贵州竹子新报道

发表了产于贵州的玉山竹属2新种,即窄叶玉山竹和细弱玉山竹。赤竹（Sasa longiligula McClure）、单枝竹（Bonia saxatilis(Chia, H. L. Fung et Y. L. Yang) N. H. Xia）为贵州新分布竹种,并对其中赤竹的花做了补充描述。     

我国云南西部玉山竹属一新种及粗毛箭竹花部特征补记

要发表了产于云南西部的玉山竹属一新种永德玉山竹（Yushania yongdeensis Yi et J．Y．Shi）。补充记载了雪山箭竹（Fargesia lincangensis Yi）的花部特征。     

云南高黎贡山西坡玉山竹属二新种简

发表了云南高黎贡山西坡玉山竹属二新种：大玉山竹（Yushania gigantea Yi et L.Yang）和片马玉山竹（Yushania pianmaensis Yi et L.Yang）。大玉山竹近似西藏玉山竹（Y.xizangensis Yi）,不同在于秆柄粗壮,直径7~12 mm,节间长达2.5 cm;秆较高大,高6~7 m,节间分枝一侧基部扁平或具短纵沟槽;小枝具（5）6（7）叶;叶鞘较长,长（2.5）3.2~4.8 cm;叶柄无毛;叶片较大,长（3.5）10~ 18（20） cm,宽(4.5)8~13（18） mm,易于区别。片马玉山竹相似大玉山竹（Y.gigantea Yi et L.Yang）,但本种秆较矮小,高2.5~4 m,直径1~1.8（2.5） cm;枝条较多而细,在秆上每节12~30枚,直径1~1.5（2） mm;箨鞘背面无毛,箨片较小,长1.5~3.5 cm,宽1~2.5 mm;小枝具叶较少,为（3）4~5枚;叶片较小,长达12.5 cm,宽达8 mm。     

[竹思]簩竹属及其近缘属叶表皮微形态特征

用扫描电镜和光学显微镜对[竹思]簩竹属（Schizostachyum Nees）7个种,及其近缘的梨竹属（Melocanna Trin．）、泡竹属（Pseudostachyum Munro）、薄竹属（Lepzocanna Chia et H．L．Fung）各1个种以及空竹属（Cephalostachyum Munro）6个种的叶表皮微形态特征进行了观察。结果表明竹叶下表皮乳突的形状和在气孔器上及周围的排列式样在这5个属中各有不同,具有重要的分类学和系统学价值。同时我们的结果不支持广义的笃竹属;而梨竹属、空竹属和泡竹属则被支持独立成属。另外,薄竹（Leptocanna chinensis）和红毛[竹思]簩竹（Schizostachyum sanguineum）的叶表皮微形态特征非常接近空竹属;香糯竹（Cephalostachyum pergracile）和金毛空竹（C．virgatum）的叶表皮微形态特征则十分接近[竹思]簩竹属。     

我国云南西部玉山竹属一新种及粗毛箭竹花部特征补记

发表了产于云南西部的玉山竹属一新种永德玉山竹(Yushania yongdeensis Yi et J. Y. Shi)。补充记载了雪山箭竹(Fargesia lincangensis Yi)的花部特征。     

云南高黎贡山西坡玉山竹属二新种

发表了云南高黎贡山西坡玉山竹属二新种:大玉山竹(Yushania gigantea Yi et L.Yang)和片马玉山竹(Yushania pianmaensis Yi et L.Yang)。大玉山竹近似西藏玉山竹(Y.xizangensis Yi),不同在于秆柄粗壮,直径7~12mm,节间长达2.5 cm;秆较高大,高6~7 m,节间分枝一侧基部扁平或具短纵沟槽;小枝具(5)6(7)叶;叶鞘较长,长(2.5)3.2~4.8 cm;叶柄无毛;叶片较大,长(3.5)10~18(20)cm,宽(4.5)8~13(18)mm,易于区别。片马玉山竹相似大玉山竹(Y.gigantea Yi et L.Yang),但本种秆较矮小,高2.5~4 m,直径1~1.8(2.5)cm;枝条较多而细,在秆上每节12~30枚,直径1~1.5(2)mm;箨鞘背面无毛,箨片较小,长1.5~3.5 cm,宽1~2.5 mm;小枝具叶较少,为(3)4~5枚;叶片较小,长达12.5 cm,宽达8 mm。     

