Description
In Arabidopsis, lateral roots (LRs) originate from pericycle cells located adjacent to vascular tissues, deep within the primary root. Consequently, new LR organs have to emerge through several overlying tissues. Eight stages of LR primordium development have been defined, with stage I representing a single layer of primordium cells generated by the first round of asymmetric divisions and stage VIII defining primordia that have fully emerged through the outer cell layers. To identify novel genes involved in LR development, we generated a transcriptomic time course dataset encompassing each LR developmental stage from pre-initiation to post-emergence.