Abstract
Ethylene plays a pivotal role in the climacteric fruit ripening and senescence process. The effect of three ethylene inhibitors on the yield, quality, and storability of ‘Canino’ apricot fruit was studied. Foliar sprays of distilled water (control), aminoethoxyvinylglycine (AVG) (150 and 100 mg·L−1), salicylic acid (SA) (4 and 2 mM), and chitosan (2.5% and 1.5%) were applied 30 and 15 days before harvest. Results indicated that the high concentrations of AVG and SA recorded the lowest percentage of preharvest fruit drop and, hence, the highest yield. Trees receiving either concentration of AVG showed the highest fruit firmness. High concentrations of all three ethylene inhibitors reduced fruit weight loss, total carotenoids, and soluble solid content (SSC), but increased total acidity (TA) during cold storage (2 °C). A high score of overall taste acceptability was observed with a higher concentration of SA, which was also recorded the lowest fruit malondialdehyde content (MDA) at harvest and during storage. The highest concentrations of SA and chitosan recorded no decay for 28 days of storage. Gene expression analysis reflected higher expression of PaACS1 gene with the highest concentrations of ethylene inhibitors, suggesting that SA (4 mM) is recommended for optimal yield, quality, and storability of ‘Canino’ apricot fruit grown under Egyptian conditions.
Highlights
Domesticated in China, apricot, Prunus armeniaca L., a member of the Rosaceae family, is one of the most widely distributed deciduous fruit trees in the world that produce highly nutritional fruit [1,2]
We carried out an investigation that revealed that the foliar spray of ethylene inhibitors such as AVG, salicylic acid (SA), and chitosan reduced the percentage of Preharvest fruit drop (PFD) compared to the control, with the highest yield recorded for both AVG and SA
The effect of AVG on fruit firmness was more pronounced in comparison to SA and chitosan
Summary
Domesticated in China, apricot, Prunus armeniaca L., a member of the Rosaceae family, is one of the most widely distributed deciduous fruit trees in the world that produce highly nutritional fruit [1,2]. The aim of this research was to improve fruit yield, quality, shelf life and marketability through an evaluation of the effect of preharvest foliar application of some ethylene inhibitoIrns t(hee.gE.,gAypVtiGan, SmAa,rkaentd, ‘Cchaintoinsoa’na)pornicoftruisitcochnasirdaecrteedritshtiecslaatetsht-amrvateusrtinagndapdriucroitng cold stforuraitgwe.ith high remunerative value [5]. It produces larger fruit than other cultivars; the fruit are very susceptible to chilling injuries and have limited shelf life [5]. Chitosan-coated mango fruit have shown a reduction in WL due to the covered stomata on fruit peel that led to reduced rates of transpiration and respiration [66]
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