Plant Molecular Biology

, Volume 91, Issue 1–2, pp 97–114 | Cite as

The peach HECATE3-like gene FLESHY plays a double role during fruit development

  • Alessandro Botton
  • Angela Rasori
  • Fiorenza Ziliotto
  • Annick Moing
  • Mickaël Maucourt
  • Stéphane Bernillon
  • Catherine Deborde
  • Anna Petterle
  • Serena Varotto
  • Claudio Bonghi
Article

Abstract

Tight control of cell/tissue identity is essential for a correct and functional organ patterning, an important component of overall fruit development and eventual maturation and ripening. Despite many investigations regarding the molecular determinants of cell identity in fruits of different species, a useful model able to depict the regulatory networks governing this relevant part of fruit development is still missing. Here we described the peach fruit as a system to link the phenotype of a slow ripening (SR) selection to an altered transcriptional regulation of genes involved in determination of mesocarp cell identity providing insight toward molecular regulation of fruit tissue formation. Morpho-anatomical observations and metabolomics analyses performed during fruit development on the reference cultivar Fantasia, compared to SR, revealed that the mesocarp of SR maintained typical immaturity traits (e.g. small cell size, high amino acid contents and reduced sucrose) throughout development, along with a strong alteration of phenylpropanoid contents, resulting in accumulation of phenylalanine and lignin. These findings suggest that the SR mesocarp is phenotypically similar to a lignifying endocarp. To test this hypothesis, the expression of genes putatively involved in determination of drupe tissues identity was assessed. Among these, the peach HEC3-like gene FLESHY showed a strongly altered expression profile consistent with pit hardening and fruit ripening, generated at a post-transcriptional level. A double function for FLESHY in channelling the phenylpropanoid pathway to either lignin or flavour/aroma is suggested, along with its possible role in triggering auxin-ethylene cross talk at the start of ripening.

Keywords

Fruit patterning Mesocarp identity Metabolomics MicroRNA Phenylpropanoid pathway Post-transcriptional regulation 

Notes

Acknowledgments

This article is dedicated to the memory of our friend and colleague Angelo Ramina. We thank Daniel Jacob for developing and maintaining MeRy-B knowledge base and database. This research was financially supported by Project ex60 % (2013 and 2014) funded by the University of Padova.

Authors’ contributions

Claudio Bonghi conceived the study. Angela Rasori and Fiorenza Ziliotto made the molecular analyses, while Anna Petterle performed the histochemical assessments and microscopic analyses. Annick Moing, Stéphane Bernillon, Catherine Deborde and Mickaël Maucourt supervised and carried out the metabolomic analyses together with Angela Rasori and performed the related data mining. Alessandro Botton carried out the bioinformatic and statistical analyses and prepared the graphics. Serena Varotto gave useful advices and contributed to experiments. Claudio Bonghi and Alessandro Botton interpreted the results and wrote the paper.

Supplementary material

11103_2016_445_MOESM1_ESM.pdf (6.7 mb)
Supplementary material 1 (PDF 6835 kb)
11103_2016_445_MOESM2_ESM.pdf (259 kb)
Supplementary material 2 (PDF 259 kb)
11103_2016_445_MOESM3_ESM.pdf (121 kb)
Supplementary material 3 (PDF 120 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Alessandro Botton
    • 1
  • Angela Rasori
    • 1
  • Fiorenza Ziliotto
    • 1
  • Annick Moing
    • 2
    • 3
  • Mickaël Maucourt
    • 3
    • 4
  • Stéphane Bernillon
    • 2
    • 3
  • Catherine Deborde
    • 2
    • 3
  • Anna Petterle
    • 1
  • Serena Varotto
    • 1
  • Claudio Bonghi
    • 1
  1. 1.Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE)University of PadovaLegnaroItaly
  2. 2.UMR1332 Biologie du Fruit et PathologieINRAVillenave d’OrnonFrance
  3. 3.Plateforme Métabolome du Centre de Génomique Fonctionnelle Bordeaux, MetaboHUB, IBVMCentre INRA BordeauxVillenave d’OrnonFrance
  4. 4.UMR1332 Biologie du Fruit et PathologieUniversity of BordeauxVillenave d’OrnonFrance

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