中华沙棘的核型分析

中华沙棘(Hippophae rhamnoides Linn. subsp. sinensis Rousi)属胡颓子科,产我国西北部和西南部,是一种优良的固砂植物。沙棘的果实含多种维生素,是颇具开发价值的保健饮料资源。沙棘属(Hippophae)全世界共4种,细胞学资料仅限     

中国萼潜蝇属研究(双翅目: 潜蝇科)

对中国萼潜蝇属Calycomyza Hendel进行了系统研究。该属在我国现知5种,其中包括一新种,中华萼潜蝇C. chinensis sp. Nov.,及一中国新记录种,一枝黄花萼潜蝇C. Solidaginis(Kaltenbach)。除新种描述并附特征图外, 还提供中国已知种类分种检索表。     

中国肿腿蜂属新记录及一新种记述膜翅目：肿腿蜂科，肿腿蜂亚科）

记述了采自我国辽宁省的肿腿蜂属一新种：中华肿腿蜂Bethylus sinensis Xu, He et Terayama, sp. Nov.,这是我国肿腿蜂属的首次记录。模式标本保存于浙江大学植物保护系寄生蜂标本室。     

伪稻蝗及其近缘属的细胞学分类

本文采用染色体c带核型和银染核仁组成区定位分析方法对我国分布的伪稻蝗属(Pseudoxya)、稻蝗属(Oxya)和卵翅蝗属(Caryanda)进行了细胞学水平的系统分类研究。 结果表明,作为近缘属,此三属在常规核型和c带标志性带纹分布方面显示出一些共同特点, 表明其相互近缘的共性,然而在c带带纹分布型式及核仁组成区定位方面各有其特点,差异明显,这又是其属间相互独立的个性所在。由此,本文探讨了此三属之间细胞水平的分类学关系及该技术在细胞学分类学研究中的应用意义。     

中国北方粉蛉新种及新记录 (脉翅目：粉蛉科)

该文论述了我国北方粉蛉7种,其中卷粉蛉属Helicoconis及污褐卷粉蛉Helicoconis (Helicoconis)lutea为中国新记录,另包括粉蛉属Cxraiopteryx北方粉蛉Coniopteryx(Coniopteryx)arctica sp.nov,、周氏粉蛉Coniopteryx(Oniopteryx)choui,sp.nov.、宽带粉蛉Oniopteryx(Coniopteryx)vittiformis,sp nov.3新种及圣洁粉蛉Coniopteryx Coniopteryx)parthenia(Navas & Marcet,1910)、蒙干粉蛉Coniopteryx(Xeroconiopteryx)mongolica Melnander、爪干粉蛉Onioptery(Xeroconiopteryx)unguigonarcuata Aspock & Aspock 3中国新记录种。     

中国羽角实蝇属分类研究(双翅目: 实蝇科)

对中国实蝇科的羽角实蝇属Gastrozona Bezzi 进行了全面概述和厘订,本属在我国现知共有8种, 其中包括一个新种：汉氏羽角实蝇G. hancochi sp. Nov.;一个中国新记录种：微连羽角实蝇G. soror (Schiner)。附脉羽角实蝇G. appendiculata Zia 以前曾被误作是笋黄羽角实蝇G. fasciventris（Macquart）的同物异名,现提出恢复其种的地位。 除描述新种外,还提供中国羽角实蝇属已知种类的鉴别特征、分种检索表及其特征图。     

云南蚊科三新种 （双翅目：蚊科）

记述了采自云南蚊科3新种,即：蓝带蚊属伪费蚊亚属一新种瞿氏蓝带蚊Uranotaenia (Pseudoficalbia) qui Dong, Dong et Zhou, sp. Nov.,采自西双版纳优乐山竹穴积水中,与新糊蓝带蚊Ur. Novobscura Barraud和二斑蓝带蚊Ur. Bimaculata Leicester近缘;领蚊属一新种类孟连领蚊Heizmannia (Heizmannia) menglianeroides Dong, Dong et Zhou, sp. Nov.,采自云南省景洪县森林竹筒积水中,与孟连领蚊Hz. Menglianensis Lu et Gong, 1986为近缘;库蚊属泰蚊亚属一新种陈氏库蚊Culex (Thaiomyia) cheniDong, Wang et Lu, sp. Nov.,采自云南西北部海拔1795 m的腾冲县竹筒积水,与海南库蚊Cu. (Th.) hainaensis Chen, 1977近缘。讨论了各新种与近缘种的鉴别特征。新种分别存放在云南省疟疾防治研究所和贵阳医学院微生物教研室。     

中国草螟亚科带草螟属、丽草螟属和双带草螟属的研究及带草螟属二新种记述

对中国草螟亚科3个近缘属：带草螟属 Metaeuchromius Bleszynski、丽草螟属Euchromius Guenée和双带草螟属 Miyakea Marumo进行了研究。该3属在中国已记录12个种,包括带草螟属Metaeuchromius两新种：黄色带草螟 M. fulvusalis sp. Nov.,模式产地广西,与褐带草螟 M. circe Bleszynski近缘;灰色带草螟 M. grisalis sp. Nov.,模式产地浙江,与云南带草螟 M. yuennanensis (Caradja)近缘。对新种给出了描述、外生殖器特征图和与近缘种的比较。并提供了带草螟属中国已知种检索表。     

中国二叉蚜属研究及三新种记述(同翅目：蚜科)

本文记述中国二叉蚜属Schizaphis Borner 6种,其中包括3新种：贴梗海棠二叉蚜Schizaphis(Schizaphis)chaenometicola Zhang,sp.nov.,香草二叉蚜Schizaphis(Schizaphis)hierochlophaga Zhanget Chen,sp.nov.和长管二叉蚜Schizaphis(Schizaphis)longituberclata Zhang et Qiao,sp.nov.,并附亚属、种检索表。模式标本存放中国科学院动物研究所标本馆。     

东洋界肘角广口蝇属分类研究及一新种记述（双翅目：广口蝇科）

检视和研究了东洋界肘角广口蝇属Loxoneura Macquart(双翅目：广口蝇科)的全部种类,确认目前该属共知12种。详细记述了其中的一新种：西藏肘角广口蝇L.tibetana sp. Nov.。记载了下列5种的地理分布新记录： 大斑肘角广口蝇L. fascialis Kertesz、三带肘角广口蝇L. livida Hendel和花翅肘角广口蝇L. pictipennis (Walker) 为中国新记录种;艳丽肘角广口蝇L. decora (Fabr icius) 为马来西亚和婆罗洲的新记录种;台湾肘角广口蝇L. formosae Kertesz为印度新记录种。讨论了肘角广口蝇属的属征,并提供全部已知种类（除老挝肘角广口蝇 L. vitalisiana Frey外）的鉴别特征、分种检索表及其有关特征图。     

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.     

鸡传染性法氏囊病病毒研究进展

传染性法氏囊病(Infection bursal disease, IBD)是由鸡传染性法氏囊病毒(Infectious bursal disease virus, IBDV)引起的鸡和火鸡的一种高度接触性传染病,给世界各国的禽养殖业带来了巨大损失.自IBDV发现至今新的变异株不断出现,分子结构的改变导致病毒致病力的改变及宿主对疫苗应答的改变,使得传统的疫苗已不能控制其流行,因此各国学者对其基因组结构和功能进行了广泛深入的研究,并积极研制新型有效的疫苗以达到防治的目的.     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.