亚热带植物科学 ›› 2025, Vol. 54 ›› Issue (4): 408-419.DOI: 10.3969/j.issn.1009-7791.2025.04.005

• 研究论文 • 上一篇    下一篇

涝渍胁迫对矾根生长和生理特性的影响

兰梦云*   

  1. (贵州大学林学院,贵州 贵阳 550025)
  • 收稿日期:2025-04-16 接受日期:2025-06-17 出版日期:2025-08-30 发布日期:2025-10-13
  • 通讯作者: 兰梦云
  • 基金资助:
    贵州大学研究生重点课程建设项目“山地城市绿地系统规划”(ZDKC[2017001])

Effects of Waterlogging Stress on the Growth and Physiological Characteristics of Heuchera micrantha

LAN Meng-yun*   

  1. (School of Forestry, Guizhou University, Guiyang 550025, Guizhou China)
  • Received:2025-04-16 Accepted:2025-06-17 Online:2025-08-30 Published:2025-10-13
  • Contact: LAN Meng-yun

摘要: 通过人工模拟涝渍试验,探究矾根Heuchera micrantha生长和生理特性对水分胁迫的响应。结果表明,涝渍胁迫下,矾根株高和叶片的生长速度均小于对照;在胁迫5~10 d,矾根鲜重和干重均显著大于对照;胁迫15~25 d,鲜重和干重均显著小于对照。叶片内超氧化物歧化酶(SOD)和过氧化物酶(POD)活性、可溶性糖和可溶性蛋白含量以及根系活力随着涝渍胁迫时间增加呈先上升后下降趋势,过氧化氢酶(CAT)活性在胁迫过程中变化趋势较平稳且维持较高水平。随着涝渍胁迫时间增加,矾根叶片光合色素含量表现为叶绿素a含量呈先上升后下降趋势,叶绿素b含量和总叶绿素含量呈波动变化,类胡萝卜素含量呈逐渐上升趋势。生理指标之间达显著(P<0.05)或极显著(P<0.01)相关性的数量在对照组中分别占指标总数的12.12%和9.09%,在渍水组中分别占9.09%和7.58%;淹水组中分别占18.18%和4.55%。不同淹水深度下,矾根株高和叶片生长受到不同程度抑制,淹水越深抑制作用越明显;短期的涝渍胁迫对矾根鲜重和干重有促进作用,而随着胁迫时间增加,鲜重和干重会显著减少且表现为淹水组<渍水组<CK;而各生理指标对不同淹水深度的响应规律具有差异性。

关键词: 矾根, 涝渍胁迫, 形态, 生理

Abstract: This study conducted artificial simulated waterlogging stress experiments to explore the growth and physiological responses of Heuchera micrantha to waterlogging stress, aiming to provide a theoretical basis for its application and management in garden greening. The results showed that the growth rates of plant height and leaves in H. micrantha were lower under waterlogging stress than those in the control group. During the 5–10 days of stress, the fresh weight and dry weight of H. micrantha were significantly higher than those of the control group; however, from day 15 to day 25 of stress, both fresh weight and dry weight were significantly lower than those of the control group. The activities of superoxide dismutase (SOD) and peroxidase (POD), and contents of soluble sugar, soluble protein in leaves, and root activity exhibited a trend of first increasing and then decreasing with the prolongation of waterlogging stress. Catalase (CAT) maintained a relatively high activity level with a stable trend throughout the stress period. For photosynthetic pigment contents, chlorophyll a showed a pattern of initial increase followed by decrease, chlorophyll b and total chlorophyll fluctuated, and carotenoid content gradually increased as waterlogging stress duration extended. Correlation analysis indicated that the proportions of significantly (P<0.05) and extremely significantly (P<0.01) correlated physiological indices were 12.12% and 9.09% in the control group, 9.09% and 7.58% in the waterlogging group, and 18.18% and 4.55% in the flooding group, respectively. Above all, plant height and leaf growth of H. micrantha were inhibited to varying degrees under different waterlogging depths, with more pronounced inhibition observed at greater depths. Short-term waterlogging stress promoted fresh weight and dry weight, but prolonged stress led to significant reductions, following the order: flooding group < waterlogging group < control group. Physiological indices displayed diverse response patterns to different waterlogging depths, providing a scientific theoretical foundation for the application and management of H. micrantha in urban garden greening.

Key words: Heuchera micrantha, waterlogging stress, morphology, physiology

中图分类号: