Preharvest application of oxalic acid improves quality and phytochemical content of artichoke ( Cynara scolymus  L.) at harvest and during storage

Martínez‐Esplá, Alejandra; García-Pastor, María E.; Zapata, Pedro J.; Guillén, Fabián; Serrano, Marı́a; Valero, Daniel; Gironés-Vilaplana, Amadeo

doi:10.1016/j.foodchem.2017.03.051

Cited by 38 publications

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“…). Accordingly, MeJA treatments led to accumulation of anthocyanins and other polyphenol compounds in plums, black currants, mangos, apples, table grape, grapevine and wines and artichoke heads as well as in juice and flavedo of lemon fruits, as a result of enhanced phenylalanine ammonialyase (PAL) activity and increased expression of genes codifying enzymes involved in anthocyanin biosynthesis pathway . Then, MeJA treatments would lead to improved quality and health properties of pomegranate consumption, given the role of phenolics, including anthocyanins, and ascorbic acid in these properties …”

Section: Resultsmentioning

confidence: 99%

“…In addition, MeJA treatments applied as foliar spray during fruit development on tree, either in climacteric or non‐climacteric fruits, have been reported to increase phenolic and anthocyanin concentrations in table grapes, plums, black currants and apples as well as phenolic concentration in juice and flavedo of lemon fruits . Similar effects of preharvest MeJA treatments on increasing phenolic compound have been achieved on artichoke heads . Moreover, it is interesting to point our that MeJA has been classified as ‘generally recognized as safe’ (GRAS) substance by the US Food and Drug Administration (FDA) .…”

Section: Introductionmentioning

confidence: 85%

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Preharvest application of methyl jasmonate increases crop yield, fruit quality and bioactive compounds in pomegranate ‘Mollar de Elche’ at harvest and during postharvest storage

et al. 2019

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BACKGROUND: Previous reports have addressed the effectiveness of postharvest methyl jasmonate (MeJA) treatments on maintaining quality properties of pomegranate fruit during storage. However, there is no literature regarding the effects of preharvest MeJA treatments on pomegranate 'Mollar de Elche' crop yield, fruit ripening, quality attributes and bioactive compounds content (at harvest or after long-term storage), which were evaluated in this research. RESULTS: PreharvestMeJA treatments (1, 5, and 10 mmol L -1 ) increased pomegranate crop yield. MeJA at 1 and 5 mmol L -1 accelerated the on-tree ripening process, while it was delayed with 10 mmol L -1 . Losses in fruit weight, firmness and organic acids during storage at 10 ∘ C were delayed in MeJA treated fruit, leading to quality maintenance. In addition, MeJA treatments improved arils colour due to increased concentration of total and individual anthocyanins, at harvest and during storage. Total phenolic and ascorbic acid contents and total antioxidant activity [hydrophilic (H-TAA) and lipophilic (L-TAA) fractions] were also higher in arils from treated pomegranate fruits than in controls. CONCLUSION: Preharvest treatments with MeJA could be a promising tool to improve pomegranate crop yield, fruit quality and its content in bioactive compounds at harvest and during storage. The higher effects were obtained with MeJA at 5 mmol L -1 dose, which could be the selected treatment for practical application purposes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 85%

Preharvest application of methyl jasmonate increases crop yield, fruit quality and bioactive compounds in pomegranate ‘Mollar de Elche’ at harvest and during postharvest storage

et al. 2019

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“…Similarly, 2 mM OA applied with a mechanical mist sprayer at 63, 77, and 98 DAFB enhanced crop yield (kg per tree) and fruit weight of plum, although the on-tree ripening process was delayed [25]. However, no significant effect was found in the developmental process of artichoke plants sprayed with 2 mM OA solution at 45, 24, and 3 days before harvesting, although the treatment lead to a higher number of first-class artichokes with higher hydrophilic total antioxidant activity at harvest and during cold storage [23]. On the other hand, different OA concentrations (1, 3, and 5 mM) were applied on peach trees by preharvest spray at 15 days before harvest and results showed that OA, especially at 5 mM, enhanced fruit antioxidant capacity during storage [21].…”

Section: Introductionmentioning

confidence: 89%

“…As preharvest treatment, OA has been reported to increase yield and/or improve nutritional quality of sweet cherry [20], peach [21], kiwi [22], artichoke [23], strawberry [24], and plum [25], but its effect on pomegranate has not been investigated yet. Martínez-Esplá et al treated "Sweet Heart" and "Sweet Late" sweet cherry cultivars with OA at 0.5, 1.0, and 2.0 mM at 98, 112, and 126 days after full blossom (DAFB) by foliar spraying, and reported that fruit treated with 2 mM OA showed the higher fruit size and antioxidant potential at harvest [20].…”

