Morphological Changes to Fruit Development Induced by GA3 Application in Sweet Cherry (Prunus avium L.)

Author:

Vignati Edoardo12ORCID,Caccamo Mario3ORCID,Dunwell Jim M.2ORCID,Simkin Andrew J.45ORCID

Affiliation:

1. Genetics, Genomics and Breeding, NIAB East Malling, New Road, Kent ME19 6BJ, UK

2. School of Agriculture, Policy and Development, University of Reading, Whiteknights, Reading RG6 6EU, UK

3. Crop Bioinformatics, NIAB, 93 Lawrence Weaver Road, Cambridge CB3 0LE, UK

4. School of Biosciences, University of Kent, Canterbury CT2 7NJ, UK

5. School of Life Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK

Abstract

Cherry (Prunus avium) fruits are important sources of vitamins, minerals, and nutrients in the human diet; however, they contain a large stone, making them inconvenient to eat ‘on the move’ and process. The exogenous application of gibberellic acid (GA3) can induce parthenocarpy in a variety of fruits during development. Here, we showed that the application of GA3 to sweet cherry unpollinated pistils acted as a trigger for fruit set and permitted the normal formation of fruit up to a period of twenty-eight days, indicating that gibberellins are involved in the activation of the cell cycle in the ovary wall cells, leading to fruit initiation. However, after this period, fruit development ceased and developing fruit began to be excised from the branch by 35 days post treatment. This work also showed that additional signals are required for the continued development of fully mature parthenocarpic fruit in sweet cherry.

Funder

Berry Gardens Growers Ltd.

Innovate UK, Growing Kent and Medway Programme

Publisher

MDPI AG

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