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Proposed working model for DHT1 influence on rice tillering through regulating D14 intron splicing. During the splicing of the pre-mRNA, DHT1 assembles with U1 snRNP and SR proteins to form a spliceosome to efficiently splice D14 intron for its effective translation, which can provide a sufficient amount of D14 protein for efficient SL signaling to induce the degradation of the SL signaling repressor D53 by the SCFD3-D14 E3 ubiquitin ligase complex, thus inhibiting rice tillering.
