BLADE-ON-PETIOLE genes temporally and developmentally regulate the sheath to blade ratio of rice leaves
BLADE-ON-PETIOLE genes temporally and developmentally regulate the sheath to blade ratio of rice leaves
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DOI：
10.1038/s41467-019-08479-5
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发表时间：
2019-02-06
影响因子：
16.6
通讯作者：
Kyozuka, Junko
中科院分区：
文献类型：
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作者：
Toriba, Taiyo;Tokunaga, Hiroki;Kyozuka, Junko
轴的形成是发育生物学的一个基本问题。植物叶子的轴形成和图案对于形态和作物生产力至关重要。在这里，我们揭示了水稻叶片近远端图案的基础，它由近端鞘、远端叶片和这两个区域之间形成的边界器官组成。对拟南芥 BLADE-ON-PETIOLE1 (BOP1) 基因的三个水稻同源物的分析表明，OsBOP 激活近端鞘分化并抑制远端叶片分化。 OsBOP 的时间表达变化是导致鞘与叶片比例发育变化的原因。我们进一步确定幼年阶段鞘与叶片比例的变化是由 miR156/SPL 通路控制的，该通路改变了 OsBOP 的表达水平和模式。 OsBOP 对于边界器官的分化也至关重要。我们提出，OsBOPs（近端-远端模式的主要调节因子）控制着水稻叶片叶鞘与叶片比例的时间变化。
Axis formation is a fundamental issue in developmental biology. Axis formation and patterning in plant leaves is crucial for morphology and crop productivity. Here, we reveal the basis of proximal-distal patterning in rice leaves, which consist of a proximal sheath, a distal blade, and boundary organs formed between these two regions. Analysis of the three rice homologs of the Arabidopsis BLADE-ON-PETIOLE1 (BOP1) gene indicates that OsBOPs activate proximal sheath differentiation and suppress distal blade differentiation. Temporal expression changes of OsBOPs are responsible for the developmental changes in the sheath: blade ratio. We further identify that the change in the sheath: blade ratio during the juvenile phase is controlled by the miR156/SPL pathway, which modifies the level and pattern of expression of OsBOPs. OsBOPs are also essential for differentiation of the boundary organs. We propose that OsBOPs, the main regulators of proximal-distal patterning, control temporal changes in the sheath: blade ratio of rice leaves.