Scholarlink

Background and aims <p>Extreme climate events due to global climate change are posing an increasing threat to crop production. Shading and waterlogging as a result of extreme rainfall events, frequently co-occur during jointing stage of wheat in the Yangtze River Region of China, but their combined effects on micronutrients such as iron and zinc remain poorly understood.</p> Methods <p>A two-year experiment was conducted using two cultivars (cv. Ningmai 13 and cv. Huaimai 33) under three shading levels (100%, 55%, and 25% of natural light), three soil water conditions (65%–70%, 95%–100% of field capacity, and 1–3 cm water layer), and three stress durations (5, 10, and 15 days). The Fe and Zn relationships between stress factors, and Fe and Zn uptake, partitioning, remobilization, and grain concentration were analyzed using structural equation modeling.</p> Results <p>Both shading and waterlogging significantly reduced Fe and Zn concentrations and accumulations in grains, and their combined effects were higher than individual stresses. The reduced radiation index (RRI) and waterlogging stress factor (WSF) showed significant negative and positive correlations with Fe and Zn concentrations, accumulation, and uptake, respectively. Combined shading and waterlogging stress at jointing stage both suppressed Fe and Zn uptake in the aboveground parts and reduced the remobilization rate from vegetative organs to grains. The cv. Ningmai 13 exhibits greater tolerance to combined stress than cv. Huaimai 33.</p> Conclusion <p>Enhancing trace element stress tolerance and re-transport capacity is crucial for maintaining wheat grain Fe and Zn nutritional quality under future extreme rainfall conditions.</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

Combined shading and waterlogging stress threaten grain mineral nutrition of wheat

  • 期刊论文

  • 发表日期：

    2026年7月2日

查看全文
  • Junhao Xu,
  • Zenghui Guo,
  • Jiangyi Shi,
  • Jiwei Huang,
  • Haoran Li,
  • Liujun Xiao,
  • Leilei Liu,
  • Liang Tang,
  • Weixing Cao,
  • Yan Zhu,
  • Bing Liu

摘要

Background and aims

Extreme climate events due to global climate change are posing an increasing threat to crop production. Shading and waterlogging as a result of extreme rainfall events, frequently co-occur during jointing stage of wheat in the Yangtze River Region of China, but their combined effects on micronutrients such as iron and zinc remain poorly understood.

Methods

A two-year experiment was conducted using two cultivars (cv. Ningmai 13 and cv. Huaimai 33) under three shading levels (100%, 55%, and 25% of natural light), three soil water conditions (65%–70%, 95%–100% of field capacity, and 1–3 cm water layer), and three stress durations (5, 10, and 15 days). The Fe and Zn relationships between stress factors, and Fe and Zn uptake, partitioning, remobilization, and grain concentration were analyzed using structural equation modeling.

Results

Both shading and waterlogging significantly reduced Fe and Zn concentrations and accumulations in grains, and their combined effects were higher than individual stresses. The reduced radiation index (RRI) and waterlogging stress factor (WSF) showed significant negative and positive correlations with Fe and Zn concentrations, accumulation, and uptake, respectively. Combined shading and waterlogging stress at jointing stage both suppressed Fe and Zn uptake in the aboveground parts and reduced the remobilization rate from vegetative organs to grains. The cv. Ningmai 13 exhibits greater tolerance to combined stress than cv. Huaimai 33.

Conclusion

Enhancing trace element stress tolerance and re-transport capacity is crucial for maintaining wheat grain Fe and Zn nutritional quality under future extreme rainfall conditions.