中国爵床科一新组合——尾叶爵床(英文)

尾叶纤穗爵床(Leptostachya caudatiflora H. S.Lo D.Fang)的花药下方一室基部具距,应为爵床属植物,提出1个新组合——尾叶爵床(Justicia caudatifolia (H.S.Lo D.Fang) Z.P.Hao,Y.F.Deng T.Daniel),而纤穗爵床属仍为单种属。     

中国爵床属（爵床科）新名称

在编写《广东植物志》爵床科的过程中,我们采用广义爵床属Justicia的概念,因此有部分种类的名称需要重新组合.提出了爵床属4个新名称：矮爵床J.demissa N.H.Xia＆Y.F.Deng,海南爵床J.hainanensis（C.Y.Wu＆H.S.Lo）N.H.Xia＆Y.F.Deng,线叶爵床J.neolinearifoliaN.H.Xia＆Y.F.Deng和两广线叶爵床J.neolinearifolia N.H.Xia＆Y.F.Deng subsp.liangkwangensis（H.S.Lo）N.H.Xia＆Y.F.Deng.     

国产爵床科鳞花草族1属、穿心莲族2属和爵床族8属植物的花粉形态

报道了中国爵床科Acanthaceae爵床亚科Ruellioideae鳞花草族Lepidagathideae 1属、穿心莲族Andrographideae 2属和爵床族Justicieae 8属共14种植物的花粉形态。根据花粉萌发孔类型和外壁纹饰特征,可将这些植物的花粉归为4个类型: (1)具3孔沟,外壁具网状纹饰。该类型见于色萼花属Chroesthes (采自广西样品)和穿心莲属Andrographis植物。(2)具3孔沟及假沟(肋条带型)类型,外壁具网状纹饰,网眼纵向排列成行,网眼内有细网纹。该类型见于色萼花属(采自云南样品)和鳔冠花属Cystacanthus。(3)具3孔沟,沟两侧各有1条假沟,外壁具网状纹饰。该类型见于瑞丽山壳骨Pseuderanthemum shweliense、狗肝菜属Dicliptera和驳骨草属Gendarussa植物。(4)具2孔沟,沟两侧具斑块。该类型见于山壳骨属Pseuderanthemum 1种、纤穗爵床属Leptostachya、鳄嘴花属Clinacanthus、鸭嘴花属Adhatoda、杜根藤属Calophanoides和野靛棵属Mananthes植物。     

爵床属一新变型

发表了爵床属一新变型即白花爵床     

中国爵床科—新记录种——毛萼爵床

报道中国爵床-(Acanthaceae)爵床属—新记录种——毛萼爵床(Justicia poilanei Benoist).该种分布于云南南部石灰岩地区,在标本馆长期被鉴定为野靛棵(Justicia patentiflora Hemsl.),但与后者的区别在于它的花冠长约2 cm,花萼裂片三角状卵形和花药基部不具芒状附...     

爵床科一新组合—菲律宾爵床

查阅模式标本后发现Hypoestes pulgarense Elmer的花单生或少数花聚生于叶腋内,并且花药两室,下方一室具矩.这些特征与枪刀药属(Hypoestes)聚伞花序及单室花药的特征不符,而与爵床属(Justicia)一致.因此提出一新组合--菲律宾爵床(Justicia pulgarensis(Elmer)C.M.Gao & Y.F.Deng).     

云南植物区系

云南具有丰富的植物区系,现知种子植物240科(裸子植物10科,被子植物230科),1,984属,约13,000种。无论从那一派分类学家的系统或观点来说,云南都有众多的古老或原始的科属。从云南种子植物属15个分布区类型比较分析,云南区系明显是热带性质并且具有丰富的温带成分,热带的属占云南总属数(不包括世界分布属,下同)61.89％,温带的属却占32.19％。中国特有属在云南分布约有83属,占云南总属数4.39％,并占中国特有属224个的37.05％。中国特有属的三个分布中心,有二个部分地分别在云南境内,即滇西北(新特有属中心)和滇东南(古老特有属中心)。云南本身的特有属有:爵床科的宽丝爵床(Haplanthoides),苦苣苔科的翼柱苣苔(Beciopsis)、毛药苣苔(Dasydesmus)、细筒苣苔(Lagarosolen),唇形科的龙老根(Skapanthus),茜草科的丁茜(Trailliaeodoxa)及伞形科的滇细叶芹(Chaerophyllopsis)和昆明芹(Sinodielsia)。     

中国南部爵床科植物小志(续二)

本文报道了中国南部爵床科(Acanthaceae)植物。其中包括四个新种和一个新组合种, 即金长莲Staurogyne sichuanica Lo, 楔叶叉柱花S.longicuncata Lo, 云南叉柱花S.yunnanensis Lo;天目山蓝Peristrophe tianmuensis Lo和省州赛爵床Colo-phanoides kouytcheensis(Levi.)Lo.     

硫污染对9种园林植物叶片硫含量与叶绿素荧光参数的影响

对深圳市9种园林植物叶片硫含量,以及硫处理对叶片光合作用参数的影响进行了初步研究。这9种植物分别为红背桂(Excoccaria cochinchinensis)、黄脉爵床(Sanchezia nobilis)、大叶变叶木(Codiaeum variegatum)、基及树(Saruma henryi)、短穗鱼尾葵(Caryota mitis)、小叶榕(Ficus microcarpa var.pusillifolia)、高山榕(Ficus altissima)、海桐(Pittosporum tobira)和黄叶假连翘(Duranta repenscv.\'Dwarf Yellow\')。在温度25℃条件下分别在光照和黑暗条件,用NaHSO₃和蒸馏水浸泡各植物叶圆片24h,共形成4种处理。采用PAM-2100荧光仪测定叶绿素荧光参数。在自然状况下采集的黄脉爵床叶片含硫量最高,远高于其他植物,具有较高的富集能力,含量最低的是大叶变叶木。用蒸馏水浸泡后,9种植物叶片的硫含量的变化很少。在NaHSO₃处理下,有7种植物叶片的硫含量显著提高,增加最多的是自然条件下富集能力最低的大叶变叶木。[0]取自不同大气SO₂污染环境的被测试植物显示,除海桐外,小南山的其它8种植物叶片含硫量都大于世博园植物叶片的含硫量。小南山9种植物的F_v/F_m值也都低于世博园,说明在污染较严重的情况下可以通过测定植物叶片的F_v/F_m值来进行现场监测。     

爵床科赤水纤穗爵床的订正

经证实最近发表的赤水纤穗爵床实为钟花草之同物异名,在此予以订正.     

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.