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. Author manuscript; available in PMC: 2009 Aug 17.
Published in final edited form as: Mol Ecol. 2008 Mar;17(6):1614–1626. doi: 10.1111/j.1365-294X.2008.03690.x

Table 5.

Result of nonlinear regression (sas proc nlin using the Marquardt estimation method) of root : total mass ratio by thermal treatment, using the regression formula root : total ratio = κ + eα(Hsp content). Data from experiment 1. κ was fixed at the treatment minima for root : total mass ratio: 0.039 and 0.026 for the control and 35 °C treatments, respectively. SSq = sum of squares, SE = standard error, d.f. = degrees of freedom

Temperature treatment α (SE) Total SSq (d.f. = 6) Model SSq (d.f. = 1) Error SSq (d.f. = 5) F P > F
Control −15.5 (1.6) 0.047 0.041 0.006 77.93 0.001
35°C −12.5 (2.0) 0.031 0.024 0.008 15.49 0.01