1920] 
DUGGAR—VALUE OF FOOD RESERVE IN COTYLEDONS 295 
TABLE II 
THE EFFECTS OF THE EXCISION OF THE COTYLEDONS UPON THE GROWTH 
OF CANADA FIELD PEAS 
Total | Gr. wt. | Gr. wt. P à 
. wt. | of t f roots | °F “Bip 
Cult. Culture e if adc | rel. to d 
no. medium excision cor. cult., H 4 
1 Ce cult. 
10 plants, weight in grams £x 
1 Immediately 10.26 4.97 5.29 100 46 
2 Solution C After 2 days 14.90 8.75 6.15 100 67 
3 | Solution C |After 7 days | 17.50 | 11.64 | 5.86 | 100 79 
4 Control, uncut| 22.11 | 14.40 7.71 100 100 
5 | Solution C |Immediately | 12.28 7.38 4.90 120 56 
6 + After 2 days 16.90 | 10.40 6.50 113 76 
7 glycocoll [After 7 days 19.81 | 13.93 5.88 113 90 
8 (M/100) ¡Control, uncut| 19.29 | 13.45 5.84 87 87 
9 | Solution C |Immediately 6.57 3.92 2.65 64 30 
10 + sodium ¡After 2 days 11.04 6.68 4.36 74 50 
11 |asparaginate |After 7 days 16.44 | 10.09 6.35 94 74 
12 (M/100) |Control, uneut| 17.26 11.52 5.74 78 78 
13 | Solution C |Immediately 7.53 4.62 2.91 73 34 
14 + After 2 days 10.69 6.92 2 e i 72 48 
15 alanin  |After 7 days 16.56 | 10.45 6.11 95 75 
16 (M/100) |Control, uncut| 17.86 | 12.00 5.86 81 81 
17 | Solution C |Immediately 14.38 7.29 7.09 140 65 
18 + sodium |After 2 days 18.32 10.13 8.19 123 83 
19 | nucleinate [After 7 days 22.85 | 14.57 8.28 131 103 
20 |(% per cent) |Control, uncut] 25.43 | 15.09 | 10.34 115 115 
* Per cent relative to corresponding culture, with respect to the time of excision 
of cotyledons, in the unmodified solution C. 
paper (Duggar, '20) called solution C, which is one of the “best” 
combinations developed by Livingston and Tottingham ('18), 
and this solution has been shown to contain a favorable concen- 
tration of potassium nitrate for the growth of wheat and peas. 
Nevertheless, in spite of the fact that at the time of the excision 
of the cotyledons (even in those excised after only 2 days) there 
was considerable green leaf tissue in the seedlings, still the 
growth was weak, and at the end of 24 days the plants weighed 
less than one-half the control. The addition of glycocoll and 
of sodium nucleinate increased the growth quantities materially 
in the corresponding cultures, while the addition of sodium 
asparaginate or alanin was slightly depressing. The depressing 
