使用T2T基因组对亚麻bZIP基因进行全基因组分析,揭示了非生物应激作用
Hang Wang1,2, Jianyu Lu1,2, Shuyao Li1,2
1Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China.
iScience
|February 3, 2026
概括
亚麻植物拥有99个基本氨酸拉链 (bZIP) 基因,对生长和应激反应至关重要. 特定的bZIP基因,LubZIP15和LubZIP45,在寒冷,干旱和盐条件下表现出增加的活动.
科学领域:
- 植物分子生物学 植物分子生物学
- 基因组学就是基因组学.
- 植物生理学 植物生理学
背景情况:
- 基本氨酸拉链 (bZIP) 转录因子调节植物的重要过程,包括生长,发育和应激反应.
- 亚麻 (Linum usitatissimum L.) 中的bZIP基因家族的特征不太清楚,这限制了对其在植物适应中的作用的理解.
研究的目的:
- 在亚麻中对bZIP转录因子家族进行全面的全基因组识别和表征.
- 研究亚麻bZIP基因在对非生物压力的反应中的潜在作用.
主要方法:
- 使用端粒对端粒 (T2T) 和Longya10参考基因组对bZIP基因进行全基因组范围的鉴定.
- 对促进子cis元素,基因复制事件和miRNA目标的分析.
- 转录组分析和RT-qPCR用于评估压力条件下的基因表达.
主要成果:
- 在T2T基因组中确定了99个bZIP基因,在Longya10基因组中确定了92个bZIP基因,分为12个保存的子家族.
- 发现了与植物激素信号传递和非生物压力相关的促进子cis元素.
- 发现了大规模细分重复的证据,推动了bZIP家族的扩张,并将Lus-miR398确定为潜在的调节器.
- 在叶子中观察到大多数bZIP基因的高表达和在寒冷,干旱和盐分压力下显著诱导LubZIP15和LubZIP45.
结论:
- 这项研究提供了亚麻bZIP家族的基础基因组全方位分析.
- 确定了特定的bZIP基因 (LubZIP15,LubZIP45),在非生物应激耐受性中起着重要作用,为作物改善提供了目标.
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