Metabolic Alterations in Postharvest Pear Fruit As Influenced by 1-Methylcyclopropene and Controlled Atmosphere Storage,Journal of Agricultural and Food Chemistry

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Metabolic Alterations in Postharvest Pear Fruit As Influenced by 1-Methylcyclopropene and Controlled Atmosphere Storage
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-11-25 00:00:00 , DOI: 10.1021/acs.jafc.8b04912
Edward J. Flaherty ₁ , Geoffrey B. Lum ₁ , Jennifer R. DeEll ₂ , Sanjeena Subedi ₃ , Barry J. Shelp ₁ , Gale G. Bozzo ₁

Affiliation

This study assessed the impact of 1-methylcyclopropene (1-MCP) and controlled atmosphere (CA) on the metabolism of targeted amino acids, organic acids, and antioxidants in stored ‘AC Harrow Crisp’ pears and their relationships to storage disorders. Pears were treated with 0 or 300 nL L^–1 1-MCP and stored at 0 °C under ambient air or CA. Spectrophotometric assays demonstrated that glutathione levels fluctuated with storage and were most preserved by 1-MCP under ambient air. HPLC analysis revealed that ascorbate concentrations declined with storage and were little affected by 1-MCP and CA. Citrate, lactate, and fumarate accumulated with storage but were differentially affected by 1-MCP. Aspartate and glutamate concentrations were greater with 1-MCP; γ-aminobutyrate accumulated in disordered fruit. Principal component analysis demonstrated that alterations in citrate and fumarate were, respectively, correlated with internal breakdown and senescent scald. γ-Aminobutyrate and alanine were associated with internal cavities. All disorders were associated with antioxidant depletion.

中文翻译：

1-甲基环丙烯和受控气氛储存对梨果实采后代谢的影响

这项研究评估了1-甲基环丙烯（1-MCP）和受控气氛（CA）对储存的'AC Harrow Crisp'梨中目标氨基酸，有机酸和抗氧化剂的代谢及其与储存障碍的关系的影响。梨用0或300 nL L ^–1处理1-MCP，并在环境空气或CA下于0°C储存。分光光度法测定表明，谷胱甘肽水平随存储而波动，并且在环境空气中被1-MCP保留最多。HPLC分析显示，抗坏血酸浓度随储存而下降，几乎不受1-MCP和CA的影响。柠檬酸盐，乳酸盐和富马酸盐随着储存而积累，但是受1-MCP的影响不同。1-MCP的天冬氨酸和谷氨酸盐浓度更高；γ-氨基丁酸酯在无序果实中积累。主成分分析表明，柠檬酸盐和富马酸盐的变化分别与内部分解和衰老相关。γ-氨基丁酸酯和丙氨酸与内腔相关。所有疾病均与抗氧化剂消耗有关。

更新日期：2018-11-25

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