什么是ISI的BBCI产品?

美国科学信息研究所（ＩＳＩ）的产品和服务（ｐｒｏｄｕｃｔｓ＆ｓｅｒｖｉｃｅｓ）中，引文数据库（ｃｉｔａｔｉｏｎｄａｔａｂａｓｅｓ）占很大的比重，大家熟知的ＳＣＩ（ｓｃｉｅｎｃｅｃｉｔａｔｉｏｎｉｎｄｅｘ）就是该数据库中的一种重要产品。如果细分的话，今...     

果园生态栽培及其生理生态效应研究进展

果园生态栽培及其生理生态效应研究进展周志翔李国怀徐永荣（华中农业大学,武汉４３００７０）ＯｒｃｈａｒｄＥｃｏｃｕｌｔｉｖａｔｉｏｎａｎｄｔｈｅＲｅｓｅａｒｃｈＡｄｖａｎｃｅｓｏｆＥｃｏｐｈｙｓｉｏｌｏｇｉｃａｌＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＦｒｕ...     

中国茜草科资料之二

在编研《中国植物志》茜草科的过程中,对龙船花属（Ｉｘｏｒａ）植物作进一步检查和整理,共发现６个新分类群Ｉｘｏｒａｉｎｓｉｇｎｉｓ,Ｉ．ａｍｐｌｅｘｉｃａｕｌｉｓ,Ｉ．ａｕｒｉｃｕｌａｒｉｓ,Ｉ．ｐａｒａｏｐａｒａ,Ｉ．ｆｏｎｃｈｅｗｉ,Ｉ．ｇｒａｃｉｌｉｓ;新种的模式标本保存在中国科学院华南植物研究所标本馆（ＩＢＳＣ）。     

江西二叠-三叠系界线层的牙形刺及Hindeodus-Isarcicela的演化谱系

对江西修水清水岩乡东岭剖面和乐平沿沟剖面的再研究表明,ＨｉｎｄｅｏｄｕｓｐａｒｖｕｓＭｏｒｐｈｏｔｙｐｅ１在东岭剖面首现于大冶组的最低层位,生物地层界线与岩石地层界线一致,仅比事件地层界线高５－６ｃｍ。沿沟剖面Ｈｉｎｄｅｏｄｕｓｐａｒｖｕｓ带厚仅３６ｃｍ,其首现与岩石地层界线也一致。张克信等提出的Ｈ．ｌａｔｉｄｅｎｔａｔｕｓ→Ｈ．ｐａｒｖｕｓ→Ｈ．ｔｕｒｇｉｄｕｓ→Ｉ．ｉｓａｒｃｉｃａ的演化谱系需作进一步修正。依据华南的资料,本文第一作者提出新的演化谱系：Ｈ．ｌａｔｉｄｅｎｔａｔｕｓ→Ｈ．ｐａｒｖｕｓ→Ｉ．ｓｔａｅｓｃｈｅｉ→Ｉ．ｉｓａｒｃｉｃａ。Ｈ．ｔｕｒｇｉｄｕｓ并不在此演化系列中,它属Ｈｉｎｄｅｏｄｕｓ的另一分枝。二叠三叠系界线层的牙形刺应区分出浮游相与浅水相。在浮游相,牙形刺序列为：（１）ＣｌａｒｋｉｎａｃｈａｎｇｘｉｎｇｅｎｓｉｓＣ．ｄｅｆｌｅｃｔａ带,（２）Ｃ．ｃａｒｉｎａｔａ带,（３）Ｃ．ｐｌａｎａｔａ带。在浅水相,牙形刺序列为：（１）Ｈ．ｌａｔｉｄｅｎｔａｔｕｓ带,（２）Ｈ．ｐａｒｖｕｓ带,（３）Ｉ．ｓｔａｅｓｃｈｅｉ带,（４）Ｉ．ｉｓａｒｃｉｃａ带,（５）Ｈ．ｐｏｓｔｐａｒｖｕｓ带     

林茶间作下的光照条件与茶树生理生态研究综述

林茶间作下的光照条件与茶树生理生态研究综述周志翔（华中农业大学林学系,武汉４３００７０）ＲｅｖｉｅｗｏｎＬｉｇｈｔＶａｒｉａｔｉｏｎｉｎＴｅａａｎｄＯｔｈｅｒＷｏｏｄｙＰｌａｎｔｓＩｎｔｅｒｃｒｏｐｐｅｄＰｌａｎｔａｔｉｏｎｓａｎｄＥｃｏ－ｐｈｙｓｉ...     