Section: Introductionmentioning

confidence: 99%

Preharvest Application of Oxalic Acid Improved Pomegranate Fruit Yield, Quality, and Bioactive Compounds at Harvest in a Concentration-Dependent Manner

et al. 2020

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The effects of oxalic acid (OA) applied in preharvest on pomegranate crop yield and quality properties have not yet been investigated. Pomegranate trees were treated with OA at 1, 5, and 10 mM along the developmental growth cycle during 2016, from full blossom until harvest, and the fruit diameter was recorded monthly. The yield was significantly higher in OA-treated pomegranate trees, the on-tree ripening process being promoted in a concentration-dependent manner. With respect to quality traits, OA at 10 mM showed better results in terms of firmness, external color due to a red color enhancement, and respiration rate and sensory attributes. Then, a second-year experiment was performed with OA at 10 mM, and crop yield and fruit quality results were confirmed. In addition, an increase in glucose and total acidity, specifically malic and ascorbic acids, was observed in OA 10 mM-treated pomegranate fruit. Bioactive compounds were also higher in OA-treated fruit than control, the 10 mM concentration being the most effective in increasing total phenolics, total anthocyanins, and total antioxidant activity. Overall, results suggest that OA applied at 10 mM as preharvest treatment could be an effective tool to enhance pomegranate crop and quality and to improve the content of health-related compounds.

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“…The artichoke production reaches approximately 900,000 tons per year regarding only the main producer countries: Italy, Egypt, Spain and Argentina (FAO, 2017). Artichoke is rich in antioxidant compounds and has many health beneficial effects (Martínez-Esplá et al, 2017). The industrial processing of the artichoke involves the separation of outer bracts, stem and tip from pieces in order to obtain the artichoke heart, which is the edible fraction.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production

Polachini¹

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ACKNOWLEDGMENTSThis study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Finance Code 001. This study was also financed by CAPES to develop part of this PhD thesis in Spain under the grant number 88881.132626/2016-01. Thanks to the São Paulo Research Foundation (FAPESP) (Grant number 2017/06518-2) for their financial support to develop this project.At first, I would like to thank the Universitat Politècnica de València (UPV) and ASPA de amido) e no comportamento reológico (maior viscosidade) das suspensões prétratadas na presença de ultrassom. O campo acústico produzido nas suspensões sofreu uma redução durante a hidrólise, possivelmente devido às referidas alterações. Assim, pode-se concluir que o ultrassom de alta intensidade é uma tecnologia interessante para intensificar os pré-tratamentos de resíduos da agroindústria para a produção de bioetanol.Palavras-chave: Biomassa. Propriedades físicas. Campos acústicos. Hidrólise.Cinética. ABSTRACTThe pre-treatment of agroindustrial wastes is one of the most complex steps of their conversion process into bioethanol. This step consists basically of applying physical or chemical treatments in biomass in order to obtain carbohydrates partially hydrolyzed and more accessible for future action of enzymes and microorganisms. In this sense, the use of high-intensity ultrasound has been shown as a technology with an interesting potential, in combination with conventional methods, to enhance the mass and energy transfer processes. In the present study, it was characterized agroindustrial residues such as cassava bagasse, peanut shells and artichoke residues as potential materials for the production of bioethanol after acid pretreatment with and without the application of ultrasound. Thus, the different biomass/acid solutions systems were characterized according to their thermophysical properties (density, specific heat, thermal diffusivity and thermal conductivity) and rheological behavior. The acoustic fields generated in these different systems during ultrasound application were also characterized by a calorimetric method. Then, the ultrasonic intensity obtained in each case was related to the termophysical and reological properties. Subsequently, the kinetics of reducing and total sugar release and the structural changes produced in the suspensions considered during the pretreatments in acid solutions with conventional agitation or assisted by ultrasound were determined. The results obtained indicated that suspensions with higher acid concentration and higher solids content showed lower heat transfer capacity, given by the higher values for specific heat, thermal diffusivity, thermal conductivity. The same suspensions presented higher values of density and viscosity, which leads to greater resistance to flow. This fact was attributed, not only to the high viscosity, but also to the appearance of non-Newtonian rheological behavior as showed by the fitting of Herschel-Bulkley model. In these cases, the suspensions cont...

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Preharvest application of oxalic acid improves quality and phytochemical content of artichoke ( Cynara scolymus L.) at harvest and during storage

Cited by 38 publications

References 33 publications

Preharvest application of methyl jasmonate increases crop yield, fruit quality and bioactive compounds in pomegranate ‘Mollar de Elche’ at harvest and during postharvest storage

Preharvest application of methyl jasmonate increases crop yield, fruit quality and bioactive compounds in pomegranate ‘Mollar de Elche’ at harvest and during postharvest storage

Preharvest Application of Oxalic Acid Improved Pomegranate Fruit Yield, Quality, and Bioactive Compounds at Harvest in a Concentration-Dependent Manner

Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production

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