大麦黄矮病毒（BYDV）外壳蛋白基因在小麦原生质体中的…

实验采用ＰＥＧ介导法转化小麦，用ＧＵＳ基因作为标志，用荧光法测定Ａｃｔｌ－ＧＵＳ，Ｅｍｕ－ＧＵＳ，３５Ｓ－ＧＵＳ三种质粒转化小麦细胞后的瞬间表达强度，以比较Ａｃｔｌ，Ｅｍｕ，３５Ｓ三种启动子在小表中的表达强度，结果表明Ａｃｔｌ和Ｅｍｕ的强度大致相等，均比３５Ｓ强，采用Ｅｍｕ为启动子带ＢＹＤＶＣＰ基因的质粒和经改造过的Ａｃｔｌ为启动子带有抗潮霉素选择记基的质粒转化小麦“济南１７７”的原生质体，转化６     

微弹射击将大麦黄矮病毒外壳蛋白基因转入小麦获可育植株

以小麦品种济南１７７、３８４、４７１的幼胚和济南１７７的胚性愈伤组织为材料，质粒为ｐＰＰＩ２［含大麦黄矮病毒外壳蛋白（ＣＰ）基因和ＧＵＳ（β－葡萄糖苷酸酶）基因］；ｐＰＰＩ５（含ＣＰ基因）＋ｐＥｍｕＧＮ（含ＧＵＳ基因），用高速基因枪轰击钨粉质粒进入幼胚和胚性愈伤组织细胞．ＧＵＳ基因的瞬间表达平均频率幼胚约为４２％，愈伤组织为１８．５％．转化处理后用ＰＣＲ扩增技术检测植株中ＣＰ基因是否存在并稳定遗传．检测结果表明，来源于幼胚的Ｔ０代转化频率为２～９％（１９９３～１９９４年），并获得Ｔ１、Ｔ２和Ｔ３代稳定表达的转化植株．用愈伤组织转化，其转化频率３月龄者为０．４％；２年龄者为零．潮霉素（Ｈｍ）用于对转化幼胚和愈伤组织的筛选，低浓度时不能抑制非转化细胞的生长，高浓度则使细胞受伤害，不能再生正常健壮的植株     

BYDV CP基因转化小麦原生质体及转基因植株再生

用原生质体融合技术与ＰＥＧ介导的直接转基因方法相结合，使高频率分裂的小麦济南１７７悬浮细胞系原生质体与具有分化能力的小麦济南１７７胚性意伤组织原生质体融合，形成具有分裂和分化能力的融合细胞；同时，利用ＰＥＧ对原生质体的直接转基因作用，将带有抗病毒基因（ＢＹＤＶＣＹｇｅｎｅ）的质粒Ｐｐｐ１５与带有抗性选择标记基因的质粒严ＰＢｌＡｃｔＳＮ导入融合细胞中．经抗性筛选获得抗潮霉素（Ｈｍ）的阳性克隆并再生植株．对再生植株作ＰＣＲ检测表明，ＣＰ基因已整合到转化植株的基因组中并稳定表达．     

BYDVCP基因转化小麦原生质体及转基因植株再生

用原生质体融合技术与ＰＥＧ介导的直接转基因方法相结合，使高频率分裂的小麦济南１７７悬浮细胞系原生质体与具有分化能力的小麦济南１７７胚性愈伤组织原生质体融合，形成具有分裂和分化能力的融合细胞；同时，利用ＰＥＧ对原生质体的直接转基因作用，将带有抗病基因的质粒Ｐ＾ｐｐ１５与带有抗性选择标记基因的质粒Ｐ＾ＢｌＡｅｔＳＮ导入融合细胞中。经抗性筛选获得抗潮霉素的阳性克隆并再生植株。对再生植株作ＰＣＲ检测表明，     

