草地学报 ›› 2026, Vol. 34 ›› Issue (4): 1288-1301.DOI: 10.11733/j.issn.1007-0435.2026.04.014

• 研究论文 • 上一篇    

干旱胁迫下伊犁绢蒿幼苗根系的构型、生理与解剖结构响应研究

张浩浩, 张永强, 蒋昂辰, 陈爱萍   

  1. 新疆农业大学草业学院/西部干旱荒漠区草地资源与生态教育部重点实验室/新疆草地资源与生态实验室, 新疆 乌鲁木齐 830000
  • 收稿日期:2025-04-24 修回日期:2025-07-25 发布日期:2026-04-15
  • 通讯作者: 陈爱萍,E-mail:xjauchenaiping@sina.com
  • 作者简介:张浩浩(2000-),男,汉族,湖北十堰人,硕士研究生,主要从事草种质资源与育种方面研究,E-mail:3353360540@qq.com;
  • 基金资助:
    伊犁绢蒿苗期干旱胁迫应答机制研究及抗旱基因的筛选与功能验证(32160341)资助

Research on the Response of Root System Configuration, Physiology and Anatomical Structure of Seriphidium transiliense Seedlings under Drought Stress

ZHANG Hao-hao, ZHANG Yong-qiang, JIANG Ang-chen, CHEN Ai-ping   

  1. College of Grassland Science, Xinjiang Agricultural University, Key Laboratory for Western Arid Region Grassland Resources and Ecology, Ministry of Education, Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang 830000, China
  • Received:2025-04-24 Revised:2025-07-25 Published:2026-04-15

摘要: 本研究以伊犁绢蒿(Seriphidium transiliense)幼苗为研究对象,通过持续干旱胁迫盆栽实验,系统探究了根系形态构型、生理响应及解剖结构的动态变化规律。结果表明:随着干旱胁迫强度的增加,根系形态拓扑指数和分形维数逐渐降低,根系分支模式向更高效的叉状结构转变。随着干旱胁迫增强,生理代谢层面,活性氧积累、膜脂过氧化程度及渗透调节能力显著增强,抗氧化酶活性呈现先升高后降低的趋势。解剖结构分析显示,根尖的表皮和内皮层细胞增厚以增强保水能力,而皮层薄壁组织、维管系统及根尖直径均呈现减小趋势,以优化水分运输效率。本研究揭示了伊犁绢蒿通过整合根系构型可塑性、生理调控及解剖结构优化的适应策略,为荒漠植物抗旱机制研究提供了科学依据,同时为干旱区生态恢复及抗逆种质选育提供了重要参考。

关键词: 伊犁绢蒿, 干旱胁迫, 根系构型, 生理特性, 根尖解剖结构

Abstract: In this study, we used S. transiliense seedlings as a research object and conducted a pot experiment with continuous drought stress to systematically investigate the dynamic changes in root system morphology, physiological response and anatomical structure. The results showed that with the increass of drought stress intensity, root system morphology changed significantly, with a decrease in topological index and fractal dimension, and a shift in root branching patterns towards a more efficient “dendritic” structure. At the physiological level, there was a significant accumulation of reactive oxygen species (ROS), increase in membrane lipid peroxidation and enhanced ability to regulate osmosis. Antioxidant enzyme activity showed a trend of increasing first and then decreasing. The anatomical structure analysis revealed that the root tip epidermal and endodermal cells thickened to enhance water-holding capacity, while the cortical parenchyma, vascular system and root tip diameter all showed a decreasing trend to optimize water transport efficiency. This study revealed the adaptive strategy of S. transiliense by integrating root system configuration plasticity, physiological regulation, and anatomical structure optimization, providing a scientific basis for studying the drought resistance mechanisms of desert plants and also offering an important reference for ecological restoration and breeding in arid areas.

Key words: Seriphidium transiliense, Drought stress, Root system configuration, Physiological traits, Root tip anatomical structure

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