数字农科院2.0

Phosphorus Supplementation Enhances Growth and Antioxidant Defense Against Cadmium Stress in Cotton

文献类型： 外文期刊

作者： Asif Iqbal;Huiping Gui;Cangsong Zheng;Xiangru Wang;Xiling Zhang;Meizhen Song;Xiaoyan Ma

作者机构：

关键词： antioxidant system;cadmium stress;cotton;osmotic adjustment;phosphorus;reactive oxygen species

期刊名称： Antioxidants

ISSN： 2076-3921

年卷期： 2025 年 14 卷 6 期

页码：

收录情况： SCIE（2025版）

摘要： Cadmium (Cd) contamination in agricultural soils is increasing due to anthropogenic activities, posing a significant threat to plant growth and productivity. Phosphorus (P) has been suggested as a potential mitigator of Cd toxicity, yet the role of cotton genotypes with contrasting low-P tolerance in contaminated soils remains largely unexplored. A hydroponic experiment was conducted to assess the effects of Cd stress (5 μM) on Jimian169 (strong-low-P tolerant) and DES926 (weak-low-P tolerant) cotton genotypes under low-P (0.01 mM KH2PO4) and normal P (1 mM KH2PO4) conditions. The results revealed that Cd stress, especially under low-P, significantly reduced plant growth, dry matter, photosynthetic rate, and P use efficiency (PUE), while increasing oxidative damage through increased malonaldehyde levels and reactive oxygen species accumulation. These adverse impacts were very much evident in DES926 compared to Jimian169. In contrast, Jimian169 demonstrated greater resilience to Cd stress by mitigating oxidative damage through enhanced antioxidant enzyme activity, improved photosynthetic performance, and increased accumulation of osmoprotectants. These findings indicate that Jimian169 can better withstand Cd toxicity by enhancing photosynthesis, antioxidant defense mechanisms, and osmotic adjustment. This makes them a promising candidate for cultivation in Cd-contaminated, P-deficient soils.

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