Conclusion
It could be concluded that, glycerol at concentration is either 2 or 4% exceeded the vase life leaf about 7-folds, and this was accompanied by lowering the reduction rate
leaf water loss and leaf weight as compared to other treatments. In addition, the effect of glycerol at the mentioned concentrations could decrease the degradation of pigments and proteins and increase the percentage of defense enzymes (SOD and CAT) and this correlated with its ability to decrease leaf water loss.