AI Article Synopsis
- - Soil cadmium (Cd) contamination negatively affects crop yield and quality, prompting research on maize, a major global cereal crop. - The study identified significant genotypic differences in Cd accumulation among 95 maize genotypes, singling out L42 (higher Cd concentration) and L63 (lower Cd concentration) for further analysis. - Under Cd stress, L63 demonstrated better growth and less transport of Cd to shoots compared to L42, which showed structural damage in cells, suggesting L63 could lead to better, low-Cd maize cultivars.
Article Abstract
Soil cadmium (Cd) contamination poses adverse impacts on crop yield and quality. Maize is a widely cultivated cereal throughout the world. In this study, field and hydroponic experiments were conducted to investigate the genotypic difference in Cd accumulation and tolerance in maize. There were significant genotypic differences in grain Cd concentrations among 95 genotypes. From these 95 genotypes, L42 which showed a higher grain Cd concentration and L63 which showed a lower grain Cd concentration was selected for further study. Under Cd stress, L63 showed much less reduction in plant growth than L42 compared with the control. Seedlings of L63 recorded higher Cd concentration in roots, but lower in shoots L42, indicating that the low grain Cd concentration in L63 is mainly due to the low rate of transportation of Cd from roots to shoots. Most Cd accumulated in epidermis and xylem vessels of L63, while the green fluorescent was found across almost the entire cross-section of root in L42. Obvious ultrastructural damage was observed in L42 under Cd stress, especially in mesophyll cells, while L63 was less affected. These findings could contribute to developing low Cd accumulation and high tolerance maize cultivars.
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| http://dx.doi.org/10.1007/s11356-021-16991-9 | DOI Listing |
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