GUS和HPT基因的基因枪法转化水稻

以水稻（丹粳－５号）愈伤组织为受体材料，采用基因枪法将含有ＧＵＳ和ＨＰＴ基因的ＣＭ２质粒导入水稻细胞．经过５０ｍｇ／Ｌ的潮霉素筛选，获得抗性愈伤组织，并在同样筛选压力下诱导分化成苗，获得抗性苗．共获得１７个抗性克隆．ＧＵＳ组织化学检测表明，有１２个克隆为ＧＵＳ阳性，ＧＵＳ和ＨＰＴ基因共表达率为７０％左右．Ｓｏｕｔｈｅｒｎ分子检测证明ＨＰＴ基因已整合到水稻基因组中．     

根癌农杆菌对黄瓜和朱顶红的转化

用携带有构建质粒Ｃｏ１８的根癌农杆菌（Ａｇｒｏｂａｃｔｅｒｉｕｍｔｕｍｅｆａｃｉｅｎｓ）菌株ＧＶ３１１－ＳＥ转化双子叶植物黄瓜子叶和单子叶植物朱顶红鳞叶，得到了抗卡那霉素的黄瓜植株和朱顶红愈伤组织，并测出了ＮｐＤＨ活性，证明构建质粒Ｃｏ１８所携带的外源基因转移进了这两种植物细胞并得到了表达。     

根癌农杆菌的高效电激转化

利用电激法双元载体质粒ｐＢＩ１２１导入根癌农杆菌ＡＧＬ－１并获得较高转化效率。探讨了不同电激条件对转化效率的影响，并检测了ＣａＭＶ３５Ｓ启动子ＧＵＳ基因在根癌农杆菌中的表达。     

以潮霉素B磷酸转移酶基因为遗传标记的启动子探针型载体的 …

用来自大肠杆菌的潮霉素Ｂ磷酸转移酶基因作为遗传标记构建了启动子探针型载体ｐＳＵＰＶ８，该基因的转录和翻译起始区以及５‘－端编码区两个密码子均被除去，载体骨架为大肠杆菌质粒ｐＵＧＶ２该标记基因的终止子来自Ｐｈａｎｅｒｃｈａｅｔｅ ｃｙｓｏｓｐｏｒｉｔｍ的ＬＩＰ６基因。     

早熟禾的组织培养和基因枪介导的基因转化体系的初步建立

分析了不同质量浓度的２,４－二硝基苯酚对早熟禾愈伤组织诱导和愈伤组织分化成苗的影响,３ｍｇ／Ｌ和０．１ｍｇ／Ｌ２,４－Ｄ分别是本试验所用早熟禾基因型诱导形成愈伤组织和愈伤组织分化成勒的最适度量浓度。利用基因针ＧＵＳ基因的ｐＧＡ４７０和ｐＡｃｔ１－Ｄ质粒导入愈伤组织,通过组织染色法检测到Ｇｕｓ基因的瞬时表达。     

恶臭假单胞菌萘质粒ⅠNL基因的克隆及酶切图谱

恶臭假单胞菌（ＰｓｅｕｄｏｍｏｎａｓｐｕｔｉｄａＧ７）携带的质粒ＮＡＨ７，经限制性内切酶ＥｃｏＲＩ切割后，产生含有萘降解酶全部基因（２４，６ｋｂ）的片段，此片段插入到载体ｐＵＣ１１９的多克隆位点，构成了ｐＫＡＯ质粒，此质粒经ＨｐａＩ，ＥｃｏＲＩ酶切获得的５．１ｋｂ片段亚屯隆到ｐＵＣ１１９中，衍生出ｐＮＮ１质粒，绘制出内切酶图谱。从ｐＮＮＩ质粒上切下含目的基因ｎａｈＩ、ｎａｈＮ和ｎａｈＬ的ｋｐｎＩ－ｋｐｎＩ片段（２．３ｋｂ）．正向插入载体ＢｌｕｅｓｃｒｉｐｔⅡＳＫ＋中获得重组质粒ｐＮＮ２，反向插入为ｐＮＮ３，将其转化到大肠杆菌ＸＬ１－Ｂｌｕｅ中，目的基因得以大量增殖。     

