Effects of Potassium Fertilization for Pineapple on Internal Browning of Fruit in Post-Harvest Conservation

Coulibaly Souleymane*, Yapo Sopie Edwige-Salomé, N’cho Achi Laurent, Kouadio Oi Kouadio Samuel and Kouakou Tanoh Hilaire
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Coulibaly Souleymane*: Université Nangui Abrogoua, UFR Sciences de la Nature, 02 BP 801 Abidjan 02, Côte d’Ivoire
Yapo Sopie Edwige-Salomé: Université Jean Lorougnon Guédé, UFR Agroforesterie, BP 150 Daloa, Côte d’Ivoire
N’cho Achi Laurent: Université Nangui Abrogoua, UFR Sciences de la Nature, 02 BP 801 Abidjan 02, Côte d’Ivoire
Kouadio Oi Kouadio Samuel: Université Peleforo Gon Coulibaly, UFR Sciences Biologiques, BP 1328 Korhogo, Côte d’Ivoire
Kouakou Tanoh Hilaire: Université Nangui Abrogoua, UFR des Sciences de la Nature, 02 BP 801 Abidjan 02, Côte d’Ivoire

Journal of Agriculture and Crops, 2019, vol. 5, issue 6, 100-108

Abstract: Resistance to internal browning of pineapple fruits depends on several factors such as the cultural techniques through mineral fertilization. The objective of this work is to study the effects of the potassium fertilization for pineapple on internal browning of fruit in post-harvest conservation. The experiments have been carried out on the site of the University Nangui Abrogoua (Abidjan, Côte d’Ivoire) of July 2015 to the end of October 2016. Potassium has been applied according to four modalities of treatments (T0; T1; T2 and T3) made in 2nd, 4, 6 and 7th months (respectively) after plantation. The incidence of internal browning (IB), the phenolic content, sugars and ascorbic acid have been determined after post-harvest conservation of fruit. The activity of phenolic biosynthesis enzymes (PAL and TAL) and oxidation enzymes (PPO and POD) were evaluated. The results showed that BI intensity in pineapple fruit decreases with the potassium amount applied in field. This IB drop was correlated with the content of reducing sugars, total phenols, activity of PAL and the PPO. No symptom of IB was observed on pineapple fruits under treatment T2 (34 g of K2O/plant). Potassium has a depressive effect on phenolic biosynthesis. In effect, it inhibits the IB in the both varieties of pineapple studied that are Smooth Cayenne and MD2.

Keywords: Internal browning; Pineapple; Post-harvest conservation; Potassium; Smooth cayenne; MD2 (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:arp:jacarp:2019:p:100-108

DOI: 10.32861/jac.56.100.108

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