植物生态学报 ›› 2024, Vol. 48 ›› Issue (5): 638-650.DOI: 10.17521/cjpe.2022.0523  cstr: 32100.14.cjpe.2022.0523

• 研究论文 • 上一篇    下一篇

水毛花种子萌发特性的差异及休眠解除方法

袁涵1,2, 钟爱文1,2,*(), 刘送平1, 彭焱松1, 徐磊1   

  1. 1中国科学院庐山植物园, 江西九江 330000
    2南昌大学生命科学学院, 南昌 330031
  • 收稿日期:2022-12-31 接受日期:2023-10-07 出版日期:2024-05-20 发布日期:2024-01-22
  • 通讯作者: (zhongaw@lsbg.cn)
  • 基金资助:
    科技合作专项项目——省院及省校科技合作(重点项目)(20212BDH80012);江西省重点研发计划(20192BBFL60018)

Differences in the germination characteristics of Schoenoplectiella triangulata seeds and methods for breaking seed dormancy

YUAN Han1,2, ZHONG Ai-Wen1,2,*(), LIU Song-Ping1, PENG Yan-Song1, XU Lei1   

  1. 1Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi 330000, China
    2College of Life Sciences, Nanchang University, Nanchang 330031, China
  • Received:2022-12-31 Accepted:2023-10-07 Online:2024-05-20 Published:2024-01-22
  • Contact: (zhongaw@lsbg.cn)
  • Supported by:
    Special Project for Science and Technology Cooperation—Key Project of Science and Technology Cooperation Between Provincial Institutes and Universities(20212BDH80012);General Project of Jiangxi Province Key R&D Plan(20192BBFL60018)

摘要:

水毛花(Schoenoplectiella triangulata)是一种广泛应用于湿地植被恢复中的挺水植物, 探究不同地区水毛花种群种子的萌发特性与休眠特性对其种质收集和科学利用至关重要。该研究测定了水毛花种子形态特性、萌发特性的种群间差异, 并对其休眠机制进行探索, 结果显示: (1)水毛花的种子存在生理休眠, 其形态、千粒质量和吸水特性在种群间存在显著差异。(2)光照和变温条件有助于水毛花种子的萌发。(3)低温沙藏、低温水藏和常温沙藏有助于水毛花种子休眠的解除; 氟啶酮和赤霉素处理均有助于打破水毛花种子的休眠, 但在不同地区水毛花种群间存在差异。(4)不同地区水毛花种群间种子形态特性、萌发特性以及休眠特性的差异与采集地的环境因子相关。该研究结果表明水毛花种子应用于湿地生态修复时应考虑种源的问题, 在播种前对其进行适当处理可以提高发芽率和生态修复成效。

关键词: 莎草科, 水毛花, 种子萌发, 种子休眠, 层积

Abstract:

Aims Schoenoplectiella triangulata is an emergent plant species widely used in wetland vegetation restoration. It is important to study the germination and dormancy characteristics of S. triangulata seeds from different populations for germplasm collection and scientific utilization.

Methods In this study, differences in the morphological characteristics and germination characteristics of S. triangulata seeds were investigated, and the mechanisms of seed dormancy were explored.

Important findings (1) The seeds of S. triangulata showed physiological dormancy (PD), and there were significant differences in morphology, PD, 1 000-grain mass and water absorption characteristics among populations. (2) Light and variable temperature were conducive to seed germination of S. triangulata.(3) Sand storage at low temperatures, water storage at low temperatures and sand storage at normal temperatures helped to break the dormancy of S. triangulata seeds. Both fluridone and gibberellin treatments also helped to break the dormancy of S. triangulata seeds, but these effects varied among different populations. (4) Among different populations of S. triangulata, seed morphological characteristics, germination characteristics and dormancy characteristics were correlated with environmental conditions of the collection site. These results indicate that provenance should be considered when S. triangulata seeds were applied in wetland ecological restoration and that proper seed treatments before sowing could improve seed germination and the effectiveness of ecological restoration.

Key words: Cyperaceae, Schoenoplectiella triangulata, seed germination, seed dormancy, stratification