中国竹亚科思劳竹属一新种——万石山思劳竹

描述了竹亚科思劳竹属一新种——万石山思劳竹（Schizostachyum wanshishanensis S.H.Chen,K.F.Huang et H.Z.Guo）。该种与思劳竹（S.pseudolima McClure）近缘,但本种箨片较平直,且短,长不及箨鞘之1/2,叶表无毛,叶背具柔毛,易于区别;本种也与沙罗单竹（S.funghomii McClure）近缘,但本种秆梢端细长下垂,叶鞘具有白色短刺毛,易于区别。     

黎平玉山竹，贵州竹亚科一新种

描述了产自贵州的竹亚科一新种:黎平玉山竹(Yushania lipingensis Z. X. Zhang, Y. H. TongZ. Yang)。本种形态上与显耳玉山竹(Y. auctiaurita T. P. Yi)接近,但区别在于该种箨鞘背面密被向上的黄褐色或紫色疣基刺毛,箨耳及叶耳明显弯曲呈镰刀形,鞘口繸毛发达,通常呈放射状,箨舌先端截平,不圆拱,边缘密生短纤毛,箨片腹面被微柔毛,叶片次脉通常5～6对。     

山西被子植物5个新记录种

【目的】为丰富山西省被子植物种质资源,促进中条山生物多样性和森林生态系统的研究。【方法】在大量野外植被调查工作基础上,通过标本鉴定、资料查阅和专家咨询,对中条山植物标本、典型特征照片进行整理。【结果】发现小酸模（Rumex acetosella L.）、伏毛银莲花（Anemone narcissiflora subsp. protracta (Ulbrich) Ziman & Fedoronczuk）、弯曲碎米荠（Cardamine flexuosa With.）、卢氏凤仙花（Impatiens lushiensis Y. L. Chen）、小酸浆（Physalis minima L.）等5种被子植物在山西未有分布记录。【结论】确认该5种植物隶属于5科5属,为山西省被子植物分布新记录,新记录发现不仅丰富了山西省被子植物种质资源,而且对研究山西省生物多样性和森林生态系统也具有重要意义。     

莫古礼(Floyd Alonzo McClure)在华采集和引种竹类植物的历史及其影响

竹类植物是美国采集者在我国采集和引种的一类主要植物。在众多的竹类植物采集者中, 莫古礼(Floyd Alonzo McClure)是最具代表性的一位, 他于1919-1940年在岭南大学开展竹类植物研究, 在此期间多次采集竹类植物标本并引种竹类植物到美国。本研究通过大量文献研究、档案查阅以及实地调研, 整理了莫古礼采集竹类植物的路线和采集地, 并对竹类植物学名进行校对, 分析了莫古礼在华研究、采集和引种竹类植物的历史及其影响。经统计, 莫古礼在华期间竹类植物标本采集地涉及12个省级行政区39个地级市, 主要集中在广东、海南、香港等地; 引种地涉及9个省级行政区的25个地级市; 共采集竹类植物标本727号1,840份, 隶属20属93种(含种下单位, 下同), 分别占我国竹类植物属和种的58.8%和17.4%; 共引种竹类植物255份, 隶属于17属77种, 分别占我国竹类植物属和种的50.0%和14.4%。莫古礼在华采集和引种竹类植物极大地发展了竹类植物分类学, 所采集的竹类植物标本为后人竹类植物研究提供了极大的帮助, 所引种的竹类植物极大丰富了美国竹类植物种类, 也促进了竹类植物在美国的应用。     

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.