Table 1.
P uptake |
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P treatment (μm) | Root mass ratio, day 54 (g g−1) | Leaf/root area ratio, Day 54 (cm2 cm−2) | Relative growth rate, days 8/54 (d−1) | mg g−1 d−1 | mg m−2 d−1 | |
L. albus | ||||||
1 | 0·37a | 0·46b | 0·039b | 0·06c | 0·83c | |
10 | 0·32b | 0·70a | 0·044ab | 0·36c | 4·55c | |
50 | 0·33b | 0·64a | 0·050a | 4·90a | 77·44a | |
150 | 0·32b | 0·60a | 0·047ab | 3·35b | 49·72b | |
Mean | 0·33a | 0·60a | 0·045b | 2·45b | 33·14b | |
L. atlanticus | ||||||
1 | 0·30a | 0·34b | 0·049b | 0·09c | 0·91c | |
10 | 0·29a | 0·51ab | 0·061a | 2·43b | 25·43b | |
50 | 0·28a | 0·51ab | 0·060a | 5·52a | 62·20a | |
150 | 0·27a | 0·66a | 0·057a | 6·13a | 63·54a | |
Mean | 0·28b | 0·52b | 0·057a | 3·54a | 38·02a | |
L. micranthus | ||||||
1 | 0·33a | 0·30b | 0·048a | 0·09b | 0·70b | |
10 | 0·21b | 0·58a | 0·036b | 4·81a | 44·71a | |
50 | ||||||
150 | ||||||
Mean | 0·27 | 0·44 | 0·042 | 2·17 | 22·21 |
Treatments marked with the same lower-case letter are not significantly different within each species using one-way ANOVA followed by Duncan's multiple test (P < 0·05). Treatment means indicated a difference among species using two-way ANOVA followed by Duncan's multiple test (P < 0·05); not relevant for L. micranthus because there were no data for 50 and 150 µm P.