Postharvest Biology and Technology最新文献_第6页

The role of microbial communities in maintaining post-harvest sugar beet storability

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-18 DOI: 10.1016/j.postharvbio.2025.113401

Daniela Wöber , Karin Hansel-Hohl , Sophie Rohringer , Martina Dokal , Livio Antonielli , Wibke Imgenberg , Herbert Eigner , Marion Seiter , Eva M. Molin

{"title":"The role of microbial communities in maintaining post-harvest sugar beet storability","authors":"Daniela Wöber , Karin Hansel-Hohl , Sophie Rohringer , Martina Dokal , Livio Antonielli , Wibke Imgenberg , Herbert Eigner , Marion Seiter , Eva M. Molin","doi":"10.1016/j.postharvbio.2025.113401","DOIUrl":"10.1016/j.postharvbio.2025.113401","url":null,"abstract":"<div><div>Sugar beet is an important crop for sugar production in Europe; however, the loss of sucrose during long storage periods poses a major challenge. Environmental factors coupled with the genetic makeup of the sugar beet influence its storability, with some genotypes showing greater resilience and maintaining high sugar content during storage. The pathogenic part of the plant-associated microbiome is considered one of the main causative agents. However, the same microbiome can also harbor beneficial microbes with potential biocontrol activities that positively affect storability. Despite extensive studies on pre-harvest microbiota, post-harvest microbial community dynamics and their impact on sugar beet quality remain largely unexplored. To uncover the underlying dynamics of microbial patterns associated with different storage capacities, we used 16S rRNA and ITS amplicon sequencing to analyze the bacterial and fungal communities, respectively. Four sugar beet varieties that exhibited disparate storability responses following a 12-week storage trial were investigated. This study identified temporal microbial differences and microbial markers associated with sugar beet storability. Specifically, the fungal class Saccharomycetes, along with the agonistic bacterial genus <em>Gluconobacter</em>, was correlated with reduced storage capacity. In contrast, good storage capacity was characterized by greater microbial diversity, including the fungal indicator taxon <em>Plectosphaerella</em> and the correlating Actinobacteria species. These biomarkers have the potential to be used to identify sugar beet varieties with good storability and to improve the storability of agricultural products.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113401"},"PeriodicalIF":6.4,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of sorting and grading methodology of jujubes using hyperspectral image data

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-18 DOI: 10.1016/j.postharvbio.2025.113406

Quoc Thien Pham , Shang-En Lu , Nai-Shang Liou

{"title":"Development of sorting and grading methodology of jujubes using hyperspectral image data","authors":"Quoc Thien Pham , Shang-En Lu , Nai-Shang Liou","doi":"10.1016/j.postharvbio.2025.113406","DOIUrl":"10.1016/j.postharvbio.2025.113406","url":null,"abstract":"<div><div>Using results obtained from hyperspectral image (HSI) data and pixel-wise classification model directly for jujube sorting and grading is challenging because misclassifications due to outliers and edge effects could lead to incorrect judgments. Moreover, not all jujube defects pose an equal hazard or cause the specific jujube to be rejected from the sorting line. The market can still accept jujubes with defects not related to food safety. In addition, the classification results of the stem end region of jujube should be specially treated for different markets. In this study, a methodology using hyperspectral imaging data for the sorting and grading of jujubes was investigated. The tasks involved the development of procedures to remove misclassification caused by the curvature effect and outliers, to identify the stem end region of jujube, and to make the sorting (keep/reject) and grading judgments of the jujube under investigation for the target markets. The findings demonstrate that an algorithm utilizing aspect ratios and locations of the defect components in the defect maps can effectively identify and remove misclassification due to the curvature effect, the YOLOv8n-seg model can well identify the stem end regions, and using morphological operations to remove defect components that have fewer than 10 pixels can properly remove the salt-and-pepper defect outliers. The accuracy of the jujube sorting procedure used to remove defective jujubes is 91.78 %, based on the results of 210 jujube samples. The intact jujubes or jujubes with only russet defects were graded to three levels based on the amount of russet area and shape irregularity. A jujube with russet pixels less than 8000 and an irregular shape index less than 0.07 is considered Premium-grade.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113406"},"PeriodicalIF":6.4,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broccoli stem extract enhances browning inhibition in fresh-cut peach fruit by inhibiting polyphenol oxidase activity and improving antioxidant capacity

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-16 DOI: 10.1016/j.postharvbio.2025.113399

