18 
BULLETIN 56, HAWAII EXPERIMENT STATION 
//oo * 
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9SO 
rootstock was lower than the apical part in sucrose content, whereas 
the reverse was true in Groups 3a and 3b. The hexose content of the 
apical parts of all three groups was higher than the basal. Although 
the actual percentage of each was radically different from those of 
the rootstocks of hill 1, grown at the station, the above-mentioned 
relations held true in the latter. 
Some very distinct differences were apparent in the variations of 
the components other than sugars in hills 1 and 3. In Groups 1 and 
2, hill 1, the average total dry matter and starch content of the root- 
stock were practically the same, whereas in Group 3a they showed a 
sharp decrease. The percentage of starch in the dry matter also 
decreased. In all three 
groups the basal part 
of the rootstock con- 
tained the larger 
quantity of starch. In 
Groups 1 and 2 the pro- 
portion of starch in the 
total dry matter was 
distinctly greater in the 
basal part, whereas in 
the Group 3a rootstock 
the percentage, 
although lower than in 
the former groups, was 
practically the same 
in both parts. Hill 3 
was noticeably very 
low in average total 
dry matter and starch 
content of both root- 
stock and dry matter. 
Table 6 presents some 
very definite evidences 
as to the nature of the 
sugars of the canna 
plant and the changes 
occurring in their trans- 
location from the leaves 
to the rootstock. The 
chief sugar of the leaves 
is sucrose with a small 
The hexose-sucrose ratio 
age of the hill and the 
20 
30 
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SAMPLE MUMBEG 
22 
Fig. 13.— Relation of specific gravity to starch, dry matter, and 
solids other than starch in c^nna rootstocks 
but ever present quantity of the hexoses. 
remains consistently low regardless of the 
stage of maturity of the plant. This is notable in considering the 
data of Davis and Sawyer (5), who found, in case of the potato plant, 
that although sucrose predominates in early growth, the hexoses 
exceed sucrose in later growth when translocation rather than growth 
is the principal function of the leaves; whereas, the results of Lutman 
(9) and Miller (11) show very little correlation between the reducing 
and nonreducing sugars of the leaves. 
