Effects of ABA on root elongation of the Micro-Tom wild type and the slead1 mutants. (a) Root elongation of the Micro-Tom wild type and the slead1 mutants in response to ABA treatment. Seeds were sterilized and plated on 1/2 MS plates. The plates were kept at 4°C in darkness for 2 d, and then transferred to a growth room. After 3 d, germinated seeds were transferred to control plates, or plates containing 5 and 10 μM ABA, respectively, and grown vertically for 6 d before the pictures were taken. (b) Root length of Micro-Tom wild type and the slead1 mutants. Root length of the seedling was measured 6 d after the transfer. Data represent means ± SD of at least 10 seedlings. *Significantly different from that of the wild type (p < .05) (c) Percentage of inhibition on root elongation by ABA. Root length of the seedling was measured 6 d after the transfer, and the percentage of inhibition on root elongation was calculated. Data represent means ± SD of at least 10 seedlings. *Significantly different from that of the wild type (p < .01).