Optimization and mechanistic insights into silicon-doped ferrihydrite for simultaneous removal of arsenic and cadmium from contaminated water.

There are often a large number of heavy metal/metalloid ions in industrial wastewater, and arsenic (As) and cadmium (Cd) mixed pollution is a common combination. Ferrihydrite (Fh) is a naturally occurring adsorbent material. It has a strong adsorption effect on As, but it is not stable, and its adsorption effect on Cd is poor.

Silica nanoparticles outperform sodium silicate in enhancing trivalent chromium resistance in rice through their physicochemical impacts on root apoplastic barriers.

Excessive accumulation of heavy metals such as trivalent chromium [Cr(Ⅲ)] threatens environmental sustainability and crop health. While silicon fertilizers are known to mitigate Cr(III) toxicity in plants, and silica nanoparticles (SiO NPs) show promise for heavy metal stress alleviation, their comparative efficacy and underlying mechanisms remain unexplored. In this study, we compared the effects of SiO NPs and sodium silicate (NaSiO) in alleviating Cr(Ⅲ) stress in rice and elucidated the mechanisms behind.

Chemical and microbial mechanisms underpinning calcium-regulated suppression of cadmium bioavailability in alkaline paddy soil and cadmium accumulation in rice grain.

Lime is an effective amendment for reducing cadmium (Cd) bioavailability in acidic soils. However, the mechanisms underlying calcium (Ca)-Cd interactions during liming remain unclear. Here, the effects of different lime materials (CaO, Ca(OH), and CaCO) at three amendment levels (0.

Comparison of the effects of silicic acid, organosilicon and Nano-silicon on rice cell wall phosphorus.

Phosphorus is crucial for plant growth, but its deficiency is a global issue. can relieve plant phosphorus deficiency, yet the impacts and mechanisms of different silicon materials remain unclear. Here, we first showed a negative correlation between leaf silicon and cell wall phosphate among 14 rice varieties.

Convergent evidence for the temperature-dependent emergence of silicification in terrestrial plants.

Research on silicon (Si) biogeochemistry and its beneficial effects for plants has received significant attention over several decades, but the reasons for the emergence of high-Si plants remain unclear. Here, we combine experimentation, field studies and analysis of existing databases to test the role of temperature on the expression and emergence of silicification in terrestrial plants. We first show that Si is beneficial for rice under high temperature (40 °C), but harmful under low temperature (0 °C), whilst a 2 °C increase results in a 37% increase in leaf Si concentrations.

A novel layered culture device reveals spatial dynamics of root element uptake and optimal silicon application site for mitigating chromium uptake by rice.

Understanding root uptake mechanisms for various elements is crucial for optimizing heavy metal remediation strategies and enhancing plant-nutrient interactions. However, simple and effective methods to differentiate the contributions of specific root segments in element uptake are lacking. Here, we developed a layered culture device consisting of a culture box and a plant suspension mechanism, which isolates different root segments through solid media and waterproof coating.

Spatial variation in stability of wheat (Triticum aestivum L.) straw phytolith-occluded carbon in China.

Global climate warming, driven by human activities emitting greenhouse gases like CO, results in adverse effects, posing significant challenges to human health and food security. In response to this challenge, it is imperative to enhance long-term carbon sequestration, including phytolith-occluded carbon (PhytOC). Currently, there is a dearth of research on the assessment and distribution of the stability of PhytOC.

Unveiling mechanisms of silicon-mediated resistance to chromium stress in rice using a newly-developed hierarchical system.

Silicon (Si) has been well-known to enhance plant resistance to heavy-metal stress. However, the mechanisms by which silicon mitigates heavy-metal stress in plants are not clear. In particular, information regarding the role of Si in mediating resistance to heavy-metal stress at a single cell level is still lacking.

Silicon-phosphorus pathway mitigates heavy metal stress by buffering rhizosphere acidification.

Heavy metal pollution threatens food security, and rhizosphere acidification will increase the bioavailability of heavy metals. As a beneficial element in plants, silicon can relieve heavy metal stress. However, less attention has been paid to its effects on plant rhizosphere processes.

From promoting aggregation to enhancing obstruction: A negative feedback regulatory mechanism of alleviation of trivalent chromium toxicity by silicon in rice.

Trivalent chromium [Cr(III)] is a threat to the environment and crop production. Silicon (Si) has been shown to be effective in mitigating Cr(III) toxicity in rice. However, the mechanisms by which Si reduces Cr(III) uptake in rice are unclear.