甘薯贮藏蛋白A基因5’端序列的克隆与分析

[目的]为开展Spo A 基因表达调控规律的研究及利用SopA启动子片段构建甘薯高效表达载体提供理论依据.[方法]应用PCR技术从徐薯18中克隆出甘薯贮藏蛋白A基因5′端1条长度为348 bp的DNA片段,然后应用PLACE、PlantCARE在线启动子预测工具进行分析.[结果]Spo A启动子序列除含有TATA-box、CAAT-box等启动子的保守元件外,还有蔗糖诱导响应元件CMSRE1、SP8作用位点等重要的顺式作用元件,以及一些其他调控序列如MYB结合位点.从序列分析结果可以推测该基因的启动子具有蔗糖创伤诱导响应的功能.[结论]该研究分析和推测了Spo A启动子序列中的作用调控元件,为今后利用该启动子构建甘薯高效表达载体奠定了基础.     

甘薯贮藏蛋白A基因5''端序列的克隆与分析

甘薯贮藏蛋白A（Sporamin A，spo A）是甘薯块根的主要贮藏蛋白质，占块根可溶性蛋白质总量的60％～80％，位于块根液泡的泡囊中。而在其地上部分的茎中只是微量存在，在叶和叶柄中几乎没有。Ohta等将Spo A基因5’上游的1kb区域与GUS融合，通过农杆菌介导转到烟草中，成功实现了GUS的高活性表达，同时通过SpoA启动子序列截短试验还证明获得GUS基因表达活性的最小长度为305bp。     

甘薯贮藏蛋白A基因5′端序列的克隆与分析

[目的]为开展Spo A基因表达调控规律的研究及利用SopA启动子片段构建甘薯高效表达载体提供理论依据。[方法]应用PCR技术从徐薯18中克隆出甘薯贮藏蛋白A基因5′端1条长度为348 bp的DNA片段,然后应用PLACE、PlantCARE在线启动子预测工具进行分析。[结果]Spo A启动子序列除含有TATA-box、CAAT-box等启动子的保守元件外,还有蔗糖诱导响应元件CMSRE1S、P8作用位点等重要的顺式作用元件,以及一些其他调控序列如MYB结合位点。从序列分析结果可以推测该基因的启动子具有蔗糖创伤诱导响应的功能。[结论]该研究分析和推测了Spo A启动子序列中的作用调控元件,为今后利用该启动子构建甘薯高效表达载体奠定了基础。     

甘薯中NBS-LRR类抗病基因同源序列的克隆及序列分析(英文)

The degenerate primers were designed based on the conserved NBS-LRR motifs among the known disease-resistance genes. A fragment of about 500 bp was amplified from genomic DNA of sweet potato using the specifically designed degenerate primers. After cloning and sequencing,20 NBS-LRR type of disease-resistance gene analogue (RGAs) in sweet potato were observed. The deduced amino acid sequence of DNA fragment contains the conserved motifs of NBS-LRR type RGAs,such as P-loop,Kinase-2α,Kinase-3α and GLPL domain. The 20 RGAs could be sorted into two subclasses,namely TIR-NBS-LRR type and non-TIR-NBS-LRR type. Compared with the known resistance genes including N,L6 and M,the percentages of homologous amino acid sequence in 10 TIR-NBS-LRR range between 21%-44%. While other 10 non-TIR-NBS-LRR assume 15%-46% homology with the known resistance genes (Prf,RPM1,RPS2,etc.). Consequently the RGAs may further be used as molecular marker for screening the candidate disease-resistance genes in sweet potato.     

棉铃虫蛋白酶体β5基因Habeta5的克隆与序列分析(英文)

[Objective] Using molecular biotechnology to clone the proteasome β5 gene from cotton bollworm (Helicoverpa armigera), this research aimed to provide basis for further research on the function of proteasome β5 gene in cotton bollworm. [Method] Total RNA was extracted from midgut of cotton bollworm. The full length cDNA of Habeta5 gene was cloned by using rapid amplification of cDNA ends (RACE) technology, then sequence analysis was carried out. [Result] The full length cDNA sequence was successfully cloned and isolated, named as Habeta5. It was 947 bp in length, contained an ORF (843 bp) and encoded 280 amino acid residues, with the predicted mass of 30.87 kD and isoelectric point(pI) of 9.60. In the deduced amino acid sequence, a proteasome β5 subunit domain lies between 74th to 261st amino acid residues. It has more than 62% identity to other insects such as Drosophila melanogaster. The proteasome β5 subunit conservative regions were very similar with each other. Molecular evolution by Neighbor Joining method indicated that Habeta5 was homologous with other proteasome β5 subunit of species. [Conclusion] Sequence alignment shows that the cloned fragment is a proteasome β5 subunit gene (GenBank accession number: FJ358434).     

