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Table 1 Parameters of the hydrotime model for seed germination of seven Agave species under three substrate water potentials (-0.03, -1.0 and -1.5 MPa)

From: Seed germination of Agave species as influenced by substrate water potential

Species θH(MPa h) Ψb(50)(MPa) σΨb(MPa) r2
A. americana var. marginata 142 -2.01 0.44 0.823
A. asperrima 158 -1.58 0.37 0.881
A. cupreata 190 -1.82 0.46 0.814
A. duranguensis 137 -1.68 0.58 0.775
A. lechuguilla 153 -1.84 0.36 0.892
A. salmiana 282 -2.64 0.81 0.768
A. striata 176 -2.02 0.41 0.829
  1. θH: hydrotime constant; Ψb(50): base water potential; σΨb: standard deviation of Ψb(50); r2: determination coefficient.