CONTENTS ix 



PAGE 



CHAPTER VIII. THE SIGNIFICANCE or ANTHOCYANINS . . 126 



Biological Significance Physiological Significance Light-screen 

 Hypothesis Pringsheim's and Reinke's Results on Bleaching of Chloro- 

 phyll Kerner's Suggestions as to Uses of Anthocyanin Evidence of 

 Engelmann and Reinke against Light-screen Hypothesis Pick's Hypo- 

 thesis of Protection of Diastase Stahl's Hypothesis of Conversion of 

 Light Rays into Heat Ewart's Criticism of Stahl Investigation of 

 Internal Temperature of Red Leaves by Smith. 



PART II 



ANTHOCYANINS AND GENETICS 

 CLASSES OF VARIATION 145 



Kinds of Colour- variation Different Series in Different Genera 

 Variation to Albinism Red Varieties Soluble- and Plastid- Yellow 

 Varieties The Cream Variety The Blue Variety Deep and Pale 

 Varieties Coloured Varieties from Inhibited Types Variation in Nature. 



DETAILS OF CASES OF MENDELIAN INHERITANCE IN COLOUR- 

 VARIETIES 155 



Details of Colour-inheritance in more Important Cases In Antir- 

 rhinum, Lathyrus, Matthiola, Mirabilis, Phaseolus, Pisum, Primula, 

 Solanum, Zea, and many others. 



CONNECTION OF FLOWER-COLOUR WITH THE PRESENCE OF ANTHO- 

 CYANIN IN VEGETATIVE ORGANS, FRUITS AND SEEDS 180 



Examples from Cases Investigated. 



HETEROZYGOUS FORMS 183 



Examples from Cases Investigated. 



COLOUR FACTORS IN REDUPLICATION SERIES .... 185 



Phenomenon of Coupling and Repulsion in Lalhyrus and Primula 

 Colour-factors involved. 



PATTERN IN COLOUR VARIATION 188 



Examples from Cases Investigated Differentiation of Kinds of 

 Pattern. 



