Fig. 1.

Percentage germination (mean ± s.e.) over time of P. strombulifera seeds exposed to different osmotic potentials of Na salts. No germination occurred at −1·9 MPa Na₂SO₄, so these results were not included in the graph. All treatments at −2·2 MPa inhibited all germination. Values with the same letter at 168 h are not significantly different at P > 0·05, Scheffé test.