Bulbs of Lycoris radiata ( L' Hér.) Herb. and L. sprengeri Comes ex Baker were soaked by 0 (CK), 60, 120 and 180 mg · L-1 6-BA, GA3 and ethephon before cultivated, and contents of soluble sugar, soluble protein and nucleic acid in bulbs were comparatively analyzed during flower bud differentiation period (from April to July). The results show that contents of soluble sugar, soluble protein and nucleic acid in bulbs of two species in the control all appear the trend of firstly increasing and then decreasing with the highest values on 25th June (carpel differentiation stage) or l0th July (pistil differentiation stage). After treated with 60, 120 and 180 mg · L-1 6-BA, GA3 and ethephon, contents of soluble sugar, soluble protein and nucleic acid in bulbs of two species firstly increase gradually and reach peak values on 25th June then begin decreasing, or increase continuously. With prolonging of time,soluble sugar content in L. radiata bulb increases with different degrees as a whole comparing to the control, while that in L. sprengeri bulb has no regular change, is higher or lower than that of the control,but soluble sugar content in bulbs of two species in all treatment groups all are significantly different with that of the control. And in all treatment groups, soluble protein content in bulbs of two species always maintains a higher level after entered flower primordium formation stage ( 10th May), and nucleic acid content maintains a lower level at the beginning of flower bud differentiation period, then increases rapidly at pistil differentiation stage and reaches the peak and afterwords reduces sharply. Overall,soluble sugar and soluble protein contents in L. radiata bulb are higher and lower, respectively than those in L. sprengeri bulb, and difference of nucleic acid content in bulbs of two species is not obvious.It is indicated that three exogenous plant growth regulators for soaking bulbs can influence the metabolism of L. radiata and L. sprengeri to a certain degree during flower bud differentiation period, and the influences on L. radiata bulb are more obvious than those on L. sprengeri.%在栽植前采用0(CK)、60、120和180 mg·L-16-BA、GA3和乙烯利对石蒜[Lycoris radiata(L'Hér.)Herb.]和换锦花(L.sprengeri Comes ex Baker)鳞茎进行浸球处理,对花芽分化期内(4月至7月)石蒜和换锦花鳞茎中可溶性糖、可溶性蛋白质和核酸含量的变化进行了比较分析.结果表明:在花芽分化期内,随时间的推移,对照组石蒜和换锦花鳞茎中可溶性糖、可溶性蛋白质和核酸含量呈先增加后降低的趋势,并在6月25日(心皮分化期)或7月10日(雌蕊分化期)达到最高值.经60、120和180 mg·L-16-BA、GA3和乙烯利浸球处理后,石蒜和换锦花鳞茎中可溶性糖、可溶性蛋白质和核酸含量在花芽分化期内先逐渐增加,至6月25日或达到峰值后开始下降或继续升高;但与对照相比,随时间的推移,石蒜鳞茎中可溶性糖含量总体上有不同程度的增加,而换锦花鳞茎中可溶性糖含量或高或低无规律性的变化,但各处理组石蒜和换锦花鳞茎中可溶性糖含量均与对照间有差异;可溶性蛋白质含量在进入花原基形成期(5月10日)后始终维持在较高的水平;核酸含量在花芽分化期的前期维持在较低的水平,在雌蕊分化期迅速增加并达到峰值,之后又急剧下降.总体上看,石蒜鳞茎中可溶性糖含量高于换锦花,可溶性蛋白质含量低于换锦花,而二者间核酸含量差异不明显.研究结果表明:3种外源植物生长调节剂浸球处理可在一定程度上对花芽分化期内石蒜和换锦花鳞茎的新陈代谢产生影响,且对石蒜的影响强于换锦花.
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