The formation of nitrogen-fixing nodules on legumes requires an integration of infection by rhizobia at the root epidermis and the initiation of cell division in the cortex, several cell layers away from the sites of infection. Several recent developments have added to our understanding of the signaling events in the epidermis associated with the perception of rhizobial nodulation factors and the role of plant hormones in the activation of cell division leading to nodule morphogenesis. This review focuses on the tissue-specific nature of the developmental processes associated with nodulation and the mechanisms by which these processes are coordinated during the formation of a nodule.

中文翻译：

---

豆科植物根瘤菌感染与根瘤形态发生的协调

豆科植物固氮根瘤的形成需要根表皮根瘤菌的感染和皮层细胞分裂的开始，远离感染部位的几个细胞层。最近的一些发展增加了我们对与根瘤菌结瘤因子的感知相关的表皮信号事件的理解，以及植物激素在激活细胞分裂导致根瘤形态发生中的作用。本综述重点关注与结节相关的发育过程的组织特异性以及这些过程在结节形成过程中的协调机制。