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<p>Peanut plants are highly sensitive to phosphorus (P) deficiency, which leads to nutritional and physiological impairments. Low soil P availability is common in regions where this crop is cultivated. Silicon (Si) may serve as a strategic, environmentally safe ally capable of mitigating nutritional losses and enhancing the resilience of this oilseed crop. In this study, we provide the first comprehensive assessment of the effects of P deficiency on the oxidative and physiological metabolism of peanut plants and, particularly, the potential of Si to mitigate these biological damages in a non-Si-accumulating species. An experiment was conducted with peanut plants under a bifactorial design, including two P conditions (deficiency and sufficiency) and two Si supply levels (0 and 2 mM), with five replications. P deficiency reduced P concentration, accumulation, and uptake and use efficiency in peanut plants, while increasing malondialdehyde accumulation, enhancing stress-related compounds, decreasing photosynthetic pigments and sugars, and ultimately limiting plant growth. We found that Si supply acted as a modulator by alleviating the adverse effects of P limitation, reducing oxidative stress, preserving photosystem II integrity, maintaining energetic compounds, and promoting greater peanut plant growth. In plants grown under adequate P supply, Si also provided additional benefits, including increased leaf number, higher reserve accumulation, and enhanced structural reinforcement, confirming its role as a growth-promoting and resilience-enhancing element even under non-stress conditions. The findings of this study advance the understanding of Si’s potential to enhance tolerance to P restriction in challenging environments and, although to a lesser extent, demonstrate its beneficial effects in non-stressed plants, thereby supporting the sustainable development of peanut cultivation.</p>

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Silicon-induced Mechanisms Enhancing Peanut Tolerance to Phosphorus Deficiency

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Jasseliny Aparecida Branco de Moraes Formigoni,
  • Renato de Mello Prado,
  • Milton Garcia Costa,
  • Gustavo Caione

摘要

Peanut plants are highly sensitive to phosphorus (P) deficiency, which leads to nutritional and physiological impairments. Low soil P availability is common in regions where this crop is cultivated. Silicon (Si) may serve as a strategic, environmentally safe ally capable of mitigating nutritional losses and enhancing the resilience of this oilseed crop. In this study, we provide the first comprehensive assessment of the effects of P deficiency on the oxidative and physiological metabolism of peanut plants and, particularly, the potential of Si to mitigate these biological damages in a non-Si-accumulating species. An experiment was conducted with peanut plants under a bifactorial design, including two P conditions (deficiency and sufficiency) and two Si supply levels (0 and 2 mM), with five replications. P deficiency reduced P concentration, accumulation, and uptake and use efficiency in peanut plants, while increasing malondialdehyde accumulation, enhancing stress-related compounds, decreasing photosynthetic pigments and sugars, and ultimately limiting plant growth. We found that Si supply acted as a modulator by alleviating the adverse effects of P limitation, reducing oxidative stress, preserving photosystem II integrity, maintaining energetic compounds, and promoting greater peanut plant growth. In plants grown under adequate P supply, Si also provided additional benefits, including increased leaf number, higher reserve accumulation, and enhanced structural reinforcement, confirming its role as a growth-promoting and resilience-enhancing element even under non-stress conditions. The findings of this study advance the understanding of Si’s potential to enhance tolerance to P restriction in challenging environments and, although to a lesser extent, demonstrate its beneficial effects in non-stressed plants, thereby supporting the sustainable development of peanut cultivation.