南瓜基因CmNAC的克隆与序列分析(英文)

[目的]克隆南瓜基因CmNAC并进行序列分析。[方法]以南瓜叶片为材料,根据甘蓝型油菜NAC1、番茄NAC和辣椒NAC保守结构域设计一对简并引物,采用RT-PCR方法扩增得出长度约为440bp大小的DNA片段,将其克隆至pMDl9-T载体上,对重组克隆进行测序,用BLAST和DNAMAN软件对核酸及氨基酸序列进行分析。[结果]所获得的南瓜NAC基因片段由442个碱基组成,编码147个氨基酸,命名为CmNAC;该基因片段具有其它植物NAC基因中存在的保守区,并且属于NAC家族中ATAF1/2亚家族。[结论]实验拟在南瓜中获得和抗逆性相关的NAC基因,为进一步研究该基因的生物学功能和植物基因工程奠定理论基础。     

福建黄兔INHBA基因5’端cDNA克隆及序列分析

为扩增福建黄兔INHBA基因5’端,根据GenBank上已公布的家兔序列KC831577,设计了2条巢式引物,利用5’ RACE技术克隆福建黄兔INHBA基因5’端序列,获得1个682bp片段,对该片段克隆测序,获得包括5’ UTR、第1外显子及部分第1内含子的片段。利用在线软件预测在-229~-180bp处存在可能的启动子,同时还发现9个潜在转录因子结合位点,其中包含对转录有重要调控作用的TATA-box位点。     

地黄肌动蛋白基因片段的克隆与序列分析(英文)

[Objective] The aim of this study is to clone and analyze the actin gene from Rehmannia glutinosa. [Method] Degenerate primers were designed according to the conserved regions of actin sequences of Rehmannia glutinosa and its similar species,RT-PCR was next conducted to amplify the actin gene from Rehmannia glutinosa. [Result] The amplified fragment is 724 bp and correspondingly 240 amino acids. The BLAST results indicate that the homology between the amplified fragment and other higher plants for actin gene sequences and amino acid are more than 80% and 90%,respectively,suggesting that the amplified fragment is the actin gene of Rehmannia glutinosa. [Conclusion] Phylogenetic analysis shows that the actin gene of Rehmannia glutinosa has an intimate genetic relationship with actin7 gene of Nicotiana tabacum.     

山羊FSHR基因5’端侧翼序列的克隆与分析

为找寻山羊FSH受体基因的SNP突变位点，进行FSH受体基因的多态性分析和探索该受体基因在山羊多胎中的可能作用，利用比较基因组学的方法，根据绵羊FSH受体基因序列设计引物，以湖南湘东黑山羊基因组为模板，PCR扩增了FSH受体基因5’端侧翼调控区，通过克隆进行了序列测定及分析，并与牛、绵羊该区段序列进行了比较，结果表明，PCR扩增获得的片段为844bp，与中国西门塔尔牛该段序列相比，同源性为94．08％，在-364bp处的左翼发生了多碱基插入，湘东黑山羊该序列有5个碱基的插入，另在-625-619bp处的7个碱基缺失；与澳洲绵羊的FSHR基因比较，同源性为93．60％，在-367bp处的左翼，湘东黑山羊该段序列有2个碱基的插入，在-630，-145，-97bp处各有1个碱基缺失。     

菊花花瓣XTH基因cDNA序列的克隆与分析(英文)

[目的]为研究非乙烯敏感型菊科植物的木葡聚糖内糖基转移酶/水解酶(xyloglucan endo-transglycosylase/hydrolase,XTH)基因的结构特征。[方法]采用Trizol方法从菊花花瓣中提取总RNA,利用RT-PCR技术和T/A载体克隆XTH基因的cDNA序列。[结果]测序结果表明,克隆的cDNA片段大小为911bp,编码293个氨基酸残基,具有XTH蛋白家族的7个活性位点,命名该基因序列为CmXTH(基因登录号为HM752243);其推导的氨基酸序列与其它19种植物的XTH具有较高的同源性,其中与非洲菊、蕃茄的亲缘关系最近,而与猕猴桃、草莓、胡杨等的亲缘关系较远。[结论]克隆片段确为XTH基因的cDNA序列,可能与菊花花瓣的生长与衰老过程有关。     

Cloning and Analysis of 5' Flanking Region of Sporamin A Gene from Sweet Potato

[Objective] The aim of the study is to clone the 5’ flanking region of Sporamin A gene from sweet potato. [Method] The sweet potato "Xushu 18" was used to amplify the 5’ flanking region of Sporamin A gene using specifically designed primers and then target fragment was analyzed by PLACE and PlantCare online. [Result] Besides the conserved elements including TATA-box and CAAT-box,the cis-acting elements including sucrose responsive element CMSRE1,SP8 acting site and some other regulatory sequence such as MYB binding site were also found in Spo A promoter sequence. The results suggest that the promoter has sucrose responsive function.[Conclusion] The study provided reference to reveal the regulation law of Spo A,and to develop high-level expression vectors promoted by Spo A promoter.     

