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Updated: Jan 19, 2026
Photoreceptors and Plant Responses to Light
Biological Kerker Effect Boosts Light Collection Efficiency in Plants.
Hani Barhom, Andrey A Machnev, Roman E Noskov
1Research Institute of Influenza , Ministry of Healthcare of the Russian Federation , Prof. Popova str. 15/17 , St. Petersburg 197376 , Russia.
Alpine plants use calcium carbonate nanoparticles to enhance light collection for photosynthesis. These vaterite nanospherulites exhibit directional light scattering via the Kerker effect, improving efficiency.
Area of Science:
- Biomaterials Science
- Optics
- Plant Biology
Background:
- Vaterite and calcite, polymorphs of calcium carbonate (CaCO3), are recognized for their potential in drug delivery and tissue engineering.
- These minerals are crucial biogenic components in nature, often forming self-assembled polycrystal micro- and nanoparticles (spherulites).
- Alpine plants, specifically the Saxifraga genus, have been observed to produce CaCO3 nanoparticles on leaf margins.
Purpose of the Study:
- To investigate how Saxifraga plants utilize CaCO3 polycrystal nanoparticles for improved light collection efficiency.
- To elucidate the optical properties of synthesized vaterite nanospherulites and the underlying physical mechanisms.
- To explore the application of the Kerker effect in bioinspired light-harvesting strategies.
Main Methods:
- Artificial synthesis of vaterite nanospherulites.
- Dark-field spectroscopy measurements to analyze optical properties.
- Comprehensive numerical analysis to model particle microstructure and light scattering.
- Ex vivo studies of leaf microstructure and optical properties of Saxifraga plants.
Main Results:
- Demonstration of directional light scattering from synthesized vaterite nanospherulites.
- Observation of the generalized Kerker condition, where higher-order multipoles interfere constructively in the forward direction.
- Highly directive forward light scattering from vaterite nanospherulites across the visible spectrum.
- Confirmation of the Kerker effect's importance in alpine Saxifraga species for light collection.
Conclusions:
- Saxifraga plants employ CaCO3 nanoparticles to tailor light scattering channels and enhance light collection efficiency.
- The observed phenomenon is governed by the Kerker effect, enabling constructive interference of multipoles for forward scattering.
- This research offers a bioinspired strategy for designing efficient light-harvesting systems using self-assembled CaCO3 nanoparticles.