河南角姬蜂属二新种 （膜翅目：姬蜂科）

 报道了采自河南的角姬蜂属Cosmoconus Foerster 二新种：西峡角姬蜂 C. xixiaens is Sheng, sp.nov. 和斑角姬蜂C. maculiventris Sheng, sp.nov.,并指出了与近 似种的主要区别特征。     

河南角姬蜂属二新种（膜翅目：姬蜂科）

报道了采自河南的角姬蜂属Cosmoconus Foerster 二新种：西峡角姬蜂 C. xixiaensis Sheng, sp.nov. 和斑角姬蜂C. maculiventris Sheng, sp. nov.,并指出了与近似种的主要区别特征。     

中国兜姬蜂属分类研究(膜翅目,姬蜂科)

报道兜姬蜂属Dolichomitus Smith 1新种:嵩兜姬蜂Dolichomitus songxianicus Sheng,sp.nov.及中国2新纪录种:头兜姬蜂D.cephalotes(Holmgren)、卡西兜姬蜂D.khasianus Gupta et Tikar.编制了中国已知的14种2亚种检索表.     

短颚姬蜂属和棒角姬蜂属在中国首次发现并记述一新种(膜翅目,姬蜂科)

报道发现于我国的两个新纪录属,短颚姬蜂属Skiapus Morley,1917和棒角姬蜂属Hellwigia Gravenhorst,1823的种类:黑短颚姬蜂Skiapus niger Sheng,sp.nov.和暗棒角姬蜂Hellwigia obscura Gravenhorst,1823.编制了这2属的分种检索表.     

寄生柳丝叶蜂的卷唇姬蜂属一新种（膜翅目：姬蜂科）

报道寄生天水柳丝叶蜂Nematus sp．的姬蜂科1新种：突角卷唇姬蜂Aptesis corniculata Sheng,sp．nov.,模式标本存国家林业局森林病虫害防治总站。     

寄生榆童锤角叶蜂的姬蜂种类研究(膜翅目,姬蜂科)

报道2种寄生榆童锤角叶蜂Agenocimbex elmina Li et Wu的姬蜂,其中1种为新种:天水镶颚姬蜂Hyposotertianshuiensis Sheng,sp.nov.;另一种为已知种:日本欧姬蜂Opheltes japonicus(Cushman,1924).     

中国特姬蜂属种类记述(膜翅目,姬蜂科)

报道我国的特姬蜂属Teleutaea Forster,1869种类,含2新种:赤特姬蜂T.rufa sp.nov.、侧特姬蜂T.pleuralis sp.nov.,4中国新纪录种:角特姬蜂T.corniculata Momoi,1978、小特姬蜂T.diminuta Momoi,1978、东方特姬蜂 T.orientalis Kuslitzky,1973和乌苏里特姬蜂T.ussuriensis(Golovisnin,1928).编制了中国已知种检索表.     

江西发现差齿姬蜂属三新种(膜翅目,姬蜂科,柄卵姬蜂亚科)并附中国已知种检索表

报道在江西发现的差齿姬蜂属Thymaris Frster,1869的种类,其中有3新种:黄足差齿姬蜂Th. flavipedalis sp.nov.,红颈差齿姬蜂Th. ruficollaris sp.nov.,沟差齿姬蜂Th. sulcatus sp. nov.和中国1新纪录种纺差齿姬蜂Th. clotho Morley,1913。指出了新种与近似种的鉴别特征,并附彩色特征图。编制了该属中国已知种的检索表。     

寄生云杉球果卷蛾的姬蜂

报道采自青海省祁连县寄生云杉球果卷蛾Laspeyresia strobilella Linnaeus的3种姬蜂,其中1新种:祁连缺沟姬蜂Lissonota qilianica Sheng,sp.nov.,中国1新纪录:欧松梢小卷蛾曲姬蜂Scambus(Scambus)buolianae(Hartig,1838),对青海汤姬蜂Townesia qinghaiensis He,1996的雌性作了首次描记.标本保存在国家林业局森林病虫害防治总站.     

寄生灰斑古毒蛾的姬蜂(膜翅目,姬蜂科)及一新种记述

报道采集自宁夏和内蒙古、寄生灰斑古毒蛾Orgyia ericae Germar的4种姬蜂:地蚕大铗姬蜂Eutanyacra picta(Schrank)、舞毒蛾黑瘤姬蜂Pimpla disparis Viereck、寡埃姬蜂Itoplectis viduata(Gravenhorst)、古毒蛾歧腹姬蜂Dichrogaster orgyiae Sheng,sp.nov.。介绍了新种和近似种及我国已知种的主要区别特征并附彩色特征图。     

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.     

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     

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.     

Entwicklungsgeschichte und Ultrastruktur von Pollenkitt und Exine bei nahe verwandten entomophilen und anemophilen Angiospermensippen derAlismataceae,Liliaceae, Juncaceae,Cyperaceae, Poaceae undAraceae

Some closely related members of the monocotyledonous familiesAlismataceae, Liliaceae, Juncaceae, Cyperaceae, Poaceae andAraceae with variable modes of pollination (insect- and wind-pollination) were studied in relation to the ultrastructure of pollenkitt and exine (amount, consistency and distribution of pollenkitt on the surface of pollen grains). The character syndromes of pollen cementing in entomophilous, anemophilous and intermediate (ambophilous or amphiphilous) monocotyledons are the same in principal as in dicotyledons. Comparing present with former results one can summarize: 1) The pollenkitt is always produced in the same manner by the anther tapetum in all angiosperm sub-classes. 2) The variable stickiness of entomophilous and anemophilous pollen always depends on the particular distribution and consistency of the pollenkitt, but not its amount on the pollen surface. 3) The mostly dry and powdery pollen of anemophilous plants always contains a variable amount of inactive pollenkitt in its exine cavities. 4) A step-by step change of the pollen cementing syndrome can be observed from entomophily towards anemophily. 5) From the omnipresence of pollenkitt in all wind-pollinated angiosperms studied one can conclude that the ancestors of anemophilous angiosperms probably have been zoophilous (i.e. entomophilous) throughout.

     

Identification and Characterization of the First Equine Parainfluenza Virus 5

正Dear Editor,Parainfluenza virus 5 (PIV5), known as canine parainfluenza virus in the veterinary field, is a negative-sense,nonsegmented, single-stranded RNA virus belonging to the Paramyxoviridae family (Chen 2018). The virus was first reported in primary monkey kidney cells in 1954 (Hsiung1972), then it has been frequently discovered in various