MpmiR319 促进了肝草 (Marchantia polymorpha) 的gemma/gemma杯的形成
Kazutaka Futagami1, Masayuki Tsuzuki1,2, Mika Yoshida1
1Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan.
Journal of experimental botany
|April 9, 2025
概括
微RNAs (miRNAs) 调节植物的发育. 在肝中,miR319通过准生殖结构发育必不可少的MpRKD来控制gemma杯和gemma形成.
科学领域:
- 植物分子生物学 植物分子生物学
- 发育生物学是发展生物学.
- 遗传学 遗传学是一种遗传学.
背景情况:
- 微RNAs (miRNAs) 是植物基因表达的关键调节者.
- 在陆地植物中保存了miR159/319家族,在双叶植物和单叶植物中具有很好的特征作用.
- 在植物中miR159/319的功能,比如模型肝草Marchantia polymorpha,仍然在很大程度上是未知的.
研究的目的:
- 为了研究miR319在模型 bryophyte Marchantia polymorpha.pha.发展中的生物功能.
- 确定MpmiR319的目标基因并阐明它在生殖结构形成中的作用.
主要方法:
- 使用CRISPR/Cas9基因编辑,在MpMIR319a和MpMIR319b位点中产生突变.
- 产生了抗miR319的目标基因结构 (mMpRKD,mMpR2R3-MYB21).
- 使用MpRKD促销器-GUS融合进行了记者基因测试.
主要成果:
- 缺乏MpmiR319的突变者表现出减少的gemma杯和gemma形成.
- 引入mMpRKD,但不是mMpR2R3-MYB21,拯救了gemma/gemma杯少的表型.
- 在gemma杯结构中检测到MpRKD表达.
- 双重突变的mir319a/mir319b显示了改变的gemma杯大小和排列.
结论:
- MpmiR319在调节Marchantia polymorpha中的gemma杯和gemma发育方面发挥着至关重要的作用.
- MpRKD被确定为MpmiR319的直接标,调解其在生殖结构形成中的功能.
- miR319与MpRKD合作,确保宝石杯和宝石杯的正确形成和定位.
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