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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
General strategy for optogenetic systems in plants. In dark, the system is turned off, the target gene does not express. Upon illumination with the light of a certain wavelength, the optogenetic system is activated, resulting in the transcription of the target gene.