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OpenSimRoot models and real root systems. (a–d) Single roots of type I (fibrous), type II (transition roots), type III (early storage roots), and type IV (storage roots). (e) A simple root system consisting of early storage roots only; (f) a more complex root system consisting of three root types; (g–j) 4 different root systems excavated in 2-week intervals and imaged with the video acquisition setup.
