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首页> 外文期刊>Acta Physiologiae Plantarum >Interactions among chilling tolerance, sucrose degradation and organic acid metabolism in UV-C-irradiated peach fruit during postharvest cold storage
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Interactions among chilling tolerance, sucrose degradation and organic acid metabolism in UV-C-irradiated peach fruit during postharvest cold storage

机译：紫外线辐照桃子果实中冷却耐受性，蔗糖降解和有机酸代谢的相互作用

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摘要

UV-C irradiation treatment has been demonstrated to be able to enhance chilling tolerance in peach (Prunus persica L. Batsch) during postharvest cold storage. Sugar and organic acid play central roles in plant metabolism. However, little is known about the relationships among chilling injury, soluble sugar and organic acid in peaches subjected to UV-C. In this study, peaches were irradiated with UV-C (1.5kJ/m(2)) and then stored at 1 degrees C for 35days. The content of sugar and organic acid, activities of enzymes, and the expression of enzyme genes that catalyze the metabolism of sugar and acid were evaluated. Results showed that UV-C significantly alleviated chilling injury and maintained the quality of peaches during storage. For sugar metabolism, UV-C suppressed sucrose degradation and glucose production mostly by inhibiting the enzyme activity and mRNA transcription of invertase (-d-fructofuranoside fructohydrolase; EC 3.2.1.26) during the cold storage. For organic acid metabolism, UV-C irradiation downregulated the enzyme activities and gene expressions of aconitase (citrate hydrolyase; EC 4.2.1.3), and NADP-malic enzyme (S-malate: NADP-oxidoreductase; EC 1.1.1.40), but upregulated the enzyme activities and gene expressions of citrate synthase (acetyl-CoA: oxaloacetate C-acetyltransferase; EC 2.3.3.1) and NAD-malate dehydrogenase (l-malate: NAD-oxidoreductase; EC 1.1.1.37), leading to the low degradation of citric and malic acids during the whole storage periods. These results suggest that UV-C enhanced chilling tolerance in peach fruit during cold storage by suppressing the degradations of sucrose, citric, and malic acids.
机译：已经证明了UV-C辐射处理能够在采后冷藏期间增强桃（Prunus Persica L. Batsch）的耐寒性耐受性。糖和有机酸在植物代谢中起中央角色。然而，关于在经过UV-C的桃子中的烘干损伤，可溶性糖和有机酸之间的关系很少。在该研究中，用UV-C（1.5kJ / m（2））照射桃子，然后在1℃下储存35天。评价糖和有机酸，酶活性的含量，以及催化糖和酸代谢的酶基因的表达。结果表明，UV-C显着缓解寒冷损伤，并在储存期间保持桃子的质量。对于糖代谢，UV-C抑制蔗糖降解和葡萄糖产量主要通过抑制冷储存期间转化酶（-D-Fructoburanide Fructoholdolase; EC 3.2.1.26）的酶活性和mRNA转录。对于有机酸代谢，UV-C辐射下调了亚氨酶（柠檬酸水解酶; EC 4.2.1.3）的酶活性和基因表达，以及NADP-苹果醛酶（S苹果醛：NADP-氧化还原酶; EC 1.1.1.40），但上调柠檬酸合酶的酶活性和基因表达（乙酰-CoA：草氟乙酯C-乙酰转移酶; EC 2.3.3.1）和NAD苹果酸脱氢酶（L-苹果酸：NAD-氧化还原酶; EC 1.1.1.37），导致低降解整个储存期间柠檬酸和苹果酸。这些结果表明，通过抑制蔗糖，柠檬酸和苹果酸的降解，uV-C在冷库期间增强了桃子果实中的耐寒性。

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  • 来源
    《Acta Physiologiae Plantarum》 |2019年第6期|共16页
  • 作者

    Zhou Dandan; Chen Shaoxia; Xu Rui; Tu Sicong; Tu Kang;

  • 作者单位

    Nanjing Agr Univ Coll Food Sci &

    Technol 1 Weigang Rd Nanjing 210095 Jiangsu Peoples R China;

    Nanjing Agr Univ Coll Food Sci &

    Technol 1 Weigang Rd Nanjing 210095 Jiangsu Peoples R China;

    Nanjing Agr Univ Coll Food Sci &

    Technol 1 Weigang Rd Nanjing 210095 Jiangsu Peoples R China;

    Univ Oxford Med Sci Div Oxford OX3 7BN England;

    Nanjing Agr Univ Coll Food Sci &

    Technol 1 Weigang Rd Nanjing 210095 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Citric acid; Malic acid; Peach; Sucrose; UV-C;

    机译：柠檬酸;苹果酸;桃;蔗糖;UV-C;

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