The statistical software (R, version 2.13.0, dotsrc.org, Alborg,
Denmark) was used to evaluate the variation of parameters among
cultivars and between the temperature treatments. Combined and
individual analysis of variance (ANOVA) was done considering the
factors cultivar, growth temperature treatment and days of heat
treatment. The stress and recovery values were compared with the
control values at each stage and temperature treatment to obtain
the level of significance.