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char = D;code = 68
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char = l;code = 108
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char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
result sql = Uptake of weathered DDT in vascular plants: potential for phytoremediation.
Uptake of weathered DDT in vascular plants: potential for phytoremediation.
char = S;code = 83
char = i;code = 105
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char = D;code = 68
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char = 1;code = 49
char = ,;code = 44
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char = e;code = 101
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char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
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char = c;code = 99
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char = m;code = 109
char = u;code = 117
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char = e;code = 101
char = d;code = 100
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char = e;code = 101
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char = e;code = 101
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char = o;code = 111
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char = m;code = 109
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char = o;code = 111
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char = f;code = 102
char = e;code = 101
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char = D;code = 68
char = T;code = 84
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char = o;code = 111
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char = a;code = 97
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char = c;code = 99
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char = f;code = 102
char = f;code = 102
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char = c;code = 99
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char = t;code = 116
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char = t;code = 116
char = o;code = 111
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char = m;code = 109
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char = e;code = 101
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char = e;code = 101
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char = h;code = 104
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char = c;code = 99
char = u;code = 117
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char = s;code = 115
char = .;code = 46
char = ;code = 32
char = P;code = 80
char = h;code = 104
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = i;code = 105
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char = g;code = 103
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char = t;code = 116
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char = ;code = 32
char = r;code = 114
char = y;code = 121
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = u;code = 117
char = m;code = 109
char = p;code = 112
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = );code = 41
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = .;code = 46
char = ;code = 32
char = P;code = 80
char = l;code = 108
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = i;code = 105
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = D;code = 68
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = E;code = 69
char = ;code = 32
char = (;code = 40
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ,;code = 44
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = D;code = 68
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = D;code = 68
char = D;code = 68
char = E;code = 69
char = );code = 41
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = 3;code = 51
char = 7;code = 55
char = 0;code = 48
char = 0;code = 48
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = /;code = 47
char = g;code = 103
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = /;code = 47
char = g;code = 103
char = );code = 41
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = y;code = 121
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = P;code = 80
char = a;code = 97
char = r;code = 114
char = a;code = 97
char = f;code = 102
char = i;code = 105
char = l;code = 108
char = m;code = 109
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = v;code = 118
char = o;code = 111
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = u;code = 117
char = c;code = 99
char = u;code = 117
char = r;code = 114
char = b;code = 98
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = p;code = 112
char = o;code = 111
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = u;code = 117
char = m;code = 109
char = p;code = 112
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = z;code = 122
char = u;code = 117
char = c;code = 99
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = );code = 41
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = u;code = 117
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = o;code = 111
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = i;code = 105
char = l;code = 108
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = i;code = 105
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ,;code = 44
char = ;code = 32
char = p;code = 112
char = u;code = 117
char = m;code = 109
char = p;code = 112
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = u;code = 117
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = 1;code = 49
char = 9;code = 57
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = o;code = 111
char = o;code = 111
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 5;code = 53
char = 7;code = 55
char = ,;code = 44
char = 5;code = 53
char = 3;code = 51
char = 6;code = 54
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = o;code = 111
char = t;code = 116
