Statistical analysis
The cavitation resistance of petioles, leaves, petals, and peduncles
(all organs were measured on each individual) was compared using two-way
ANOVA to test the effect of organ type and individual on P50values in R. A log transformation was applied to fulfil assumptions of
homoscedasticity and normality. Post hoc tests were computed using
Tukey’s HSD.
The effect of disabling phloem water delivery by heat girdling on fruit
expansion was tested using a two-way repeat measures ANOVA. The
interaction term was determined to be non-significant and was removed
from the model. Assumptions were tested for normality and no
transformations were applied. A qq plot could not be fitted given the
small data set, however, the consistency of results indicated that model
assumptions could be met.
The cavitation resistance (quantified as the P50 and P88 )
and mean diameter of the largest 5 % of vessels in peduncles and stems
(measured on separate individuals) was compared using a student’s
T-test.
Results: