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Table 1 Effects of tryptophan concentration on IAA production

From: Plant growth promotion using microbial IAA producers in conjunction with azolla: a novel approach

Culture samples Tryptophan concentration (%) Concentration of IAA (µg/ml)
24 h 48 h 72 h 96 h
F1 0.1 9.5 (±0.4) 9 (±0.4) 11.6 (0.8) 10.1 (±0.4)
0.3 10.4 (±0.4) 17.8 (0.8) 18.1 (±0.8) 16 (0.8)
0.5 16.4 (±0.4) 21 (±1.2) 25 (±1.6) 22.6 (±1.2)
0.7 10.4 (±0.4) 30.1 (±1.5) 30.2 (±1.6) 28 (±1.6)
0.9 21.5 (±1.2) 27 (±1.6) 32.5 (±1.5) 30.1 (±1.2)
G2 0.1 10.1 (±0.4) 16 (0.8) 19 (±0.8) 17.3 (0.8)
0.3 15.1 (±0.8) 27.5 (±1.4) 27.7 (±1.8) 30 (±1.6)
0.5 19 (±0.8) 30.1 (±1.6) 40 (±2.2) 39 (±2.1)
0.7 25.5 (±1.6) 38.5 (±2.0) 37.7 (±2.1) 43 (±2.1)
0.9 23 (±1.2) 39.5 (±2.1) 47 (2.3) 34 (1.6)
FC 0.1 5.5 (±0.4) 10 (±0.4) 10.4 (±0.4) 9.2 (±0.4)
0.3 9.5 (±0.4) 5.7 (±0.4) 25.5 (±1.6) 25.6 (±1.6)
0.5 10.9 (±0.4) 21.5 (±1.2) 30 (±1.6) 32 (±1.4)
0.7 14.5 (±0.5) 25.5 (±1.6) 40 (±2.1) 43.5 (±2.1)
0.9 14.2 (±0.5) 31 (1.7) 42.5 (2) 47.5 (2.0)
GC 0.1 2.5 (±0.4) 1.6 (±0.4) 6.5 (±0.4) 6.2 (±0.4)
0.3 3 (± 0.4) 6 (±0.5) 13.6 (0.8) 13.2 (0.8)
0.5 2.4 (±0.4) 6.6 (±0.5) 17.7 (±0.8) 19.5 (±0.8)
0.7 4.9 (±0.4) 13.5 (0.8) 20 (±1.0) 22 (±1.2)
0.9 4.1 (0.6) 16.9 (0.8) 22.5 (1.4) 26 (1.0)
  1. The IAA producing ability of all four cultures at 72 h with 0.9% tryptophan concentration was assessed by One way ANOVA and found that at 0.05 level the means are significantly different (F = 106.60588, p = 8.64269)
  2. Experiments were done in triplicates ± SD