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| 30个小麦品系的镉积累能力评价及耐镉品系根系生长特征 |
| Evaluation of Cadmium Accumulation Capacity and Root Growth Characteristics of 30 Wheat Varieties（Lines）from Huang Huai Region |
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| DOI： |
| 中文关键词: 小麦 镉 根系 幼苗 |
| 英文关键词:Wheat Cadmium Root system Seedling |
| 基金项目: |
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| 摘要点击次数: 41 |
| 全文下载次数: 22 |
| 中文摘要: |
| 小麦作为我国重要的粮食作物，其产量和品质受多种因素影响，其中土壤镉严重威胁着小麦安全生产，因此筛选小麦镉低积累品种对解决镉污染耕地小麦安全生产具有重要意义。本研究选取黄淮麦区30个小麦品种（系），通过土培试验，设置0g/L、2.5g/L、5g/L三个镉离子浓度水平，探究了小麦镉积累能力和镉胁迫条件下小麦幼苗根系指标与镉积累之间的关系。结果表明：镉胁迫能够显著抑制小麦苗期生长，但对幼苗有机物积累影响较小，且镉元素大部分积累在小麦幼苗根系内，同时品种间差异显著； 镉对高积累品种小麦根系的抑制作用较大，而对低积累品种根系抑制作用较小。研究 筛选出了西农889、新麦36、周麦36、豫麦51、淮麦18等5个镉低积累品种；初步解释了小麦苗期根系形态与镉积累能力的相关性，为黄淮麦区小麦品种筛选及镉污染耕地小麦安全生产提供了一定的参考。 |
| 英文摘要: |
| Wheat, a crucial food crop in China, challenges affecting yield and quality from multiple environmental factors, among which soil cadmium (Cd) contamination severely threatens safe production. Therefore, identifying wheat varieties with low Cd accumulation is essential for ensuring safe wheat cultivation in Cd contaminated farmlands. In this study, 30 wheat varieties (lines) from the Huang–Huai wheat growing region were evaluated. A soil culture experiment was conducted using three Cd concentration levels (0 mg/L, 2.5 mg/L, and 5 mg/L) to assess Cd accumulation capacity and to explore the relationship between root growth traits and Cd accumulation under Cd stress. The results were as follows: (1) Five low Cd accumulating varieties were identified: ‘Xinong 889’, ‘Xinmai 36’, ‘Zhoumai 36’, ‘Yumai 51’, and ‘Huaimai 18’. (2) Cd stress significantly inhibited wheat seedling growth but had a relatively limited effect on organic matter accumulation. Most Cd accumulated in seedling roots, and significant differences were observed among varieties. (3) Cd stress caused stronger inhibition of root growth in high Cd accumulating varieties, whereas inhibition was weaker in low Cd accumulating varieties. These findings clarify the relationship between root morphology and Cd accumulation in wheat seedlings and provide a scientific basis for wheat variety selection and safe production in Cd contaminated areas of the Huang–Huai region. |
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