PLANTS IN GLYCOCOLL SOLUTIONS 
I8I 
limiting factor. Unlike plants react differently to physiologically 
limiting water conditions. The variations are inherent, — peculiarities 
of the growth capacity and the metabolism of plants. 
6. Plants may show a loss in weight but not a corresponding loss 
in the amount of water transpired; on the other hand, increase in 
growth may take place with little or no change in transpiration. 
7. Changes in body weight, if taken as the measure of growth, 
may be pronouncedly altered by the retention of water as well as by 
the deposition or removal of reserve materials in the tissues. The 
Table V 
Transpiration and Growth of Vaccinium oxycoccus in Glycocoll Solutions 
December 17, 1913, to January 17, 1914 
Culture solution 
1. Distilled water. . . 
2. w/800 glycocoll. . . 
3. w/3,200 glycocoll. 
4. w/6,400 glycocoll. 
5. w/i2,8oo glycocoll 
Amount of water in grams 
Absorbed Transpired Retained 
4-95 
4- 35 
9-30 
7-85 
7-25 
9.80 
7.65 
7-85 
5- 30 
6.30 
4-35 
4-30 
8.70 
7.70 
7.05 
9.20 
7.10 
7.80 
4.90 
6.30 
0.60 
0.05 
0.60 
0.15 
0.20 
0.60 
0.55 
0.05 
0.40 
0.00 
Gain or loss in weight 
of plants (in grams) 
0.65 
0.75 + 
0.80 + 
0.60 + 
0.40 + 
New roots with mycorrhiza and devoid of roothairs; short, dense clusters in 
weaker solutions. Root growth best in solution No. 5. Atmospheric conditions as 
in Table I. 
Table VI 
Transpiration and Growth of Vaccinium oxycoccus in HCl Solutions 
November 23 to December 17, 19 13 
Culture solution 
1. Bog water. . . 
2. w/400 HCl. . , 
3. w/3,200 HCl. 
4. w/6,400 HCl. 
5. w/i2,8oo HCl 
Amount of water in grams 
Absorbed Transpired Retained 
3- 45 
6.15 
6.20 
5.10 
4- 85 
3.10 
5.95 
6.00 
4-85 
445 
0-35 
0.20 
0.20 
0.25 
0.40 
Gain or loss in weight 
of plants (in grams) 
0.35 
0.20 
0.20 
0.25 
0.40 
Plants in bog water with long, thin roots, devoid of roothairs. Root growth 
retarded in strong acid solutions; in weaker solutions the rootcap consists of loose 
tissue, as if gelatinized. Atmospheric conditions as in Table VHI. 
