Content of gibberellic acid in apical parts of male and female thalli of Chara tomentosa in relation to the content of sugars and dry mass

Abstract

The contents of gibberellic acid (GA3), glucose and starch, and dry mass in four nodes of apical parts of male and female thalli of Chara tomentosa were measured. The GA3 concentration was about 4 times higher in male than in female thallus and about 10 times higher in the first node than in the next three nodes of both thalli. The apical part of male thallus contains 2.5 times less glucose and 1.7 times less starch than female one. The average amount of dry mass of male and female thallus was similar: 9.9 and 9.8 % of fresh mass. The findings of this investigation demonstrate the interdependence of gibberellic acid and sugars in development of male and female Chara tomentosa thalli.