生物学杂志

生物学杂志 ›› 2023, Vol. 40 ›› Issue (1): 64-.doi: 10.3969/j.issn.2095-1736.2023.01.064

• 研究报告 • 上一篇    下一篇

铜胁迫对滇水金凤种子萌发及幼苗生长的影响

朱佳鹏1,2， 罗　超1， 李　洋1， 李芹梅1, 赵秋燕1， 汪　琼1， 黄美娟1， 黄海泉1   

  1. 1. 西南林业大学 园林学院 国家林业和草原局西南风景园林工程技术研究中心 西南林业大学园林
    园艺花卉研发中心， 昆明 650224； 2. 曲靖师范学院 文化旅游学院， 曲靖 655011
  • 出版日期:2023-02-18 发布日期:2023-02-21
  • 通讯作者: 黄海泉，博士，教授，主要从事风景园林植物研究，E-mail: 1429850238@qq.com
  • 作者简介:朱佳鹏，硕士，助教，主要从事风景园林规划设计与植物资源应用研究，E-mail: 643716669@qq.com
  • 基金资助:
    国家自然科学基金资助项目(32060364, 32060366, 31860230)； 云南省重点研发计划项目(2018BB013)； 云南省中青年学术和技术带头人培养项目(2015HB046, 2018HB024)； 云南省高校园林植物与观赏园艺科技创新团队支持计划资助、国家林业局西南风景园林工程技术研究中心项目(2016-48)

Effects of copper stress on seed germination and seedling growth of Impatiens uliginosa

ZHU Jiapeng1,2, LUO Chao1, LI Yang1, LI Qinmei1, ZHAO Qiuyan1, WANG Qiong1,HUANG Meijuan1, HUANG Haiquan1   

  1. 1. College of Landscape Architecture and Horticulture Science, Southwest Research Center for Engineering Technology
    of Landscape Architecture (State Forestry and Grassland Administration), Research and Development Center of
    Landscape Plants and Horticulture Flowers, Southwest Forestry University, Kunming 650224, China;
    2. Faculty of Culture and Tourism, Qujing Normal University, Qujing 655011, China
  • Online:2023-02-18 Published:2023-02-21

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摘要： 为探讨铜对滇水金凤种子萌发和幼苗生长的影响，以云南常见乡土水生植物滇水金凤为材料，分别采用5种不同浓度铜溶液（0、2.5、5、10和15 mg/L）处理种子和幼苗，并测定其种子发芽率、发芽势、发芽指数、活力指数和吸水特性以及幼苗的株高、根长和茎粗等指标。结果表明：滇水金凤种子萌发随铜浓度升高呈“低促高抑”的现象，当铜浓度为5 mg/L时，滇水金凤种子萌发达到最高，其发芽率、发芽势和发芽指数与对照相比分别增加8.89%、12.22%和6.44；当铜浓度大于10 mg/L时，种子的各项发芽指标均逐渐降低，且高浓度铜胁迫能够提前2 d终止种子萌发活动，在铜胁迫的48 h内，滇水金凤种子吸水萌发活动随时间变化呈现“快-慢-快”的趋势。此外，滇水金凤幼苗对铜胁迫敏感，当铜胁迫浓度大于5 mg/L时，其幼苗生长发育受到显著抑制。

关键词: 滇水金凤, 铜胁迫, 种子萌发, 吸水特性, 幼苗生长

Abstract: In order to investigate the effects of copper on seed germination and seedling growth of I. uliginosa, a common native aquatic plant in Yunnan was used as material in this study. The seeds and seedlings were treated with 5 different concentrations of copper (0, 2.5, 5, 10 and 15 mg/L) respectively, the germination rate, germination potential, germination index, vigor index and water absorption characteristics of the seeds as well as the seedling height, root length and stem diameter were determined. The results showed that the seed germination of I. uliginosa had a phenomenon of low promotion and high inhibition with the increase of copper concentration. When the copper concentration was 5 mg/L, the seed germination reached the highest and the germination rate, germination potential and germination index increased by 8.89%, 12.22% and 6.44 compared with that of CK respectively. When the concentration of copper was more than 10 mg/L, the germination indexes of seeds decreased gradually, and the high concentration of copper could stop the germination activity 2 days earlier. Within 48 h of copper stress, the water absorption germination activity of I. uliginosa seeds showed a “fast-slow-fast” trend with time. In addition, the seedlings were sensitive to copper stress. When the copper stress concentration was more than 5 mg/L, the growth and development of the seedlings were significantly inhibited.

Key words: Impatiens uliginosa, copper stress, seed germination, water absorption characteristic, seedling growth

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