Figure 1. A) DNA concentration (ng/ul) means and their 95% confidence intervals for each tissue-treatment. B) Quality ratios, A260/280 (squares-lines) and A260/230 (circles-dots), for each tissue-treatment. Tissue-treatments are set as follows: 1) Leaf-Silica Gel (n = 48), 2) Root-Silica Gel (n = 48), 3) Root-Distillated Water (n = 48), 4) Root-EtOH70% (n = 48) and 5) Root-EtOH90% (n = 48).