Global Environmental Pollution Problems

Cadmium (Cd) is a major cause of soil contamination in farmlands. To improve the phytoremediation ability of hyperaccumulators, the straws of three Solanum spp. (Solanum alatum, Solanum nigrum var. humile, and Solanum nigrum) were added to Cd‐contaminated soil, and Cd‐hyperaccumualtor Galinsoga parviflora were planted in the soil to explore their effect on phytoremediation ability of G. parviflora. The straws of three Solanum spp. increased the biomass of G. parviflora, but had no significant effects on the photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoid) contents in G. parviflora. The straws of three Solanum spp. decreased or had no significant effects on the superoxide dismutase activity and soluble protein content of G. parviflora, however, they enhanced the catalase activity of this plant. The straw of S. nigrum var. humile enhanced the peroxidase activity of G. parviflora, whereas the straws of S. alatum and S. nigrum decreased the peroxidase activity of G. parviflora. The straws of three Solanum spp. increased the Cd content in shoots and the Cd extraction by shoots of G. parviflora. Compared with the control, the straws of S. alatum, S. nigrum var. humile, and S. nigrum increased the Cd extraction by shoots by 46.41%, 35.33%, and 41.20%, respectively. Correlation and gray relational analyses revealed that the root biomass, shoot biomass, and catalase activity were closely associated with the Cd extration by shoots of G. parviflora. These results indicate that the straws of three Solanum spp. can promote the growth and Cd uptake of G. parviflora, thus improving its phytoremediation ability.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Solanum spp. straw improves phytoremediation ability of hyperaccumulator Galinsoga parviflora on cadmium‐contaminated soil

Dai

Chen

Wang

et al. 2022

“…Societal development has resulted in increased contamination of soils by heavy metals, especially cadmium (Cd) 1,2 . When the Cd concentration in the soil reaches a certain level, the excessive Cd can damage plants, but it can also enter the food chain following the absorption by crops, ultimately leading to harmful effects on human health 3,4 . Thus, effective methods for remediating Cd‐contaminated soil are urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Effects of mulching with Solanum spp. straw on phosphorus, iron, and cadmium uptake by rice plants

Shi¹,

et al. 2022

The cadmium (Cd) contaminated paddy soil has seriously affected the safe production of rice, and returning straw to fields changes the Cd accumulation in crops.To decrease the Cd accumulation in rice and clarify the relationships among phosphorus (P), iron, and Cd contents in rice, the effects of Solanum spp. (including non-hyperaccumulators Solanum diphyllum and Solanum alatum, and Cd-hyperaccumulators Solanum nigrum and Solanum photeinocarpum) straws on the P, iron, and Cd uptakes in rice in Cd-contaminated soil were investigated. The application of four Solanum spp. straws increased the biomass of rice. Only the S. alatum straw increased the chlorophyll a, chlorophyll b, total chlorophyll, and carotenoid contents in rice. Regarding the P, iron, and Cd contents in rice, the four Solanum spp. straws either

Effects of tea application on cadmium, phosphorus, and iron accumulations in rice (Oryza sativa L.) seedlings

Shi,

Hu,

et al. 2023

To decrease the cadmium (Cd) uptake in rice and study the relationships of phosphorus (P), iron (Fe), and Cd uptakes in rice, the effects of four different tea types (green, black, dark, and white teas) on the P, Fe, and Cd accumulation in rice seedlings were studied. The results showed that only the black and dark teas increased the biomass of rice seedlings. The application of green, black, dark, and white teas increased the photosynthetic pigment content to some extent. Only the black tea increased the shoot P content, and the black, dark, and white teas increased the shoot Fe content. Compared with the control, only the black and dark teas decreased the shoot Cd content by 9.51% and 25.02%. Correlation and gray relational analyses showed that the root Cd content, soil pH value and soil exchangeable Cd concentration were the most closely associated with the shoot Cd content. The principal component and cluster analyses also showed the top three close cluster categories with shoot Cd content were root Cd content, soil exchangeable Cd concentration, and soil pH value. These findings indicate that the application of black and dark teas can promote the growth and decrease the Cd uptake of rice.