Abstract
BELL基因是植物中普遍存在的一类基因,其编码的同源异型结构域转录因子参与调控了植物叶片、花序等多个组织的发育过程。为明确烟草BELL基因的结构和功能,通过同源序列比对和功能域分析鉴定了普通烟草BELL基因,结合系统进化和基因表达模式分析对烟草BELL基因的功能进行了初步预测。结果表明,从普通烟草基因组中共鉴定出28个NtBELLs基因,分布于15条不同的染色体上。系统进化分析表明,烟草NtBELLs基因可分为4组,每组参与调控烟草不同的发育过程。NtBELLs基因在6个烟草组织中呈现不同的表达模式,且具有明显的组织特异性。干旱和盐胁迫能显著诱导部分NtBELLs基因的表达,表明该基因家族可能参与了植物抵御非生物胁迫的过程。
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