Undergraduate research · Root anatomy
Cell size across the root cortex is not arbitrary. It follows the same shape in root after root, and so far in every species measured.
The average pattern across 1,708 roots. Cells start small beside the stele, reach their largest about a third of the way out, then shrink toward the outside before lifting again at the epidermis.
Move the sliders and watch a cross-section rebuild itself in real time. Load a real root, or push the pattern past what any root could actually be.
Open the model ReferenceEvery stage behind the numbers, from raw microscopy through cell segmentation, cell file detection and curve fitting, followed on one worked example.
Read the methodsRoots do more than anchor a plant. They control how much carbon it sends underground, how much soil it can reach, and how well it takes up water and nutrients, while also shaping the microbial community living around them, making root structure a key factor in drought tolerance, nutrient efficiency, and soil health.
Across large populations of maize roots, this project has found that cortical cell size follows a strikingly consistent pattern moving outward from the stele, a “cortical cell pattern” that appears to be a fundamental feature of root anatomy rather than a random byproduct of growth. This pattern holds not just within maize but across multiple species, suggesting it may be a universal feature of root structure, one worth understanding for what it could reveal about the traits that matter most for crop resilience.