Table I.
Sulfur in mature lupin seeds
| Plant Sulfur Nutrition | Lupin Genotype | Sulfur in Mature Seed
|
||
|---|---|---|---|---|
| Reduced | Oxidized | Total | ||
| μmol sulfur g−1 dry wt | ||||
| High sulfur nutrient | C | 73.4 ± 1.9 | 52.2 ± 2.4 | 123.4 ± 5.2 |
| Tg | 87.8 ± 1.6 | 28.4 ± 0.6 | 111.6 ± 5.8 | |
| Tg − C | 14.4 | −23.8 | −11.9 | |
| Medium sulfur nutrient | C | 58.8 ± 2.4 | 12.8 ± 0.2 | 68.8 ± 2.1 |
| Tg | 71.6 ± 1.1 | 1.3 ± 1.1 | 68.8 ± 2.3 | |
| Tg − C | 12.8 | −11.6 | 0 | |
| Low sulfur nutrient | C | 26.3 ± 1.2 | 0 | 25.0 ± 0.9 |
| Tg | 27.8 ± 1.9 | 0 | 25.9 ± 1.8 | |
| Tg − C | 1.6 | 0 | 0.9 | |
| Soil with sulfur supplement | C | 70.6 ± 1.4 | 48.8 ± 0.8 | 116.3 ± 1.3 |
| Tg | 89.7 ± 0.8 | 22.5 ± 4.2 | 108.4 ± 4.4 | |
| Tg − C | 19.1 | −26.3 | −7.8 | |
| Field | C | 73.4 ± 2.4 | 26.6 ± 3.8 | 98.8 ± 5.4 |
| Tg | 85.6 ± 2.7 | 12.8 ± 3.1 | 97.5 ± 5.5 | |
| Tg − C | 12.2 | −13.8 | −1.3 | |
Values shown are the mean ± sd of the means of duplicate determinations on flour from pools of 6 g of mature seed from each of either two or three plants for each group grown in soil or sand/perlite in the greenhouse. For plants grown in the field, figures are the mean of the means of duplicate determinations on flour from pooled samples of approximately 40 seeds, n = 4. Total sulfur was determined separately; therefore, the total sulfur figures are not necessarily the perfect sum of the other two figures. C, Control; Tg–C, difference between Tg and control.