分支系统学简评

分支系统学简评冷琴（中国科学院南京地质古生物研究所,南京２１０００８）周巍（南京市玄武区花园路,南京２１００３７）１前言分支（支序）系统学（Ｃｌａｄｉｓｔｉｃｓ,Ｃｌａｄｉｓｔｉｃｓｙｓｔｅｍａｔｉｃｓ）,又称系统发育分类学（ｐｈｙｌｏｇｅｎｅｔｉｃ...     

盐生隐杆藻胞外多糖含量的影响因子

盐生隐杆藻胞外多糖含量的影响因子欧瑜刘志礼（南京农业大学理学院生化室,南京２１００９５）（南京大学生物科学与技术系,南京２１００９３）ＳｅｖｅｒａｌｆａｃｔｏｒｓｉｎｆｌｕｅｎｃｉｎｇｅｘｏｐｏｌｙｓａｃｃｈａｒｉｄｅｃｏｎｔｅｎｔｓｏｆＡｐｈａｎｏ...     

杨树护田林带疏透度模型及应用

杨树护田林带疏透度模型及应用张纪林,吕祥生（江苏省林业科学研究所,南京２１１１５３）（江苏省农林厅林业局,南京２１１１５３）ＰｏｒｏｓｉｔｙＭｏｄｅｌｏｆＰｏｐｌａｒＦａｒｍｌａｎｄＳｈｅｌｔｅｒｂｅｌｔａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎ￥ＺｈａｎｇＪｉｌｉｎ（Ｆｏｒｅｓｔｒｙｓｃｉｅｎｃｅａｎｄｔｅｃｈ－ｎｏｌｏｇｙｒｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＪｉａｎｇｓｕ）,ＬｕＸｉａｎｇｓｈｅｎｇ（ＦｏｒｅｓｔｒｙＢｕｒｅａｕ“ｏｆＪｉａｎｇｓｕＰｒｏｖｉｎｃｅ）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（５）：５６－６０。Ｉｎｔｈｉｓａｒｔｉｃｌｅ,ｔｈｅａｕｔｈｏｒｓａｔｆｉｒｓｔｍａｄｅｔｈｒｅｅ－ｐｒｉｎｃｉｐｌｅｄｓｅｌｅｃｔｉｏｎ,ｐａｒｔｉａｌｃｏｒｒｅｌａｔｉｏｎ,ｂｅｓｔｍｕｌｔｉ－ｐｒｉｎ－ｃｉｐｌｅｒｅｇｒｅｓｓｉｏｎｓｅｌｅｃｔｌｏｎｉｎｓｅｑｕｅｎｃｅ,Ｓｅｃｏｎｄｌｙｏｎｔｈｅｂａｓｉｓｏｆｒｅｓｉｄｕａｌａｎａｌｙｓｉｓ,ｔｈｅａｕｔｈｏｒｓｍａｄｅｔｅｓｔｏｆｈｉｇｈｌｅｖｅｒａｇｅｃａｓｅ,ｉｎｆｌｕｅｎｃｅｃａｓｅａｎｄｏｕｔｌｉｅｒｏｎｓａｍｐｌｅ     

棒毛荠属属名的考证及其属模式学名的订正

棒毛荠属属名的考证及其属模式学名的订正陆莲立（江苏省植物研究所,南京２１００１４）（中国科学院植物研究所,南京２１００１４）ＴｈｅｉｄｃｎｔｉｆｉｃａｔｉｏｎａｎｄｒｅｖｉｓｉｏｎｏｎｔｈｅｇｅｎｕｓＣｏｃｈｌｅａｒｉｏｐｓｉｓＹ．Ｈ．Ｚｈａｎｇａｎ...     

作物对太阳紫外线辐射增加的生物效应及其评估

作物对太阳紫外线辐射增加的生物效应及其评估郑有飞,杨志敏,颜景义,万长建（南京气象学院,南京２１００４４）Ｂｉｏｌｏｇｉｃａｌｒｅｓｐｏｎｓｅｏｆｃｒｏｐｓｏｎｅｎｈａｎｃｅｄｓｏｌａｒｕｌｔｒａｖｉｏｌｅｔｒａｄｉａｔｉｏｎａｎｄｉｔｓｅｓｔｉｍａ...     

