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| 1 | 狗蔷薇细胞分裂素氧化酶基因RcCKX5的克隆及表达分析显示文摘利用RACE技术从狗蔷薇(Rosa canina)类根体中克隆得到1个细胞分裂素氧化酶基因cDNA全长,命名为RcCKX5。序列分析表明,RcCKX5 cDNA全长1 815 bp,5′UTR 104 bp,ORF 1 626 bp,3′UTR85 bp,编码541个氨基酸,具有CKX家族典型的FAD(黄素腺嘌呤二核苷酸)结合域和CK(细胞分裂素)结合域。氨基酸序列多重比对和系统进化树分析显示RcCKX5与可可TcCKX5亲缘关系最近,与拟南芥AtCKX5、乌拉尔图小麦TuCKX5同源性较高。荧光定量PCR分析表明,狗蔷薇RcCKX5在其根、茎、叶、花、果实中均有表达,根中相对表达量最高,花和果实中相对表达量较高。在狗蔷薇类根体形成发育过程中RcCKX5的相对表达量不断升高,21 d时达到最高,随后稍有下降,表明其可能参与了类根体的形成。6-BA处理结果表明RcCKX5能够快速响应6-BA的诱导,表达量显著上调,2.5 mg·L-1 6-BA处理120 h时,RcCKX5的相对表达量达到最高峰。 | 王玲 高彬 温超 郗琳 刘凤栾 马男 赵梁军 | 2014 | 园艺学报2014，41，7： | 8 |
| 2 | Genome-wide analysis and identification of cytokinin oxidase/dehydrogenase(CKX) gene family in foxtail millet(Setaria italica)显示文摘Cytokinin oxidase/dehydrogenase(CKX; EC.1.5.99.12) regulates cytokinin(CK) level in plants and plays an essential role in CK regulatory processes. CKX proteins are encoded by a small gene family with a varying number of members in different plants. In spite of their physiological importance, systematic analyses of SiCKX genes in foxtail millet have not yet been examined. In this paper, we report the genome wide isolation and characterization of SiCKXs using bioinformatic methods. A total of 11 members of the family were identified in the foxtail millet genome. SiCKX genes were distributed in seven chromosomes(chromosome 1, 3, 4, 5, 6, 7, and 11). The coding sequences of all the SiCKX genes were disrupted by introns, with numbers varying from one to four. These genes expanded in the genome mainly due to segmental duplication events. Multiple alignment and motif display results showed that all SiCKX proteins share FAD- and CK-binding domains. Putative cis-elements involved in Ca2+-response, abiotic stress response, light and circadian rhythm regulation, disease resistance and seed development were present in the promoters of SiCKX genes. Expression data mining suggested that SiCKX genes have diverse expression patterns. Real-time PCR analysis indicated that all 11 SiCKX genes were up-regulated in embryos under 6-BA treatment, and some were NaCl or PEG inducible. Collectively, these results provide molecular insights into CKX research in plants. | Yuange Wang Huaihua Liu Qingguo Xin | 2014 | The Crop Journal2014，2，4： | 3 |
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