Fig. 6

Phytohormone levels observed in tomato cuttings during AR formation. Zeatin (a-c), abscisic acid (ABA) (d, e) and salicylic acid (SA) (g-i) levels were quantified in tomato shoots during AR formation 0–120 h post excision via LC-MS, under the following treatments: control, 10 μM IAA or 10 μM NPA. Hormone levels were determined in shoots: submerged and unsubmerged stems, and leaves for each treatment. Data are means and standard errors, of 5 shoots, and the experiment was repeated 2 times. Different letters in the same index means the significant difference among samples at each time point under the control, NPA as well as IAA, separately (P< 0.05)