Table 3.

Regression parameters, within the two regions of water contents (absence/presence of freezable water in seed tissues), of the relationship between water content and enthalpy of melting transitions of seed samples of the four Citrus species studied, proportion of variance explained by the regression, R², and probability P of significance of each parameter

	Linear regression at low water contents			Linear regression at high water contents					Heat of fusion of freezable water (J g−1 H2O)
	y value at origin	Slope (J g−1 H2O)	y value at origin	Slope (J g−1 H2O)	R2 (%)
C. aurantifolia	34·4	22·0	11·0	270·6	59	248·5
P	<0·0001	0·7205	0·3055	<0·0001
C. grandis	26·5	32·2	−9·8	282·3	83	250·1
P	0·0001	0·4668	0·3590	<0·0001
C. madurensis	27·9	38·0	3·5	250·1	81	212·1
P	<0·0001	0·3405	0·7748	<0·0001
C. reticulata	33·8	44·6	15·2	246·8	84	202·2
P	<0·0001	0·1512	0·0653	<0·0001