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Updated: Jun 3, 2026

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Published on: June 7, 2024

Spring low temperature stress reduces wheat yield by accelerating post-anthesis flag leaf senescence via ROS

Xiang Chen1, Weixiang Huang1, Li Yang1

  • 1College of Agriculture, Anhui Agricultural University, National Engineering Laboratory of Crop Stress Resistance Breeding, Institute of Hefei Artificial Intelligence Breeding Accelerator Co. Ltd, Huaibei Field Comprehensive Scientific Observation and Research Station of the Ministry of Agriculture and Rural Affairs, Hefei, 230036, Anhui, China.

Plant Physiology and Biochemistry : PPB
|June 1, 2026
PubMed
Summary
This summary is machine-generated.

Spring low-temperature stress (SLTS) significantly impacts wheat yield by accelerating flag leaf senescence and disrupting antioxidant balance. This study reveals key physiological markers linked to yield loss, offering insights for breeding resilient wheat varieties.

Keywords:
Chilling stressLeavesOxygen stressTriticum aestivum L.Yield

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Last Updated: Jun 3, 2026

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06:41

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Published on: March 28, 2025

Area of Science:

  • Agricultural Science
  • Plant Physiology
  • Climate Change Adaptation

Background:

  • Spring low-temperature stress (SLTS) is a growing threat to wheat (Triticum aestivum L.) production due to global warming.
  • The long-term physiological consequences of SLTS on wheat post-anthesis development are not well understood.

Purpose of the Study:

  • To investigate the physiological legacy effects of SLTS on wheat flag leaf senescence and grain yield.
  • To identify key physiological indicators associated with yield reduction under SLTS.

Main Methods:

  • Wheat cultivars with differing SLTS resistance (Yannong19 and Xinmai26) were subjected to control (10°C), mild (2°C), and severe (-2°C) low-temperature stress at anther differentiation.
  • Evaluated flag leaf senescence, SPAD values, antioxidant metabolism (SOD, POD, CAT activities), reactive oxygen species (H₂O₂, MDA), and grain yield.
  • Utilized Random Forest analysis to determine yield-influencing physiological factors.

Main Results:

  • SLTS accelerated flag leaf senescence, reduced SPAD values, and decreased grain yield (9-42%), with greater impact on the susceptible cultivar Xinmai26.
  • SLTS lowered soluble sugar, soluble protein, and glutathione (GSH) content, along with SOD, POD, and CAT activities.
  • Accumulation of hydrogen peroxide (H₂O₂) and malondialdehyde (MDA) was observed, particularly under severe stress and in the susceptible cultivar.
  • Random Forest analysis identified early-stage POD activity and SPAD values, followed by late-stage H₂O₂ and GSH, as primary drivers of yield variation.

Conclusions:

  • SLTS disrupts antioxidant homeostasis, leading to accelerated post-anthesis flag leaf senescence and significant wheat yield loss.
  • Physiological markers like POD activity, SPAD values, H₂O₂, and GSH content are critical indicators of SLTS impact on wheat yield.
  • Findings provide valuable insights for developing strategies to enhance wheat resilience against climate change-induced low-temperature stress.