Structural Analysis of rbcL Gene from an Endangered Plant，（Acanthopanax brachypus）

ＳｔｒｕｃｔｕｒａｌＡｎａｌｙｓｉｓｏｆｒｂｃＬＧｅｎｅｆｒｏｍａｎＥｎｄａｎｇｅｒｅｄＰｌａｎｔ,（Ａｃａｎｔｈｏｐａｎａｘｂｒａｃｈｙｐｕｓ）ＹＡＮＨｕａ－ｊｕｎ（严华军）;ＺＨＵＣｈｅｎｇ（朱）;ＷＵＮａｉ－ｈｕ（吴乃虎）（Ｉｎｓｔｉｔｕｔｅｏ...     

A Protein Extracted from Mouse Sperm That Plays an Important Role in Fertilization

ＡＰｒｏｔｅｉｎＥｘｔｒａｃｔｅｄｆｒｏｍＭｏｕｓｅＳｐｅｒｍＴｈａｔＰｌａｙｓａｎＩｍｐｏｒｔａｎｔＲｏｌｅｉｎＦｅｒｔｉｌｉｚａｔｉｏｎＺＨＵＡＮＧＤａ－ｚｈｏｎｇ;（庄大中）,ＺＨＡＮＧＴｉａｎ－ｙｉｎ（张天荫）,ＣＨＥＮＤａ－ｙｕａｎ;（陈大...     

Inhibition of Acrosomal Enzymes by Gossypol Is Related to Its Antifertility Action

ＩｎｈｉｂｉｔｉｏｎｏｆＡｃｒｏｓｏｍａｌＥｎｚｙｍｅｓｂｙＧｏｓｓｙｐｏｌＩｓＲｅｌａｔｅｄｔｏＩｔｓＡｎｔｉｆｅｒｔｉｌｉｔｙＡｃｔｉｏｎＹＵＡＮＹｕ－ｙｉｎｇ;（袁玉英）ＺＨＡＮＧＹａｎ－ｌｉｎ;（张燕林）ＳＨＩＱｉ－ｘｉａｎ（石其贤）（Ｚｈｅ...     

十字苣苔属一新记录种

十字苣苔属一新记录种朱华,王洪,李保贵（中国科学院西双版纳热带植物园,云南勐腊６６６３０３）ＳＴＡＵＲＡＮＴＨＥＲＡ,ＡＮＥＷＲＥＣＯＲＤＦＲＯＭＣＨＩＮＡ￥ＺＨＵＨｕａ;ＷＡＮＧＨｏｎｇ;ＬＩＢａｏ－Ｇｕｉ（ＸｉｓｈｕａｎｇｂａｎｎａＴｒｏｐｉｃａ...     

GENUS ANTROPHYUM KAULF.FROM CHINA AND NEIGHBORING REGIONS

ＧＥＮＵＳＡＮＴＲＯＰＨＹＵＭＫＡＵＬＦ．ＦＲＯＭＣＨＩＮＡＡＮＤＮＥＩＧＨＢＯＲＩＮＧＲＥＧＩＯＮＳＸ．Ｃ．ＺＨＡＮＧ（Ｔｈｅｈｅｒｂａｒｉｕｍ（ＰＥ）,ＩｎｓｔｉｔｕｔｅｏｆＢｏｔａｎｙ,ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ,Ｂｅｉ...     

云南蕨类植物区系新记录（Ⅰ）

云南蕨类植物区系新记录（Ⅰ）陆树刚,张光飞（云南大学生态学与地植物学研究所,昆明６５００９１）ＮＥＷＲＥＣＯＲＤＳＴＯＴＨＥＰＴＥＲＩＤＯＦＬＯＲＡＯＦＹＵＮＮＡＮ（Ⅰ）￥ＬＵＳｈｕ－Ｇａｎｇ;ＺＨＡＮＧＧｕａｎｇ－Ｆｅｉ（ＩｎｓｔｉｔｕｔｅｏｆＥｃ...     

长蠹科一中国新记录属

长蠹科一中国新记录属ＡＮＥＷＲＥＣＯＲＤＧＥＮＵＳＯＦＢＯＳＴＲＩＣＨＩＤＡＥ（ＣＯＬＥＯＰＴＥＲＡ）ＦＲＯＭＣＨＩＮＡ￥ＺＨＡＮＧＱｉｎｇｈｅ;ＣＨＵＤｏｎｇ;ＹＡＮＧＹｏｎｇｆｕ（ＧｅｎｅｒａｌＳｔａｔｉｏｎｏｆＦｏｒｅｓｔＩｎｓｅｃｔａｎｄＤｉ...     

紫堇属新分类群

紫堇属新分类群吴征镒苏志云庄璇（中国科学院昆明植物研究所，昆明６５０２０４）ＮＥＷＴＡＸＡＯＦＣＯＲＹＤＡＬＩＳＷＵＺｈｅｎｇ－Ｙｉ（Ｃ．Ｙ．Ｗｕ），ＳＵＺｈｉ－Ｙｕｎ，ＺＨＵＡＮＧＸｕａｎ（Ｈ．Ｃｈｕａｎｇ）（ＫｕｎｍｉｎｇＩｎｓｔｉｔｕｔｅｏｆ...     

河南紫荆属订正

河南紫荆属订正朱长山，李学德（河南农业大学，郑州４５０００２）（郑州师范学校，郑州４５００５２）ＡＲＥＶＩＳＩＯＮＯＦＣＥＲＣＩＳＦＲＯＭＨＥＮＡＮ￥ＺＨＵＣｈａｎｇ－Ｓｈａｎ；ＬＩＸｕｅ－Ｄｅ（ＨｅｎａｎＡｇｒｉｃｕｌｔｕｒａｌＵｎｉｖｅｒｓｉｔｙ...     

Effect of Plant AntifreezeProteins on Porcine Embryo to Cryopreservaton

ＥｆｆｅｃｔｏｆＰｌａｎｔＡｎｔｉｆｒｅｅｚｅＰｒｏｔｅｉｎｓｏｎＰｏｒｃｉｎｅＥｍｂｒｙｏｔｏＣｒｙｏｐｒｅｓｅｒｖａｔｏｎ￥ＦＥＩＹｕｎ－ｂｉａｏ（费云标）;ＷＥＩＬｉｎｇ－ｂｏ（魏令波）;ＧＡＯｓｕ－ｑｉｎ（高素琴）;ＺＨＡＯＳｈｕ－ｈｕｉ（赵...     

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