摘要: 柠条是包括内蒙古在内干旱荒漠草原上的优势建群植物,具有极强的耐旱(寒)力,为了研究其抗逆机理,挖掘和利用其抗旱基因,用Trizol法从经过干旱处理的柠条当年新生幼嫩枝叶中提取总RNA,分离纯化mRNA,采用SMART技术反转录合成双链cDNA,DSN技术进行均一化,构建了柠条全长cDNA文库。经检验,文库的滴度为1.5×106cfu/mL,重组率为93.75%,90%以上插入片段的长度为1.0~2.0 kb。从文库中随机挑取3200个克隆进行5’测序,得到3020个有效EST,合成2429个unigenes,其中,singlets 2229条,占总有效序列的91.76%,经与数据库比对,发现了脱水素、抗旱相关转录因子等多个抗旱相关基因。
关键词:
柠条锦鸡儿,
干旱处理,
均一化全长cDNA文库,
EST分析
Abstract: In order to study the drought tollerence genes of korshinsk peashrub,a normalized full-length cDNA?library was constructed using Creator SMART technology combined with duplex-specific nuclease(DSN) from water?stressed leaves. The titer of original library was 1. 5 ×106cfu/mL,the recombinant efficiency was 93. 75% and the?average of insert size was over 1 kb,these results showed the cDNA library was of high quality. Besides,3 200?clones from it were selected randomly and sequenced. 2 429 unigenes were obtained,among them 2 229 was singlets,means this library was normalized well. Some genes which response to drought were found after BLAST.
Key words:
Korshinsk peashrub,
Water stress,
Normalized full-length cDNA library,
EST analysis
中图分类号:
郭九峰, 孙国琴, 乔慧蕾. 水分胁迫柠条锦鸡儿叶片均一化全长cDNA文库的构建及EST分析[J]. 华北农学报, 2012, 27(3): 67-71. doi: 10.3969/j.issn.1000-7091.2012.03.013.
GUO Jiu-feng, SUN Guo-qin, QIAO Hui-lei. Construction and EST Analysis of a Normalized Full-Length cDNA Library from Water Stressed Korshinsk Peashrub Leaves[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(3): 67-71. doi: 10.3969/j.issn.1000-7091.2012.03.013.