Section 9
Chapter 8,583

Effects of sucrose, BA, or aluminum sulfate in the preservative solutions on photosynthesis, respiration, and transpiration of cut rose leaf

Son, K.C.; Gu, E.G.; Byoun, H.J.; Lim, J.H.

Journal of the Korean Society for Horticultural Science 35(5): 480-486


Accession: 008582356

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The rates of photosynthesis, respiration, and transpiration of the leaf of cut rose 'Sonia' held in the vasal solution changed at the time of anthesis and their responses varied, depending upon chemicals applied to the vasal solutions. In the leaf of cut rose maintained in the distilled water alone as control, chlorophyll content steadily increased during the entire experiment period. In addition, the photosynthetic rate remained higher than that of treatments of either 2% sucrose plus 200 ppm 8-hydroxyquinoline sulfate (basal solution; BS) or benzyladenine (BA) plus BS as vasal solutions. In contrast to the information known previously, it was found that BS solution containing sucrose reduced the photosynthetic rate and inhibited chlorophyll production in the leaf, but accelerated respiration as compared to the control. However, it is interesting to note the fact that addition of BA to BS reduced the rate of photosynthesis, but increased chlorophyll content and continued to keep respiration rate constantly high until the termination of vase life. In this case, BA treatment was very effective in retarding the senescence of both leaf and flower, and increasing fresh weight as compared to the other treatments, despite the accelerating transpiration rate during the dark period at the time of anthesis of cut rose. On the other hand, it was shown that aluminum sulfate (Al-2(SO-4)-3) added to BS as vasal solution accelerated the transpiration rate but reduced the rates of photosynthesis and respiration, and chlorophyll content of leaf, resulting in the damage of both flower and leaf.

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