Politis, loannes. Honorary Assistant in the Botanical Institute of the Boval 

 University of Pavia . 



ON SPECIAL CELLULAR BODIES miCR FOEM ANTHOCYMINE.^/ Translation 



of: Sopra speciali corpi cellular i che formano antocianine. Atti 



1st. Bot. Univ. Pavia, II, ik: 363-376. pi. xvi-xviii. I91I+. 



Following the complete abandonment of the hypothesis as to the chloro- 

 phyllian origin of anthocyanine , many authors turned their attention to the 

 substances which they found in plant cells, especially to sugars and tannins. 

 They sought to establish the existence of some genetic relation between them 

 and the anthocyanine pigments. 



Wigand (13, ^)'^/ at first admits that the tannic substance should be 

 considered as a chromogen (generator of color) , because there seems constantly 

 to appear such a substance in the cell in which later anthocyanine pigments 

 come to be organized and also because he notes that the presence of these 

 latter coincides with that of the tannin in floral leaves and in red autumn 

 foliage . 



The conclusions reached by this author we will find more amply confirmed 

 in the works of Vt'iesner (ig) . Tschirch, Aufrecht, Kutscher, Detmer, Reinke, 

 Pick, Molisch, Dennert, Bauer (l) , etc.; in recent times in those of Overton 

 ( 12 ) Buscalioni and Pollacci (l) , Mirande (S) and Laborde (2). 



Buscalioni and Pollacci (l}. supposed, however, that to the oxidases be- 

 longed the" task of transforming certain substances in the anthocyanine pig- 

 ment, while to the reductases probably belonged the function of determining 

 their dissolution. 



*/ See also: Atti Ace. dei Lincei, xx, giugno 19II. 

 ti/ Reference is made by number to "Literature cited," near end of 

 translation. 



