中国沙参属分类处理与演化关系

根据植物表态,花粉形态和根的组织构造的研究结果,对国产沙参属植物的属下分划和演属化关系进行了研究。将沙参属植物分成４个组,即基生叶组Ｓｅｃｔ．ＢａｓｉｐｈｙｌｌａｅＰ．Ｆ．ＴｕｅｔＧ．Ｊ．Ｘｕ,ｓｅｃｔ．ｎｏｖ．、沙参组Ｓｅｃｔ．ＰａｃｈｙｄｉｃｕｓＦｅｄ．、     

吉林浑江地区早奥陶世亮甲山组的大型短粗壳内角石类

对产自吉林浑江大阳贫早奥陶世亮甲山组的大型粗壳内角石类进行系统进行,共描述２科３属３７种和１个科属未定标本,其中１新属、３新种和２未定种。首次报道Ｐｉｌｏｃｅｒａｔｉｄａｅ科分子（Ｐａｒａｃａｓｓｉｎｏｃｅｒａｓ ｄａｙａｎｇｃｈａｅｎｓｅ ｇｅｎ．ｅｔ ｓｐ．ｎｏｖ．）在东亚的首次发现。提出角石类内体管构造的４个类型。详细讨论Ｍａｎｃｈｕｒｏｃｅｒａｓ和Ｍａｎｃｈｕｒｃｅｒａｉｄａｅ科的地理分布     

三尖杉科的花粉形态及其外壁超微结构研究

本文描述了在光学显微镜,扫描电子显微镜和透射电子显微镜下观察到三尖杉科花粉特征,并对三尖杉属种间的花粉特征进行了对比。据此,笔者支持在三尖杉属内建立篦子三尖杉组Ｓｅｃｔ．Ｐｅｃｔｉｎａｔａｅ Ｌ．Ｋ．Ｆｕ和三尖杉组Ｓｅｃｔ．Ｃｅｐｈａｌｏｔａｘｕｓ的意见。根据花粉形态特征,本文讨论了三尖杉科的范围和分类位置,同时对比了三尖杉科和红豆杉科花粉的异同。花粉形态特征说明两科之间有密切的亲缘关系,三尖杉科     

山茶属的细胞地理学研究

本文收集整理了山茶属的细胞学资料,以细胞地理学的方法探讨该属的起源和演化。在山茶属１４组１１９种植物中有１０组６２种已具染色体数目的报道,５４种已知核型,分别占总数的５２％和４５％。山茶属植物具有稳定的基数（ｘ＝１５）和多变的倍性（２ｘ→８ｘ）。每一个组都有二倍体或全为二倍体;多倍体主要出现在Ｓｅｃｔ．Ｃａｍｅｌｉａ、Ｓｅｃｔ．Ｐａｒａｃａｍｅｌｉａ和Ｓｅｃｔ．Ｔｈｅｏｐｓｉｓ之中,大多分布在山茶属分布区的西部、北部和西北部,呈现出北多南少的趋势。山茶属的核型遵守Ｓｔｅｂｂｉｎｓ的从对称向不对称演化的规律,分布中心靠南的组比靠北的组拥有更对称的核型,表明山茶属从南向北进化和扩散。在已具核型资料的组中,Ｓｅｃｔ．Ａｒｃｈｅｃａｍｅｌｉａ最原始,Ｓｅｃｔ．Ｃａｍｅｌｉａ最进化,包括Ｃ．ｙｕｎｎａｎｅｎｓｉｓ的Ｓｅｃｔ．Ｈｅｔｅｒｏｇｅｎｅａ不可能是山茶属最原始的类群。我们认为山茶属很可能起源于中南半岛,主要向北扩散和进化,在现今的分布中心发生了快速的分化,形成了大量种类     

中国马尾杉属(石杉科)的两个组

本文记述了中国产马尾杉属Ｐｈｌｅｇｍａｒｉｕｒｕｓ（Ｈｅｒｔｅｒ）Ｈｏｌｕｂ的两个组,即龙骨组（新组合）ｓｅｃｔ．Ｃａｒｉｎａｔｕｒｕｓ（Ｈｅｒｔｅｒ）Ｈ．Ｓ．Ｋｕｎｇ ｅｔ Ｌ．Ｂ．Ｚｈａｎｇ和马属组ｓｅｃｔ．Ｐｈｌｅｇｍａｒｉｕｒｕｓ。确认这两组在中国共８种,分别编写了两组的分种检索表及各种的地理分布,并提出一个新异名：Ｐｈ．ｃａｍｃｅｌｌａｔｕｓ ｖａｒ．ｍｉｎｏｒ（＝Ｐｈ．ｃａｎｃｅｌｌａ     