农杆菌介导的植物遗传转化进展

农杆菌介导的植物遗传转化进展.李子银＠胡会庆.华中农业大学作物遗传改良国家重点实验室农杆菌介导的植物遗传转化进展李子银胡会庆（华中农业大学作物遗传改良国家重点实验室武汉４３００７０）根癌农杆菌（Ａｇｒｏｂａｃｔｅｒｉｕｍｔｕｍｅｆａｃｉｅｎｓ）和发根农杆菌（Ａｇｒｏｂａｃｔｅｒｉｕｍｒｈｉｚｏｇｅｎｅｓ）是两种寄主非常广泛的土壤细菌,在自然状态下它们能通过伤口侵染植物,分别导致冠瘿瘤和毛...     

柑桔园生草栽培的生态效应研究

柑桔园生草栽培的生态效应研究李国怀章文才刘继红胡德文（华中农业大学园艺系,武汉４３００７０）ＳｔｕｄｉｅｓｏｆＥｃｏｌｏｇｉｃａｌＥｆｅｃｔｓｏｆＳｏｄＣｕｌｔｕｒｅｉｎＣｉｔｒｕｓＯｒｃｈａｒｄ．ＬｉＧｕｏｈｕａｉ,ＺｈａｎｇＷｅｎｃａｉ,ＬｉｕＪ...     

镉铅单一和复合污染对小白菜抗坏血酸含量的影响

镉铅单一和复合污染对小白菜抗坏血酸含量的影响秦天才吴玉树（华中农业大学,武汉４３００７０）（云南大学,昆明６５００９１）黄巧云胡红青（华中农业大学,武汉４３００７０）ＥｆｆｅｃｔｓｏｆＣａｄｍｉｕｍ,ＬｅａｄＳｉｎｇｌｅａｎｄＣｏｍｂｉｎａｔｉｏｎＰ...     

丘陵地区农户生态系统演替分析

丘陵地区农户生态系统演替分析曹凑贵（华中农业大学,武汉４３００７０）ＥｖｏｌｕｔｉｏｎａｒｙＡｎａｌｙｓｉｓｏｎＨｏｕｓｅｋｏｌｄＥｃｏｓｙｓｔｅｍｉｎＨＩＩＩｙＲｅｇｉｏｎｓ￥ＣａｏＣｏｕｇｕｉ（ＣｅｎｔｒａｌＣｈｉｎａＡｇｒｉｃｕｌｄｔｕｒａｌＵｎｉｖｅｒｓｉｔｙ,Ｗｕｈａｎ４３００７０）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（２）：５３－５４．Ｔｈｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｄｉｆｆｅｒｅｎｔｔｙｐｅｈｏｕｓｅｈｏｌｄｅｃｏｓｙｓｔｅｍｓａｎｄｔｈｅｉｒｅｖｏｌｕｔｉｏｎａｒｙｃｏｒｒｅｌａｔｉｏｎｓａｒｅａｎａｌｙｚｅｄｕｓｉｎｇｆｕｚｚｙｃｌｕｓｔｅｒｉｎｇａｎｄｓｙｓｔｅｍｓｙｎｔｈｅｔｉｃｅｖｏｌｕｔｉｏｎｍｅｔｈｏｄｓ,Ｔｈｅｃａｕｓｅａｎｄｄｉｒｅｃｔｉｏｎｏｆａｇｒｉｃｕｌｔｕｒａｌｄｅｖｅｌｏｐｍｅｎｔｉｎｈｉｌｌｙｒｅｇｉｏｎｓａｒｅｒｅｖｅａｌｅｄａｎｄｓｕｇｇｅｓｔｉｏｎｓｏｎｄｅｖｅｌｏｐｉｎｇｅｃｏ－ａｇｒｉｃｕｌｔｕｒａｌｃｏｎｓｔｒｕｃｔｉｏｎｉｎｌｏｗｅｒｐｒｏｄｕｃｔｉｖｅｈｉｌｌｙｒｅｇｉｏｎｓａｒｅｍａｄｅ．Ｋｅｙｗｏｒｄｓ：ｈｏ     

VA菌根真菌Glomus mosseae对棉花根区微生物量和生物量的影响

ＶＡ菌根真菌Ｇｌｏｍｕｓｍｏｓｓｅａｅ对棉花根区微生物量和生物量的影响顾向阳,胡正嘉（华中农业大学土化系,武汉４３００７０）ＥｆｆｅｃｔｏｆＶＡＭＦｕｎｇｕｓＧｌｏｍｕｓｍｏｓｓｅａｅｏｎＭｉｃｒｏｂｉａｌＰｏｐｕｌａｔｉｏｎａｎｄＢｉｏｍａｓｓｉｎ...     

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.