| 詹文雨,王海娟,王宏镔.镉胁迫下不同镉富集能力叶菜类蔬菜的品质比较[J].农业环境科学学报,2026,45(1):50-60. |
| 镉胁迫下不同镉富集能力叶菜类蔬菜的品质比较 |
| Quality comparison of leafy vegetables with different cadmium-accumulating abilities under cadmium stress |
| 投稿时间：2025-01-19 |
| DOI：10.11654/jaes.2025-0066 |
| 中文关键词: 叶菜类蔬菜 镉 抗氧化物质 可溶性蛋白 总游离氨基酸 |
| 英文关键词: leafy vegetables cadmium（Cd） antioxidative substances soluble protein total free amino acid |
| 基金项目:国家自然科学基金项目（31960264） |
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| 摘要点击次数: 615 |
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| 中文摘要: |
| 为探究镉（Cd）胁迫下不同Cd富集能力叶菜类蔬菜的品质，采用室内盆栽试验方法，研究了土壤不同Cd含量[0（CK）、0.5、2.0、5.0、10 mg·kg-1]处理下，低Cd富集茼蒿和高Cd富集菠菜对Cd的富集特征以及叶片光合色素、可溶性糖、抗氧化类物质、可溶性蛋白和总游离氨基酸的变化。结果表明：随着土壤Cd含量的增加，2种蔬菜体内的Cd含量显著增加，菠菜对Cd的富集能力显著高于茼蒿，在土壤Cd 2.0 mg·kg-1处理下，茼蒿地上部Cd含量（[0.19±0.01）mg·kg-1]满足食品安全国家标准。2种蔬菜不同部位对Cd的富集能力存在显著差异，茼蒿表现为根>茎>叶，菠菜为叶>根>茎。土壤Cd 0.5 mg·kg-1处理下，2种蔬菜的光合色素含量均比CK显著增加，但Cd 10 mg·kg-1处理时，茼蒿的叶绿素a、类胡萝卜素、可溶性糖和总叶绿素含量显著下降，降幅为16.95%~71.97%，菠菜则与CK无显著差异。Cd 10 mg·kg-1处理时，2种蔬菜的总黄酮、总游离氨基酸和可溶性蛋白含量均显著下降，但在Cd 0.5~5.0 mg·kg-1处理时，茼蒿的可溶性糖、维生素C、总黄酮、总游离氨基酸和可溶性蛋白含量与CK持平或显著增加，菠菜的总黄酮在Cd 2.0 mg·kg-1和5.0 mg·kg-1处理时则出现显著下降（18.59%和33.32%）。研究表明，高含量Cd胁迫能显著降低低Cd富集茼蒿的品质，为保持其品质不受影响，土壤Cd含量必须控制在2.0 mg·kg-1以下。 |
| 英文摘要: |
| In order to investigate the quality of leafy vegetables with different cadmium（Cd）accumulation abilities under Cd stress, a pot experiment was carried out to study the characteristics of Cd accumulation in low-Cd-accumulating Glebionis coronaria（L.）Cass. ex Spach and high-Cd-accumulating Spinacia oleracea L., as well as the changes of photosynthetic pigments, soluble sugars, antioxidative substances, soluble proteins and total free amino acids in the leaves under different soil Cd concentrations[0（CK）, 0.5, 2.0, 5.0, 10 mg· kg-1]. The results showed that the Cd content in two vegetables significantly increased with the increment in soil Cd concentration, and S. oleracea exhibited a higher Cd accumulation capacity than G. coronaria. Under the soil Cd treatment of 2.0 mg·kg-1, the Cd content [ （0.19± 0.01）mg·kg-1] in the aboveground part of G. coronaria met the national food safety standards. Significant differences in Cd accumulation were observed among different parts of the two vegetables. G. coronaria showed the pattern of root > stem > leaf, while S. oleracea showed the pattern of leaf > root > stem. Under the soil Cd treatment of 0.5 mg·kg-1, the contents of photosynthetic pigments in both vegetables were significantly higher than those in the CK. However, under the soil Cd treatment of 10 mg · kg-1, the contents of chlorophyll a, carotenoids, soluble sugar and total chlorophylls in G. coronaria decreased significantly with a reduction range of 16.95%-71.97%, while S. oleracea showed no significant difference from the CK. Under the soil Cd treatment of 10 mg·kg-1, the contents of total flavonoids, total free amino acids and soluble protein in the two vegetables significantly decreased, but the contents of soluble sugar, vitamin C, total flavonoids, total free amino acids and soluble proteins in G. coronaria were the same as or significantly higher than those in the CK under soil Cd the treatments of 0.5-5.0 mg·kg-1. The contents of total flavonoids in S. oleracea significantly decreased by 18.59% and 33.32% under the soil Cd treatments of 2.0 mg·kg-1 and 5.0 mg·kg-1, respectively. Therefore, high concentration Cd stress can significantly reduce the quality of low-Cd-accumulating G. coronaria. To maintain its quality of G. coronaria, the soil Cd concentration must be controlled within 2.0 mg·kg-1 under the experimental conditions. |
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