期刊
ADVANCED SCIENCE
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1002/advs.202305552
关键词
chlorophyll content monitoring; plant wearable sensors; reflectance-based measurements; smart agriculture
Plant wearable sensors enable real-time monitoring of plant chlorophyll content, providing valuable information on plant physiological status. A miniaturized and wearable chlorophyll meter is developed for rapid, non-destructive, and in situ chlorophyll monitoring, and can wirelessly communicate with a smartphone.
Plant wearable sensors facilitate the real-time monitoring of plant physiological status. In situ monitoring of the plant chlorophyll content over days can provide valuable information on the photosynthetic capacity, nitrogen content, and general plant health. However, it cannot be achieved by current chlorophyll measuring methods. Here, a miniaturized and plant-wearable chlorophyll meter for rapid, non-destructive, in situ, and long-term chlorophyll monitoring is developed. The reflectance-based chlorophyll sensor with 1.5 mm thickness and 0.2 g weight (1000 times lighter than the commercial chlorophyll meter), includes a light emitting diode (LED) and two symmetric photodetectors (PDs) on a flexible substrate, and is patched onto the leaf upper epidermis with a conformal light guiding layer. A chlorophyll content index (CCI) calculated based on the sensor shows a better linear relationship with the leaf chlorophyll content (r(2) > 0.9) than the traditional chlorophyll meter. This meter can wirelessly communicate with a smartphone to monitor the leaf chlorophyll change under various stresses and indicate the unhealthy status of plants for long-term application of plants under various stresses earlier than chlorophyll meter and naked-eye observation. This wearable chlorophyll sensing patch is promising in smart and precision agriculture.
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