Fig. 4
From: A rapid and efficient in vitro regeneration system for lettuce (Lactuca sativa L.)
Visual comparison of shoots induced under increasing concentrations of AC. A significant increase in shoot count, size and growth speed over the control medium (a) was observed on media M15 (b), M17 (c), and especially M18 (d) and M19 (e). Tissue did not react on media M20 and M21 (f). All observed shoots were produced through direct regeneration, initiating development from explant tissue between days 10 and 14 (g), and grew at a moderate speed with normal morphology. All images are of cultivar ‘RSL NFR’, except for h which shows cultivar ‘Bambi’. All treatments are shown at week 7, except for g which shows direct initiation of shoot development at week 2. Shoots which may be hard to discern are marked with arrows