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Table I

t-tests on predawn leaf water potential values.

Day Mean S* (N) Mean M* (N) t p
2 0.49 (10) 0.36 (10) 8.55 < 0.001
5 1.01 (10) 0.55 (10) 3.80 0.001
9 1.34 (10) 0.39 (10) 8.46 < 0.001
12 0.74 (10) 0.42 (10) 2.68 0.015

16 1.55 (10) 1.14 (10) 2.64 0.016
19 0.30 (10) 0.27 (10) 0.46 0.652
23 0.87 (10) 0.57 (10) 3.47 0.003
26 1.20 (10) 0.43 (8) 10.53 < 0.001
30 1.80 (10) 1.17 (10) 5.00 < 0.001

33 0.64 (10) 0.37 (10) 5.02 < 0.001
37 0.68 (10) 0.86 (10) -1.8 0.08
44 0.60 (10) 0.44 (10) 5.5 < 0.001
47 1.91 (8) 0.73 (8) 5.7 < 0.001

51 0.50 (10) 0.39 (10) 1.7 0.105

Mean S/M: mean value of predawn leaf water potential, N S/M: number of replicates, t: Student’s t statistic, p: associated p-value.