工业固体废弃物的急性生物毒性研究

工业固体废弃物的急性生物毒性研究谢思琴,顾宗濂,周德智（中国科学院南京土壤研究所,南京２１０００８）Ａｃｕｔｅｂｉｏｔｏｘｉｃｉｔｙｏｆｉｎｄｕｓｔｒｉａｌｓｏｌｉｄｗａｓｔｅｓ￥．ＸｉｅＳｉｑｉｎ;ＧｕＺｏｎｇｌｉａｎａｎｄＺｈｏｕＤｅｚｈｉ（Ｉｎ...     

杂种鹅掌楸叶解剖结构特征的识别

杂种鹅掌楸叶解剖结构特征的识别叶金山周守标王章荣（南京林业大学森林资源与环境学院,南京２１００３７）ＤｉｓｃｒｉｍｉｎａｔｉｏｎｏｆｌｅａｆａｎａｔｏｍｉｃｓｔｒｕｃｔｕｒｅｏｆｔｈｅＣｈｉｎｅｓｅｔｕｌｉｐｔｒｅｅｈｙｂｒｉｄｓＹｅＪｉｎＳｈａ...     

心叶留兰香的挥发油成分

心叶留兰香的挥发油成分周自新, 桂新（南京市卫生防疫站,南京２１０００３）（安徽中医学院中药系,合肥２３００３８）Ｔｈｅｃｈｅｍｉｃａｌｃｏｍｐｏｎｅｎｔｓｉｎｔｈｅｅｓｓｅｎｔｉａｌｏｉｌｓｆｒｏｍｍｅｎｔｈａｃｏｒｄｉｆｏｌｉａ￥ＺｈｏｕＺｉ－Ｘ?..     

荒漠沙蜥的年龄划分

荒漠沙蜥的年龄划分徐海根（国家环保局南京环境科学研究所,２１００４２）杨凤翔,宋志明（兰州大学,７３００００）（四川大学,成都６１００６４）ＡｇｅＤｉｆｆｅｒｅｎｔｉａｔｉｏｎｏｆＰｈｒｙｎｏｃｅｐｈａｌｕｓｐｒｚｅｗａｌｓｋｉｉｏｎＤｅｓｃｒｔｓ￥．ＸｕＨａｉｇｅｎ（ＮａｎｊｉｎｇＩｎｓｔｉｔｕｔｅｏｆＥｎｕｉｒｏｎ－ｍｅｎｔａｌＳｃｉｅｎｃｅｓ,２１００４２）,ＹａｎｇＦｅｎｇｘｉａｎｇ（ＬａｎｚｈｏｕＵｎｉｕｅｒｓｉｔｙ,７３００００）,ＳｏｎｇＺｈｉｍｉｎｇ（ＳｉｃｈｕａｎＵｎｉｕｅｒ－ｓｉｔｙ,Ｃｈｅｎｇｄｕ６１００６４）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（４）：３０－３２．Ｕｓｉｎｇｍａｒｋ－ｒｅｃａｐｔｕｒｅｍｅｔｈｏｄａｎｄａｃｃｏｒｄｉｎｇｔｏｔｈｅｓｎｏｕｔ－ｖｅｎｔｌｅｎｇｔｈｇｒｏｗｔｈｐａｔｔｅｒｎ,ｆｉｖｅａｇｅｇｒｏｕｐｓｏｆＰｈｒｙ,ｉｏｃｅｐｈａｌｕｓｐｒｚｅｗａｌｓｋｉｉｏｎｄｅｓｅｒｔｓａｒｅｄｉｆｆｅｒｅｎｔｉａｔｅｃｄ．Ａｎｄｂａｓｅｄｏｎｔｈｅｄａｔａｏｆｌｉｚａｒｄｓｍｏｒｐｈｏｌｏ－ｇｙ,ｔｈｅｃｏｍｍｕｎｉｔｙｏｆＰｈｒｙｎｏｃ     

射干和鸢尾的挥发性成分

射干和鸢尾的挥发性成分秦民坚王强徐珞珊徐国钧（中国药科大学,南京２１００３８）田中俊弘（岐阜药科大学,日本国岐阜市５０２）ＶｏｌａｔｉｌｅｃｏｎｓｔｉｔｕｅｎｔｓｏｆＢｅｌａｍｃａｎｄａｃｈｉｎｅｎｓｉｓａｎｄＩｒｉｓｔｅｃｔｏｒｕｍＱｉｎＭｉｎＪ...     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

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.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

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