Table 1.

IAA Concentration Determines the Frequency of Leaf Induction on Tomato NPA Pins

Number of Effects (%)
TreatmentaNo. of TreatmentsBulgingbPrimordiumc
Lanolin only1800
0.1 mM IAA185 (27)3 (17)
0.3 mM IAA1810 (55)6 (33)
1.0 mM IAA1715 (88)9 (53)
3.0 mM IAA1817 (94)12 (67)
10 mM IAA1818 (100)14 (78)
30 mM IAA1816 (88)11 (61)
  • a Apices were cultured on 10 μM NPA for 17 days. The resulting pins were locally treated with IAA at the flank. Apices were examined 8 days after treatment with IAA.

  • b Apices formed a local bulge at the site of treatment.

  • c Apices in which the local bulge developed into a leaf primordium.