Cloning and Analysis of 5' Flanking Region of Sporamin A Gene from Sweet Potato

[Objective] The aim of the study is to done the 5' flanking region of Sporamin A gene from sweet potato. [Method] The sweet potato "Xushu 18" was used to amplify the 5' flanking region of Sporamin A gene using specifically designed primers and then target fragment was analyzed by PLACE and PlantCare online. [Result] Besides the conserved elements including TATA-box and CAAT-box, the cis-acting elements including sucrose re- sponsive element CMSREI, SP8 acting site and some other regulatory sequence such as MTB binding site were also found in Spo A promoter sequence. The results suggest that the promoter has sucrose responsive function. [Conclusion] The study provided reference to reveal the regulation law of Spo A, and to develop high-level expression vectors promoted by Spo A promoter.     

甘薯中NBS-LRR类抗病基因同源序列的克隆及序列分析

以高抗根腐病的“徐薯18”总DNA为模板进行PCR扩增,获得其抗病基因同源序列RGAs,对其氨基酸序列进行聚类分析和同源性比较分析,为进一步在甘薯中克隆R基因奠定基础。     

Cloning and Analysis of NBS-LRR Type Resistance Gene Analogues in Sweet Potato (Ipomoea batatas)

The degenerate primers were designed based on the conserved NBS-LRR motifs among the known disease-resistance genes. A fragment of about 500 bp was amplified from genomic DNA of sweet potato using the specifically designed degenerate primers. After cloning and sequencing,20 NBS-LRR type of disease-resistance gene analogue (RGAs) in sweet potato were observed. The deduced amino acid sequence of DNA fragment contains the conserved motifs of NBS-LRR type RGAs,such as P-loop,Kinase-2α,Kinase-3α and GLPL domain. The 20 RGAs could be sorted into two subclasses,namely TIR-NBS-LRR type and non-TIR-NBS-LRR type. Compared with the known resistance genes including N,L6 and M,the percentages of homologous amino acid sequence in 10 TIR-NBS-LRR range between 21%-44%. While other 10 non-TIR-NBS-LRR assume 15%-46% homology with the known resistance genes (Prf,RPM1,RPS2,etc.). Consequently the RGAs may further be used as molecular marker for screening the candidate disease-resistance genes in sweet potato.     

Cloning and Analysis of NBS-LRR Type Resistance Gene Analogues in Sweet Potato ( Ipomoea batatas)

The degenerate primers were designed based on the conserved NBS-LRR motifs among the known disense-resistance genes. A fragment of about 500 bp was amplified from genomic DNA of sweet potato using the specifically designed degenerate primers. After cloning and sequencing, 20 NBS-LRR type of disoase-resistance gene analogue (RGAs) in sweet potato were observed. The deduced amino acid sequence of DNA fragment contains the conserved motifs of NBS-LRR type RGAs, such as P-loop, Kinase-2α, Kinase-3α and GLPL domain. The 20 RGAs could be sorted into two subclasses, namely TIR-NBS-LRR type and non-TIR-NBS-LRR type. Compared with the known resistance genes including N, L6 and M, the percentages of homologous amino acid sequence in 10 TIR-NBS-LRR range between 21% -44%. While other 10 non-TIR-NBS-LRR assume 15% -46% homology with the known resistance genes (Prf, RPM1, RPS2, etc.). Consequently the RGAs may further be used as molecular marker for screening the candidate disease-resistauce genes in sweet potato.     

甘薯中类胡萝卜素提取工艺

[目的]探求甘薯中类胡萝卜素的最佳提取工艺,以实现甘薯的综合利用。[方法]采用紫外可见分光光度计测定不同溶剂、料液比、浸提时间、浸提温度条件下提取所得类胡萝卜素溶液的吸光值,并以此作为指标来考察甘薯中类胡萝卜素提取的最佳工艺。[结果]试验得出,甘薯中类胡萝卜素的最佳提取溶剂为乙酸乙酯、最佳料液比为1∶25 g/m L、最佳浸提时间为50 min、最佳温度为50℃,此条件下类胡萝卜素的取得率达到135.5 mg/kg。[结论]该方法简便,试验设备简单、操作方便、安全性较大,而且甘薯在我国分布广泛,来源丰富,价格低廉,可为今后的类胡萝卜素提取研究以及甘薯的综合利用奠定基础。     

甘薯茎尖营养成分分析

以蔬菜型甘薯新品种百薯1号为材料,研究了甘薯茎尖的主要营养成分。结果表明:甘薯茎尖的食部为100%,含水量89%,蛋白质含量32g/kg,脂肪含量4g/kg,膳食纤维含量13g/kg,Vc和VB2的含量分别为400和1.4mg/kg。甘薯茎尖的矿质元素钙、钾、硒、铜含量最高,分别为1800mg/kg、4000mg/kg、20μg/kg和2.4mg/kg。磷含量620mg/kg,镁含量430mg/kg,锌含量4.6mg/kg,铁含量较少。甘薯茎尖富含人体所必需的各种氨基酸,总氨基酸含量居常见蔬菜之首。甘薯田间抗病性好,在种植过程中不需要喷施任何农药,烹饪后的菜鲜嫩清香,是一种营养丰富的绿色保健蔬菜。