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KMID : 0903619950360060907
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Journal of the Korean Society for Horticultural Science
1995 Volume.36 No. 6 p.907 ~ p.916
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Effects of Ethionine , Methionine , and AOA on the Vaselife and Polyamines Contenst of Cut Rose ´ Red Sandra ´
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Abstract
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Changes of endogenous polyamines contents, fresh weight, flower diameter, water balance, and longevity were measured to investigate the effects of ethionine, methionine, and amino oxyacetic acid (AOA), and calcium nitrate applied to the preservative solutions on the vaselife of cut rose ´Red Sandra´. Longevity of cut roses maintained in the distilled water control, basal solution (2% sucrose + 200 ppm BHQS; BS), BS + 0.1 mM ethionine, BS + 0.1 mM methionine, BS + 0.1 mM methionine + Ca(NO₃)₂, and BS + 1 mM AOA was 8.8, 10.6, 18.3, 11.1, 13.7, and 10.7 days, respectively. The most surprising features of ethionine were to be very effective in 1) inhibiting petal´s blueing and maintaining petals´ tugor pressure on the basis of a visual observation, and 2) stimulating endogenous putrescine and spermidine during vaselife, subsequently extending a longevity of cut rose extraordinarily. In this case, the levels of polyamines were ranged from 0.001 to 0.02 ㏖/g FW which were very low by an average of 0.001% as compared to that of petal of cut carnation. On the other hand, it was found that Ca (NO₃)₂ was not additive to the beneficial effects of ethionine and AOA, inhibitor of ACC synthase, also had no effect on extending longevity of cut rose while remarkably reduced endogenous putrescine content throughout the vaselife. Finally, correlation between exact wilting time and decreasing pattern of water balance was discussed.
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KEYWORD
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