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 found that two Syntaxin 1 paralogs in the liverwort, Marchantia polymorpha, are distinctly targeted to forming cell plates and the oil body, suggesting these structures share some developmental similarity. Oil body formation is under the regulation of an ERF/AP2-type transcription factor and loss of the oil body increased M. polymorpha herbivory. These findings highlight a common strategy for the acquisition of organelles with distinct functions in plants, via periodical switching in secretion direction depending on cellular phase transition.

中文翻译：

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切换植物中细胞器获取的分泌途径方向

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，地母草中的两个Syntaxin 1旁系同源物，多形的Marchantia，被明确地靶向形成细胞板和油体，表明这些结构具有一些发育相似性。油体的形成受ERF / AP2型转录因子的调控，并且油体的损失增加了多形分支杆菌的食草性。这些发现突显了在植物中获得具有独特功能的细胞器的通用策略，