青海齿缘草属（紫草科）－新种

紫草科Ｂｏｒａｇｉｎａｃｅａｅ青海齿缘草属（Ｅｒｉｔｒｉｃｈｊｕｍ）新种,互助齿缘草Ｅ．ｈｕｚｈｕｅｎｓｅ     

东北地区蒿属植物比较形态学研究——II.叶表皮结构

本通过扫描电子显微镜,对东北地区蒿属（Ａｒｔｅｍｉｓｉａ）植物,莳萝蒿组（Ａ．ｓｅｃｔ．Ａｂｓｉｎｔｈｉｕｍ ＤＣ）,艾蒿组（Ｓｅｃｔ．Ａｂｒｏｔａｎｕｍ Ｂｅｓｓ）,艾组（Ｓｅｃｔ．Ａｒｔｅｍｉｓｉａ）,龙蒿组（Ｓｅｃｔ．Ｄｒａｃｕｍｃｕｌｕｓ Ｂｅｓｓ）,牡蒿组（Ｓｅｃｔ．ｌａｔｉｏｂｕｓ Ｙ．Ｒ．Ｌｉｎｇ）３６种成熟代表植物叶表皮形态学特征进行了详尽的比较研究。其中表皮细胞大小、形状不等。     

叶蜂科—新亚科附两新属记述（膜翅目：叶蜂亚目）

本文建立了膜翅目叶蜂科１新亚科：巨基叶蜂亚科Ｍｅｇａｂｅｌｅｓｅｓｉｎａｅ ｓｕｂｆａｍ．ｎｏｖ．,该亚包括２个族：巨基叶蜂族Ｍｅｇａｂｅｌｅｓｅｓｉｎｉｎ ｔｒｉｂ．ｍｏｖ．和枝膜叶蜂族Ｃｌａｄｉｕｃｈｉｎｉ Ｂｅｎｓｏｎ,同时描述了２新属新种：白角横脊叶蜂Ｔｒｉｐｉｄｏｂｅｌｅｓｅｓ ａｌｂｉｃｏｒｎｉｓ ｇｅｎ．ｅｔ ｓｐ．ｎｏｖ．青蓝柄基叶蜂Ｃｏｎｏｂｅｌｅｓｅｓ ｍｅｔａｌｌｉｃｕｓ ｇ     

A NEW SUBFAMILY AND TWO NEW GENERA OF TENTHREDINIDAE(HY-MENOPTERA:TENTHREDINOMORPHA)

本文建立膜翅目叶蜂科１新亚科：巨基叶蜂亚科Ｍｅｇａｂｅｌｅｓｅｓｉｎａｅｓｕｂｆａｍ．ｎｏｖ．,该亚科包括２个族：巨基叶蜂族Ｍｅｇａｂｅｌｅｓｅｓｉｎｉｔｒｉｂ．ｎｏｖ．和枝膜叶蜂族ＣｌａｄｉｕｃｈｉｎｉＢｅｎ－ｓｏｎ,同时描述了２新属新种：白角横脊叶蜂Ｔｒｉｐｉｄｏｂｅｌｅｓｅｓａｌｂｉｃｏｒｎｉｓｇｅｎ．ｅｔｓｐ．ｎｏｖ．青蓝柄基叶蜂Ｃｏｎｏｂｅｌｅｓｅｓｍｅｔａｌｉｃｕｓｇｅｎ．ｅｔｓｐ．ｎｏｖ．;在枝膜叶蜂属下建立１个新亚属：Ａｃｌａｄｉｕｃｈａｓｕｂｇｅｎ．ｎｏｖ．,包括白唇木兰叶蜂ＣｌａｄｉｕｃｈａｍａｇｎｏｌｉａｅＸｉａｏ;并编制了巨基叶蜂亚科族属检索表。     

秦岭的锈菌（续Ⅱ）

采自秦岭林区的锈菌３４属２２８种,其中有６个新种：槭锈孢锈Ａｅｃｉｄｉｕｍ ａｃｅｒｉｓ、糙苏鞘锈Ｃｏｌｅｏｓｐｏｒｉｕｍ ｐｈｌｏｍｉｄｉｓ、秦岭栅锈Ｍｅｌａｍｐｓｏｒａ ｔｓｉｎｌｉｎｇｅｎｓｉｓ、荩草生柄锈Ｐｕｃｃｉｎｉａ ａｒｔｈｒａｘｏｎｉｃｏｌａ、冠毛草柄锈Ｐｕｃｃｉａｎｉａ ｓｔｅｐｈａｎａｃｈｎｅｓ和头状杜鹃夏孢锈Ｕｒｅｄｏ ｒｈｏｄｏｄｅｎｄｒｉ－ｃａｐｉａｔｉ;中国锈菌新记录１     

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.