印度瘿蚊六新种(双翅目:瘿蚊科)

本种近似菲律宾一种稷(Panicum carinatum)上的Lasioptera paniculi Felt,但触角的节数不同,雌18节,雄16节;雌触角各节的比例不同而较短;抱器基节中等粗,端节较细。其雌触角18节也相似于印度一种稷Panicum fluitans上的L.flui-tans Felt,但触角第五节远比端节长,产卵器短得多。     

松脂瘿蚊属一新种：双翅目：瘿蚊科

松脂瘿蚊属Cecidomyia全世界已知12种,9种分布在北美和古巴,2种在欧洲,估计1或2种分布在喜马拉雅地区,此属幼虫主要取食松类枝条的树脂,有时为害球果,导致枝消或球果畸形,有的形成虫瘿;在北美寄生于多种松树,在欧洲除松类外还寄居于云、冷杉。本文报道的一新种以云南松Pinus yunnanensis Franch.为寄主。     

中国垫瘿蚊属研究(双翅目：瘿蚊科)

记述了双翅目瘿蚊科一中国新记录属垫瘿蚊属 Conarete Pritchard 的4 种,其中包括2新种： 短须垫瘿蚊 C. brevipalpa Li et Bu, sp. Nov.（模式产地： 海南尖峰岭）和葫茎垫瘿蚊 C. sicyoidea Li et Bu, sp. Nov.（模式产地：海南尖峰岭）; 另外2种为在中国首次记录的种： 米垫瘿蚊 C. mihijamensis Grover （分布：海南尖峰岭）和印垫瘿蚊 C. indorensis Grover（分布：陕西周至板房子）。文中给出了垫瘿蚊属与近缘的短角瘿蚊属Anarete Haliday的区别特征和中国种类分种检索表。模式标本均保存于南开大学生物学系昆虫标本室。     

中国瘿蚊一新种记述(双翅目,瘿蚊科)

记述采自浙江省的端突瘿蚊属Epidiplosis 1新种:指状端突瘿蚊Epidiplosis dactylina sp.nov,.模式标本存放于山东农业大学昆虫标本室.     

食蚜瘿蚊研究进展

<正> 食蚜瘿蚊Aphidoletes aphidimyza(Rond.)是蚜虫的一种专一捕食性天敌,可以取食61种不同作物上的蚜虫(Harris,1973),其中包括许多种重要的农业害虫。早在1916年,Davis就指出食蚜瘿蚊是蚜虫的一种具有很大潜在价值的生防控制因子。70年代初,联邦德国、苏     

柽柳瘿蚊研究初报

<正> 柽柳是西北地区湿润盐碱地、河滩冲积地以及干旱沙荒地的优良造林树种,在甘肃中部祖厉河苦水碱滩、河西走廊沙荒碱滩地分布甚广,生长茂盛。柽柳在抗病虫害方面也表现优     

树瘿蚊亚科中国新纪录种：双翅目：瘿蚊科

约氏短角瘿蚊 Anarete johnsoni(Felt 1908) 中国新纪录。 采集地点:甘肃(文县),四川(理县,汶川)。 国外分布:亚洲(日本),欧洲,北美。     

中国锥瘿蚊属研究(双翅目：瘿蚊科)

记述了中国新纪录属,锥瘿蚊属Pseudoperomyia Jaschhof et Hippa一新种：鹦铗锥瘿蚊Pseudoperomyia psittacephala Li et Bu,sp.nov.,（正模产地：福建武夷山桐木）,及1中国新纪录种：小锥瘿蚊P.humilis Jaschhof et Hippa.（云南云龙）。新种与分布于马来西亚的Pseudoperomyia platystyla Jaschhof et Hippa相近,主要区别为新种生殖基节内突的根部很长;生殖端节形似鹦鹉头的外形;阳茎基钟罩形,中部不缢缩;生殖杆更长。模式标本4均保存于南开大学生物系昆早标本室。     

蘑菇瘿蚊研究初报

<正> 蘑菇是福建农村社队和社员家庭的重要副业之一,又是重要的出口物资。福州地区,1966年开始栽培蘑菇约8万平方尺和试制罐装蘑菇,至1979年巳发展到2,200万平方尺左右。但是,近几年来遭受蘑菇瘿蚊Mycophila fungic-     

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.