西藏钝果寄生属（桑寄生科）二新变种

盐井钝果寄生新变种Ｔａｘｉｌｕｓｄｅｌａｖａｙｉ（ＶａｎＴｉｅｇｈ．）ＤａｎｓｅｒｖａｒｙａｎｊｉｎｇｅｎｓｉｓＷ．Ｌ．Ｃｈｅｎｇ,ｖａｒｎｏｖ．Ａｖａｒ．ｄｅｌａｖａｙｏｄｉｆｅｒｔｐｅｄｉｃｅｌｏｂｒｅｖｉ（１５～２ｍｍｌｏｎｇｏ）,ｌｏｂｏ...     

大花珍珠菜一新变种

短雄大花珍珠菜新变种图１ＬｙｓｉｍａｃｈｉａｖｉｏｌａｓｃｅｎｓＦｒａｎｃｈ．ｖａｒ．ｂｒｅｖｉｓ－ｔａｍｉｎａＹ．Ｙ．Ｑｉａｎ,ｖａｒ．ｎｏｖ．Ａｖａｒ．ｖｉｏｌａｓｃｅｎｔｉｄｉｆｅｒｔｃａｕｌｅｓｕｐｅｒｎｅｒａｍｉ ｆｉｃａｎｔｉ,ｆｏｌｉｓ...     

青海岩黄芪属二新变种

１．伞锥岩黄芪新变种ＨｅｄｙｓａｒｕｍａｌｇｉｄｕｍＬ．Ｚ．Ｓｈｕｅｖａｒ．ｔｈｙｒｓｕｍＹ．Ｈ．Ｗｕ,ｖａｒ．ｎｏｖ．Ａｖａｒ．ａｌｇｉｄｏｒｅｃｅｄｉｔｇｌｏｂｉ－ｔｕｂｅｒｉｓｎｕｌｉｓ,ｍａｘｉｍｉｓｖａｒｉｅｉｎｇｌｏｒｅｓｃｅｎｔｉｓｒａ...     

发根土壤杆菌对葛属药用植物的遗传转化

葛根是传统中药。利用发根土壤杆菌（Ａｇｒｏｂａｃｔｅｒｉｕｍ ｒｈｉｚｏｇｅｎｅｓ （Ｒｉｋｅｒ ｅｔ ａｌ．）Ｃｏｎｎ）Ｒ１６０１转化野葛（Ｐｕｅｒａｒｉａ ｌｏｂａｔａ（Ｗｉｌｌｄ．）Ｏｈｗｉ）、山葛（Ｐ．ｌｏｂａｔａ ｖａｒ．ｍｏｎｔａｎａ）和三裂叶野葛（Ｐ．ｐｈａｓｅｏｌｏｉｄｅｓ（Ｒｏｘｂ．）Ｂｅｎｔｈ．）离体叶片,在叶片表面直接形成毛状根。毛状根的诱导频率分别为１６．６％、１６．２％和     

卡颖蜡蝉属Caristianus Distant中国种类记述（同翅目：颖蜡蝉科）

卡颖蜡蝉属ＣａｒｉｓｔｉａｎｕｓＤｉｓｔａｎｔ中国种类记述（同翅目：颖蜡蝉科）周尧,袁锋,王应伦（西北农业大学昆虫研究所,陕西省杨陵区７１２１００）关键词同翅目,颖蜡蝉科,卡颖蜡蝉属,新种,分类学,中国卡颖蜡蝉属ＣａｒｉｓｔｉａｎｕｓＤｉｓｔａｎｔ,...     

西藏报春花属(报春花科)一新变种

凤翔报春①新变种Ｐ．ｓｉｎｏｐｌａｎｔａｇｉｎｅａＢａｌｆ．ｆ．ｖａｒ．ｆｅｎｇｘｉａｎｇｉａｎａＷ．Ｌ．Ｚｈｅｎｇ，ｖａｒ．ｎｏｖ．Ａｖａｒ．ｓｉｎｏｐｌａｎｔａｇｉｎｅａｒｅｃｉｄｉｔｆｏｌｉｓｍａｊｏｒｉｂｕｓ，１２～１９ｃｍｌｏｎｇｉｓ，１?..     

赖草属资料

禾本科赖草属二新种及一新变种,即芒颖赖草Ｌｅｙｍｕｓ ａｒｉｓｔｉｇｌｕｍｕｓ Ｌ．Ｂ．Ｃａｉ,伊吾赖草Ｌｅｙｍｕｓ ｙｉｗｕｅｎｓｉｓ Ｌ;Ｂ．Ｃａｉ ｅｘ Ｎ．Ｒ．Ｃｕｅ和疏节赖草Ｌｗｅｙｍｕｓ ｓｅｃａｌｉｎｕｓ ｖａｒ。ｌａｘｉｎｏｄｉｓ Ｌ．Ｂ。Ｃａｉ。     

连云港沿岸线海底质中的有孔虫分布及对沉积环境的指示

据２９个底质样中４４个主要有孔虫属种,运用Ｑ型聚类分析,连云港沿岸线海海底表层沉积中有孔虫可划分为二个组合：Ａ．Ａｍｍｏｎｉａ ｂｅｃｃａｒｉｉ ｖａｒｓ．－Ｅｌｐｈｉｄｉｎｍ ｍａｇｅｌｌａｎｉｃｕｍ组合;Ｂ．Ａｍｍｏｎｙａ ｂｅｃｃａｒｉｉ ｖａｒｓ．－Ｔｅｘｔｕｌａｒｉａ ｆｏｌｉａｃｅａ组合。其分布主要受研究区水团控制,可分别代表苏北沿岸流起始段和黄海水团边缘水体的有孔虫组合。以有孔虫为指     

西藏毛茛科新分类群

１色季拉毛茛新变种ＲａｎｕｎｃｕｌｕｓｈｉｒｔｅｌｕｓＲｏｙｌｅｖａｒ．ｓｉｇｙｉｌａｉｃｕｓＷ．Ｌ．Ｃｈｅｎｇ,ｖａｒ．ｎｏｖ．Ａｖａｒ．ｈｉｒｔｅｌｏｄｉｆｅｒｔｆｏｌｉｓｂａｓａｌｉｂｕｓｍｉｎｏｒｉｂｕｓ,ｌａｍｉｎｉｓｃ．２．５ｃｍｄｉａｍ...     

中国顶丝藻科（Acrochaetiaceae）新记录Ⅱ

继续报导中国顶丝藻科新记录６种。柯狄旋体藻Ａｕｄｏｕｉｎｅｌａｃｏｄｉ,栖松旋体藻Ａ．ｃｏｄｉｃｏｌａ,半露旋体藻Ａ．ｅｍｅｒｇｅｎｓ,紫色旋体藻Ａ．ｐｕｒ－ｐｕｒｅａ,疏枝旋体藻Ａ．ｒｙｕｋｙｕｅｎｓｅ,桑托旋体藻Ａ．ｓａｎｃｔｉ－ｔｈｏｍａｅ。     

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.     

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.     

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.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.