Salicylic acid treatment improves the storability of fresh longan by regulating the metabolisms of respiration and energy

IF 6.4 1区农林科学 Q1 AGRONOMY

Postharvest Biology and Technology Pub Date : 2024-10-19 DOI:10.1016/j.postharvbio.2024.113258

Huili Zhang , Tingting Shan , Yang Chen , Hongyi Wen , Mengshi Lin , Zhongqi Fan , Hui Wang , Yihui Chen , Hetong Lin , Yifen Lin

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Abstract

This work investigated how salicylic acid (SA) treatment enhanced the storage quality of longan fruit by affecting its respiration and energy metabolism. Compared to control longan, SA-treated longan exhibited higher levels of commercially acceptable fruit rate, sucrose, vitamin C, TSS, and total soluble sugar, but lower levels of fruit disease index, pulp breakdown index, weight loss, TA, and reducing sugar. Additionally, SA treatment resulted in lower fruit respiration rate, lower activities of the critical enzymes involved in respiratory pathways (PGI, SDH, CCO, AAO), lower values of NADH and NAD, higher activities of enzymes (NADK, G-6-PDH + 6-PGDH), and higher amounts of NADPH and NADP. Besides, SA-treated longan showed higher levels of ATP, ADP, and energy charge, but lower AMP level, along with higher activities of H⁺-ATPase, Ca²⁺-ATPase, and Mg²⁺-ATPase in mitochondrial, plasma, and vacuolar membranes. These data indicated that SA treatment-maintained the storage attributes of postharvest longan was due to the weakened respiratory intensity, the reduced consumption of nutrients, the inhibited respiratory pathways of EMP-TCA cycle, and the enhanced respiratory pathway of PPP. Additionally, SA treatment retained higher levels of ATPase activity and energy status to maintain cellular ionic balance and protect membrane integrity, ultimately improved the storability of fresh longan during storage.

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水杨酸处理通过调节呼吸和能量代谢提高新鲜龙眼的耐贮藏性

这项研究探讨了水杨酸（SA）处理如何通过影响龙眼果实的呼吸作用和能量代谢来提高其贮藏质量。与对照龙眼相比，经水杨酸处理的龙眼具有更高的商业可接受果率、蔗糖、维生素 C、TSS 和总可溶性糖含量，但果实病害指数、果肉破坏指数、失重、TA 和还原糖含量较低。此外，SA 处理导致果实呼吸速率降低，参与呼吸途径的关键酶（PGI、SDH、CCO、AAO）活性降低，NADH 和 NAD 值降低，酶（NADK、G-6-PDH + 6-PGDH）活性升高，NADPH 和 NADP 含量升高。此外，SA 处理的龙眼线粒体、浆膜和液泡膜中的 ATP、ADP 和能量电荷水平较高，但 AMP 水平较低，H+-ATPase、Ca2+-ATPase 和 Mg2+-ATPase 活性较高。这些数据表明，SA 处理之所以能保持采后龙眼的贮藏特性，是因为它削弱了呼吸强度，减少了营养物质的消耗，抑制了 EMP-TCA 循环的呼吸途径，增强了 PPP 的呼吸途径。此外，SA 处理保留了较高水平的 ATPase 活性和能量状态，以维持细胞离子平衡和保护细胞膜完整性，最终提高了新鲜龙眼在贮藏期间的贮藏性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Postharvest Biology and Technology 农林科学-农艺学

CiteScore

12.00

自引率

11.40%

发文量

309

审稿时长

38 days

期刊介绍： The journal is devoted exclusively to the publication of original papers, review articles and frontiers articles on biological and technological postharvest research. This includes the areas of postharvest storage, treatments and underpinning mechanisms, quality evaluation, packaging, handling and distribution of fresh horticultural crops including fruit, vegetables, flowers and nuts, but excluding grains, seeds and forages. Papers reporting novel insights from fundamental and interdisciplinary research will be particularly encouraged. These disciplines include systems biology, bioinformatics, entomology, plant physiology, plant pathology, (bio)chemistry, engineering, modelling, and technologies for nondestructive testing. Manuscripts on fresh food crops that will be further processed after postharvest storage, or on food processes beyond refrigeration, packaging and minimal processing will not be considered.