|
| Quality comparison of leafy vegetables with different cadmium-accumulating abilities under cadmium stress |
| Received:January 19, 2025 |
| View Full Text View/Add Comment Download reader |
| KeyWord:leafy vegetables;cadmium（Cd）;antioxidative substances;soluble protein;total free amino acid |
| Author Name | Affiliation | E-mail | | ZHAN Wenyu | Faculty of Environmental Science and Engineering, Kunming University of Science and Technology/Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China | | | WANG Haijuan | Faculty of Environmental Science and Engineering, Kunming University of Science and Technology/Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China | | | WANG Hongbin | Faculty of Environmental Science and Engineering, Kunming University of Science and Technology/Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China | whb1974@126.com |
|
| Hits: 1019 |
| Download times: 660 |
| Abstract: |
| 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. |
|
|
|
