FREE AMINO ACIDS IN PLANT TISSUES 67 
17 18 
on “ge. OPK Me 
19 Bae: 


rae 
So ae \ 
Figs. 17-24. Tobacco, all samples from 150 mg fresh wt.; 17 and 18, strain NA, 2 months; 19 
and 20, strain N, 2 months; 21 and 22, strain NA, 4-5 months; 23 and 24, strain N, 4-5 months. 
The lines on the chromatograms point to glutamine. 
and Figs. 5 and 6, Ptertdium aquifolium (fern)*. The relative amounts of the var- 
ious detectable constituents were distinctively different for each of the different 
species studied. These findings are analogous to those in animal tissues. As in 
normal plant tissues, the patterns were characteristic for each type of tumor, 
and the various tumors differed from each other. Results are shown in Figs. 
7-16 for five malignant plant tissues: Figs. 7 and 8, Daucus carota (carrot)**, 
Figs.g and 10, Vinca rosea (pink periwinkle)***, Figs. 11 and 12, Parthenocissus 
tricuspidata (Boston ivy)§, Figs. 13 and 14, Opuntia microacantha (cactus)§§; and 
Figs. 15 and 16, Parthenocissus quingutfolia (Virginia creeper)§§§. In the animal 
The footnotes give the name of the investigator who first isolated the cultures and the place 
and approximate date on which the isolation was performed. 
* Morel, Boston, 1950. 
** Gautheret, France, 1937. 
*** White, Princeton, 1942 
§ Morel, France, 1945. 
§§ Morel, Boston, 1950. 
§§§ Morel, Boston, 1945. 
References p. 68 
