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Transcriptome Analysis Identifies Downstream Genes of ICLAVATA3/I in Tomato

Horticulturae, 2023-12, Vol.10 (1) [Peer Reviewed Journal]

COPYRIGHT 2023 MDPI AG ;ISSN: 2311-7524 ;EISSN: 2311-7524 ;DOI: 10.3390/horticulturae10010011

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  • Title:
    Transcriptome Analysis Identifies Downstream Genes of ICLAVATA3/I in Tomato
  • Author: Zhang, Yaofeng ; Sun, Huixian ; Tian, Linlin ; Miao, Yanxiu ; Hou, Leiping ; Sun, Meihua ; Qi, Mingfang ; Li, Tianlai
  • Subjects: Flowers
  • Is Part Of: Horticulturae, 2023-12, Vol.10 (1)
  • Description: Fruit locule number is an important agronomic trait that affects fruit appearance, quality, and yield. CLAVATA3 (SlCLV3) is a candidate gene of the fasciated (fas) locus that plays a role in controlling the number of flower organs and fruit locules in tomato. The SlCLV3 encoding signal peptide mainly acts by inhibiting the expression of WUSCHEL (WUS) but there is little research about how the receptor transmits the CLV3 signal to WUS and inhibits its expression. The CRISPR/Cas9 method was employed to edit the first exon of tomato SlCLV3 in this study, leading to the functional deletion of SlCLV3. As a result, flowers with a high number of organs and fruits with a high number of locules were produced. We screened six candidate genes using the transcriptome of clv3 mutants, analyzed expression variations in these genes between the cultivated allele and wild-type allele of fas, and showed that only SlLET6 and SlGIF1 (GRF1-interacting factor 1) were influenced by the fas locus. SlLET6 overexpression resulted in an increase in flower carpels and fruit locules. These results suggest that SlLET6 may be the downstream gene of SlCLV3 regulating the number of carpels and fruit locules in tomato.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 2311-7524
    EISSN: 2311-7524
    DOI: 10.3390/horticulturae10010011
  • Source: ProQuest Central
    DOAJ Directory of Open Access Journals
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