Species | Regression equations^{z} | Drought tolerance^{y} (MPa) |
---|---|---|

Desert willow | Y = 198 X^{-0.73} a | -7.7 ± 1.8 |

Fruitless bulberry | Y = 131 X^{-0.68} b | -4.8 ± 1.9 |

Yellow bells | Y = 188 X^{-0.74}a | -6.9 ± 1.8 |

↵z Y = sin

^{-1}(% cell survival/100)^{1/2}, X = - atmospheric water potential. Regression equations followed by the same letter are not significantly different at p=.05 as determined by multiple linear regression with indicator variables for species and irrigation level.↵y Predicted drought tolerance ± 95% confidence interaval.