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刺五加SS和SE拷贝数与皂苷含量的相关性分析

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根据刺五加鲨烯合酶基因2 (squalene synthase,SS2)和鲨烯环氧酶基因1(squalene epoxidase,SE1)的DNA序列,通过Southern杂交和qRT-PCR法确定SS2和SE1的拷贝数.以actin为内参照基因,利用qRT-PCR法和分光光度法确定不同SS2和SE1拷贝数下的基因表达量和皂苷含量.结果表明,刺五加的SS2存在1和2拷贝,SE1存在1、2和3拷贝的类型及其相互组合的6种拷贝数组合基因型.刺五加SS2和SE1的表达量与皂苷含量均随拷贝数的增加而显著提高(P<0.05),两者间存在极显著的正相关关系(P<0.01).SS2和SE1每增加1个拷贝可使皂苷含量分别提高0.57和0.42倍.研究结果为进一步揭示刺五加皂苷含量差异形成的分子机理奠定了基础.
The Correlation Analysis on SS and SE of Copy Number and Saponins Content in Eleutherococcus senticosus
Be based on the DNA sequence ofsqualene synthase gene 2 (SS2) and squalene epoxidase gene 1 (SE1),using southern blotting and qRT-PCR technique to confirm the copy number of SS2 and SE1 gene.In this research we used the actin gene for reference gene,using qRT-PCR technique and spectrophotometry to confirm gene expression and saponins content of SS2 and SE1 gene in different copy number.The results show that SS2 gene the type of copy number is 1 and 2,and SE1 gene is 1,2,3 and six genotypes by their intercombination.The gene expression and saponins content of SS2 and SE1 gene are improved significantly (P<0.05) with the improving of copy number in Eleutherococcus senticosus.It has significantly positive correlation (P<0.01) SS2 and SE1 gene every addional one copy can improve 0.57 and 0.42 times saponins content.Research results established laid the foundation for reveal molecular mechanism that form the difference of saponins content in E.senticosus.

Eleutherococcus senticosusSqualene synthaseSqualene epoxidaseCopy numberSaponins

龙月红、尤鹏升、国红玉、尹峰、邢朝斌

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华北理工大学生命科学学院,唐山,063000

刺五加 鲨烯合酶 鲨烯环氧酶 拷贝数 皂苷

国家自然科学基金河北省教育厅资助科研项目华北理工大学培育基金

31570683QN2014102SP201508

2017

分子植物育种
海南省生物工程协会

分子植物育种

CSTPCDCSCD北大核心
影响因子:0.765
ISSN:1672-416X
年,卷(期):2017.15(2)
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