| 紫梗籽银桂种子发育过程中内源激素含量的动态变化研究 |
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| 引用本文： | 朱永莉,沈永宝.紫梗籽银桂种子发育过程中内源激素含量的动态变化研究[J].林业科学研究,2023,36(6):144-150. |
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| 作者姓名： | 朱永莉 沈永宝 |
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| 作者单位： | 1.上海商学院艺术设计学院， 上海 201400;2.南京林业大学风景园林学院，江苏 南京 210037;3.南京林业大学林学院，江苏 南京 210037;4.国家林业局南方林木种子检验中心，江苏 南京 210037;5.南京林业大学南方现代林业协同创新中心，江苏 南京 210037 |
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| 摘 要： | 目的 通过分别测定紫梗籽银桂种子发育过程中胚和胚乳的4种内源激素含量的变化，探讨该过程中内源激素的变化规律。 方法 以紫梗籽银桂种子为研究材料，分别测定其种子发育过程不同时期胚和胚乳内源激素生长素（IAA）、赤霉素（GA3）、玉米素核苷（ZR）、脱落酸（ABA）含量的变化。 结果 紫梗籽银桂种子发育过程中胚的GA3含量整体呈下降趋势，ABA含量呈不断上升的趋势，IAA、ZR含量均呈先上升后下降再上升的趋势；GA3/ABA比值不断下降，IAA/ABA、ZR/ABA的比值先下降后上升，胚中GA3/ABA比值的变化幅度大于IAA/ABA、ZR/ABA的比值变化；胚乳中GA3、IAA、ZR含量总体呈下降的趋势，ABA含量呈先下降、后上升并保持平稳的趋势；GA3/ABA、IAA/ABA、ZR/ABA3个比值总体均呈现下降趋势，胚乳中GA3/ABA比值的变化幅度大于IAA/ABA、ZR/ABA的比值变化。 结论 紫梗籽银桂种子发育过程中胚和胚乳的4种内源激素含量的动态变化呈现一定的规律性，胚及胚乳中GA3/ABA比值均呈下降趋势，变化幅度均大于IAA/ABA、ZR/ABA的比值变化，GA3/ABA水平的高低可能是影响种子发育的关键因素。
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| 关 键 词： | 紫梗籽银桂 种子发育 胚 胚乳 内源激素 |
| 收稿时间： | 2023-04-23 |
Changes of Endogenous Hormone Contents in Seed Development of Osmanthus fragrans ‘Zigengziyin’ |
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| ZHU Yong-li,SHEN Yong-bao.Changes of Endogenous Hormone Contents in Seed Development of Osmanthus fragrans ‘Zigengziyin’[J].Forest Research,2023,36(6):144-150. |
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| Authors: | ZHU Yong-li SHEN Yong-bao |
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| Institution: | 1. College of Art Design, Shanghai Business School, Shanghai 201400, China;2. College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;3. College of Forestry, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;4. Southern Tree Seed Inspection Center, National Forestry Administration, Nanjing 210037, Jiangsu, China;5. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Jiangsu, China |
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| Abstract: | Objective To investigate the changes in the content of four endogenous hormones in the embryo and endosperm during the development process of Osmanthus fragrans ‘Zigengziyin’ seeds, and to explore the patterns of endogenous hormone changes during this process. Method Osmanthus fragrans ‘Zigengziyin’ seeds were used to measure the contents of endogenous hormones auxin (IAA), gibberellin (GA3), zeatin nucleoside (ZR) and abscisic acid (ABA) in embryo and endosperm during different periods in seed development. Result During the development of seeds, GA3 contents in embryo decreased, but the ABA contents in embryo increased. IAA and ZR contents in embryo increased firstly then decreased and increased finally. The Ratio of GA3/ABA also decreased continuously. Both the ratios of IAA/ABA and ZR/ABA decreased firstly then increased. The change in GA3/ABA in the embryo was greater than the change in the ratios of IAA/ABA and ZR/ABA. The contents of GA3, IAA, and ZR in the endosperm decreased during the development, while the content of ABA first decreased, then increased, and remained stable. The ratios of GA3/ABA, IAA/ABA, and ZR/ABA decreased, and the variation amplitude of GA3/ABA ratio in endosperm was greater than that of IAA/ABA and ZR/ABA. Conclusion The dynamic changes in the content of four endogenous hormones in the embryo and endosperm during the seed development process of O. fragrans ‘Zigengziyin’exhibite a certain regularity. The ratio of GA3/ABA in embryo and endosperm both decrease, and the changes are greater than of the changes in IAA/ABA and ZR/ABA. The ratio of GA3/ABA may be the key factor affecting seed development. |
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| Keywords: | O fragrans ‘Zigengziyin’ seed development embryo endosperm endogenous hormone |
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