Table 1.
Growth and physiological properties of S. virginicus genotypes collected from different places. ND, not determined.
| Origin | Tolerable NaCl concentration (mM) | Growth stimulation with NaCl treatment | Na+, Cl− and K+ accumulation under high saline condition | K+/Na+ ratio under seawater | Proline accumulation in shoots (μmol g DW−1) |
|---|---|---|---|---|---|
| Okinawa, Japan (This study) | 1500 | Whole plant: 100 mM | Yes | 1.0 | 32.2 and 101.5 at 500 and 1000 mM NaCl, respectively |
| Roots: up to 1000 mM | |||||
| Georgia, USA (Gallagher 1979) | 1380 (8 %) | Not observed | Yes | 0.85 | ND |
| Florida, USA (Blits and Gallagher 1991) | ND | Roots: seawater | Yes, but Cl− concentration was ND | 1.09–1.39 | ND |
| Hawaii, USA (Marcum and Murdoch 1992) | ND | Shoots: 150 mM | Yes | 0.4 | 22.9 at 450 mM NaCl |
| Roots: up to 450 mM | |||||
| Hawaii, USA (Bell and O'Leary 2003) | ND | Above- and below-ground biomass: 100–150 mM | Yes, but Cl− concentration was ND | 0.3 | ND |
| Durban, South Africa (Naidoo and Mundree 1993; G. Naidoo and Y. Naidoo 1998; Y. Naidoo and G. Naidoo 1998) | ND | Not observed | Yes | ND (2.0 under 80 % seawater) | 6.49 at 400 mM NaCl |
| Egypt (Ashour et al. 1997) | ND | Aboveground biomass: up to 125 mM | ND | ND | ND |