Guangdong Key Lab of Sugarcane Improvement and Biorefinery, Research Center for Sugarcane Industry Engineering Technology of Light Industry of China, Guangdong Provincial Bioengineering Institute, Guangzhou Sugarcane Industry Research Institute, Guangzhou, 510316, China.
Bull Environ Contam Toxicol. 2019 Dec;103(6):834-840. doi: 10.1007/s00128-019-02735-6. Epub 2019 Nov 2.
Sugarcane is a potential species for use in heavy metal remediation. To analyze the effect of excess copper on sugarcane, the biomass, mineral nutrient content and activities of antioxidative enzymes were measured under copper stress. The results revealed that the biomass of roots and shoots significantly decreased with increasing copper concentration in solution. Most copper accumulated in the roots, and the translocation factor of copper decreased with an increase in copper stress. The MDA content in sugarcane roots notably increased under copper stress. The POD activity in sugarcane roots increased, and CAT activity decreased under copper stress. The Zn, Fe and Mn contents in shoots increased significantly under 200 μmol L Cu treatments. The Zn and Mg contents in roots notably decreased under copper stress, while the Zn and Mg translocation factors increased. These results indicated that the increase in POD activity and the modification of mineral nutrient uptake and transfer might play an important role in reducing the detrimental effects of excess copper.
甘蔗是一种有潜力用于重金属修复的物种。为了分析过量铜对甘蔗的影响，在铜胁迫下测量了生物量、矿物质营养含量和抗氧化酶的活性。结果表明，随着溶液中铜浓度的增加，根和茎的生物量显著下降。大部分铜积累在根部，铜的迁移率随铜胁迫的增加而降低。在铜胁迫下，甘蔗根部的 MDA 含量显著增加。在铜胁迫下，甘蔗根部的 POD 活性增加，CAT 活性降低。在 200μmol L Cu 处理下，茎中的 Zn、Fe 和 Mn 含量显著增加。在铜胁迫下，根部的 Zn 和 Mg 含量明显下降，而 Zn 和 Mg 的迁移率增加。这些结果表明，POD 活性的增加以及矿物质营养吸收和转移的修饰可能在减轻过量铜的有害影响方面发挥重要作用。
