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      • KCI등재

        Changes of Endogenous Gibberellins in Tubers of Chinese Yam (Dioscorea opposita) during Storage Period

        김상국,이상철,정형진,Bong-HoLee,In-JungLee 한국작물학회 2003 Korean journal of crop science Vol.48 No.4

        For storage periods of tubers in Chinese yam, the levels of GA/sub 44/ and GA/sub 20/ was constant, meanwhile both GA/sub 53/ and GA/sub l9/ level were always higher than that of GA/sub 44/ and GA/sub 20/ㆍ GA/sub 9/ content as precursor of GA₄ was not changed during storage. GA/sub 24/ content was low to below 0.2 ng for 90 days after storage, GA/sub 36/ content as precursor of GA₄ like GA/sub 9/ was about 6-8 fold higher than that of GA/sub 9/ during storage. GA contents of the two gibberellin biosynthetic pathways were gradually increased when storage periods were progressed. Bioactive GA₁ content as the GA members of an early C-13 hydroxylation was always constant, and its content was very low as below 0.1ng per dry weight, meanwhile, bioactive GA₄ content as the GA members of non C-13 hydroxylation was drastically increased, also, its content was highest at 90 days after storage, and then decreased at 120 days after storage. Consequently, we suggest that GA₄ may be involved in controlling tuber sprouting in Chinese yam.

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