和图示。     

中国小孢盘菌属—新种(英文)

报道了源于我国黑龙江的小孢盘菌属Acervus一新种,即黑龙江小孢盘菌A.heilongjiangensis。该种的显著特征为子囊盘杯状,无柄,直径5–10mm;子实层新鲜时黄色;外囊盘被为角胞组织至表层组织;子囊具囊盖,具8个子囊孢子,孔口在Melzer试剂中不变色,98–119×6.5–8.5μm;子囊孢子椭圆形,无分隔,9–10.5×3.9–5.5μm。对该种的形态学特征进行了描述和图示,并对其分类地位提供了DNA序列分析的佐证。     

热带地区的膜盘菌属一新种（英文）

对采自我国热带地区的柔膜菌科标本进行了研究,发现膜盘菌属1个新种,命名为海南膜盘菌,该种子囊盘盘状、具柄,外囊盘被为矩胞组织、厚60~160μm,盘下层为交错丝组织、厚80~400μm,子囊长棒状、8孢、(58~)61~70×5~6(~7)μm,子囊孢子梭椭圆形、7~8×2.5~3.0μm。对其形态解剖学特征进行了详尽描述和图示,对与相近种的差异进行了讨论。     

晶杯菌科3个新种（英文）

对来自四川、甘肃和青海的晶杯菌科盘菌采集物进行分类研究,发现了3个新种,它们隶属于黄杯菌属和绒被盘菌属。竹黄杯菌的子囊盘直径0.2-0.5mm,子实层表面米色至米灰色;子囊具8个子囊孢子,孔口在Melzer’s试剂中呈蓝色,58-68×4.5-5.5μm;子囊孢子梭形,具一个分隔,8-12×2.3-3μm。单胞黄杯菌的子囊盘盘状,直径1mm,子实层表面污黄色;子囊具8个子囊孢子,孔口在Melzer’s试剂中呈蓝色,82-92×6-8μm;子囊孢子梭形,14-21×2-3.5μm。隔孢绒被盘菌的子囊盘盘状,直径0.5-1mm,子实层表面白色至淡灰色,子层托表面具短棒状细胞延伸物;子囊棒状至近圆柱形,具8个子囊孢子,孔口在Melzer’s试剂中呈蓝色,73-84×6.8-7.5μm;子囊孢子柱梭形,具3个分隔,18-20.5×2.5-3.3μm。     

中国紫盘菌属志略

紫盘菌属Smardaea是Svrcek(1969)在Ascobolus amethystinusPhill.基础上建立的。其主要特征为:子囊非淀粉质,孢子椭圆形,具纹饰,囊盘被组织明显紫色,2层,内层交错丝组织型,外层球胞组织型至角胞组织型。本属成员以前在我国未见报道。作者近年来在研究中国盘菌区系过程中发现本属2个种,一个为紫色紫盘菌S.purpurea Dissing;另一个为新种,命名为小孢紫盘菌S.microspora sp.nov。本新种与本属其它3个种的区别主要在于较小的子囊孢子,低的表面纹饰。     

中国紫盘菌属志略(英文)

紫盘菌属Smardaea是Svrcek(1969)在Ascobolus amethystinusPhill.基础上建立的。其主要特征为:子囊非淀粉质,孢子椭圆形,具纹饰,囊盘被组织明显紫色,2层,内层交错丝组织型,外层球胞组织型至角胞组织型。本属成员以前在我国未见报道。作者近年来在研究中国盘菌区系过程中发现本属2个种,一个为紫色紫盘菌S.purpurea Dissing;另一个为新种,命名为小孢紫盘菌S.microspora sp.nov。本新种与本属其它3个种的区别主要在于较小的子囊孢子,低的表面纹饰。     

盾盘菌属一个新的球孢种——中国盾盘菌

本文报道在我国贵州省发现的一个盾盘菌属新种。此新种具有独特的球形子囊孢子,与该属中目前已知的球孢种类截然不同,故命名为中国盾盘菌Scutellinia sinensis M.H.Liu。根据Schumacher的分类系统,此新种应归属于盾盘菌属Scutellinia中的列氏亚属Subg.Legalia,列氏组Sect.Legalia,列氏系Ser.Legalia。与此新种近似的种是沼生盾盘菌S.paludicola(Boud.)Le Gal,但后者在许多方面均不同于此新种,特别是它的较大的子囊和子囊孢子,孢子表面特征也明显不同。     

葡萄孢盘菌属一新种——蚕豆葡萄孢的有性阶段

本文报道了葡萄孢盘菌属的一个新种:蚕豆葡萄孢盘菌(Botryotinia fabae Lu et T.H.Wu sp.nov.)即蚕豆葡萄孢的有性阶段;并报道了新种子囊盘形成过程;新种有汉文和拉丁文描述。     

中国星裂衣属二新记录种

基于形态学、解剖学和化学特征,报道了2种星裂衣属(Astrochapsa)中国新记录种:假疱星裂衣(A.pseudophlyctis)和察氏星裂衣(A.zahlbruckner).假疱星裂衣的主要识别特征是地衣体壳状,皮层较为致密,子囊盘圆形至不规则形,子囊孢子无色,砖壁型,大小为30～75μm×10～25μm,未检测...     

中国星裂衣属二新记录种（英文）

基于形态学、解剖学和化学特征,报道了2种星裂衣属(Astrochapsa)中国新记录种:假疱星裂衣(A.pseudophlyctis)和察氏星裂衣(A.zahlbruckner)。假疱星裂衣的主要识别特征是地衣体壳状,皮层较为致密,子囊盘圆形至不规则形,子囊孢子无色,砖壁型,大小为30～75μm×10～25μm,未检测到次级代谢产物。察氏星裂衣的主要识别特征是地衣体壳状,子囊盘圆形至不规则形,盘缘凸起外翻且其内表面为白色,子囊孢子无色或浅棕色,砖壁型,大小55～90μm×22～28μm,含有斑点酸。     

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.