DISCUSSION
Foliar applications significantly increased the vase life of treated leaves. Similarly, Ponce et al. (2009) found that glycerol or sorbitol (1%) extended the shelf-life of fresh apples in 10 days. De-Stigter (1981) treated the cut flowers with the commercial preservatives (8-HQC + 2% Suc) to diminish transpirational loss and maintain flower turgidity and therefore extended their vase life (Łukaszewska and Skutnik, 2003). However, same treatments decreased the rate of leaf water loss, these findings in agreement with Jones et al. (2004) who found that, anti-transpiration treatments did not decrease solution uptake by the holly stems, leading improve marketability of branches. Using anti-transpirants improved the water use efficiency and reduced leaf transpiration rate by 87 to 93% (Nasraoui, 1993; Bora and Mathur, 1998; Makus, 1997). Francisco and Rubio (2009) found that the Anti-transpirant (Pinolene) significantly reduced water uptake but no effect was found with control solution. Moreover, Shen et al. (1999) and Yancey et al. (2005) found that, glycerol can function either as an osmolyte, contributing to the maintenance of water balance, or as an osmoprotectant, allowing the operation of many cellular processes during osmotic stress. Thus, this result supports the present findings, concerning the effect of the glycerol on decreasing the water loss which could enhance the vase life. In addition, it was noticed a parallel increase in the rate of the water loss with increasing both MgCO3 and glycerol over 6%, which were inversely related to vase life. Dubois and Joyce (1992) found the same result in ornamental plants. Generally, it could be concluded that glycerin can be used as a tool for reducing plant water loss, which could be resulted from closing stomata openings and reducing the transpiration rate; as mentioned by previous investigators and leading to increased leaf vase life.
สนทนาFoliar applications significantly increased the vase life of treated leaves. Similarly, Ponce et al. (2009) found that glycerol or sorbitol (1%) extended the shelf-life of fresh apples in 10 days. De-Stigter (1981) treated the cut flowers with the commercial preservatives (8-HQC + 2% Suc) to diminish transpirational loss and maintain flower turgidity and therefore extended their vase life (Łukaszewska and Skutnik, 2003). However, same treatments decreased the rate of leaf water loss, these findings in agreement with Jones et al. (2004) who found that, anti-transpiration treatments did not decrease solution uptake by the holly stems, leading improve marketability of branches. Using anti-transpirants improved the water use efficiency and reduced leaf transpiration rate by 87 to 93% (Nasraoui, 1993; Bora and Mathur, 1998; Makus, 1997). Francisco and Rubio (2009) found that the Anti-transpirant (Pinolene) significantly reduced water uptake but no effect was found with control solution. Moreover, Shen et al. (1999) and Yancey et al. (2005) found that, glycerol can function either as an osmolyte, contributing to the maintenance of water balance, or as an osmoprotectant, allowing the operation of many cellular processes during osmotic stress. Thus, this result supports the present findings, concerning the effect of the glycerol on decreasing the water loss which could enhance the vase life. In addition, it was noticed a parallel increase in the rate of the water loss with increasing both MgCO3 and glycerol over 6%, which were inversely related to vase life. Dubois and Joyce (1992) found the same result in ornamental plants. Generally, it could be concluded that glycerin can be used as a tool for reducing plant water loss, which could be resulted from closing stomata openings and reducing the transpiration rate; as mentioned by previous investigators and leading to increased leaf vase life.
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