有棱丝瓜的组织培养及快速繁殖

1　植物名称　有棱丝瓜 (Ｌｕｆｆａａｃｕｔａｎｇｕｌａ)品种“绿旺”。2　材料类别　真叶、下胚轴、上胚轴及胚芽。3　培养条件　基本培养基为 ( 1 )ＭＳ。诱导愈伤组织培养基 :( 2 )ＭＳ 6 ＢＡ 5ｍｇ·Ｌ- 1 (单位下同 ) ＮＡＡ 0 .5。诱导胚性愈伤组织及分化培养基 :( 3)ＭＳ 6 ＢＡ 2 ＩＡＡ 0 .2 ＩＢＡ 0 .2。胚性愈伤组织继代增殖培养基 :( 4 )ＭＳ 6 ＢＡ 4 ＫＴ0 .5 ＮＡＡ 1。生根培养基 :( 5 ) 1 /2ＭＳ ＩＡＡ 0 .2。以上培养基 ｐＨ均为 5 .8。糖浓度在培养基 ( 1 )、( 2 )、( 4 )、( 5 )中为 3% ,在培养基 ( 3)…     

球茎海棠的叶片培养与快速繁殖

1　植物名称　球茎海棠 (Ｂｅｇｏｎｉａｔｕｂｅｒｈｙ ｂｒｉｄａ)。2　材料类别　叶片。3　培养条件　以ＭＳ培养基为基本培养基。不定芽诱导与增殖培养基附加 :( 1 ) 6 ＢＡ 3ｍｇ·Ｌ-1(单位下同 ) ;( 2 ) 6 ＢＡ 1 ＩＡＡ 0 .1。愈伤组织与不定芽诱导培养基附加 :( 3) 6 ＢＡ 3 ＮＡＡ 1 ;( 4) 6 ＢＡ 1 ＮＡＡ 3;( 5 ) 6 ＢＡ3 ＮＡＡ 3。生根培养基附加 :( 6 )ＮＡＡ 0 .1 ;( 7)ＮＡＡ 1。上述培养基均加 0 .8%琼脂和3%蔗糖 ,ｐＨ 5 .8。培养温度 ( 2 3± 2 )℃ ,每天光照 1 2ｈ ,光照度 1 2 0 0ｌｘ。4　生长与分化情况4.1…     

刺槐宽叶和四倍体无性系的组织培养

１植物名称刺槐（Ｒｏｂｉｎｉａｐｓｅｕｄｏａｃａｃｉａ）优良无性系：Ｔｅｔｒａｐｌｏｉｄｌｏｃｕｓｔ、Ｇｌｇａｓｔｙｐｅｌｏｃｕｓｔ。２材料类别带腋芽的茎段。３培养条件（１）启动培养基：ＭＳ＋６－ＢＡ０．２５ｍｇ·Ｌ－１（单位下同）＋ＮＡＡ０．０５。（２）分化培养基和继代培养基：ＭＳ＋６－ＢＡ０．５＋ＮＡＡ０．１＋ＡｇＮＯ３１０,ＭＳ＋６ＢＡ０．５＋ＮＡＡ０．１。上述培养基均添加３％蔗糖、０．６％琼脂。（３）生根培养基：１／２ＭＳ＋ＩＢＡ０．２＋ＮＡＡ０．２,添加２％蔗糖０．６％琼脂。培养基ｐＨ…     

高寒藏药—抱茎獐牙菜组织培养研究及其愈伤组织有效成分的测定

从抱茎獐牙菜的胚轴、幼叶及未成熟种子诱导出愈伤组织并再生植株,试验选用ＭＳ、Ｂ５和Ｎ６三种培养基,其中以附加２．４－Ｄ３．０ｍｇ／Ｌ＋６－ＢＡ０．５ｍｇ／Ｌ的ＭＳ培养基诱导率最高;以附加６－ＢＡ０．５ｍｇ／Ｌ＋ＮＡＡ０．２ｍｇ／Ｌ的ＭＳ培养基分化苗频率最高;以附加２．４－Ｄ２．０ｍｇ／Ｌ＋６－ＢＡ０．５ｍｇ／Ｌ的ＭＳ培养基愈伤组织的生长最好。结果表明,外植体,培养基,激素等对愈伤组织诱导、继代和分化均有明显影响。采用高压液相色谱法（ＨＰＬＣ）测定抱茎獐牙菜愈伤组织中齐墩果酸含量的结果表明,愈伤组织中齐果墩酸含量因培养基、继代培养时间的不同而有所差异     

金红花的组织培养快速繁殖研究

金红花顶芽或腋芽培养在ＭＳ基本培养基中。研究植物激素及培养基的物理性质对器官形成的影响。试验结果表明：芽增殖培养基以附加ＢＡ１．０ｍｇ／ｌ和ＮＡＡ０．２ｍｇ／ｌ为好。生根培养基为１／２ＭＳ＋ＮＡＡ０．１ｍｇ／１。糊状培养基有利于苗的生长,试管有根苗和无根苗移栽均获得高的成活率。     

