3.2. Effect of GA3 treatment on post harvest physiological changes
3.2.1. Total carbohydrate content
Significant differences (0.01) were obtained for soluble sugar content among with the highest mgl-1 treatment after 1, 5, 10 days, being 100, 150 and 200 carbohydrate content in leaves (Table 2). Treatment of BA 100 mg/l increase content carbohydrate of petal relative to control (Table 2). The authors suggested that BA 1997 BA by reduce rate respiration increased total soluble carbohydrate content in the cut flower [Wang, Y.T, 1996] that carbohydrate may have contributed to the energy pool and / or increased the osmotic potential flower [Andrew, Macnish, 2010].
We found increase carbohydrate in the leaf Cause increase longevity in the cut flower.
BA
Concentration
mgl-1
|
Protein
content of
leave (mg/gr)
|
Protein
content of
petal (mg/gr)
|
Carbohydrate
content of
leave (mg/gr)
|
Carbohydrate
content of
petal (mg/gr)
|
Chlorophyll
content of
leaves (mg/gr)
|
0 (control)
|
2.9
|
5.5
|
184
|
147
|
1.88
|
100
|
3.8
|
5.7
|
251**
|
160**
|
3.4*3
|
150
|
4.8**
|
5.5
|
251**
|
151
|
3.13*
|
200
|
3.3**
|
7**
|
262.8**
|
152
|
4.9**
|
**: Significant differences (0.01) relative to control
*: Significant differences (0.05) relative to control
2 day after harvest dose carbohydrate was highest in the leaf but 10 day after harvest content carbohydrate was highest in the petal (Fig 1). This could be cause translocation the carbohydrate towards the flower. This results agree with Pulin’s report [1997] and the presence of high concentration of reducing sugars in the petals of the floret button would suggest that sucrose hydrolysis occur in these organs. The total carbohydrate content in the petals and leaves varied thought the evaluation period, decreasing after 2 days, possibly because of on increase in the respiration rate [I. Figueroa and M. Colinas, 2005], in addition after 5 days all concentration BA had high CH content because of the lower in the respiration rate, at day 10 carbohydrate began to decrease exhausting the substrate. These results agree with Figueroa and Colinas [2005] (fig: a, b, c, d) s.
Fig l: Effects of BA on change soluble carbohydrate of the uppermost petal and leaf in gladiolus (a, b, c, d)
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