Phytochemical content, antioxidants and cell wall metabolism of two loquat (Eriobotrya japonica) cultivars under different storage regimes

Goulas, Vlasios; Minas, Ioannis S.; Kourdoulas, P.M.; Vicente, Ariel Roberto; Manganaris, George A.

doi:10.1016/j.foodchem.2014.01.054

Cited by 41 publications

(23 citation statements)

References 44 publications

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“…The exocarp of control fruit increased their AIR content whereas preconditioned fruit showed similar levels as freshly harvested fruit. The highest AIR content in exocarp of control fruit indicates a higher mass of total cell wall per fresh weight, what could be due to greater dehydration of the tissue in relation to the development of CI similar to that described in loquat (Cao et al, 2009(Cao et al, , 2010Goulas et al, 2014). Moreover, the microscopic analysis of this tissue showed symptoms of dehydration in damaged areas where can be observed a higher cell density that are collapsed and dead.…”

Section: Discussionsupporting

confidence: 62%

Cell wall metabolism and chilling injury during postharvest cold storage in zucchini fruit

Carvajal

Palma

Jamilena

et al. 2015

Postharvest Biology and Technology

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Section: Discussionsupporting

confidence: 62%

Cell wall metabolism and chilling injury during postharvest cold storage in zucchini fruit

Carvajal

Palma

Jamilena

et al. 2015

Postharvest Biology and Technology

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“…The increase of fruit phenolic content can be due to the postharvest accumulation of phenolics or the biochemical transformation of phenolic compounds. Biotransformation can affect the estimated phenolic content, since each compound has different molar extinction coefficient ( e ), thus they contribute unequally to absorbance . In addition, the formation of melanoidins through Maillard reaction of sugars with amino acids can interfere in the determination of phenolics, since they have maximum absorptions at 280, 325, 405 and 420 nm .…”

Section: Resultsmentioning

confidence: 99%

Edible coating composed of chitosan andSalvia fruticosaMill. extract for the control of grey mould of table grapes

Kanetis

Exarchou

Charalambous

et al. 2016

J. Sci. Food Agric.

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“…Therefore, although initially considered as an underutilized crop, nowadays loquat can gain added value as it is available during late winter- early spring period [5]. The loquat tree has three flushes of growth per year, and the principal tree growth can be separated into 8 distinct developmental stages [2].…”

Section: Introductionmentioning

confidence: 99%

“…White-fleshed cultivars have a creamy, pale yellow color, while the terms red- and orange-fleshed can be considered as synonymous. The latter type cultivars have higher carotenoid concentrations than the lighter coloured ones [1, 5, 9, 10, 12]. …”

Section: Introductionmentioning

confidence: 99%

Metabolic and transcriptional elucidation of the carotenoid biosynthesis pathway in peel and flesh tissue of loquat fruit during on-tree development

et al. 2017

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BackgroundCarotenoids are the main colouring substances found in orange-fleshed loquat fruits. The aim of this study was to unravel the carotenoid biosynthetic pathway of loquat fruit (cv. ‘Obusa’) in peel and flesh tissue during distinct on-tree developmental stages through a targeted analytical and molecular approach.ResultsSubstantial changes regarding colour parameters, both between peel and flesh and among the different developmental stages, were monitored, concomitant with a significant increment in carotenoid content. Key genes and individual compounds that are implicated in the carotenoid biosynthetic pathway were further dissected with the employment of molecular (RT-qPCR) and advanced analytical techniques (LC-MS). Results revealed significant differences in carotenoid composition between peel and flesh. Thirty-two carotenoids were found in the peel, while only eighteen carotenoids were identified in the flesh. Trans-lutein and trans-β-carotene were the major carotenoids in the peel; the content of the former decreased with the progress of ripening, while the latter registered a 7.2-fold increase. However, carotenoid profiling of loquat flesh indicated trans-β-cryptoxanthin, followed by trans-β-carotene and 5,8-epoxy-β-carotene to be the most predominant carotenoids. High amounts of trans-β-carotene in both tissues were supported by significant induction in a chromoplast-specific lycopene β-cyclase (CYCB) transcript levels. PSY1, ZDS, CYCB and BCH were up-regulated and CRTISO, LCYE, ECH and VDE were down-regulated in most of the developmental stages compared with the immature stage in both peel and flesh tissue. Overall, differential regulation of expression levels with the progress of on-tree fruit development was more evident in the middle and downstream genes of carotenoid biosynthetic pathway.ConclusionsCarotenoid composition is greatly affected during on-tree loquat development with striking differences between peel and flesh tissue. A link between gene up- or down-regulation during the developmental stages of the loquat fruit, and how their expression affects carotenoid content per tissue (peel or flesh) was established.Electronic supplementary materialThe online version of this article (doi:10.1186/s12870-017-1041-3) contains supplementary material, which is available to authorized users.

show abstract

Phytochemical content, antioxidants and cell wall metabolism of two loquat (Eriobotrya japonica) cultivars under different storage regimes

Cited by 41 publications

References 44 publications

Cell wall metabolism and chilling injury during postharvest cold storage in zucchini fruit

Cell wall metabolism and chilling injury during postharvest cold storage in zucchini fruit

Edible coating composed of chitosan andSalvia fruticosaMill. extract for the control of grey mould of table grapes

Metabolic and transcriptional elucidation of the carotenoid biosynthesis pathway in peel and flesh tissue of loquat fruit during on-tree development

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