Fig. 1

Comparison of the anatomical structure ofRaphanus raphanistrum(a) andRaphanus sativus(b) roots (30 day old plants). xyI—primary xylem, xyII—secondary xylem, ca—cambium, ph—phloem, co—cortex, vs—vessels, mxp—mechanical xylem parenchyma, sxp—storage xylem parenchyma, rr—radial ray