Fengru Zhang , Shu Jiang , Shuang Jia , Boya Gui , Yingying Wei , Yi Chen , Jianfen Ye , Feng Xu , Phebe Ding , Xingfeng Shao

{"title":"Broccoli stem extract enhances browning inhibition in fresh-cut peach fruit by inhibiting polyphenol oxidase activity and improving antioxidant capacity","authors":"Fengru Zhang , Shu Jiang , Shuang Jia , Boya Gui , Yingying Wei , Yi Chen , Jianfen Ye , Feng Xu , Phebe Ding , Xingfeng Shao","doi":"10.1016/j.postharvbio.2025.113399","DOIUrl":"10.1016/j.postharvbio.2025.113399","url":null,"abstract":"<div><div>This study focused on the anti-browning effect of broccoli stem extract (BE) on fresh-cut peaches. Compared to L-cysteine (L-Cys), BE showed the higher inhibition of the surface browning in fresh-cut peach fruit. This was accompanied with a more decreased polyphenol oxidase (PPO) activity and down-regulation of <em>PpPPO</em> expression. BE showed a non-competitive inhibition for peach PPO, and the highest inhibition rate (85.23 ± 3.86 %) was found when PPO catalyzed the oxidation of catechol. Furthermore, sulfur-containing compounds, including methylthiouracil (MTU), S-Methyl methanethiosulfonate (MMTS) and thiophene, 2-propyl- were identified in BE and shown to inhibit PPO activity. The molecular docking also indicated that these three compounds spontaneously bound PPO via hydrogen bonding, π-π conjugation and hydrophobic interactions, resulting in the PPO inhibition and its associated browning. BE also increased the total phenol and flavonoids content as well as antioxidant capacities in fresh-cut fruit, suggested by increased activities of catalase (CAT), ascorbate peroxidase (APX) and 2, 2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) free radical scavenging rate. Therefore, BE could be a natural anti-browning agent that can be used for the inhibition of PPO-initiated discoloration in peach fruit.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113399"},"PeriodicalIF":6.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The contamination of Alternaria alternata alters the compounds in cherry fruit during cold storage

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-16 DOI: 10.1016/j.postharvbio.2025.113408

Feng Wang , Dongjie Liu , Ruijing Liu , Qin Wang , Gengsheng Xiao , Lukai Ma

{"title":"The contamination of Alternaria alternata alters the compounds in cherry fruit during cold storage","authors":"Feng Wang , Dongjie Liu , Ruijing Liu , Qin Wang , Gengsheng Xiao , Lukai Ma","doi":"10.1016/j.postharvbio.2025.113408","DOIUrl":"10.1016/j.postharvbio.2025.113408","url":null,"abstract":"<div><div><em>Alternaria alternata</em> is a common fruit-decaying fungus that is potentially hazardous to fruit quality and human health. In this study, volatile and non-volatile compounds in cherry quality after artificial inoculation with <em>A. alternata</em> during cold storage were investigated using HS-GC-IMS and LC-MS. After fungal exposure, cherry samples exhibited significant changes in fungal counts, fruit firmness, and total soluble solid. A total of 36 volatile compounds, including 15 alcohols, 9 aldehydes, 5 esters, 4 ketones, 2 sulfur compounds, and 1 hydrocarbon were detected in the cherries by HS-GC-IMS. Changes in various aldehydes and sulfur compounds occurred in the early and middle storage stages, and changes in alcohols, esters, and ketones occurred in the middle-later storage stages. Seven types of non-volatile compounds were identified as key differential metabolites including 2-hydroxyphenylacetic acid O-b-D-glucoside, 2-O-benzoyl-D-glucose, gluconic acid, D-glucuronic acid, malonic acid, portulacaxanthin II, and altenusin, which are involved in the biosynthesis pathways of glucose, glycoside compounds, betalain, and fungal metabolites. This study provides further understanding of the relationship between the contamination of <em>A. alternata</em> and the quality of cherry fruit and lays the foundation for preservation technology for fresh fruit.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113408"},"PeriodicalIF":6.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Melatonin treatment delays postharvest senescence of ‘Dayagan’ hybrid citrus fruit by enhancing reactive oxygen species-scavenging capacity and preserving higher unsaturated fatty acid content

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-14 DOI: 10.1016/j.postharvbio.2025.113400

