Endogenous RNA editing of a nuclear gene BOSS triggers flowering in tomato
Wang, W.; Ye, J.; Yu, C.; Xie, Q.; Wang, X.; Yu, H.; Song, J.; Li, C.; Cui, L.; Han, H.; Yang, C.; Li, H.; Lu, Y.; Wang, T.; Zhang, Y.; Zhang, J.; Ouyang, B.; Ye, Z.
Show abstract
RNA editing is defined as the production of transcripts with RNA sequences different from those of the DNA template. Most of previous RNA editing studies have focused on organelles, while RNA editing of nuclear transcripts is largely unknown. Here, we describe the first example of nuclear transcript RNA editing in plant, the BOSS RNA editing regulates tomato flowering. The SNP (SNP1) located in the 5UTR of BOSS gene (the Balancer of SP and SFT) is associated with tomato early flowering, and two transcripts of BOSS produced by SNP1 associated RNA editing show functional differentiation, where BOSS-{beta} transcript promotes flowering while BOSS- does not. Furthermore, these two transcripts of BOSS are shown to regulate SP (anti-florigen) pathway at transcription level in the shoot apical meristem (SAM). Our findings reveal a new layer of complexity in the control of plant stem cell proliferation and provide the evidence of RNA-editing of a single gene for flowering, suggesting that molecular breeding programs to increase the RNA-editing efficiency may improve the productivity of tomatoes and other agricultural organisms.
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