李翔;侯璐;康亚璇;庞晓明;李颖岳;

• 1:北京林业大学生物科学与技术学院·林木育种国家工程实验室·林木与花卉育种教育部重点实验室

摘要(Abstract)：

【目的】克隆‘冬枣’(Ziziphus jujuba Mill.‘Dongzao’)FT基因,预测其功能,明确该基因在‘冬枣’不同组织器官和发育时期的表达模式。【方法】以‘冬枣’为试材,分离克隆‘冬枣’FT同源基因全长序列,命名为Zj FT,运用生物信息学软件对该基因序列进行生物信息学分析;利用QRT-PCR探究了‘冬枣’FT基因在不同组织以及叶片全生育期的表达模式。【结果】‘冬枣’FT基因编码区为525 bp,共编码了174个氨基酸;理论PI是9.68,分子质量为18.112 ku;系统进化树分析表明,该氨基酸序列与苹果Md FT基因亲缘关系最近,其次为黑杨Pn FT、荔枝Lc FT、葡萄Vv FT,属于PEBP家族;Zj FT各个氨基酸残基对应的二级结构有α-螺旋(32.7%)、延伸链(23.9%)、β-折叠(8.18%)和无规则卷曲(35.22%),3D结构中有2个α-螺旋和5个β-折叠;Zj FT在枣树不同生长阶段的各个器官中都有所表达,在果实中表达量最高。【结论】从‘冬枣’中成功克隆FT基因,Gen Bank登录号为KR872844,该基因与其他植物的FT蛋白具有高度的保守性;FT基因在枣生殖器官中的表达量高于营养器官,在果实中表达量最高,其次为花;该基因在全年叶片不同月份的表达量随月份降低,呈现逐月下降的趋势。

关键词(KeyWords)： ‘冬枣’;花发育;FT基因;克隆;表达

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项(2016ZCQ05);; 国家自然科学基金(31400578)

作者(Author): 李翔;侯璐;康亚璇;庞晓明;李颖岳;

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参考文献(References)：

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