How much do plants get stressed? A new microsensor allows measuring it without altering them further.

Researchers have developed a portable microsensor that measures oxidative stress in plants without causing damage. This device monitors hydrogen peroxide levels, which indicate plant stress, in real-time. The innovation aims to assist farmers in adapting to climate change impacts on crops. The sensor uses graphene-based micro-needles to access leaf fluids, providing continuous data without invasive sampling. Experts highlight the importance of measuring hydrogen peroxide as a health indicator, although some express concerns about the sensor's specificity and current limitations to certain plant types. Future testing on various species is planned to enhance its application in precision agriculture.