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Position: Home > Articles > Preliminarily Identifying Function of MtCKX Gene from Medicago truncatula Chinese Journal of Grassland 2018 (2) 1-7

蒺藜苜蓿MtCKX基因功能的初步鉴定

作  者:
李殷睿智;韩东英;刘卓成;滕珂;晁跃辉;韩烈保
单  位:
北京林业大学草坪研究所
关键词:
蒺藜苜蓿;MtCKX基因;亚细胞定位;表达分析
摘  要:
采用RT-PCR法克隆了蒺藜苜蓿MtCKX基因,基因编码区长1635bp,编码544个氨基酸。生物信息学分析表明,其编码的蛋白与其他物种CKX蛋白具有较高的同源性,与鹰嘴豆的同源性最高。荧光定量分析结果表明,MtCKX基因在蒺藜苜蓿叶片中的表达量最高。此外,MtCKX基因还响应IAA、6-BA的诱导。成功构建了35S::MtCKX:YFP植物表达载体,亚细胞定位分析表明,MtCKX定位于细胞膜和细胞核。过表达的蒺藜苜蓿MtCKX基因可导致转基因拟南芥中细胞分裂素含量显著降低。
译  名:
Preliminarily Identifying Function of MtCKX Gene from Medicago truncatula
作  者:
LI Yin-rui-zhi;HAN Dong-ying;LIU Zhuo-cheng;TENG Ke;CHAO Yue-hui;HAN Lie-bao;Turfgrass Research Institute,Beijing Forestry University;
关键词:
Medicago truncatula;;MtCKX;;Subcellular localization;;Quantitative Real-time PCR
摘  要:
CKX,a key factor that manipulates plant endogenous cytokinin content,is considered as the target gene that regulates crop yield and resistance.MtCKX was cloned by RT-PCR from Medicago truncatula.The coding domain sequence was 1635 bp in length,encoding 544 amino acids.Based on bioinformatic analysis,MtCKX showed highly homologous characteristics with other CKX family genes,especially homologous with CKX from Cicer anetinum.Quantitative Real-time PCR showed that the expression of MtCKX was highest in the leaf blade.MtCKX was responsive to the induction of IAA and 6-BA.CKX gene was inserted into 3302 Yplasmid to construct the plant expression vector 35 S::MtCKX:YFP.Subcellular localization analysis showed that MtCKX localized in the membrane and nucleus.Over expression of MtCKX gene resulted in a significant decrease in cytokinin content in transgenic Arabidopsis thaliana.

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