The invention belongs to the technical field of biotechnology and botany, relating to a method for modifying cell identity and regulating root nodule symbiosis, and specifically relating to the use of a new in-vivo plant mechanism formed on the basis of SHR-SCR in modifying the division potential of cortical cells. Also provided is a novel approach for identifying the traits of plants, thereby providing a feasible method for plant identification and an effective tool for plant breeding and screening.
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