多能硫杆菌RubisCO基因（rbcL－rbcS）的克隆及限制性内切酶图谱分析

以光合细菌圆球状红杆菌Ｒｈｏｄｏｂａｃｔｅｒｓｐｈａｅｒｏｉｏｄｅｓ的ｒｂｃＬ－ｒｂｃＳ基因为探针，与多能硫杆菌（Ｔｈｉｏｂａｃｉｌｌｕｓｖｅｒｓｕｔｕｓ）染色体ＤＮＡ酶切谱带进行Ｓｏｕｔｈｅｒｎ杂交，检测到了ｒｂｃＬ－ｒｂｃＳ基因的同源序列，又以ｐＵＣ９为载体，克隆了Ｔ．ｖｅｒｓｕｔｕｓ染色体ＤＮＡＰｓｔＩ酶切片段，构建成Ｔ．ｖｅｒｓｕｔｕｓ基因文库，并从这个基因文库中筛选到了含有ＲｕｂｉｓＣＯ基因的重组质粒，将其命名为ｐＳＤＬＳ－１０，进一步对ｐＳＤＬＳ－１０进行了限制性酶切分析，作出了ｐＳＤＬＳ－１０限制性内切酶图谱     

Generation of transgenic wheat resistant to wheat yellow mosaic virus and identification of gene silence induced by virus infection

The plasmid containing the promoter Act1, the coat protein (cp) gene of wheat yellow mosaic virus (WYMV) and the selectable bar gene, was delivered via particle bombardment, directly into immature embryos of a wheat cultivars. PCR and PCR-RFLP were employed to screen the existence of the cp gene in T0 and T1 generations. Seeds from the positive T1 plants were sowed in fields heavily contaminated with WYMV to detect their resistance. In field trial of virus infection, one of the transgenic wheat lines, P8-T2, exhibited highly disease-resistance. Western blot and RT-PCR analysis showed that the expression level of cp gene in the resistant transgenic line was reduced greatly compared to those susceptible to WYMV infection. This provided evidence to presume that the resistance obtained by the transgenic wheat line was stimulated by the mechanism of the virus induced gene silencing.     

人白介素-3乳腺表达载体的构建

人白介素-3是一种造血系统和免疫系统调节剂,在治疗造血系统疾病、肿瘤、先天或获得性免疫功能缺陷等方面发挥着重要作用.应用牛乳腺生物反应器生产人白介素-3的研究具有重要的临床应用和经济价值.研究选用具有红色荧光蛋白报告基因(R ed2)和新霉素抗性基因(neor)表达框架的pD sR ed2-1质粒为骨架构建人白介素-3乳腺表达载体.通过PCR方法分别扩增牛β-酪蛋白基因5′端上游调控序列、人IL-3基因以及CM V启动子序列,将它们按先后顺序分别定向克隆于质粒pD sR ed2-1的多克隆位点内,使牛β-酪蛋白基因调控序列位于人IL-3基因的上游,指导人IL-3基因在乳腺组织中特异性表达,而CM V启动子位于红荧光蛋白基因的上游,指导红荧光蛋白基因在所有的组织中非特异性表达.限制性酶切片段分析及部分DNA序列鉴定结果表明,所构建载体结构正确.     

大麦黄矮病毒抗性基因的Ti质粒构建

通过酶切、连接、转化等技术 ,将大麦黄矮病毒抗性基因复制酶基因ORF2插入Ti质粒pGA4 82的T DNA区 ,从而提供了新的目的基因转化小麦的农杆菌 /质粒系统 .     

Isolation of a pollen specific promoter in tritordeum

The promoter is a cis-acting element in regulating gene expression. A promoterless plasmid containing UidA gene was transformed into tritordeum by barmbadment. Histochemical analysis of various tissues in transgenic tritordeum was carried to examine tissue-specific expression of GUS(beta-glucuronidase) activity. The pollen-specific promoter was trapped and identified successfully in a transformant line. PCR(polymerase chain reaction) method was used to isolate this pollen-specific promoter. By sequencing and analyzing the amplified fragment from PCR, a part of UidA gene and a flanking sequence were obtained. Some essential elements of plant promoters were found in the sequence. To determine the function of it, the cloned fragment was fused with UidA gene, then cloned and transformed into Triticum durum. The transgenic plant transformed by this vector showed GUS expression only in pollen. Therefore a pollen-specific promoter was isolated successfully.     

