7-t 



THE BOTANICAL MAGAZINE. 



[Vcl. XXXI. No. 363. 



Table VII. 



ec anthocyanin. 

 extract*. 



cc H 2 2 (1:10) 

 added. 



gm. charcoal 

 added. 



no of minute required for 



complete decolouri- 



zation. 



3 

 3 

 3 

 o 



0.5 

 0.5 

 0.5 

 



0.02 

 0.01 











4 



17 



1154 



co 



* From the chrysanthemum flower. 



The assumption seems justified that the oxidation and 

 reduetion processes go on simultaneously in the living cell, for 

 as much as we are aware that reduction must occur wherever 

 oxidation does. Yet no definite evidence is at hand to warrant 

 us in assuming that those processes to which the chromogens 

 and anthocyanins are vitally concerned, are carried on solety 

 by the enzyme activities. It may be worth while to mention, 

 however, that the reducing enzyme which attacks methylene blue 

 and converts it to a colourless leuco-compound, is accompanined 

 by the oxidising enzymes which attack guaiaeum, a-naphtol, 

 benzidine and anthocyanins in the plant juice, such as of 

 Tricholoma Shiweji, Lactaria Hatsudake^ and others." 



It is my pleasure to acknowledge my indebtedness to Dr. 

 H. Ando, Prof. K. Shibata and Prof*. Y. Shibata for facilities 

 and advices. 



Feb. 1917. 



1 Gycerine extract is used. 



2 Cf. Habdek, A. and Noruis, K. V.:Bioch. J cur 9:330. 1915. Haiiden, 

 A. and ZlLVA, S. S. : Bioch. Jour. 9 377, 1915. 



