泡桐愈伤组织再生植株的诱导与培养

首先以MS为基本培养基从18个不同浓度的NAA和BA组合中,找出了毛泡桐（Paulownia tomentosa）、南方泡桐（Pauiownia australis）、白花泡桐（Paulownia fortunei）、兰考泡桐（Paulownia elongata）和豫杂一号泡桐(Paulownia tomentosa×P.fortunei)叶片愈伤组织诱导芽分化最适培养基分别为MS+0.3NAA+12 BA、MS+0.3NAA+12 BA、MS+0.5NAA+12 BA、MS+0.5NAA+12 BA和MS+0.7NAA+12 BA;然后,筛选出了5种泡桐芽诱导根的最适培养基（分别为1/2MS+0.1NAA、1/2MS+0.1NAA、1/2MS、1/2MS+0.3NAA和1/2MS+0.5NAA）。这些结果为利用不同种泡桐的原生质体融合培育泡桐新品种奠定了一定的基础。     

地灵的组织培养及快速繁殖

1　植物名称　地灵 (Stachyssieboldii)。2　材料类别　根状茎。3　培养条件　起始培养基 :1 /2MS ,不添加任何激素。诱导愈伤组织培养基 :( 1 )MS + 6 BA 1 .2mg·L- 1 (单位下同 ) +NAA 0 .6;( 2 )MS + 6 BA 1 .8+NAA 0 .6;( 3)MS + 6 BA 2 .4+NAA 0 .6;( 4 )MS+ 6 BA 3+NAA 0 .2 ;( 5 )MS + 6 BA 2 +NAA 0 .1 ;( 6)MS + 6 BA 2 .5 +NAA 0 .1。诱芽培养基 :( 7)MS + 6 BA 2 +KT 0 .1 +NAA 0 .1。增殖培养基 :( 8)MS + 6 BA 2 +NAA 0 .2。诱导愈伤组织和芽的培养基均添加 4%蔗糖 ,增殖培养基添加 3%蔗糖 ,琼脂 0 …     

猪笼草的组织培养和快速繁殖

1　植物名称　猪笼草 (Nepenthes×hybriduscv .Dyeriana)。2　材料类别　顶芽、腋芽。3　培养条件　基本培养基为MS。丛生芽诱导及继代培养基 :(1)MS +6 BA 2 .0mg·L- 1(单位下同 ) +NAA 0 .1;(2 )MS +6 BA 1.0 +NAA 0 .0 5 ;(3) 1/2MS +6 BA 2 .0 +NAA 0 .1;(4 ) 1/ 2MS +6 BA 1.0+NAA 0 .0 5 ;(5 ) 1/ 2MS +6 BA 0 .5 +NAA 0 .0 5。生根培养基 :(6 ) 1/ 2MS ;(7) 1/ 2MS +IBA 0 .5 +NAA 0 .5 ;(8) 1/ 2MS +6 BA 0 .1+NAA 0 .5 ;(9) 1/2MS +6 BA 0 .1+NAA 0 .5 +0 .0 5 %活性炭。以上培养基均加入 0 .7…     

猫耳朵的组织培养

1　植物名称　猫耳朵 (Boeahygrometrica) ,别名中耳草、牛耳草、八宝茶、石花子、地膏药、还魂草。2　材料类别　叶片。3　培养条件　诱导愈伤组织培养基 :( 1 )MS +6 BA 1 .0mg·L- 1 (单位下同 ) +NAA 0 .1 ;( 2 )MS + 6 BA 2 .0 +NAA 0 .1 ;( 3)MS + 6 BA 3.0 +NAA 0 .1。诱导芽培养基 :( 4 )MS + 6 BA 2 .0 ;( 5 )MS + 6 BA 1 .0 +NAA 0 .2 ;( 6)MS + 6 BA 2 .0 +NAA 0 .2 ;( 7)MS + 6 BA 3.0 +NAA 0 .2 ;( 8)MS +6 BA 4.0 +NAA 0 .2。生根培养基 :( 9) 1 /2MS ;( 1 0 ) 1 /2MS +NAA 0 .0 1 ;( 1 1 ) 1 /2MS…     

