植物研究 ›› 2026, Vol. 46 ›› Issue (4): 599-612.doi: 10.7525/j.issn.1673-5102.2026.04.003

• 综述文章 • 上一篇    下一篇

根内皮层扩散屏障的发育、功能与环境可塑性——从凯氏带到木栓质片层

蔺宏霞1,2,3, 熊金缘1,2,3, 张玉倩1,2,3, 牛倩1,2,3, 汪江明1,2,3, 张曦1,2,3, 赵媛媛1,2,3()   

  1. 1.北京林业大学生物科学与技术学院,北京 100083
    2.北京林业大学生物科学与技术学院林木遗传育种全国重点实验室,北京 100083
    3.国家森林育种与生态恢复工程技术研究中心,北京 100083
  • 收稿日期:2026-03-06 出版日期:2026-07-20 发布日期:2026-07-22
  • 通讯作者: 赵媛媛 E-mail:yyzhao@bjfu.edu.cn
  • 作者简介:蔺宏霞(2000—),女,硕士研究生,主要从事木本植物生长发育研究。
  • 基金资助:
    中国林木种子集团合作项目(2024-HXFW-168);中国林木种子集团合作项目(2025-HXKF-077);国家外国专家项目(H20250823)

Development, Function, and Environmental Plasticity of the Root Endodermal Diffusion Barrier: from the Casparian Strip to the Suberin Lamellae

Hongxia LIN1,2,3, Jinyuan XIONG1,2,3, Yuqian ZHANG1,2,3, Qian NIU1,2,3, Jiangming WANG1,2,3, Xi ZHANG1,2,3, Yuanyuan ZHAO1,2,3()   

  1. 1.College of Biological Sciences and Biotechnology,Beijing Forestry University,Beijing 100083
    2.State Key Laboratory of Tree Genetics and Breeding,College of Biological Sciences and Biotechnology,Beijing Forestry University,Beijing 100083
    3.National Engineering Research Center for Forest Breeding and Ecological Restoration,Beijing 100083
  • Received:2026-03-06 Online:2026-07-20 Published:2026-07-22
  • Contact: Yuanyuan ZHAO E-mail:yyzhao@bjfu.edu.cn

摘要:

陆地植物根系处于干旱、盐胁迫与养分失衡等复杂土壤环境时,需在高效获取水分和养分与有效阻滞溶质外泄、选择性屏蔽有害离子之间实现动态权衡。内皮层(endodermis)作为维管植物根组织中的关键结构层,其凯氏带与木栓质片层构成连续的质外体屏障,通过调控径向运输路径,在生理层面维持离子与水分稳态。本文综述了凯氏带与木栓质片层的生物合成与沉积、结构特征,及其在MYB36通路与Schengen监测通路协同调控下的可塑性;探讨了该屏障结构在矿质养分稳态维持、抗逆性形成及根际互作中的功能研究进展;并从进化适应与作物改良角度对未来研究方向进行展望,为深入理解植物根系适应性进化及抗逆育种提供新思路。

关键词: 内皮层, 凯氏带, 木栓质片层, 扩散屏障, 环境可塑性

Abstract:

When confronted with complex soil environments such as drought, salinity, and nutrient imbalance, terrestrial plant roots have to achieve a dynamic trade-off between efficient acquisition of water and nutrients, effective blockage of solute leakage, and selective exclusion of harmful ions. The endodermis, a key structural layer in the roots of vascular plants, forms a continuous apoplastic barrier through the Casparian strip and suberin lamellae, thereby maintaining ionic and water homeostasis at the physiological level by regulating radial transport pathways. This review synthesized current knowledge on the biosynthesis, deposition, and structural characteristics of the Casparian strip and suberin lamellae. It further discussed their plasticity under the coordinated regulation of the MYB36 pathway and the Schengen surveillance pathway. Recent advances in understanding the roles of these barrier structures in maintaining mineral nutrient homeostasis, enhancing stress resistance, and mediating rhizosphere interactions were examined. Finally, future research directions were proposed from the perspectives of evolutionary adaptation and crop improvement. This review provided novel insights for a deeper understanding of the adaptive evolution of plant roots and stress-resistant breeding.

Key words: endodermis, Casparian strip, suberin lamellae, diffusion barrier, environmental plasticity

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