Qi Wenjing, Bai Jinping, Yu Han, Han Guojun
Department of Bioscience, Changchun Normal University, No. 677, Changji North Road, Erdao District, Changchun 130032, China.
Plants (Basel). 2025 Apr 11;14(8):1191. doi: 10.3390/plants14081191.
Heavy metal contamination significantly threatens crop growth and global food security. Understanding plant responses to such stress is crucial to developing stress-tolerant crops. This study explores the physiological and biochemical responses of (L.) R. Wilczek to mercury, lead, and copper stress, focusing on the role of soluble sugar accumulation and biomass enhancement in conferring heavy metal tolerance.
Commercially available seeds were exposed to varying concentrations (50, 150, and 300 mg/L) of mercurous nitrate, lead nitrate, and copper chloride under controlled conditions. The germination rates, seedling growth, and physiological parameters such as the soluble sugar and protein content were analyzed using spectrophotometry and statistical methods, including ANOVA.
The results demonstrated that lead ion stress significantly increased the seedling dry weight, while all the tested heavy metals promoted soluble sugar accumulation. Although the heavy metals inhibited germination and growth at higher concentrations, exhibited strong tolerance at moderate stress levels.
This study highlights the adaptive strategies of , including soluble-sugar-mediated osmotic adjustment and enhanced biomass allocation, which contribute to its resilience under heavy metal stress. These findings provide insights for breeding stress-resistant crops and managing heavy-metal-contaminated environments.
重金属污染严重威胁作物生长和全球粮食安全。了解植物对这种胁迫的反应对于培育耐胁迫作物至关重要。本研究探讨了（L.）R. Wilczek对汞、铅和铜胁迫的生理生化反应，重点关注可溶性糖积累和生物量增加在赋予重金属耐受性方面的作用。
在可控条件下，将市售的种子暴露于不同浓度（50、150和300 mg/L）的硝酸亚汞、硝酸铅和氯化铜中。使用分光光度法和包括方差分析在内的统计方法分析发芽率、幼苗生长以及可溶性糖和蛋白质含量等生理参数。
结果表明，铅离子胁迫显著增加了幼苗干重，而所有测试重金属均促进了可溶性糖的积累。尽管在较高浓度下重金属抑制了发芽和生长，但在中等胁迫水平下表现出较强的耐受性。
本研究突出了（L.）R. Wilczek的适应策略，包括可溶性糖介导的渗透调节和增强的生物量分配，这有助于其在重金属胁迫下的恢复力。这些发现为培育抗胁迫作物和管理重金属污染环境提供了见解。
