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KMID : 0613820030130060822
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Journal of Life Science
2003 Volume.13 No. 6 p.822 ~ p.828
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Changes of Enzyme Activities and Inorganic Nutrient Contents Associated with Flower Development in Tulip (Tulipa gesneriana)
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Cho Hyo-Kyung
Park Soon-Ki
Chung Il-Kyung
Lee Jae-Seog
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Abstract
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This study was carried out to investigate the changes of enzymes and micro inorganic nutrients that is associated with flower senescence during flower development in tulip cultivars, ’Apeldoorn’ and ’Golden Apeldoorn’. Ribonuclease, peroxidase and protease activities were gradually increased from the stage of early flowering to later. Polyphenol oxidase showed the highest activity at stage 5, which the flower was in full bloom indicating that it acts at an initial stage of flower senescence. The protease activity was different in the petal extracts during flower development between the cultivars ’Apeldoorn’ (red petal) and ’Golden Apeldoorn’ (yellow petal). This result suggested that protease might relate to pigment biosynthesis in petal of tulip. In contrast to the decrease of inorganic nutrients K, Mn, Zn and P contents during floral development, Ca, Mg and Fe showed the gradual increasement that is similar with ribonuclease, peroxidase and protease. It suggests that they have some interaction during flower senescence.
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KEYWORD
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Peroxidase, Polyphenol oxidase, Protease, Ribonuclease
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