Figure 1

Root hairs as they appear on the primary roots of seedling plants. (A) Diagram to illustrate the root systems of cereal crops. Multiple crown roots (CRs) initiate first and second order lateral roots (LRs); single cell epidermal cells on the surfaces of these various root types can elongate to form root hairs (RHs). Scale bar represents 0.5 mm. (B) In textbooks and other literature, root hairs are frequently depicted as being present primarily in the “root hair zone”, a region proximal to the root tip.