Disclosing the subterranean treasury of plants

Roots are crucial for plant growth and development but, so far, their beneficial qualities have not been used in genetic engineering strategies. To exploit this missed opportunity, a thorough understanding is required of the genetic mechanisms that control gene expression in response to different cues. A global map of gene expression for the Arabidopsis root has recently been published that consists of high-resolution spatial- and temporal-expression profiles. This new dataset will be a valuable starting point for understanding the hidden organ of plants.