Comparison of cadmium accumulation in three Solanum species

Self Cite

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: 98%

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

Dai

Chen

Wang

et al. 2022

Self Cite

“…humile, Solanum americanum, and Solanum photeinocarpum have strong ability to accumulate Cd for remedying the Cd-contaminated soil. 25,26 So, in this study, Amygdalus persica seedlings were intercropped with three Solanum species (S. nigrum var. humile, S. americanum, and S. photeinocarpum), and grown in the Cd-contaminated soil, to investigate the effects of intercropping with Solanum species on the Cd and nutrient uptakes in A. persica.…”

Section: Introductionmentioning

confidence: 99%

“…The Cd‐hyperaccumulators Solanum nigrum var. humile , Solanum americanum , and Solanum photeinocarpum have strong ability to accumulate Cd for remedying the Cd‐contaminated soil 25,26 . So, in this study, Amygdalus persica seedlings were intercropped with three Solanum species ( S. nigrum var.…”

Section: Introductionmentioning

confidence: 99%

Intercropping with Solanum species decreases cadmium uptake and increases phosphorus and potassium uptakes in Amygdalus persica

Liu

et al. 2022

Intercropping with hyperaccumulators can decrease the cadmium (Cd) uptake in non‐hyperaccumulators, but there are few studies on fruit trees. To decrease the Cd uptake in fruit trees, three Cd‐hyperaccumulator Solanum species (Solanum nigrum var. humile, Solanum americanum, and Solanum photeinocarpum) were intercropped with Amygdalus persica seedlings, and the effects of intercropping with Solanum species on the Cd and nutrient uptakes in A. persica were studied. Intercropping with S. nigrum var. humile increased the biomass of A. persica, while intercropping with S. americanum and S. photeinocarpum decreased that. Intercropping with A. persica increased the biomass of three Solanum species. Intercropping promoted the phosphorus (P) and potassium (K) uptakes in both A. persica and Solanum species. For Cd uptake, intercropping reduced the Cd uptake in A. persica and enhanced the Cd uptake and extraction in Solanum species. Correlation analysis showed that the Cd and K had antagonistic effect in aboveground of A. persica. Therefore, A. persica intercropped with Solanum species can reduce the Cd uptake in A. persica and improve the phytoremediation abilities of Solanum species, which is suitable for the Cd‐contaminated peach orchard.

“…However, because of low biomass, the phytoremediation efficiency of soil Cd is low. 28 If exogenous GABA is applied on S. nigrum var. humile, its Cd-phytoremediation capacity could be improved.…”

mentioning

confidence: 99%

Exogenous γ‐aminobutyric acid (GABA) improves the cadmium phytoremediation capacity of Solanum nigrum var. humile under cadmium stress

Li,

Zhou

et al. 2024

Abstractγ‐aminobutyric acid (GABA) has shown promise in enhancing crop tolerance to heavy metal stress. To improve the cadmium (Cd) phytoremediation capacity of hyperaccumulator Solanum nigrum var. humile, the effects of exogenous GABA on the growth and Cd accumulation of S. nigrum var. humile were studied. When exposed to Cd stress (0.1 mg/L) through irrigation, S. nigrum var. humile exhibited inhibited growth, characterized by decreased biomass and contents of photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, and carotenoid). However, the application of exogenous GABA at 1 and 2 g/L increased various organs biomass and photosynthetic pigment content of S. nigrum var. humile to certain degree under Cd stress. Compared with the Cd treatment, the concentrations of 1 and 2 g/L GABA increased the shoot biomass by 8.24% and 16.62%, respectively. GABA also increased the Cd contents, bioconcentration factors, and Cd extractions in various organs of S. nigrum var. humile. Compared with the Cd treatment, the concentrations of 1 and 2 g/L GABA increased the shoot Cd extraction by 17.66% and 24.47%, respectively. Moreover, correlation and gray relational analyses showed that the shoot biomass, chlorophyll b content, and total chlorophyll content were the top three parameters closely related to shoot Cd extraction. These findings suggest that GABA can alleviate Cd‐induced stress in S. nigrum var. humile, thus enhancing its phytoremediation capacity for Cd‐contaminated soils.