for Vota
and 0.0039
for
in mature banana leaves.
data
2
239,240),
2
Unpublished
Seaevola and Messerscimidia leaves.
239,
for banana fruit and soil samples
from the same area collected
240
.
\
Pu were assigned to mature
Squash ~ One sample of summer
squash and its seeds was available
in the
1972 Bikini survey yield concentration
from the 1975 survey.
factors of < 0.058 for 906, and
first
<Q.00028 for 239,240, 17
centrations in garden vegetables from
Because no
This is the
time measured radionuclide con-
data are currently available for con-
Bikini Atoll have been available.
centration factors
Squash uptake of 206). and 376. is
for
‘es in bana-
nas, we have assigned the conservative
greater than that of any other plant
value of
sampled.
the
los concentration
fac-
Other workers also have
;
;
137.
tor in mature banana leaves to banana
observed high concentrations of
{ruit.
in garden vegetables as compared
Cs
to
concentrations in other edible and
Messersehmnidia and Scaevola — As
discussed
in the Enewetak survey, | the
indicator plants.
data from
these two indicator plants
that
-
Lynch e@€¢ al.! notes
,
in field studies,
137
the
Cs con~
show a significant correlation between
centration in lettuce leaves is an
Leaves and soil on both an individual
order of magnitude greater than the
and a pooled basis.
concentrations measured
The number of
in other edi-
samples from the Bikini survey does
ble portions of food plants.
not warrant
individual statistical
ratory experiments to determine the
analysis of
these species.
uptake of
However,
ls by squash,
the pooled data show a correlation
et ab.
between leaves and soil
that
squash that are higher
ficant at
for 906
the O.t
level
is signi-
report
In labo-
Walker
"Cs concentrations in
than
those
measured in Messerschmnidta, Seaevola,
and Pandanus grown in the same Ronge-
(Fig. 8) but is not significant for
137
Cs (Fig. 9).
Cesium-137 dees show
lap Atoll soil.78
However,
from
a significant correlation between
Walker's experiments it appears that
leaves and soil
with the application of fertilizer,
in
the Enewetak
results and probably would do so for
the concentrations in squash can be
Bikini if the number of samples were
reduced
larger.
Based on
lated concentration factors and on
results of
found
the median calcuthe
the regression analysis,
3.7
for 137 og,
Concentration Ratios
From the
and 0.035 for
those
in other edible plants.
Radionuclides
concentration factors of 0.49 for
90.
to levels comparable to
soil
that are
taken up
through roots are either
retained in the roots or transported
~28-