Department of Botany, University of Burdwan, Golapbag, Burdwan-713104
The levels of free phenols (total and monohydroxy) and their polymerization by peroxidase and polyphenol oxidase varied seasonally, and in between the nodules and roots of Butea monosperma and Pterocarpus marsupium. The nodules and roots contained more free phenols during rainy season and lesser in the winter. Polymerization of phenols was less in the rainy season and was increased gradually afterwards. Higher levels of total, monohydroxy and polymerized phenols were recorded in the nodules than the roots of P. marsupium and vice versa in those of B. monosperma. Phenol oxidases of some tissues did not show opposite relations with phenols throughout the year. The free phenol levels changed parallel to IAA levels and nitrogenase activity in the nodules. Leghaemoglobin content of nodules did not change significantly throughout the year.
