Postharvest Biology and Technology of Plum

Khan, Ahmad Sattar; Singh, Zora; Ali, Sajid

doi:10.1007/978-3-319-76843-4_5

Cited by 4 publications

(2 citation statements)

References 152 publications

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“…NADP-ME plays a major role in the degradation of malic acid in the cytoplasm, such as the content of organic acids in apple were negatively correlated with NADP-ME activity (Yao et al, 2009). The change in the activity of NAD-ME is consistent with the biosynthesis of malic acid, the increase in fruit respiration, and the gradual decrease of malic acid during fruit ripening (Khan et al, 2018). During storage of climacteric fruits e.g., apple, pear, banana, etc.…”

Section: Organic Acidssupporting

confidence: 58%

Sugar and acid profile of loquat (Eriobotrya japonica Lindl.), enzymes assay and expression profiling of their metabolism-related genes as influenced by exogenously applied boron

et al. 2022

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Soluble sugars and organic acids are the most abundant components in ripe fruits, and they play critical roles in the development of fruit flavor and taste. Some loquat cultivars have high acid content which seriously affect the quality of fruit and reduce the value of commodity. Consequently, studying the physiological mechanism of sugar-acid metabolism in loquat can clarify the mechanism of their formation, accumulation and degradation in the fruit. Minerals application has been reported as a promising way to improve sugar-acid balance of the fruits. In this study, loquat trees were foliar sprayed with 0.1, 0.2 and 0.3% borax, and changes in soluble sugars and organic acids were recorded. The contents of soluble sugars and organic acids were determined using HPLC-RID and UPLC-MS, respectively. The activities of enzymes responsible for the metabolism of sugars and acids were quantified and expressions of related genes were determined using quantitative real-time PCR. The results revealed that 0.2% borax was a promising treatment among other B applications for the increased levels of soluble sugars and decreased acid contents in loquats. Correlation analysis showed that the enzymes i.e., SPS, SS, FK, and HK were may be involved in the regulation of fructose and glucose metabolism in the fruit pulp of loquat. While the activity of NADP-ME showed negative and NAD-MDH showed a positive correlation with malic acid content. Meanwhile, EjSPS1, EjSPS3, EjSS3, EjHK1, EjHK3, EjFK1, EjFK2, EjFK5, and EjFK6 may play an important role in soluble sugars metabolism in fruit pulp of loquat. Similarly, EjPEPC2, EjPEPC3, EjNAD-ME1, EjNAD-MDH1, EjNAD-MDH5-8, EjNAD-MDH10, and EjNAD-MDH13 may have a vital contribution to malic acid biosynthesis in loquat fruits. This study provides new insights for future elucidation of key mechanisms regulating soluble sugars and malic acid biosynthesis in loquats.

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Section: Organic Acidssupporting

confidence: 58%

Sugar and acid profile of loquat (Eriobotrya japonica Lindl.), enzymes assay and expression profiling of their metabolism-related genes as influenced by exogenously applied boron

et al. 2022

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“…Another publication (Khan, Zingh, and Ali, 2018), focused on preharvest factors affecting the postharvest handling of plums, such as soil, climate (as the adequate light intensity and air temperature), canopy position, the tree genotype (cultivars and rootstocks), cultural practices (e.g. the method of mulching or deficit irrigation), mineral nutrition, irrigation, and the application of different chemicals.…”

Section: Introductionmentioning

confidence: 99%

Risk Analysis of Berry Harvesting in a Blueberry Plantation

Michniewicz¹,

Pogorzelski²,

Lesiów³

2022

Engineering Sciences And Technologies

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The purpose of the study was to conduct a risk analysis of the operation of a highbush blueberry plantation based on the FMEA method. The research was based on the information acquired from two private blueberry plantations differing in location (Sokolniki, Dybów) and acreage size (0.45 ha and 4 ha). It was pointed out that the greatest threat to both plantations, and thus to the quality of the product, turned out to be ensuring proper fertilization and protection from diseases and pests (risk index: 126). In addition, in the case of the first plantation, the location of the plantation (147), cutting and shaping of bushes that have a significant impact on plant development (120) and protection from wild birds (112) were of great importance. Similarly, plantation location, cutting and bush formation (162), yields, commercial quality of the harvest, and plantation location (112) were diagnosed as high risks for the second plantation. The most critical risks to blueberry quality occur at the first link in the logistics chain, i.e. the agricultural producer.

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1 H-cyclopropa[b]naphthalene: a novel ethylene antagonist for extending storage life and maintaining quality of climacteric and suppressed climacteric plums

2023

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Ethylene is a key trigger that governs the rate of fruit ripening, storability, and postharvest quality of fresh fruit. Efficient inhibition of ethylene action is essential to slow down the postharvest ripening processes, extend storage life and maintain optimum fruit quality during storage. Ethylene antagonist compounds with the likelihood of application as liquid formulation would facilitate managing ethylene broadly as both preharvest and/or postharvest treatments. This study examined the effects of different aqueous formulations of 1 H-cyclopropa[b]naphthalene (NC) as an ethylene antagonist in the cold stored (1 °C) Japanese plums ‘Angeleno’ (suppressed-climacteric) and ‘Tegan Blue’, which exhibit climacteric peaks, respectively. NC was applied as a 2 µM spray solution prepared using only distilled water (NCA), 5% ethanol (NCE), 0.02% Tween® 20 (NCT), 5% β-cyclodextrin (NCD) or a 1 µM fumigant for 18 h at ambient conditions (20 ± 1 °C). Regardless of formulation, NC retarded ethylene production in both the suppressed-climacteric and climactic cultivars. The capacity of NC to suppress ethylene production was relatively higher in ‘Angeleno’ than in ‘Tegan Blue’. Levels of bioactive compounds such as total phenols, total anthocyanins and total antioxidant capacity in fruit treated with NC were at par with the control. NC fumigation was the most effective treatment in suppressing ethylene production and maintaining fruit quality followed by NCE, NCT, NCD and NCA in both plum cultivars. Amongst the NC spray solutions, the ones with ethanol or Tween® 20 as adjuvants outperformed other solutions. Ethylene production positively correlated with weight loss, SSC, SSC: TA and concentrations of individual sugars, but was negatively correlated with firmness, titratable acidity (TA) and individual organic acids in both cultivars. The results also support the notion that ethylene has a role in the synthesis of phenolic compounds and anthocyanin depending on the sugar substrates present in the phenylpropanoid and flavonoid pathways.

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Postharvest Biology and Technology of Plum

Cited by 4 publications

References 152 publications

Sugar and acid profile of loquat (Eriobotrya japonica Lindl.), enzymes assay and expression profiling of their metabolism-related genes as influenced by exogenously applied boron

Sugar and acid profile of loquat (Eriobotrya japonica Lindl.), enzymes assay and expression profiling of their metabolism-related genes as influenced by exogenously applied boron

Risk Analysis of Berry Harvesting in a Blueberry Plantation

1 H-cyclopropa[b]naphthalene: a novel ethylene antagonist for extending storage life and maintaining quality of climacteric and suppressed climacteric plums

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