Improving the preharvest application of resveratrol and 6-benzylaminopurine technique to reduce postharvest fruit softness in cherimoya
Application of a mixed solution of 1.6 mM resveratrol (RVS) and 6-benzyl-aminopurine (BAP) at 8 or 15 days before harvest, successfully reduced fruit and peel softness, fruit weight loss, as well as peel color loss in cherimoya (Annona cherimolla) cultivars Fino de Jete and Ruth. In the present work, we applied the same RVS-BAP treatment to the full fruit of six Bays cherimoya trees, 8 days before the first harvest; as control, the full fruit of other six Bays cherimoya trees were sprayed with tap water. According to the harvest index, we harvested at 8, 15 and 30 days after spraying (DAS). RVS-BAP treated fruits harvested 15 DAS had 3 more days of shelf life (15 days) than the fruit of the other five treatments. It was noted that fruits harvested 8 and 15 DAS increased its firmness around 30% in relation to control; whereas those fruits harvested 30 DAS increased 100% its firmness compared to control. During postharvest storage, all the RVS-BAP treated fruits presented higher firmness than the non-treated cherimoya fruit. There was no difference between RVS-BAP treated or non-treated fruit, in the same harvest date, for fruit weight and peel color. These results suggest that one application of RVS-BAP in all the fruit of the cherimoya tree might be performed, preferentially at least 15 days before the first harvest.
Salomon-Castaño, J., Franco-Mora, O., Morales, A.A., Castañeda-Vildózola, A., Villarreal-Fuentes, J.M. and Sánchez-Pale, J.R. (2020). Improving the preharvest application of resveratrol and 6-benzylaminopurine technique to reduce postharvest fruit softness in cherimoya. Acta Hortic. 1278, 77-82
Annona cherimolla, fruit firmness, peel color, stilbene, cytokine