一个共享的基因驱动横向根的发展和根结的共生路径
Takashi Soyano1,2,3, Yoshikazu Shimoda4, Masayoshi Kawaguchi5,2
1National Institute for Basic Biology, Nishigonaka 38, Myodaiji, Okazaki, Aichi, 444-8585, Japan. soyano@nibb.ac.jp makoto.hayashi@riken.jp.
Science (New York, N.Y.)
|November 23, 2019
概括
豆类的共生依赖于固定的树根菌. 这项研究显示,NUDULE INCEPTION (NIN) 调节ASL18/LBD16a和NF-Y,并结合一个侧向根系的结节发育途径.
科学领域:
- 植物生物学
- 分子遗传学
- 共生相互作用
背景情况:
- 豆类通过与固植株的共生形成根结.
- 菌会触发皮质细胞分裂,从而形成细菌殖民的原始结节.
研究的目的:
- 调查NUDULE INCEPTION (NIN) 在豆类结节过程中的下游基因调节中的作用.
- 阐明NIN控制皮质细胞分裂和结节器官生成的分子机制.
主要方法:
- 研究了日本的NIN转录因子的监管目标.
- 分析了*ASYMMETRIC LEAVES 2-LIKE 18/LATERAL ORGAN BOUNDARIES DOMAIN 16a* (ASL18/LBD16a) 和*Nuclear Factor-Y* (NF-Y) 的子单位的功能.
- 使用了*L. japonicus daphne*突变体,表达方式减弱.
主要成果:
- NIN直接调节*ASL18/LBD16a*和*NF-Y*子单位的表达.
- 已知*ASL18/LBD16a*的正向因子参与非豆类植物的侧向根部发育.
- *ASL18a* 和 *NF-Y* 的同时表达部分挽救了 *daphne* 突变的结节缺陷.
结论:
- 转录因子NIN整合了其作用下游的侧根发育途径.
- ASL18a和NF-Y一起作用,调节豆类中的结节器官生成.
- 这项研究揭示了连接横向根发育途径与共生结节形成的保存机制.
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