Table 1.

NPA Blocks Lateral Root Formation in Arabidopsisa

NPA (μM)Laterals/mmPrimary Root Length (mm)
00.43 ± 0.0841.8 ± 8.2
10.09 ± 0.0643.5 ± 8.2
5030.8 ± 5.1
10027.9 ± 3.9
  • a Seedlings were grown for 11 days on Murashige and Skoog agar containing 0, 1, 5, or 10 μM NPA, after which time the number of lateral roots and the primary root lengths were measured. Results shown are the averages of 20 seedlings ±sd.