Genetic and molecular mechanisms underlying the parthenocarpic fruit mutation in tomato.

Autor:	Picarella ME; Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy., Ruiu F; Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy., Selleri L; Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy., Presa S; Departamento de Biotecnología de Cultivos, Instituto de Biología Molecular y Celular de Plantas (IBMCP), Consejo Superior de Investigaciones Científicas (CSIC) - Universitat Politécnica de Valéncia (UPV), Valencia, Spain., Mizzotti C; Dipartimento di Bioscienze (DBS), Università degli Studi di Milano, Milano, Italy., Masiero S; Dipartimento di Bioscienze (DBS), Università degli Studi di Milano, Milano, Italy., Colombo L; Dipartimento di Bioscienze (DBS), Università degli Studi di Milano, Milano, Italy., Soressi GP; Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy., Granell A; Departamento de Biotecnología de Cultivos, Instituto de Biología Molecular y Celular de Plantas (IBMCP), Consejo Superior de Investigaciones Científicas (CSIC) - Universitat Politécnica de Valéncia (UPV), Valencia, Spain., Mazzucato A; Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2024 Mar 27; Vol. 15, pp. 1329949. Date of Electronic Publication: 2024 Mar 27 (Print Publication: 2024).
DOI:	10.3389/fpls.2024.1329949
Abstrakt:	Parthenocarpy allows fruit set independently of fertilization. In parthenocarpic-prone tomato genotypes, fruit set can be achieved under pollen-limiting environmental conditions and in sterile mutants. Parthenocarpy is also regarded as a quality-related trait, when seedlessness is associated with positive fruit quality aspects. Among the different sources of genetic parthenocarpy described in tomato, the parthenocarpic fruit ( pat ) mutation is of particular interest because of its strong expressivity, high fruit set, and enhanced fruit quality. The complexity of the pat "syndrome" associates a strong competence for parthenocarpy with a complex floral phenotype involving stamen and ovule developmental aberrations. To understand the genetic basis of the phenotype, we mapped the pat locus within a 0.19-cM window of Chr3, comprising nine coding loci. A non-tolerated missense mutation found in the 14 th exon of Solyc03g120910 , the tomato ortholog of the Arabidopsis HD-Zip III transcription factor HB15 ( SlHB15 ), cosegregated with the pat phenotype. The role of SlHB15 in tomato reproductive development was supported by its expression in developing ovules. The link between pat and SlHB15 was validated by complementation and knock out experiments by co-suppression and CRISPR/Cas9 approaches. Comparing the phenotypes of pat and those of Arabidopsis HB15 mutants, we argued that the gene plays similar functions in species with fleshy and dry fruits, supporting a conserved mechanism of fruit set regulation in plants. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2024 Picarella, Ruiu, Selleri, Presa, Mizzotti, Masiero, Colombo, Soressi, Granell and Mazzucato.)
Databáze:	MEDLINE
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