Ethylene mitigates nut decay and improves nut quality of Torreya grandis during postharvest by changing microbial community composition

IF 6.4 1区农林科学 Q1 AGRONOMY

Postharvest Biology and Technology Pub Date : 2024-10-14 DOI:10.1016/j.postharvbio.2024.113250

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引用次数: 0

Abstract

Torreya grandis nuts require postharvest ripening for oil accumulation, with ethephon (ETH) commonly used to induce such process, thereby impacting the endophytic microbial community. In this study, shelled T. grandis nuts were divided into two groups: one treated ETH and the other with water (CK). The ETH treatment expedited nutrient metabolism from day 5 till day 10 as manifested by a decline in starch content, while increasing oil and soluble protein, enhancing enzyme activity, and reducing nut decay incidence. ETH-treated nut exhibited greater bacterial and fungal diversity compared with CK, along with more distinct microbial biomarkers. Structural equation modeling linked with ETH treatment revealed that increased oil content was mediated via increased abundance of Myxozyma, Rhodobacter, and pyruvate kinase activity. Chalara, a fungal biomarker, was strongly correlated with decay incidence. These findings offer valuable biomarkers for mitigating decay and improving T. grandis nuts quality during post-ripening stage in the future.

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乙烯通过改变微生物群落的组成来减轻采后香榧坚果的腐烂并提高坚果质量

香榧果需要在收获后成熟才能积累油脂，通常使用乙硫磷（ETH）来诱导这一过程，从而影响内生微生物群落。在这项研究中，带壳的柚坚果被分为两组：一组经 ETH 处理，另一组经水（CK）处理。从第 5 天到第 10 天，ETH 处理加快了营养代谢，表现为淀粉含量下降，同时增加了油脂和可溶性蛋白质，提高了酶活性，降低了坚果腐烂率。与 CK 相比，ETH 处理过的坚果表现出更高的细菌和真菌多样性，以及更独特的微生物生物标记。与 ETH 处理相关的结构方程模型显示，油脂含量的增加是由 Myxozyma、Rhodobacter 和丙酮酸激酶活性的增加促成的。真菌生物标记物 Chalara 与腐烂发生率密切相关。这些发现为今后在柚子成熟后阶段减少腐烂和提高柚子质量提供了宝贵的生物标志物。

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.