| 钝叶柃不同性别植株花期叶片内源激素含量的变化 |
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| 引用本文： | 李运婷,宗秀虹,张华雨,邓洪平.钝叶柃不同性别植株花期叶片内源激素含量的变化[J].园艺学报,2016,43(7):1411-1418. |
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| 作者姓名： | 李运婷 宗秀虹 张华雨 邓洪平 |
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| 作者单位： | （西南大学生命科学学院，三峡库区生态环境教育部重点实验室，重庆 400715） |
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| 基金项目： | 科技部国家科技基础条件平台项目(2005DKA21403-JK) |
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| 摘 要： | 柃木属(Eurya Thunb.)植物为严格的雌雄异株植物,性别变异现象极为少见。但作者野外调查发现,钝叶柃(Eurya obtusifolia H.T.Chang)存在显著的性别变异现象。以钝叶柃雌株、雄株和两性株花发育过程中关键时期的叶片为材料,采用高效液相色谱法对生长素(IAA)、赤霉素(GA_3)、玉米素核苷(ZR)和脱落酸(ABA)的含量进行测定和比值比较,并分析其动态变化规律。结果表明:在钝叶柃3种性别植株花发育过程中,叶片中GA_3和ZR含量增加有利于雄花和两性花的发育,高水平IAA有明显的促雌效应,ABA对性别分化的影响还不确定。在激素平衡中,ABA/ZR、IAA/ZR、GA_3/ZR比值的增加对雌花的发育有促进作用,而较高的ABA/IAA、GA3/IAA比值更有助于雄花的发育。
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| 关 键 词： | 钝叶柃 性别变异 叶片 内源激素 |
Variation of Endogenous Hormones in the Leaves of Male,Female and Hermaphrodite Plants of Eurya obtusifolia During Flowering Stages |
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| LI Yun-ting,ZONG Xiu-hong,ZHANG Hua-yu,DENG Hong-ping.Variation of Endogenous Hormones in the Leaves of Male,Female and Hermaphrodite Plants of Eurya obtusifolia During Flowering Stages[J].Acta Horticulturae Sinica,2016,43(7):1411-1418. |
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| Authors: | LI Yun-ting ZONG Xiu-hong ZHANG Hua-yu DENG Hong-ping |
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| Institution: | （Key Laboratory of Eco-Environment in Three Gorges Reservoir Region of Ministry of Education，School of Life Sciences，Southwest University，Chongqing 400715，China） |
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| Abstract: | The genus Eurya Thunb. was described as strict dioecy in most of the previous literatures，and gender variation was rarely observed. Gender variation was found in Eurya obtusifolia H. T. Chang during the field investigation. Leaves materials were collected from female，male and hermaphrodite plants. The contents of endogenous hormone（IAA，GA3，ZR and ABA）were determined by HPLC，then hormone proportion and hormone dynamics were analyzed. The results showed that，the increase of GA3 and ZR contents was beneficial to the development of male and hermaphrodite flowers. High level of IAA contents promoted the development of female flowers. ABA had uncertain effect on sexual differentiation. High ABA/ZR，IAA/ZR，GA3/ZR ratios could promote the development of female flowers，while high ABA/IAA and GA3/IAA ratios were beneficial to male flowers development. |
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| Keywords: | Eurya obtusifolia gender variation leaf endogenous hormone |
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