| 摘要: |
| 具有顺序性繁殖输出特征的两型花植物内源激素水平与发育期的关系目前了解不多。本文以典型两型花植物孩儿参为材料，采用高效液相色谱法检测了该种6个发育阶段块根中4种内源激素水平并计算了相互间的比值。结果显示，GA3含量在不同发育阶段呈上升趋势，并在闭锁花果实成熟期达到高峰，但在块根成熟期又恢复到较低水平；ABA呈现两个峰值，峰值1出现在开放花盛期，峰值2在闭锁花盛期；IAA在发育的中前期呈现稍微降低的趋势，但在闭锁花种子成熟期达到高峰；ZT在发育的中前期较稳定，但在闭锁花盛期达到高峰，随后开始下降。四组内源激素的比值(GA3/IAA，ABA/ZT，ABA/IAA，IAA/ZT)显示，其与开放花和闭锁花的开花频率、开花时间以及块根的形成有紧密关系，影响了该种的顺序性的繁殖输出模式。 |
| 关键词: 孩儿参 内源激素 开放花 闭锁花 顺序性繁殖输出 |
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| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Variation of endogenous hormone levels of different development stages in a plant with dimorphic flower-Pseudostellaria heterophylla |
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HuWenzhao,ZhangShuo,Zhangyanwen
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| Abstract: |
| Little is known about the relationship between endogenous hormone levels and development stage in two types of flower plants with sequential reproduction output characteristics. In this paper,Pseudostellaria heterophylla, a typical two-type flower plant, was selected as the material the levels of 4 endogenous hormones in root tubers at 6 developmental stages were measured by high performance liquid chromatography (HPLC) and their ratios were calculated. The results showed that GA3 content increased at different developmental stages, and reached its peak at the maturing stage of cleistogamous flowers, but returned to a lower level at the maturing stage of roots. There were two peak values of ABA, the peak value 1 appeared at the peak of chasmogamous flower and the peak value 2 at the peak of cleistogamous flower. IAA decreased slightly in the middle and early stages of development, but reached its peak in the mature stage of cleistogamous flower seeds. ZT is stable in the middle and early stages of development, but peaks in the flowering stage of cleistogamous flowers and then begins to decline. The ratios of endogenous hormones (GA3/IAA, ABA/ZT, ABA/IAA, IAA/ZT) of the four groups showed that they were closely related to the flowering frequency and flowering time of chasmogamous and cleistogamous flowers and the formation of tuber roots, which affected the sequential reproductive output pattern of this species. |
| Key words: Pseudostellaria heterophylla Endogenous hormone Chasmogamous flower Cleistogamous flower Sequential reproductive output |