Min Hong , Lian Zhou , Hui Zhang , Linhua Huang , Mingyang He

{"title":"Melatonin treatment delays postharvest senescence of ‘Dayagan’ hybrid citrus fruit by enhancing reactive oxygen species-scavenging capacity and preserving higher unsaturated fatty acid content","authors":"Min Hong , Lian Zhou , Hui Zhang , Linhua Huang , Mingyang He","doi":"10.1016/j.postharvbio.2025.113400","DOIUrl":"10.1016/j.postharvbio.2025.113400","url":null,"abstract":"<div><div>This study sought to investigate whether melatonin (MT)-induced alterations in membrane fatty acid and reactive oxygen species (ROS) metabolism are associated with senescence of citrus fruits during storage. The findings demonstrated that applying 1 g L<sup>−1</sup> MT reduced the respiration rate, delayed weight loss and decay, and maintained better inner fruit quality. MT alleviated oxidative damage and protected membrane stability by lowering malondialdehyde and electrolyte leakage levels. MT increased the antioxidant content (ascorbic acid, total phenols, and total flavonoids) along with enhancing the ferric ion-reducing antioxidant power and 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity and promoted the activity of enzymes like superoxide dismutase, peroxidase, and catalase, thereby decreasing ROS accumulation. MT-treated fruits had higher unsaturated fatty acid (USFA) content by regulating lipase and lipoxygenase, which contributed to improving the ratio of USFAs to saturated fatty acids and the double-bond index. Furthermore, a significant relationship between membrane stability and postharvest fruit senescence was confirmed. These results suggest that MT inhibits postharvest physiological senescence and enhances the storage performance of citrus fruits by enhancing ROS-scavenging capacity and preserving higher unsaturated fatty acid content to alleviate membrane oxidative damage and maintain membrane stability.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113400"},"PeriodicalIF":6.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated transcriptomic and metabolomic analysis of delayed leaf yellowing in postharvest pak choi (Brassica rapa subsp. chinensis) by 2-ethylhexanol (2-EH)

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-14 DOI: 10.1016/j.postharvbio.2025.113403

Mina Wang , Xiaozhen Yue , Lingda Yu , Zixin Lin , Shuzhi Yuan , Xiaodi Xu , Jinhua Zuo , Bihong Feng , Qing Wang

{"title":"Integrated transcriptomic and metabolomic analysis of delayed leaf yellowing in postharvest pak choi (Brassica rapa subsp. chinensis) by 2-ethylhexanol (2-EH)","authors":"Mina Wang , Xiaozhen Yue , Lingda Yu , Zixin Lin , Shuzhi Yuan , Xiaodi Xu , Jinhua Zuo , Bihong Feng , Qing Wang","doi":"10.1016/j.postharvbio.2025.113403","DOIUrl":"10.1016/j.postharvbio.2025.113403","url":null,"abstract":"<div><div>The antioxidant properties of 2-ethylhexanol (2-EH) have the potential to maintain the quality of pak choi during storage. Therefore, the effect of 2-EH on pak choi during storage for 7 d at 20 °C and 90 % relative humidity (RH) was investigated. Results demonstrated that fumigation of pak choi with 2-EH maintained the quality of pak choi by reducing the respiration rate, ethylene generation, the level of malondialdehyde (MDA), and electrolyte leakage, while increasing the level of total soluble solids (TSS), ascorbic acid, flavonoids, total phenolics, and alpha-linolenic acid, relative to the untreated control. Transcriptomic and metabolomic analyses revealed that 2-EH mitigated chlorophyll degradation by up-regulating the expression of <em>CRD1</em>, <em>POR</em>, <em>DVR</em>, <em>CHLP</em>, and <em>CHLG</em> in the porphyrin and chlorophyll metabolism pathways, and by down-regulating <em>SGR2</em>. 2-EH also increased antioxidant enzyme activity and up-regulated the expression of <em>PAL</em>, <em>C4H</em>, <em>BRT1</em>, <em>CYP98A</em>, <em>CCR</em>, <em>FLS</em>, and <em>LDOX</em> in the phenylpropanoid and flavonoid biosynthesis pathways, increased phenolic content, and enhanced antioxidant capacity, thereby, mitigating excessive accumulation of reactive oxygen species (ROS). The 2-EH treatment also up-regulated <em>HPL1</em> and <em>AOS</em> genes in the alpha-linolenic acid metabolic pathway and down-regulated the expression of <em>ACOX</em> and <em>MFP2,</em> thus, increasing alpha-linolenic acid content and maintaining cell membrane structure. In summary, our study demonstrated that 2-EH maintained pak choi quality during storage and provided insights into the underlying molecular and metabolic changes associated with delayed yellowing of pak choi by 2-EH.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113403"},"PeriodicalIF":6.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antifungal and mechanism of rose essential oil against Monilinia fructicola caused brown rot of peach fruit

