Eukaryotic cells acquired novel organelles during evolution through mechanisms that remain largely obscure. The existence of the unique oil body compartment is a synapomorphy of liverworts that represents lineage-specific acquisition of this organelle during evolution, although its origin, biogenesis, and physiological function are yet unknown. We find that two paralogous syntaxin-1 homologs in the liverwort Marchantia polymorpha are distinctly targeted to forming cell plates and the oil body, suggesting that these structures share some developmental similarity. Oil body formation is regulated by an ERF/AP2-type transcription factor and loss of the oil body increases M. polymorpha herbivory. These findings highlight a common strategy for the acquisition of organelles with distinct functions in plants, via periodical redirection of the secretory pathway depending on cellular phase transition.

真核细胞在进化过程中通过仍然不清楚的机制获得了新的细胞器。独特的油体区室的存在是艾蒿的一个同形，它代表了进化过程中该细胞器的谱系特异性获得，尽管其起源，生物发生和生理功能尚不清楚。我们发现在地艾多形花March菜中的两个旁系syntaxin-1同源物明显地针对形成细胞板和油体，表明这些结构共享一些发育相似性。油体的形成是由一个ERF / AP2型转录因子与油体的损失增加调节中号。多形体食草动物。这些发现突出了通过根据细胞相变的分泌途径的周期性重定向来获取植物中具有不同功能的细胞器的通用策略。