Scholarlink

Aims <p>Waterlogging is a major abiotic stress for riparian plants and poses a serious threat to their survival. <i>Salix viminalis</i> L., an important riparian species, exhibits strong waterlogging tolerance, with aquatic adventitious roots (AAR) playing a key role. However, how their root system architecture (RSA) responds dynamically to waterlogging and the associated structural basis for resource acquisition remain unclear.</p> Methods <p>Waterlogging was simulated to induce AAR in <i>S. viminalis</i>, and dynamic morphological, topological, fractal, and anatomical traits were systematically analyzed to suggest potential resource-acquisition strategies based on structural proxies.</p> Results <p>The primary roots (PR) showed significant reductions in total root length (TRL), specific root length (SRL), root surface area (SA), specific root surface area (SRSA), root volume (RV), root tip number (RT), and root fork number (RF), while average root diameter (RAD) remained unchanged. In contrast, all metrics in AAR increased significantly, while RAD decreased, expanding the interface for resource acquisition. In topology, the topological index (TI) of AAR progressively decreased, with the architecture shifting from a herringbone to a dichotomous pattern. In fractal traits, AAR exhibited increased fractal dimension (FD) and fractal abundance (FA), indicating higher complexity and space-filling capacity. Anatomically, PR maintained function early in waterlogging via epidermal densification and cortical aerenchyma formation but structural deteriorated over time. AAR, however, developed well-structured aerenchyma.</p> Conclusions <p>This study reveals the adaptive changes of root systems in waterlogging-tolerant plants to soil environments under waterlogged conditions, providing valuable reference for the application of <i>S. viminalis</i> in riparian ecosystem restoration.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dynamic structural adjustments in root system architecture of aquatic adventitious roots for resource acquisition in Salix viminalis L. under waterlogging stress

  • 期刊论文

  • 发表日期：

    2026年3月6日

查看全文
  • Feifei Zhai,
  • Menglong Yin,
  • Haidong Li,
  • Zhenjian Li,
  • Shaowei Zhang,
  • Shanjun Yi,
  • Jing Li,
  • Yunxing Zhang

摘要

Aims

Waterlogging is a major abiotic stress for riparian plants and poses a serious threat to their survival. Salix viminalis L., an important riparian species, exhibits strong waterlogging tolerance, with aquatic adventitious roots (AAR) playing a key role. However, how their root system architecture (RSA) responds dynamically to waterlogging and the associated structural basis for resource acquisition remain unclear.

Methods

Waterlogging was simulated to induce AAR in S. viminalis, and dynamic morphological, topological, fractal, and anatomical traits were systematically analyzed to suggest potential resource-acquisition strategies based on structural proxies.

Results

The primary roots (PR) showed significant reductions in total root length (TRL), specific root length (SRL), root surface area (SA), specific root surface area (SRSA), root volume (RV), root tip number (RT), and root fork number (RF), while average root diameter (RAD) remained unchanged. In contrast, all metrics in AAR increased significantly, while RAD decreased, expanding the interface for resource acquisition. In topology, the topological index (TI) of AAR progressively decreased, with the architecture shifting from a herringbone to a dichotomous pattern. In fractal traits, AAR exhibited increased fractal dimension (FD) and fractal abundance (FA), indicating higher complexity and space-filling capacity. Anatomically, PR maintained function early in waterlogging via epidermal densification and cortical aerenchyma formation but structural deteriorated over time. AAR, however, developed well-structured aerenchyma.

Conclusions

This study reveals the adaptive changes of root systems in waterlogging-tolerant plants to soil environments under waterlogged conditions, providing valuable reference for the application of S. viminalis in riparian ecosystem restoration.