Microalgae-augmented cadmium accumulation in Perilla frutescens: an integrated plant-microbe strategy for enhanced
Ying Ren1, Yuying Su1, Jinfeng Li1
1Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100193, China.
Plant physiology and biochemistry : PPB
|January 23, 2026
まとめ
Integrating microalgae with Perilla frutescens enhances cadmium phytoremediation, improving plant growth and soil health. This sustainable approach effectively reduces soil cadmium levels and boosts plant cadmium accumulation.
科学分野:
- Environmental Science; Biotechnology; Agronomy
背景:
- Cadmium (Cd) contamination poses significant risks to agricultural productivity and ecosystems.; Phytoremediation using plants is a sustainable strategy, but plant stress can limit its effectiveness.; Developing integrated systems to enhance phytoremediation efficiency under cadmium stress is crucial.
研究 の 目的:
- To develop and evaluate a microalgae-Perilla frutescens remediation system for cadmium-contaminated soils.; To assess the system's performance under varying cadmium stress levels (low and high).; To elucidate the underlying physiological and molecular mechanisms of enhanced phytoremediation.
主な方法:
- Established a co-culture system of microalgae and Perilla frutescens.; Exposed the system to low (50 mg/kg) and high (150 mg/kg) cadmium concentrations.; Quantified cadmium accumulation in plants and soil, measured plant growth and photosynthesis, and analyzed gene expression related to stress response and metal transport.
主要な成果:
- Microalgae co-treatment significantly increased cadmium accumulation in Perilla frutescens tissues (roots, stems, leaves) under both low and high Cd stress.; The integrated system effectively reduced soil cadmium levels and alleviated Cd-induced growth inhibition and photosynthetic impairment.; Distinct molecular responses were observed: low Cd stress involved enhanced antioxidant enzyme activities and upregulation of ROS, jasmonic acid, and metal transport genes; high Cd stress shifted towards homeostasis maintenance and metabolic reprogramming.
結論:
- Microalgae integration substantially enhances the phytoremediation capacity of Perilla frutescens for cadmium-contaminated soils.; The system demonstrates improved plant stress tolerance, detoxification, and soil nutrient enrichment (nitrogen and phosphorus).; This microalgae-plant remediation strategy offers a scalable and sustainable solution for managing cadmium pollution in agricultural lands.
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