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Development, Function, and Environmental Plasticity of the Root Endodermal Diffusion Barrier: from the Casparian Strip to the Suberin Lamellae
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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, *
Bulletin of Botanical Research | 2026, 46(4) : 599 - 612
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Bulletin of Botanical Research | 2026, 46(4): 599-612
• Review Article •
Development, Function, and Environmental Plasticity of the Root Endodermal Diffusion Barrier: from the Casparian Strip to the Suberin Lamellae
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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, *
Affiliations
  • 1College of Biological Sciences and Biotechnology，Beijing Forestry University，Beijing 100083
  • 2State Key Laboratory of Tree Genetics and Breeding，College of Biological Sciences and Biotechnology，Beijing Forestry University，Beijing 100083
  • 3National Engineering Research Center for Forest Breeding and Ecological Restoration，Beijing 100083
Published: 2026-07-20 doi: 10.7525/j.issn.1673-5102.2026.04.003
Outline
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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.

endodermis  /  Casparian strip  /  suberin lamellae  /  diffusion barrier  /  environmental plasticity
蔺宏霞, 熊金缘, 张玉倩, 牛倩, 汪江明, 张曦, 赵媛媛. 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. 植物研究, 2026 , 46 (4) : 599 -612 . DOI: 10.7525/j.issn.1673-5102.2026.04.003
Hongxia LIN, Jinyuan XIONG, Yuqian ZHANG, Qian NIU, Jiangming WANG, Xi ZHANG, Yuanyuan ZHAO. Development, Function, and Environmental Plasticity of the Root Endodermal Diffusion Barrier: from the Casparian Strip to the Suberin Lamellae[J]. Bulletin of Botanical Research, 2026 , 46 (4) : 599 -612 . DOI: 10.7525/j.issn.1673-5102.2026.04.003
Appendix
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Year 2026 volume 46 Issue 4
223
104
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Article Info
doi: 10.7525/j.issn.1673-5102.2026.04.003
  • Receive Date：2026-03-06
  • Online Date：2026-09-16
  • Published：2026-07-20
Article Data
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  • Received：2026-03-06
Affiliations
    1College of Biological Sciences and Biotechnology，Beijing Forestry University，Beijing 100083
    2State Key Laboratory of Tree Genetics and Breeding，College of Biological Sciences and Biotechnology，Beijing Forestry University，Beijing 100083
    3National Engineering Research Center for Forest Breeding and Ecological Restoration，Beijing 100083
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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