Su Yang, Huang Xin, Li Ling, Muhammad Zahir Ahsan, Li Meilin, Zheng Tengda, Guo Zhe, Zhang Yue, Luo Dan, Ye Xiaoying, Jia Xiaomei, Hussain Panhwar Faiz, Tun Myo Thuzar, Zhu Jianqing
Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu 611130, China.
Demonstration Base for International Science & Technology Cooperation of Sichuan Province, 211, Huimin Road, Wenjiang District, Chengdu 611130, China.
Foods. 2023 Apr 15;12(8):1656. doi: 10.3390/foods12081656.
Cadmium (Cd), a highly toxic heavy metal for crops in China, poses a significant threat to rice cultivation. It is crucial to identify the genotypes with robust resistance to heavy metals, including Cd, in rice. The experiment was conducted to examine the mitigation effect of silicon (Si) on Cd toxicity levels in Se-enriched Z3055B and non-Se-enriched G46B rice genotypes. A basal dose of Si improved the growth and the quality of rice significantly by reducing the Cd content in rice roots, stems, leaves and grains and increased the yield, biomass and selenium (Se) content of brown rice in both genotypes. Additionally, Se content in brown rice and polished rice was notably higher in Se-enriched rice than in non-Se-enriched rice, with the highest amount at 0.129 mg/kg and 0.085 mg/kg, respectively. The results demonstrated that a basal fertilizer concentration of 30 mg/kg of Si was more effective in reducing Cd transport from roots to shoots in Se-enriched rice than in non-Se-enriched rice genotypes. Therefore, it can be concluded that Se-enriched rice genotypes are a viable option for food crop production in Cd-contaminated areas.
镉（Cd）在中国是对农作物毒性很强的重金属，对水稻种植构成重大威胁。鉴定水稻中对包括镉在内的重金属具有强大抗性的基因型至关重要。进行该实验是为了研究硅（Si）对富硒Z3055B和非富硒G46B水稻基因型中镉毒性水平的缓解作用。基础剂量的硅通过降低水稻根、茎、叶和籽粒中的镉含量，显著改善了水稻的生长和品质，并提高了两种基因型糙米的产量、生物量和硒（Se）含量。此外，富硒水稻糙米和精米中的硒含量明显高于非富硒水稻，最高含量分别为0.129毫克/千克和0.085毫克/千克。结果表明，基础肥料浓度为30毫克/千克的硅在降低富硒水稻中镉从根部向地上部转运方面比非富硒水稻基因型更有效。因此，可以得出结论，富硒水稻基因型是镉污染地区粮食作物生产的可行选择。