人TCTP基因的克隆与原核表达

人翻译控制肿瘤蛋白（hTCTP）是一个在进化过程中高度保守且具有很高表达量的蛋白家族。本实验通过PCR技术扩增人hTCTP基因,经酶切后插入表达质粒pGEX-4T-2构建表达载体,转化大肠杆菌后挑选阳性菌进行菌落PCR及质粒酶切鉴定,确证克隆成功并构建了人hTCTP基因表达载体。重组表达载体经IPTG诱导表达出目的蛋白,用超声破碎、亲和层析和SDS-PAGE对目的蛋白进行了分离纯化并鉴定。     

长叶车前花叶病毒上海株(RMVsh)外壳蛋白基因的克隆、序列分析及原核表达

长叶车前花叶病毒上海分离株（RMVsh)是从上海郊区的青菜（Brassica chinensis)上分离鉴定的，以提纯的病毒为材料，SDS－酚法纯化的基因组RNA作为模板，通过RT－PCR方法克服了该病毒的外壳蛋白基因（CP），DNA序列测定结果表明，外壳蛋白基因全长474个碱基，编码157个氨基酸，将CP基因插入原核表达载体pBAD/His-C中，转化E.coli Top10后，诱导表达，经聚丙烯酰胺凝胶电泳分析呈－特异性的蛋白条带，Western blot检测表明，表达产物与RMVsh抗血清呈阳性反应，RMVsh CP基因的核苷酸序列及氨基酸序列与烟草花叶病毒属中其他能侵染十字花科作物的成员相比，同源率分别为83．5％－98．9％和87．9％－99．4％，并讨论了RMVsh的分类地位为烟草花叶病毒属侵染十字花科植物2个亚组中的第一亚组的代表。     

牛酪蛋白基因导入大豆的研究

将带有牛酪蛋白基因caseinB的植物表达载体 pAS -2 ,在大豆自花授粉后 ,用注射法导入大豆受精子房中 .以质粒 pAS -2的 3 5S -Casein -Gus片段为模板 ,随机引物法标记探针 ,对 1 0 3株受体植株后代的DNA进行点杂交和Southern杂交 ,发现其中 1株在点杂交和Southern杂交中均呈阳性 .证明外源基因已整合到大豆基因组中 .     

The VER2 promoter contains repeated sequences and requires vernalization for its activity in winter wheat （Triticum aestivum L.）

Previously, we isolated a vernalization-related gene, VER2, from winter wheat (Triticum aestivum L.) and its expression was restricted in the immature leaves of vernalized wheat seedlings. To further investigate the regulation of VER2 expression and the function of its promoter, we isolated a 41.7 kb genomic clone containing VER2 gene from atransformation-competent artificial chromosome (TAC) library of wheat (Triticum aestivum-Haynaldia villosa). The sequence analysis showed that there were eleven predicted genes in the TAC. The exons of gene 3 corresponded to the cDNA sequence of VER2 gene. Analysis of VER2 promoter structure showed that there were three small repeat sequences divided by two large repeat sequences. The putative response elements, such as abscisic acid response elements (ABRE), MeJA-response elements (Me-JARE), low-temperature response elements (LTR), endosperm expression elements, MYB binding sites and similar elements to GA response elements (GARE), were involved in the VER2 promoter region. Construct containing the VER2 promoter (-5895 to 73) driving GFP reporter gene was bombarded into vernalized or non-verualized immature leaves in wheat. The vernalized immature leaves showed bright green fluorescence after incubation for 24 h, however, the green fluorescence was not observed in the non-vernalization leaves under the same condition. These results suggested that vernalization was essential for the function of VER2 promoter in the immature leaves of winter wheat.