《Science丨YABBY和分化的KNOX1基因塑造茎中的节和节间》

  • 来源专题:战略生物资源
  • 编译者: 李康音
  • 发布时间:2024-06-19
  • 2024年6月13日,日本综合研究大学院大学的研究人员在Science杂志发表了题为YABBY and diverged KNOX1 genes shape nodes and internodes in the stem的文章。

    植物茎由专门进行溶质交换和伸长的节和节间组成。然而,它们之间的界限并不明确,这些基本单位是如何产生的也仍不清楚。

    在节和节间清晰的水稻中,研究人员发现,I类结1样同源染色体(KNOX1)的一个亚支系负责芽分生组织的不确定性,通过抑制叶片发育的YABBY基因和另一个节特异性KNOX1亚支系的基因,限制了节的分化并允许节间的形成。YABBY 促进节的维管分化并限制茎的伸长。YABBY 和节点特异性 KNOX1 基因指定了叶枕,叶枕进一步完善了节点结构,从而实现向心力。值得注意的是,这种 KNOX1 亚群组织是种子植物所特有的。研究人员认为,节和节间是由 YABBY-KNOX1 交叉调节指定的不同领域,它们在早期种子植物中发生了分化。

  • 原文来源:https://www.science.org/doi/10.1126/science.adn6748
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