432 
ALFRED DACHNOWSKI 
Table XI 
Transpiration and Growth of Tomato Cuttings in HCl w/8oo with Various 
Equimolecular Salt Solutions 
Values in grams for 20 days 
Solution 
1. H2O 
2. HClw/800 
3. HCl w/800 + KCl w/800 
4. HCl w/800 + NaCl M/800 
5. HCl w/800 + CaCl2 w/800 
'6. HCl w/800 -f K2SO4 w/800 
7. HCl w/800 + Na2S04 w/800. .. . 
8. HCl W800 + CaS04 w/800 
9. HCl «/8oo + KNO3 w/800 
10. HCl w/800 + NaNOs w/800.. . . 
11. HCl w/800 + CaN03 W800 
12. HCl w/800 + C12H22O11 w/800. . 
13. HCl w/800 + C6H12O6 w/800. . . . 
14. HCl w/800 + C2H5NO2 W800. . 
5. A further fact of interest from a study of the physiological reac- 
tions of the different solutions toward plants here employed and 
growing under the same group of external conditions is the observation 
that conceptions of colloidal swelling or a differential osmotic pressure 
in cells and tissues are in themselves inadequate to account for the 
varying amounts of water retained by plants, and can not be con- 
sidered the fundamental factors in absorption. The values of the 
quantity of water retained do not increase progressively with every 
increase in the concentration of acid or alkali in the solution sur- 
rounding the plants. This leads to the conclusion that the influence 
of acids and alkalies may be accounted for on the basis of their hydro- 
lyzing power upon the various colloidal and other constituents within 
the cells. The diffusion of food constituents of seeds out of the cells 
into the solution surrounding them does not permit an interpretation 
of the variability in their water content on the basis of differences in 
osmotic pressure, or from the point of view of that series of physico- 
chemical phenomena designated as colloidal. Both are unquestionably 
involved and of importance in the general problem of the water content 
of plants, but they may well represent only a phase of that greater 
series of phenomena which is included under the term of hydrolytic 
reactions. 
Quantity of Water 
Gain or 
Extent of 
Loss in 
Weight 
Chemical 
Weight 
of Roots 
Ab- 
Tran- 
Changes 
within 
Tissues 
sorbed 
spired 
Retained 
of Plants 
32.250 
30.680 
1.570 
1. 1 40 
-0.430 
0.185 
8.600 
9.480 
-0.880 
— 1.040 
— 0.160 
0.000 
24.100 
23.580 
0.520 
0.190 
-0.330 
O.OIO 
21.650 
21.080 
0.570 
0.450 
— 0.120 
0.014 
20.650 
19.950 
0.700 
0.490 
— 0.210 
0.018 
23.940 
23.360 
Q.580 
0.315 
-0.265 
0.019 
27.530 
26.700 
0.830 
0.500 
— 0.320 
O.OIO 
28.700 
27.825 
0.875 
0.630 
-0.245 
0.020 
28.530 
28.290 
1.340 
1. 105 
-0.235 
0.020 
45-075 
43.270 
1.805 
1.350 
-0.455 
0.018 
35.270 
33.850 
1.420 
1. 100 
— 0.320 
0.028 
15.010 
14.950 
0.060 
-0.305 
-0.245 
O.OIO 
21.530 
20.960 
0.570 
0.360 
— 0.210 
0.015 
40.480 
38.820 
1.660 
1.345 
-0.315 
0.200 
