Table 2.
Cell–cell exchange coefficients for calcein in filaments of Anabaena sp. PCC7120
Measurement | Mean exchange coefficient (s−1) (±s.d.) |
---|---|
1. Wild-type vegetative cells in nitrate-grown filaments | 0.021±0.011 |
2. Wild-type vegetative cells after 16 h of nitrate deprivation | 0.057±0.039 |
3. Wild-type vegetative cells after 96 h of nitrate deprivation | 0.28±0.12 |
4. Wild-type (vegetative cells to heterocysts) after 96 h of nitrate deprivation | 0.035±0.012 |
5. ΔfraG vegetative cells in nitrate-grown filaments | 0.007±0.008 |
6. ΔfraG vegetative cells after 16 h of nitrate deprivation | 0.002±0.002 |
t-Tests indicate that E is significantly different in (1) and (2) (P=0.008); (2) and (3) (P=0.00002); (3) and (4) (P=0.0015); (1) and (5) (P=0.004); (2) and (6) (P=0.004); (4) and (5) (P=0.00008). |