Figure 3.

Modulation of root sensitivity to cytokinin but not to ethylene in pac mutants. (a) Root length analysis of pac mutants. Root growth decreased significantly in pac22, pac19 and pac21 (subgroup A) and pac8 and pac9 (subgroup B), but roots elongated in pac15 (subgroup A), pac4, pac17, pac11, pac16 (subgroup C) and pac1, pac3, pac12, pac13 (subgroup D) mutants. (b) Reduced root cytokinin sensitivity in pac mutants. (c) Root sensitivity to ethylene moderately affected in pac mutants. Seven-day-old seedlings were analysed germinated on control media or media supplemented with cytokinin (0.1 µM BAP) or 1 µM ACC (*p < 0.05, n = 20 seedlings). Error bars mark standard errors.