A GENETICO-PHYSIOLOGICAL STUDY ON THE FORMATION ETC. 
19 
Table 7. 
Chromogen content of the plant extracts. 
Name of plant 
Part examined 
Relative value of chromogens 
P F 
Cryptomeria japonica 
Green leaf 
I 
IV 
99 99 
99 99 
Green bark 
Wood & pith 
(young twig) 
I+ + + 1 
IV 
IV + 
+ 
Finns parvifolla 
Green leaf 
1+ 
V 
9» 99 
Bark 
I 
V 
Platanus occidentalis 
Bark 
1+ + + 
IV- 
99 99 
Wood 
IV 
— 
Aesculus turbinata 
Bark 
1+ 
+ 
99 99 
Wood 
IV 
— 
In the immature green seed of different legumes, the chromogen can 
readily be detected, so that it is possible to predict whether the seeds may 
be coloured or not in adult condition. So far the writer has found, the 
colourless or white seeds show practically no chromogen reaction when they 
are still young, the relation of the pigment to the chromogen being quite well 
marked. 
Table 8. 
Chromogen content of the extracts of green seed of the 
leguminous plants. 
Name of plant 
Part 
examined 
Colour of seed 
when ripe 
Relative value of 
chromogens 
P F 
Ind ijofera pseudol Indoria 
Seed 
Brown 
I 
— 
Vicia sativa 
9* 
99 
11+ 
— 
Pisum sativum 
99 
99 
1 + 
+ 
Phaseolus vuhjaris 
99 
“ Kotenashi ” 
99 
White 
— 
— 
*• Ohtenashi ” 
99 
99 
— 
— 
“ Kianeko ” 
99 
Yellow pied 
IV 
+ 
1. -f- sign denotes the deeper colour than that of the colour scale stated. The sign alone 
denotes the trace of colour or below YI. 
