Scholarlink

<p>Turnip (<i>Brassica rapa</i>), an important vegetable crop, is highly sensitive to nickel (Ni) stress, which adversely affects yield, growth, physiological and biochemical characteristics.&#xa0;The research assessed the mitigating effects of boric acid (BA) on Ni-induced toxicity in two turnip varieties, Purple Top and Golden Ball. Treatments of study were two nickel stress levels, control and 50 mg L<sup>− 1</sup>, and three levels of boric acid control, 100, and 200 mg L<sup>− 1</sup>.&#xa0;Nickel stress significantly reduced shoot length 42.6% and 55.9% and root length 40.9% and 63.2%, chlorophyll <i>a</i> up to 42.3 and 78.03%, and chlorophyll <i>b</i> 47.7 and 58.4% in Purple Top and Golden Ball, respectively. Boric acid application increased shoot length 18.7% and 33.7%, and root length 16.8% and 47.9% under Ni stress. Oxidative stress markers, MDA 10.5 and 20.3%, and H₂O₂ 41.5 and 43.09%, increased under Ni stress but were reduced by 200 mg L<sup>− 1</sup> BA MDA: 17.6 and 23.8%; H₂O₂: 12.4 and 22.3%. Enzymatic and non-enzymatic antioxidants were further enhanced by BA. Nickel stress disrupted mineral uptake by increasing Na⁺ and decreasing Ca²⁺ and K⁺. Nickel stress increased its accumulation in soil, shoot and seed, whereas boric acid lowered metal uptake and metal transfer factor (MTF), thus reducing human health risk indices (DMIA, HRIA, DMIC and HRIC). Overall, 200 mg L<sup>− 1</sup> BA effectively mitigated Ni toxicity by enhancing growth, physiological performance, antioxidative defense and mineral homeostasis in turnip.&#xa0;Overall, results revealed that the application of 200 mg L<sup>− 1</sup> boric acid effectively alleviated nickel toxicity by reducing metal accumulation, enhancing antioxidant defense, and improving growth and physiological traits in turnip plants.</p> Graphical Abstract <p></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

Foliar Application of Boric Acid Modulates the Morpho-Physiological Attributes and Health Risk Factors of Turnip (Brassica rapa L.) Under Nickel Accumulation Stress

  • 期刊论文

  • 发表日期：

    2026年8月3日

查看全文
  • Fizza Sajid,
  • Tahrim Ramzan,
  • Muhammad Shahbaz,
  • Arslan Haider,
  • Ejaz Ahmad Waraich,
  • Sundas Qadeer

摘要

Turnip (Brassica rapa), an important vegetable crop, is highly sensitive to nickel (Ni) stress, which adversely affects yield, growth, physiological and biochemical characteristics. The research assessed the mitigating effects of boric acid (BA) on Ni-induced toxicity in two turnip varieties, Purple Top and Golden Ball. Treatments of study were two nickel stress levels, control and 50 mg L− 1, and three levels of boric acid control, 100, and 200 mg L− 1. Nickel stress significantly reduced shoot length 42.6% and 55.9% and root length 40.9% and 63.2%, chlorophyll a up to 42.3 and 78.03%, and chlorophyll b 47.7 and 58.4% in Purple Top and Golden Ball, respectively. Boric acid application increased shoot length 18.7% and 33.7%, and root length 16.8% and 47.9% under Ni stress. Oxidative stress markers, MDA 10.5 and 20.3%, and H₂O₂ 41.5 and 43.09%, increased under Ni stress but were reduced by 200 mg L− 1 BA MDA: 17.6 and 23.8%; H₂O₂: 12.4 and 22.3%. Enzymatic and non-enzymatic antioxidants were further enhanced by BA. Nickel stress disrupted mineral uptake by increasing Na⁺ and decreasing Ca²⁺ and K⁺. Nickel stress increased its accumulation in soil, shoot and seed, whereas boric acid lowered metal uptake and metal transfer factor (MTF), thus reducing human health risk indices (DMIA, HRIA, DMIC and HRIC). Overall, 200 mg L− 1 BA effectively mitigated Ni toxicity by enhancing growth, physiological performance, antioxidative defense and mineral homeostasis in turnip. Overall, results revealed that the application of 200 mg L− 1 boric acid effectively alleviated nickel toxicity by reducing metal accumulation, enhancing antioxidant defense, and improving growth and physiological traits in turnip plants.

Graphical Abstract