西藏钝果寄生属（桑寄生科）二新变种

盐井钝果寄生新变种Ｔａｘｉｌｕｓｄｅｌａｖａｙｉ（ＶａｎＴｉｅｇｈ．）ＤａｎｓｅｒｖａｒｙａｎｊｉｎｇｅｎｓｉｓＷ．Ｌ．Ｃｈｅｎｇ,ｖａｒｎｏｖ．Ａｖａｒ．ｄｅｌａｖａｙｏｄｉｆｅｒｔｐｅｄｉｃｅｌｏｂｒｅｖｉ（１５～２ｍｍｌｏｎｇｏ）,ｌｏｂｏ...     

大花珍珠菜一新变种

短雄大花珍珠菜新变种图１ＬｙｓｉｍａｃｈｉａｖｉｏｌａｓｃｅｎｓＦｒａｎｃｈ．ｖａｒ．ｂｒｅｖｉｓ－ｔａｍｉｎａＹ．Ｙ．Ｑｉａｎ,ｖａｒ．ｎｏｖ．Ａｖａｒ．ｖｉｏｌａｓｃｅｎｔｉｄｉｆｅｒｔｃａｕｌｅｓｕｐｅｒｎｅｒａｍｉ ｆｉｃａｎｔｉ,ｆｏｌｉｓ...     

发根土壤杆菌对葛属药用植物的遗传转化

葛根是传统中药。利用发根土壤杆菌（Ａｇｒｏｂａｃｔｅｒｉｕｍ ｒｈｉｚｏｇｅｎｅｓ （Ｒｉｋｅｒ ｅｔ ａｌ．）Ｃｏｎｎ）Ｒ１６０１转化野葛（Ｐｕｅｒａｒｉａ ｌｏｂａｔａ（Ｗｉｌｌｄ．）Ｏｈｗｉ）、山葛（Ｐ．ｌｏｂａｔａ ｖａｒ．ｍｏｎｔａｎａ）和三裂叶野葛（Ｐ．ｐｈａｓｅｏｌｏｉｄｅｓ（Ｒｏｘｂ．）Ｂｅｎｔｈ．）离体叶片,在叶片表面直接形成毛状根。毛状根的诱导频率分别为１６．６％、１６．２％和     

卡颖蜡蝉属Caristianus Distant中国种类记述（同翅目：颖蜡蝉科）

卡颖蜡蝉属ＣａｒｉｓｔｉａｎｕｓＤｉｓｔａｎｔ中国种类记述（同翅目：颖蜡蝉科）周尧,袁锋,王应伦（西北农业大学昆虫研究所,陕西省杨陵区７１２１００）关键词同翅目,颖蜡蝉科,卡颖蜡蝉属,新种,分类学,中国卡颖蜡蝉属ＣａｒｉｓｔｉａｎｕｓＤｉｓｔａｎｔ,...     

西藏报春花属(报春花科)一新变种

凤翔报春①新变种Ｐ．ｓｉｎｏｐｌａｎｔａｇｉｎｅａＢａｌｆ．ｆ．ｖａｒ．ｆｅｎｇｘｉａｎｇｉａｎａＷ．Ｌ．Ｚｈｅｎｇ，ｖａｒ．ｎｏｖ．Ａｖａｒ．ｓｉｎｏｐｌａｎｔａｇｉｎｅａｒｅｃｉｄｉｔｆｏｌｉｓｍａｊｏｒｉｂｕｓ，１２～１９ｃｍｌｏｎｇｉｓ，１?..     

连云港沿岸线海底质中的有孔虫分布及对沉积环境的指示

据２９个底质样中４４个主要有孔虫属种,运用Ｑ型聚类分析,连云港沿岸线海海底表层沉积中有孔虫可划分为二个组合：Ａ．Ａｍｍｏｎｉａ ｂｅｃｃａｒｉｉ ｖａｒｓ．－Ｅｌｐｈｉｄｉｎｍ ｍａｇｅｌｌａｎｉｃｕｍ组合;Ｂ．Ａｍｍｏｎｙａ ｂｅｃｃａｒｉｉ ｖａｒｓ．－Ｔｅｘｔｕｌａｒｉａ ｆｏｌｉａｃｅａ组合。其分布主要受研究区水团控制,可分别代表苏北沿岸流起始段和黄海水团边缘水体的有孔虫组合。以有孔虫为指     

中国顶丝藻科（Acrochaetiaceae）新记录Ⅱ

继续报导中国顶丝藻科新记录６种。柯狄旋体藻Ａｕｄｏｕｉｎｅｌａｃｏｄｉ,栖松旋体藻Ａ．ｃｏｄｉｃｏｌａ,半露旋体藻Ａ．ｅｍｅｒｇｅｎｓ,紫色旋体藻Ａ．ｐｕｒ－ｐｕｒｅａ,疏枝旋体藻Ａ．ｒｙｕｋｙｕｅｎｓｅ,桑托旋体藻Ａ．ｓａｎｃｔｉ－ｔｈｏｍａｅ。     

矮生栒子的分类学研究

在有关模式和产地标本研究基础上,结合叶表皮微形态和细胞学资料,对矮生Ｘｕｎ子（Ｃｏｔｏｎｅａｓｔｅｒ ｄａｍｍｅｒｉ Ｓｃｈｎｅｉｄ．）进行了分类学修订,结果将Ｃ．ｄａｍｍｅｒｉ Ｓｃｈｎｅｉｄ．ｖａｒ．ｒａｄｉｃａｎｓ Ｓｃｈｎｅｉｄ．（即Ｃ．ｒａｄｉｃａｎｓ（Ｓｃｈｎｅｉｄｅｒ）Ｋｌｏｔｚ）归并作该种的同物异名;并描述了矮生Ｘｕｎ子的１个新亚种,Ｃ．ｄａｍｍｅｒｉ ｓｓｐ．ｓｏｎｇｍｉｎｇｅｎ     

西藏毛茛科新分类群

１色季拉毛茛新变种ＲａｎｕｎｃｕｌｕｓｈｉｒｔｅｌｕｓＲｏｙｌｅｖａｒ．ｓｉｇｙｉｌａｉｃｕｓＷ．Ｌ．Ｃｈｅｎｇ,ｖａｒ．ｎｏｖ．Ａｖａｒ．ｈｉｒｔｅｌｏｄｉｆｅｒｔｆｏｌｉｓｂａｓａｌｉｂｕｓｍｉｎｏｒｉｂｕｓ,ｌａｍｉｎｉｓｃ．２．５ｃｍｄｉａｍ...     

八宝属(Crassulaceae)一新变种

Ｈｙｌｏｔｅｌｅｐｈｉｕｍ　ａｎｇｕｓｔｕｍ（Ｍａｘｉｍ）Ｈ．Ｏｈｂａｖａｒ－ｐｏＪ．Ｍ．Ｚｈａｎｇ耐丑．Ｔ．Ｆｕ,ｖａｒ．ｎｏｖ．Ａｔｎ出ｄ江ＤｒｔｗｈｏＤ回ｒ巴ｌｌｔｉａａｘｉｌｌａｒｅｓ３—５,ｐｅｕｎｃｕｌｉｓ８。１２ｃｍｌｏｎｇｉｓ．Ｓｈａ...     

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.