Abstract
Fruit size has special importance for small-fruited early maturing cherry cultivars. In this study the effects of pre-harvest benzyladenine (BA) and BA plus gibberellin (GA) applications on fruit size and quality of ‘Noir de Guben’ sweet cherry (Prunus avium) were evaluated. ‘Noir de Guben’ trees were sprayed to run off with BA (50, 100 and 150 ppm) and BA + GA4+7 (12.5, 25, and 50 ppm) at straw-yellow color stage of the fruit. Fruit treated with BA (50, 100 and 150 ppm) and BA + GA4+7 (25 and 50 ppm) were significantly heavier and larger than the control. BA and BA + GA4+7 applications did not affect fruit firmness and fruit pH. 50 ppm BA-treated fruit had higher SSC (Soluble Solid Content) than control fruit. Excluding 25 ppm BA treatments, all treated fruit had higher acidity than the control fruit. BA and BA + GA4+7 applications delayed skin color development of the treated fruit. ‘Noir de Guben’ trees treated with the optimum concentrations of BA (150 ppm) and BA + GA4+7 (50 ppm) yielded fruit with 16.84 and 10.6 % greater weight, respectively.
Zusammenfassung
Der Fruchtgröße kommt bei kleinfrüchtigen, frühreifenden Süßkirschensorten eine besondere Bedeutung zu. Die Auswirkungen von Vorerntebehandlungen mit Benzyladenin (BA) sowie Benzyladenin plus Gibberelline (GA) auf die Fruchtgröße und Qualität der Süßkirschensorte ‘Noir de Guben’ wurden in dieser Studie untersucht. Die Bäume der Sorte ‘Noir de Guben’ wurden mit BA (50, 100 und 150 ppm) und BA + GA4+7 (12,5, 25 und 50 ppm) im hellgelben Farbstadium der Früchte tropfnass gespritzt. Die Früchte, die mit BA (50, 100 und 150 ppm) und BA + GA4+7 (25 und 50 ppm) behandelt wurden, waren schwerer und größer als die Früchte der Kontrolle. Die BA und BA + GA4+7 Behandlungen beeinflussten die Fruchtfleischfestigkeit und den pH-Wert des Fruchtsaftes nicht. Die mit 50 ppm BA behandelten Früchte hatten einen höheren Gehalt an löslicher Trockensubstanz als die Kontrollfrüchte. Die BA und BA + GA4+7 Behandlungen verzögerten die Fruchtausfärbung. Von den Bäumen, die mit der höchsten Konzentration von BA (150 ppm) und BA + GA4+7 (50 ppm) behandelt worden waren, konnten Früchte mit jeweils 16,84 bzw. 10,6 % höherem Gewicht geerntet werden.
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We thank Egirdir Horticultural Research Station, Isparta, Turkey for opening up their orchard and facilities to conduct this research.
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Canli, F., Pektas, M. & Ercisli, S. Benzyladenine and Gibberellin Applications Improve Fruit Weight and Delay Maturity of Sweet Cherry. Erwerbs-Obstbau 57, 71–75 (2015). https://doi.org/10.1007/s10341-015-0231-0
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DOI: https://doi.org/10.1007/s10341-015-0231-0