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…     

香蕉草的固体培养和液体培养

1　植物名称　香蕉草 (Nymphoidesaquatica)。2　材料类别　嫩叶片 ( youngleaves)。3　培养条件　丛生芽诱导和增殖固体培养基 :( 1 )MS+ 6 BA 2 .0mg·L- 1 (单位下同 ) +NAA 0 .2 ;( 2 )MS + 6 BA 0 .5～ 3.0 +NAA 0 .2 ;( 3)MS + 6 BA0 .5～ 3.0 +IAA 0 .3;( 4 )MS + 6 BA 0 .5～ 3.0 +IBA 0 .3。丛生芽诱导和增殖液体培养基 :( 5 ) 1 /2MS + 6 BA 1 .0 +IAA 0 .3。生根培养基 :( 6)MS +IBA 0 .3+NAA 0 .2。以上培养基均附加 2 %白糖(sugar) ,0 .75 %的琼脂 (agar,液体培养基除外 ) ,pH5 .8,培养温度为 ( 2 5± 2 )…     

紫叶稠李的离体快速繁殖

1　植物名称　紫叶稠李 (Prunusvirginiana“Schubert”)。2　材料类别　腋芽 (axillarybud)。3　培养条件　基本培养基为MS。诱导芽培养基 :( 1 ) 1 /2MS + 6 BA 1 .0mg·L- 1 (单位下同 ) +NAA0 .0 1。丛生芽增殖培养基 :( 2 ) 1 /2MS + 6 BA1 .0 +NAA 0 .1 ;( 3) 1 /2MS + 6 BA 0 .5 +IAA 0 .1。生根培养基 :( 4 ) 1 /2MS +NAA 0 .5 ;( 5 ) 1 /2MS +IBA 0 .7。其中 ,诱导与增殖培养基添加 3%蔗糖 ,生根培养基添加 2 %蔗糖。生根培养基附加少许活性炭。以上培养基均加入 7%琼脂 ,pH 5 .8～ 6.0。培养温度 ( 2 3± 2 )℃ ,…     

南洋楹的组织培养

植物名称:南洋楹(Albizzia falcata)。材料类别:10～15日龄无菌苗。培养条件;基本培养基MS。(1)MS(不加激素)作培养无菌苗之用。诱导愈伤组织培养基为(2)MS NAA2.0mg/L(单位下同) BA0.5;(3)MS IAA2.0 BA0.5;(4)MS 2,4-D1.0 KT0.5;(5)2/3MS NAA0.2 BA0.5。(6)诱导芽分化培养基是MS BA2.0～3.0 NAA0～0.1。(7)芽增殖培养基是MS BA0.5～3.0 NAA0～2.0。(8)诱导生根培养基是1/2MS或MS IBA0～3.0。各种培养基均用琼脂固化,pH5.8,光照强度2000     

袋鼠花的组织培养和快速繁殖

1　植物名称　袋鼠花 (Anigozanthosflavidus) ,又名袋鼠藤。2　材料类别　茎尖、幼嫩的茎段。3　培养条件　以MS为基本培养基。丛生芽诱导培养基 :( 1 )MS + 6 BA 2mg·L- 1 (单位下同 ) +NAA 0 .2 ;( 2 )MS + 6 BA 1 .5 +NAA 0 .2 ;( 3)MS+ 6 BA 0 .5 +IBA 0 .2。增殖培养基 :( 4 )MS + 6 BA 1 +NAA 0 .2。生根培养基 :( 5 ) 1 / 3MS +IBA0 .1～ 0 .5 + 0 .7%琼脂粉 + 0 .5 %活性碳 + 1 .5 %蔗糖 ;( 6) 1 / 2MS +NAA 0 .5。除培养基 ( 5 )外 ,其它均加 3%的蔗糖。培养基 ( 1 )～ ( 4 )琼脂含量均为0 .7%。pH 5 .8。培养…     

海州蒿组织培养和植株再生

1　植物名称　海州蒿 (Artemisiafauriei)。2　材料类别　茎尖。3　培养条件　愈伤组织诱导培养基 :(1)MS +6 BA1mg·L- 1(单位下同 ) +NAA 1;(2 )MS +6 BA 1+NAA 0 .5 ;(3)MS +6 BA 2 +NAA 0 .5。芽分化培养基 :(4 )MS +6 BA 1;(5 )MS +6 BA 2 ;(6 )MS +6 BA 5 +NAA 0 .1;(7)MS +6 BA 2 +NAA 0 .0 1。生根培养基 :(8) 1/2MS ;(9) 1/2MS +NAA 0 .1;(10 )MS。以上培养基中的蔗糖含量除生根培养基 (8)～(10 )为 2 0 g·L- 1外 ,其余均为 30 g·L- 1。pH 5 .8～6 .0。培养温度 (2 5± 1)℃ ,光照时间 14h·d- 1,…     

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.