Does dry matter partitioning to fruit in early- and late-ripening peach (Prunus persica) cultivars confirm the branch autonomy theory - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Journal of Horticultural Science and Biotechnology Année : 2006

Does dry matter partitioning to fruit in early- and late-ripening peach (Prunus persica) cultivars confirm the branch autonomy theory

Résumé

We studied dry matter partitioning to fruit by establishing different patterns of fruit distribution between and within main branch units (scaffolds) on early (cv. ‘Alexandra’) and late (cv. ‘Suncrest’) maturing cultivars of peach (Prunus persica L. Batsch). The desired fruit loads were obtained by differential thinning of scaffolds and the commercial crop-load per tree was maintained. Each tree had four main scaffolds, one of these scaffolds was lightly thinned (Highcrop scaffold), another one was heavily thinned (Low-crop scaffold) and the different fruit bearing stems (FBS) were alternately lightly thinned or heavily thinned in two scaffolds (Alternative-scaffold). Growth of fruits and of leafy shoots on all FBS were measured periodically from hand-thinning 30 and 50 days after full-bloom (DAFB) until harvest for cvs. ‘Alexandra’ and Suncrest, respectively.The mean fruit dry weight (DW) per FBS was strongly affected by fruit distribution between and within scaffolds in the late cv. ‘Suncrest’, indicating that branch autonomy was functional at the level of FBS in this case. In the early cv. ‘Alexandra’, mean fruit DW per FBS in each scaffold was similar, suggesting C-transfer between individual FBS. Branch autonomy could not be explained by fruit sink-strength being equal in both cultivars. In contrast to generative growth, vegetative growth was similar between scaffolds in both cultivars suggesting its independence from fruit sink removal.

Domaines

Horticulture
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Dates et versions

hal-02656733 , version 1 (29-05-2020)

Identifiants

  • HAL Id : hal-02656733 , version 1
  • PRODINRA : 18269

Citer

Eliane Nicolas, Francoise F. Lescourret, Michel M. Génard, Claude Bussi, Jacques Besset. Does dry matter partitioning to fruit in early- and late-ripening peach (Prunus persica) cultivars confirm the branch autonomy theory. Journal of Horticultural Science and Biotechnology, 2006, 81 (3), pp.444-448. ⟨hal-02656733⟩
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