美国红栌的组织培养和快速繁殖

1植物名称美国红栌(Cotinus coggygria‘Royal purple'). 2材料类别嫩茎段、茎尖. 3培养条件(1)启动培养基:MS 6-BA 0.2 mg·L-1(单位下同) NAA 0.05 3%蔗糖;(2)增殖培养基:MS 6-BA 0.5 NAA 0.1 3%蔗糖;(3)壮苗培养基:MS NAA 0.1 3%蔗糖;(4)生根培养基:1/2MS IBA 1.0 NAA 0.1 PP3332.0 2%蔗糖.以上培养基均加0.7%琼脂,pH 5.8～6.0.培养温度为(25±2)℃,光照12 h·d-1,光照度为2 000lx.     

金叶接骨木的组织培养和快速繁殖

1植物名称金叶接骨木(SambuCus racemosa ‘Plumosa aurea'). 2材料类别茎尖、茎段. 3培养条件芽诱导培养基:(1)MS NAA 0.2 mg·L-1(单位下同) 6-BA 1.0,(2)MS NAA 0.4 6-BA 1.0,(3)MS IBA 0.2,(4)1/2MS(大量元素1/2) IA 0.2;生根培养基:(5)MS NAA 0.4,(6)1/2MS NAA 0.2,(7)1/2MS IBA 0.2.以上培养基均加入6 g·L-1琼脂粉,pH 5.8.培养基(1)、(2)、(5)和(6)中含30g·L-1蔗糖,(3)、(4)和(7)含20 g·L-1蔗糖.培养温度(25±1)℃,光照度2 000 lx,光照12 h·d-1.     

蘘荷茎尖的离体快繁

1植物名称蘘荷(Zingiber mioga). 2材料类别根茎上的休眠芽. 3培养条件诱导休眠芽萌动培养基:MS 6-BA1.0 mg·L-1(单位下同) NAA0.2;增殖培养基:MS 6-BA 1.5 NAA 0.2;展叶、生根培养基:1/2MS 6-BA 1.0 NAA 0.5.以上培养基中均含3%蔗糖、0.8%琼脂,pH 5.8.培养温度为(26±1)℃,光照时间12 h·d-1,光照度1 800～2 000 lx.     

山莓的组织培养及快速繁殖

1植物名称山莓(Rubus corchorifolius). 2材料类别带芽茎段. 3培养条件(1)诱导侧芽萌动及不定芽分化培养基:MS 6-BA 1.0 mg·L-1(单位下同);(2)继代增殖培养基:MS IBA 0.1 6-BA 1.2;(3)生根培养基:1/2MS IBA 0.8.以上培养基均含3%蔗糖、0.7%琼脂,pH 5.8～6.2.培养温度为26～27℃,光照度1 400～1 600 lx,光照时间12h·d-1.     

土人参茎尖培养和植株再生

1　植物名称　土人参 (Talinumpaniculatum)。2　材料类别　实生苗之茎尖 ,种子取自本校花圃。3　培养条件　种子萌发培养基 :( 1 ) 1 /2MS +0 .7%琼脂 + 2 %蔗糖。丛生芽诱导培养基 :( 2 )MS + 6 BA 0 .5mg·L- 1 (单位下同 ) ;( 3)MS +NAA0 .5 + 6 BA 2 .0 ;( 4 )MS +NAA 0 .5 +KT 2 .0 ;( 5 )MS+NAA 0 .5 + 6 BA 3.0。丛生芽增殖培养基 :( 6)MS + 6 BA 2 .0 ;( 7)MS +NAA 0 .0 5 + 6 BA 3.0。生根培养基 :( 8) 1 /2MS +NAA 2 .0。上述 ( 2 )～ ( 8)培养基均附加 30 g·L- 1 蔗糖、7g·L- 1 琼脂 ,pH 5 .8。培养室温…     

小水榕的组织培养与快速繁殖

1植物名称小水榕(anubias barteri). 2材料类别茎尖、茎段. 3培养条件诱导培养基:(1)MS 6-BA 5.0 mg·L-1(单位下同) KT 5.0;增殖培养基:(2)MS 6-BA1.0,(3)MS 6-BA 2.0,(4)MS 6-BA 3.0,(5)MS 6-BA 4.0,(6)MS 6-BA 5.0;生根培养基:(7)MS NAA 0.3 IBA 0.2.各培养基中均添加20 g·L-1白糖、5 g·L-1琼脂,pH 5.8.培养温度25～30℃,诱导和增殖培养的光照度500 lx,生根培养的光照度1 500～2 000 lx,光照时间12 h·d-1.     

地被悬钩子的组织培养和快速繁殖

1植物名称地被悬钩子(Rubus calycinoides). 2材料类别茎段. 3培养条件基本培养基为MS培养基.(1)诱导愈伤组织培养基:MS 6-BA 2.0 mg·L-1(单位下同) NAA 0.1;(2)诱导分化培养基:MS 6-BA 2.0 NAA 0.5;(3)丛芽增殖培养基:MS 6-BA 2.0 NAA 0.1;(4)生根培养基:4/5MS NAA 0.5.以上培养基均加入0.7%的琼脂、3%蔗糖、pH 5.6.培养温度为(25±1)℃,光照度1 500～2000 lx,光照12 h·d-1.     

圆瓣姜花茎尖组织培养

1 植物名称圆瓣姜花(Hedychium forrestii). 2 材料类别茎尖. 3 培养条件以MS 为基本培养基.(1)茎尖诱导培养基:MS+6-BA 0.5 mg*L-1(单位下同)MS+NAA 0.2;(2)芽增殖培养基:MS+6-BA 4.0+NAA 0.1;(3)生根培养基:1/2MS+IAA 0.02.上述各培养基均附加2.0%蔗糖,0.7%琼脂,pH 5.4～5.8,在培养温度为(28±2)℃,光照度为2 000 lx连续光照下培养.     

金叶日本冬青的组织培养与快速繁殖

1植物名称日本金叶冬青(Ilex crenata),又名钝齿冬青. 2材料类别顶芽和带腋芽的嫩茎段. 3培养条件启动培养基:(1)MS 6-BA 3 mg·L-1(单位下同) NAA 0.01 2,4-D 0.1 蔗糖3%;继代增殖培养基:(2)MS 6-BA 1 NAA 0.2 蔗糖3%;生根培养基:(3)1/2MS NAA 0.6 2%蔗糖.上述培养基均加0.7%琼脂,pH 5.8.培养温度为(25 2)℃,光照度为1500 lx,光照时间12 h·d-1.     

光叶楮的组织培养和快速繁殖

1植物名称光叶楮(Broussonetia papyrifera),又名构树. 2材料类别茎尖与茎段. 3培养条件启动培养基:(1)MS 6-BA 1.0 mg·L-1(单位下同) NAA 0.5.增殖培养基:(2)MS 6-BA0.5 NAA 0.02;(3)MS 6-BA 1.0 NAA 0.2;(4)MS 6-BA 1.5 NAA 0.1;(5)MS 6-BA 1.5 NAA 0.5.生根培养基:(6)1/2MS IBA 0.5;(7)1/2MS NAA0.3;(8)MS 6-BA 0.2 NAA 0.01.以上培养基均添加3%蔗糖、0.7%琼脂,pH 5.8.培养温度25～28℃,光照12 h·d-1,光照度2 000lx.     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

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.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.