A Genetico-Physiological Study on the Formation 
of Anthocyanin and Brown 
Pigments in Plants. 
By 
Isaburo Nagai. 
Imperial Agricultural Experiment Station, Japan. 
With Plate I and two Text-figures. 
CONTENTS. 
Introduction. 
[ . Physiological Study. 
1. The Action of Oxidizing Enzymes on Anthocyanins. 
2. The Action of Oxidizing Enzymes on Flavones. 
3. Flavone Derivatives as Chromogenic Substances of Eeddish Brown Plant Pigments 
(Phlobaphenes). 
4. Bole of Oxygen in the Formation of the Chromogenic Substance and Anthocyanin. 
5. A Group of Substances of Unknown Chemical Nature As the Chromogen of Anthocy¬ 
anins and Eeddish Brown Pigments. 
II. Genetical Study. 
1. The Mode of Inheritance of Anthocyanin and Brown Pigment in the Awn and Other 
Parts of Oryza saliva. 
(a) Colour Types of the Awn. 
(b) The Cross : Brown x Faint Yellow. 
(c) The Cross : Bed x Purple. 
(d) The Eelation Between the Colour of the Grain and the Paleas. 
2. The Mode of Inheritance of Anthocyanin and Brown Pigment in the Seed Coat of 
Glycine soja. 
(a) Colour Types of the Seed Coat. 
(b) The Cross : Blue Tinged Yellow x Brown and the Eeciprocal. 
(c) The Cross : Buff x Black. 
[Jour. Coll. Agric., Yol. VIII, No. 1, 1921.] 
