草珊瑚属两个新变种与海南草珊瑚的比较研究

对广东海南岛、广西、云南产的海南草珊瑚Sarcandra hainanensis(Pei)Swamy et Bailey进行形态学和茎的组织比较研究结果表明,Swamy等描述的海南草珊瑚是一个混杂的种群。本文对海南草珊瑚的描述作了修订,分出两个新变种:屏边草珊瑚S.hainanensis(Pei)Swamy etBailey var.pingbianensis C.Z.Qiao et Q.H.Zhang和陵水草珊瑚S.hainanensis(Pei)Swamy et Bailey var.lingshuinensis C.Z.Qiao et Q.H.Zhang.     

云南及近邻地区竹亚科植物新记录

报道了云南竹亚科新记录种 5种 1变种 ,即吊丝竹 (Dendrocalamus minor(Mc Clure) Chia et H.L.Fung ) ,花吊丝竹 (Dendrocalamus minor var. amoenus(Q. H. Dai et C. F. Huang) Hsueh et D. Z. Li) ,黔竹(Dendrocalamus tsiangii(Mc Clure) Chia et H. L. Fung) ,马甲竹 (Bambusa tulda Roxb.) ,坭竹 (Bambusa gibbaMc Clure)和料慈竹 (Bambusa distegia(Keng et Keng f.) Chia et H.L.Fung)。后两者亦分别为贵州、广西的地理分布新记录种。同时 ,根据对标本和种植于 ' 99昆明世博会竹园的活竹丛的研究 ,讨论了毛环竹亦即毛环单竹 (Bambusa yunnanensis N. H. Xia)的分类学问题 ,将其归并到料慈竹 (Bambusa distegia(Keng et Keng f.) Chiaet H.L.Fung)中。     

云南发现稀有珍贵树种——云南藏榄(英文)

Diploknema yunnanensis D. D. Tao et Z. H. Yang, Q. T. Zhang sp. nov. Fig. 1 Ex affinitate Diploknema butyraceoidi (Scott) H. J. Lam. a qua floribus majoribus, nutantibus, siaminibus 80—90; foliis apice brevi-acuminatis, subtus ad costas et nervos puberulis; ovario discoidco, ferrugineo-villoso; corolla 12-1obata, extus glabra, ad faucum ferruginco-lanata diversa.     

大孢卧孔菌一新组合

本文将刺孢孔菌Pachykytospora中的P. major G. Y. Zheng & Z. S. Bi组合为Megasporoporia major (G.Y. Zheng & Z. S. Bi) Y. C. Dai & T. H. Li,并根据模式标本对该种进行了详细描述。     

中国小石蛾属四新种记述(毛翅目,小石蛾科)

记述小石蛾属Hydroptila 的4新种,双钩小石蛾H.biuncialis Zhou et Yang,sp.nov.(江西),细角小石蛾H.leptocera Zhou et Yang,sp.nov.(江西,广西),内刺小石蛾H.introspinata Zhou et Sun,sp.nov.(黑龙江)和长板小石蛾H.longitabularis Zhou et Yang,sp.nov.(广西);编写了我国小石蛾属分种检索表.模式标本保存于南京农业大学昆虫标本馆.     

雷公青冈和滇南青冈学名订正

分布于华南的雷公青冈Quercus hui Chun和分布于云南及广西的滇南青冈Q.austroglauca(Y.T.Chang)Y.T.Chang长期被认为是我国特有植物,实则分别为越南北部分布的Q.auricoma A.Camus和云南东南部分布的龙迈青冈Q.lungmaiensis(Hu)C.C.Huang & ...     

刺猎蝽属种间转录组比较分析

【目的】建立刺猎蝽属Sclomina 3种的转录组数据库,分析近缘种间转录组表达差异,探讨在转录组水平的种间趋异情况。【方法】采用Illumina HiSeq^TM4000高通量测序平台进行刺猎蝽属齿缘刺猎蝽S.erinacea、兴仁刺猎蝽S.xingrensis和广西刺猎蝽S.guangxiensis 3种转录组测序;利用Nr, Swiss-Prot, COG/KOG和KEGG数据库进行基因功能注释;对种间差异表达基因(differentially expressed genes, DEGs)进行GO功能注释和KEGG通路富集分析。【结果】齿缘刺猎蝽、兴仁刺猎蝽和广西刺猎蝽转录组测序组装获得42 215个unigenes。21 117个基因在上述4个数据库中得到注释(各数据库注释基因数为：Nr, 20 522; Swiss-Prot, 15 550; COG/KOG, 13 969; KEGG,10 850)。兴仁刺猎蝽vs齿缘刺猎蝽转录组有3 390个DEGs (803个上调,2 587个下调),兴仁刺猎蝽vs广西刺猎蝽转录组有12 543个DEGs (6 63...     

几种具纤毛分生孢子的腔孢菌

本文报道了河北省具纤毛(setulae)分生孢子的腔孢菌(Coelomycetes)5种,它们隶属于多毛孢属(Polynema Lev.),星毛孢属(Stauronema H.Sydow,Sydow ＆Butler),刺杯毛孢属(Dinemasporium Lev.)和双毛壳孢属(Discosia Lib.)。其中多毛孢属和星毛孢属系国内新记录属。记载了一新种中国多毛孢(Polynema sinense w.-P.Wu)和一中国新记录种甘蔗星毛孢(Stauronema sacchari H.Sydow,Sydow ＆Butler)。在刺杯毛孢属和双毛壳孢属内共鉴定出3个种,它们是槭刺杯毛孢(Dinemasporium acerinum Peck),刚毛刺杯毛孢(Dinemasporium strigosum(Pets.:Ft.)Sate.)和双毛壳孢(Discosia artocreas(Tode:Fr。)Ff.)。文中对这些种进行了详细描述,新种有拉丁文描述。研究标本保藏于河北省科学院生物研究所。     

中国蜘蛛抱蛋属二新记录种

首次报道了黄瓣蜘蛛抱蛋(Aspidistra lutea H.-J.Tillich)和吉婆岛蜘蛛抱蛋(A.arnautovii H.-J.Tillich)在中国的分布。这两种植物分别被发现于广西西南部的靖西县、龙州县。文中提供了形态学描述和图片。凭证标本存放于广西植物标本馆(IBK)。     

关于岩芋属二个种的模式化问题

岩芋属Remusatia(Araceae)是一个特征鲜明的属,共含三种,即R. vivipara(Lodd. )Schott,R. hookeriana Schott,R. ornata(Schott)H. Li et Q.F.Guo。Gonatanthus (?) ornatus Schott中的 (?) 这类植物转入Remusatia属,其名应为秀丽岩芋Remusatia ornata(Schott)H. Liet Q. F. Guo. Gonatanthuc ornatus 的模式标本是Hooker f.s.n.采自印度喀西山,现只有Schott绘制的模式图照片;Schlagintweit n.313,亦采自喀西山,是Krause(1920)补充描述本种的重要凭证标本,现只有遗图。R. hookeriana Schott(1857)的模式标本Hooker f.s.n.产锡金,Krause(1920)发表的图和描述的大部分可作为该种的凭证,是一个不同于R. ornata的好种。Rao et Verma(1968)所描述的Gonatanthus ornatus应是Remusatia hookeriana。     

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.