早期陆地植物Physcomitrium patens的 terpenoid前体路径中的转录和功能表征
A Horn1,2,3, Y Lu3, F J Astorga Ríos3,4
1ITQB NOVA-Instituto de Tecnologia Química e Biológica António Xavier, Oeiras, Portugal.
Plant biology (Stuttgart, Germany)
|November 27, 2024
概括
在Physcomitrium patens中,1-deoxy-D-xylulose-5-phosphate synthase (DXS) 基因家族被保存,但显示出差异性的基因调节. 这种规则允许工厂微调DXS水平以应对环境条件,如盐应激.
科学领域:
- 植物生物化学和分子生物学
- 进化基因组学是进化的基因组学.
- 代谢学 代谢学 代谢学
背景情况:
- 异类是植物特种代谢物的庞大群体,对各种生物功能至关重要.
- 1-deoxy-D-xylulose-5-phosphate合成酶 (DXS) 是异oprenoid生物合成中的一个关键速度限制酶.
- DXS基因家族的进化扩张与植物的代谢复杂性有关,但它在植物中的作用仍然未被探索.
研究的目的:
- 为了研究DXS基因家族在植物中的进化扩张,重点关注Physcomitrium patens.
- 分析P. patens中DXS家族的组织特异性,发育和环境反应.
- 了解盐应激对类生物合成和DXS基因调节的影响.
主要方法:
- 遗传学分析,以评估DXS家族在植物和P. patens.中的演变.
- 在各种条件下研究DXS基因表达的转录组概况.
- 代谢药物用于监测类生物合成变化.
- 功能补充测试用于验证酶活性.
- 同表达网络分析以确定基因调节关系.
主要成果:
- 遗传学分析表明,P. patens中DXS家族的结构保存,与其他类植物不同.
- 四个P.patens和DXS副本都显示出功能活动.
- 比较的转录学揭示了DXS副本的组织和条件特定的表达模式.
- PpDXS1D对盐应激表现出特定的反应,与下游代谢途径的流量增加相吻合.
- 同表达网络为每个DXS副本突出了不同的基因关联,而PpDXS1D网络富含应激反应基因.
结论:
- 在P. patens中,DXS基因家族在进化上是保守的,但表现出差异性的转录调节.
- 这种监管差异使得P. patens能够调节DXS水平,以应对非生物压力等环境线索.
- 这些发现提供了关于新陈代谢调节和应激耐受性 bryophytes 的适应策略的见解.
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