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Abstract
RESEARCHES ON ROOT APEX MERISTEM. II. RIBOFLAVINE COENZYMES. — FMN and FAD contents have been measured (by the method of BURCH et al.) in the roots of etiolated pea seedlings. It has been found that FMN and FAD content is higher, when referred to fresh weight, in the 2 mm. apical segment than in the next 2–4 mm segment.
On a protein basis, FMN is more abundant in the 2–4 mm segment than in the 0–2 mm apical segment.
The opposite is true for FAD (see table). The apical (meristematic) segment is therefore characterized by a higher FAD/FMN ratio (its value is 1) than the next 2–4 mm segment, where the ratio FAD/FMN is 0.29.