The activity of O-methyltransferase (OMT) and the content of lignin in various organs of 12- to 14-day-old seedlings of kidney bean (Phaseolus vulgarisL., cv. Saksa) were determined. The epicotyl and hypocotyl were characterized by the highest OMT activity, and the leaves, by the lowest OMT activity. At the same time, the lignin content gradually increased in the following order: leaves < epicotyl < hypocotyl < roots. Thus, in kidney bean seedlings, there is no direct relationship between the OMT activity and the lignin content. It is suggested that lignin biosynthesis is limited by biosynthetic steps other than O-methylation of caffeic and 5-hydroxyferulic acids affected by OMT.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 10, 2004
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