赞皇大枣的组织培养

1　植物名称　赞皇大枣 (Ｚｉｚｙｐｈｕｓｊｕｊｕｂａｃｖ Ｚａｎ ｈｕａｎｇ)。2　材料类别　茎尖和带腋芽的茎段。3　培养条件　 (1 )启动培养基 :ＭＳ 6 ＢＡ 0 5ｍｇ·Ｌ- 1 (单位下同 ) ＮＡＡ 0 0 5。 (2 )分化培养基和继代培养基 :ＭＳ 6 ＢＡ 3 5 ＮＡＡ 0 1 ,ＭＳ 6 ＢＡ 1 5 ＮＡＡ 0 1 ,上述培养基均添加 3 %蔗糖 ,0 6 %琼脂。 (3 )生根培养基 :1 /2ＭＳ ＩＢＡ 0 8 ＮＡＡ 0 2 ,添加 2 %蔗糖 ,0 6 %琼脂。培养基ｐＨ值为 6 0 ,培养温度 (2 7± 2 )℃ ,光照度 2 0 0 0ｌｘ,光照时间 1 2ｈ·ｄ- 1 。4　生…     

非洲菊组织培养与快速繁殖

植物名称　非洲菊 (Ｇｅｒｂｅｒａｊａｍｅｓｏｎｉｉ) ,又名扶郎花。2　材料类别　黄色和玫瑰红色的花托。3　培养条件　以 1 / 2ＭＳ(大量元素和微量元素减半 )和ＭＳ为基本培养基。诱导培养基附加 :(1 ) 6 ＢＡ1 0ｍｇ·Ｌ-1(单位下同 ) ＮＡＡ1 .0 ,(2 ) 6 ＢＡ 7 ＮＡＡ 0 .7,(3) 6 ＢＡ 5 ＮＡＡ0 .5 ,(4) 6 ＢＡ 2 ＮＡＡ 0 .2 ;增殖培养基 :ＭＳ 6 ＢＡ 0 .1～ 0 .5 ＮＡＡ 0 .0 1～ 0 .0 5 ;生根培养基 :ＭＳ。上述培养基均为固体培养基 ,3%蔗糖、0 .4%琼脂粉 ,ｐＨ 5 .8,培养温度(2 5± 2 )℃ ,光照 1 2～ 1 4ｈ·ｄ…     

菊苣花瓣的组织培养

1　植物名称　菊苣 (Ｃｉｃｈｏｒｉｕｍｉｎｔｙｂｕｓ)。凭证标本藏于石河子大学标本室。2　材料类别　野生植株的幼嫩花瓣。3　培养条件　基本培养基为ＭＳ。 ( 1 )诱导愈伤组织培养基 :ＭＳ 6 ＢＡ 3.0ｍｇ·Ｌ- 1 (单位下同 ) ＮＡＡ 0 .5 ;( 2 )诱芽培养基 :ＭＳ 6 ＢＡ 3.0 ＮＡＡ0 .0 1 ;( 3)继代增殖培养基 :ＭＳ 6 ＢＡ 1 .0 ;( 4 )生根培养基 :ＭＳ ＩＡＡ 0 .1。基本培养基中琼脂为0 .65 % ;生根培养基中蔗糖为 2 % ,其余为 3% ;ｐＨ6.0 ,温度 2 5～ 2 8℃ ;每天光照 1 2ｈ ,光照度 1 0 0 0～1 5 0 0ｌｘ。4　生长与分…     

地被菊的组织培养及快速繁殖

1　植物名称　地被菊 (Ｄｅｎｄｒａｎｔｈｅｍａｇｒａｎｄｉｆｌｏｒｕｍ)品种早小菊。2　材料类别　花蕾。3　培养条件　以ＭＳ为基本培养基。愈伤组织诱导及分化培养基 :(1 )ＭＳ 6 ＢＡ 2ｍｇ·Ｌ-1(单位下同 ) ＮＡＡ 0 .2。继代培养基 :(2 )ＭＳ ＮＡＡ 0 .2 ;(3 )ＭＳ 6 ＢＡ 0 .0 2 ＮＡＡ 0 .2 ;(4)ＭＳ 6 ＢＡ 2 ＮＡＡ 0 .2。生根培养基 :(5 ) 1 2ＭＳ 6 ＢＡ 0 .0 2 ＩＢＡ 1 ;(6 ) 1 2ＭＳ ＩＢＡ 1 ;(7) 1 2ＭＳ ＩＢＡ 2 ;(8) 1 2ＭＳ ＩＢＡ 3。上述培养基均添加 2 %蔗糖 ,0 .7%琼脂。培养基ｐＨ为 6 …     

粗壮女贞的组织培养与快速繁殖

1　植物名称　粗壮女贞 (Ｌｉｇｕｓｔｒｕｍｒｏｂｕｓｔｕｍ) ,又名“苦丁茶”。2　材料类别　胚、下胚轴。3　培养条件　基本培养基 :Ｌｌｏｙｄ和ＭｃＣｏｗｎ培养基 (Ｌｌｏｙｄ ,1 980 ) 蔗糖 1 5 % 琼脂 0 8% (以下简称ＬＭｃ)。胚萌发培养基 :(1 )ＬＭｃ 6 ＢＡ 0 5ｍｇ·Ｌ- 1 (单位下同 ) ＮＡＡ 0 1 ＧＡ 0 1 ;(2 )ＬＭｃ 6 ＢＡ1 0。愈伤组织诱导培养基 :(3 )ＬＭｃ 6 ＢＡ 1 0 2 ,4 Ｄ 0 4。芽分化培养基 :(4)ＬＭｃ 6 ＢＡ 2 0 ＩＢＡ 0 0 2。芽增殖培养基 :(5 )ＬＭｃ 6 ＢＡ 0 4 ＮＡＡ 0 0 2 …     

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.     

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).     

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.