Results (
Thai) 2:
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5.7. Statistical analysis
Statistical evaluations were performed using the software Statgraphics
Centurion XVI version 15.0.10 (Statpoint Technologies
Inc., Warrenton, VA, USA). Significance of differences was conducted
with LSD of Fisher test. Differences were considered significant
at a probability level of P 6 0.05. The effect of UV-B, leaf
ontogeny and their interaction were determinate by multifactorial
ANOVA. Results are reported as a mean of three independent replicated
assays, and each experiment was repeated three times.
Principal component analysis (PCA) was applied to the data set,
and performed with the InfoStat software (InfoStat version 2008.
Grupo InfoStat, Argentina). The results of this analysis are then presented
as a two-dimensional graphical display of the data (Biplots).
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