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = z;code = 122
char = u;code = 117
char = c;code = 99
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = u;code = 117
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = 2;code = 50
char = 0;code = 48
char = 4;code = 52
char = 3;code = 51
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = o;code = 111
char = o;code = 111
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 3;code = 51
char = 5;code = 53
char = ,;code = 44
char = 2;code = 50
char = 7;code = 55
char = 7;code = 55
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = D;code = 68
char = D;code = 68
char = T;code = 84
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = o;code = 111
char = t;code = 116
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = W;code = 87
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = c;code = 99
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = f;code = 102
char = a;code = 97
char = l;code = 108
char = f;code = 102
char = a;code = 97
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = u;code = 117
char = m;code = 109
char = p;code = 112
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = i;code = 105
char = p;code = 112
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
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char = t;code = 116
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result sql = Since the discovery of its insecticidal properties and its subsequent widespread use, DDT [2,2-bis(chlorophenyl)-1,1,1-trichloroethane] has accumulated in the environment, having a wide range of adverse effects on nontarget species. Due to their hydrophobicity, DDT and other persistent organic pollutants are difficult to remove from contaminated soils, and increasingly so through time as weathering occurs. Phytoremediation is an emerging plant-based technology that may be used to cost-effectively remove or neutralize contaminants in the environment. For some phytoremediation strategies, it must first be possible to translocate hydrophobic chemicals across the root and through the shoot via an aqueous transpiration stream. The objective of this study was to compare the ability of five plant varieties (zucchini, tall fescue, alfalfa, rye grass, and pumpkin) to mobilize and translocate DDT. Plants were grown in the greenhouse in soil contaminated with DDT and its metabolites, DDD and DDE (sigmaDDT refers to all of DDT, DDD, and DDE) at two concentrations (high approximately 3700 ng/g, and low approximately 150 ng/g). All trays were covered with laboratory Parafilm to limit volatilization. Cucurbita pepo species (pumpkin and zucchini) achieved the highest translocation and bioaccumulation factors, and also extracted the highest absolute amounts of sigmaDDT from both the high and low sigmaDDT soils. In the high sigmaDDT soil treatment, pumpkin accumulated 1519 ng of sigmaDDT in the roots and 57,536 ng of sigmaDDT in the shoots, and zucchini accumulated 2043 ng of sigmaDDT in the roots and 35,277 ng of sigmaDDT in the shoots. With the exception of alfalfa and pumpkin, principal component analysis detected no preferential translocation or transformation of sigmaDDT compounds within the plant. The success of the Cucurbita pepo species in this study to extract and translocate such hydrophobic molecules may be related to their high transpiration volume, large above-ground biomass, and composition of root exudates. This suggests potential for their application in phytoremediation.

Publication: Environ. Sci. Technol. 2004 Nov 15 ;38(22)::6147-54.
Publication Date: 2004 Nov 15
Study Author(s): Lunney, Alissa I;Zeeb, Barbara A;Reimer, Kenneth J;
Institution: Environmental Sciences Group, Royal Military College of Canada, Station Forces, Kingston, Ontario K7K 7B4, Canada.
Shortcut link to this study:
Since the discovery of its insecticidal properties and its subsequent widespread use, DDT [2,2-bis(chlorophenyl)-1,1,1-trichloroethane] has accumulated in the environment, having a wide range of adverse effects on nontarget species. Due to their hydrophobicity, DDT and other persistent organic pollutants are difficult to remove from contaminated soils, and increasingly so through time as weathering occurs. Phytoremediation is an emerging plant-based technology that may be used to cost-effectively remove or neutralize contaminants in the environment. For some phytoremediation strategies, it must first be possible to translocate hydrophobic chemicals across the root and through the shoot via an aqueous transpiration stream. The objective of this study was to compare the ability of five plant varieties (zucchini, tall fescue, alfalfa, rye grass, and pumpkin) to mobilize and translocate DDT. Plants were grown in the greenhouse in soil contaminated with DDT and its metabolites, DDD and DDE (sigmaDDT refers to all of DDT, DDD, and DDE) at two concentrations (high approximately 3700 ng/g, and low approximately 150 ng/g). All trays were covered with laboratory Parafilm to limit volatilization. Cucurbita pepo species (pumpkin and zucchini) achieved the highest translocation and bioaccumulation factors, and also extracted the highest absolute amounts of sigmaDDT from both the high and low sigmaDDT soils. In the high sigmaDDT soil treatment, pumpkin accumulated 1519 ng of sigmaDDT in the roots and 57,536 ng of sigmaDDT in the shoots, and zucchini accumulated 2043 ng of sigmaDDT in the roots and 35,277 ng of sigmaDDT in the shoots. With the exception of alfalfa and pumpkin, principal component analysis detected no preferential translocation or transformation of sigmaDDT compounds within the plant. The success of the Cucurbita pepo species in this study to extract and translocate such hydrophobic molecules may be related to their high transpiration volume, large above-ground biomass, and composition of root exudates. This suggests potential for their application in phytoremediation.
PMID: 15573619

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