Page 671 - e-Book

IAA Tryptophan Phenols
Plant Parts
(µg/g fresh tissue)

Nodule 22.32 1762 1538

Root 3.12 352 962

Critical Difference at P = 0.05 0.07 3.05 8.47

Table 2: Maximum level of Indole acetic acid (IAA), tryptophan and total phenol found in
nodules and roots of Vigna radiata (L.) R. Wilczek.

(IAA, tryptophan and total phenol were estimated colorimetrically)

Plant parts IAA-oxidase Peroxidase
(mg IAA oxidised/mg (mg IAA oxidised/mg

protein/h) protein/h)

Nodule 11.30 7.75

Root 38.25 10.20
Critical difference at P=0.05 0.22 0.13

Table 3. Catabolism of IAA by IAA-oxidase and peroxidase in nodules and roots of Vigna

radiata (L.) R. Wilczek.
Plant parts Peroxidase Polyphenol-oxidase

(mg purpurogallin (mg purpurogallin formed/mg
formed/mg protein/min) protein/min)

Nodule 157.24 136.36

Root 188.48 152.12

Critical difference at 2.05 1.10
P=0.05

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