Staining of tomato plant parts; root and collar region with fast green and safranin. (A) presence of R.H, root hair; Co, collenchyma; Pf, periphloematic fibers; Ep, epidermis; Cp, cortical parenchyma;(B) X1, primary xylem; X2, secondary xylem; Xf, xylem fibers; Am, amyloplasts;(C) P1, primary phloem; P2, secondary phloem; Cb, cambium;(D) whole healthy root section.