Statistical Analysis
Data were then analyzed on SAS by performing a one-way analysis of
variance (ANOVA) with rootstock as the main factor for shoot length,
trunk cross sectional area, net carbon assimilation, stomatal
conductance, transpiration rate and midday stem water potential. Before
the data analysis, interaction among years and rootstocks were evaluated
using SAS 9.4 PROC GLM software (SAS Campus Drive Cary, NC, USA). Mean
separation tests were performed with Tukey’s test with 95% confidence
of significance. Linear regression was used to explore the relationships
between variables and figures were prepared using OriginPro 2021 Data
Analysis and Graphing Software (OriginLab Corporation, MA, USA).