Effect of Vernalizing Conditions on the Concentrations of Endogenous Gibberellins in Wheat Seedlings
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概要
- 論文の詳細を見る
In Chinese spring wheat (Triticum aestivum), GA_1, GA_3, GA_8, GA_9, GA_<17>, GA_<19>, GA_<20>, GA_<29>, GA_<44>, and GA_<53> were identified in the mature leaves, GA_1, GA_3, GA_8, GA_<19>, GA_<20>, GA_<29>, GA_<44>, and GA_<53> in the sheath segments, and GA_1, GA_3, GA_<19>, GA_<20>, GA_<44>, and GA_<53> in the roots of seedlings, based on C_<18> HPLC, GC-SIM and KRI data. Seven of these GAs were quantified by capillary GC-SIM, using deuterated GA_1, GA_3, GA_8, GA_9, GA_<19>, GA_<20>, and GA_<53> as internal standards. The concentrations of these GAs tended to be highest in the sheath segments and lowest in the roots. In general, higher concentrations of GA_<53>, GA_<19>, and GA_3 were present in mature leaves, sheath segments, and roots of seedlings grown under vernalizing conditions (low temperature, short photoperiod, and low light intensity), while the concentrations of GA_<20>, GA_1, GA_8, and GA_9 were higher in seedlings grown under non-vernalizing conditions (higher temperature, longer photoperiod, and higher light intensity). The relative concentrations of GA_<53>, GA_<19>, GA_<20>, GA_1, and GA_8 from the two growing conditions lead us to infer that the conversion of GA_<19> to GA_<20> (C_<20>-GA to C_<19>-GA) would be a rate-limiting step for the biosynthesis of GA_1, this GA being apparently responsible for shoot elongation in wheat. This rate-limiting step may be associated with a short photoperiod and/or low light intensity.
- 社団法人日本農芸化学会の論文
- 1993-05-23
著者
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Murofushi Noboru
Department Of Agricultural Chemistry The University Of Tokyo
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LIN Jiann-Tsyh
Western Regional Research Center, U.S. Department of Agriculture
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Lin J‐t
Western Regional Research Center U.s. Department Of Agriculture
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Lin Jiann-tsyh
Western Regional Research Center U.s. Department Of Agriculture
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Stafford E
Western Regional Research Center, U.S. Department of Agriculture
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Stafford E
Western Regional Research Center U.s. Department Of Agriculture
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