Dual-Electrode Wearable Biosensors for In-Field MicroRNA Analysis in Living Plants.
Liu X, Zhao J, Xue Y, Bing Y, Ge L
Plant Signaling
Imagine knowing your tomato plants are stressed by salt buildup days before the leaves start wilting — this sensor technology brings that kind of early-warning system one step closer to the garden.
Plants use tiny molecular switches called microRNAs to control how they respond to stress like drought or salty soil, but these molecules are extremely hard to detect outside a laboratory. Researchers created a small, flexible chip that sticks to a plant like a bandage and measures these molecules directly on the plant, in the field. They tested it on tomatoes and could detect stress signals at incredibly low levels — far earlier than visible symptoms appear.
Key Findings
The wearable chip detected plant microRNAs at concentrations as low as 3.2 femtomolar — an extraordinarily sensitive threshold that eliminates the need for sample preparation or lab enrichment.
The device uses two specialized electrodes: one draws molecular targets out of plant fluid, and a gold nanoparticle-coated graphene electrode reads the electrochemical signal reliably.
The chip successfully monitored microRNA expression in living tomato plants under both drought and salt stress conditions without harming or detaching from the plant.
chevron_right Technical Summary
Scientists built a flexible, wearable sensor that can be attached to living plants to detect tiny regulatory molecules called microRNAs directly in the field — no lab needed. The device successfully monitored tomato stress responses to drought and salt in real time.
Abstract Preview
MicroRNAs (miRNAs) are pivotal regulators of plant growth and stress response. The development of plant wearable miRNA-specific sensors holds significant potential to unveil new insights into plant...
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