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-14 DOI: 10.1016/j.postharvbio.2025.113398

Dedong Min , Huanyu Wu , Meng Xu , Peng Leng , Jie Sun , Yun-Guo Liu

{"title":"Antifungal and mechanism of rose essential oil against Monilinia fructicola caused brown rot of peach fruit","authors":"Dedong Min , Huanyu Wu , Meng Xu , Peng Leng , Jie Sun , Yun-Guo Liu","doi":"10.1016/j.postharvbio.2025.113398","DOIUrl":"10.1016/j.postharvbio.2025.113398","url":null,"abstract":"<div><div>Peach fruits exhibit high susceptibility to fungal pathogens, significantly limiting their storage period and resulting in substantial economic losses. Identification of fungal strains affecting peaches fruit decay revealed that <em>Monilinia fructicola</em> is the most aggressive pathogen. Rose essential oil (REO) has demonstrated antimicrobial activity against a wide range of microorganisms; however, its antifungal properties and mechanisms against <em>M. fructicola</em> have not been thoroughly investigated. In this study, both <em>in vivo</em> and <em>in vitro</em> experiments were performed, revealing that REO possesses strong antifungal activity against <em>M. fructicola</em>, effectively inhibiting brown rot in postharvest peaches. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses indicated that REO treatment caused significant damage to the morphology and ultrastructure of <em>M. fructicola</em>. REO compromised cell membrane integrity, leading to increased electrical conductivity and nucleic acid concentrations. REO treatment also resulted in decreased activities of ATPase, malate dehydrogenase (MDH), and succinate dehydrogenase (SDH), adversely affecting the respiratory processes of <em>M. fructicola</em>. Furthermore, REO treatment also inhibited the decrease of firmness and total phenolic content. Therefore, REO presents a promising and environmentally friendly alternative to conventional fungicides for the control of brown rot in peach fruits.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113398"},"PeriodicalIF":6.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AI-driven deep learning framework for shelf life prediction of edible mushrooms

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-12 DOI: 10.1016/j.postharvbio.2025.113396

Shima Javanmardi , Seyed-Hassan Miraei Ashtiani

{"title":"AI-driven deep learning framework for shelf life prediction of edible mushrooms","authors":"Shima Javanmardi , Seyed-Hassan Miraei Ashtiani","doi":"10.1016/j.postharvbio.2025.113396","DOIUrl":"10.1016/j.postharvbio.2025.113396","url":null,"abstract":"<div><div>Fresh edible mushrooms are highly perishable, prone to microbial contamination, and have a limited shelf life, making it essential to assess their freshness to ensure food safety and minimize waste. Additionally, the freshness of mushrooms has a significant impact on consumer health and market prices. This study introduces and evaluates a computer vision-based application utilizing convolutional neural networks (CNNs) to estimate the shelf life of three widely consumed mushroom varieties: white button, shiitake, and oyster, stored at 4 ± 1 °C. To improve classification accuracy and reduce training costs, transfer learning was employed to fine-tune CNN models, including EfficientNet, NASNetLarge, ResNet-50, Inception-V3, and MobileNet-V2. ResNet-50 demonstrated the highest performance for white button and oyster mushrooms, with overall accuracies of 94.10 % and 89.11 %, respectively, processing 1960 images in 6.39 min for the former and 8.70 min for the latter. For shiitake mushrooms, MobileNet-V2 showed superior performance with an accuracy of 86.36 % and a processing time of 5.73 min. Integrating digital imaging with CNN methods offers a reliable and efficient approach for rapid and precise evaluation of mushroom freshness. This technology can significantly improve monitoring during the postharvest storage and distribution stages, facilitating informed decision-making and timely actions to reduce spoilage.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113396"},"PeriodicalIF":6.4,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High relative humidity storage mitigates chilling injury in zucchini fruit via regulating the CpMYB63-mediated cell wall degradation

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-11 DOI: 10.1016/j.postharvbio.2025.113388

Xiaoxia Zuo , Jing Wang , Zhengguo Wu, Peng Jin, Yonghua Zheng

{"title":"High relative humidity storage mitigates chilling injury in zucchini fruit via regulating the CpMYB63-mediated cell wall degradation","authors":"Xiaoxia Zuo , Jing Wang , Zhengguo Wu, Peng Jin, Yonghua Zheng","doi":"10.1016/j.postharvbio.2025.113388","DOIUrl":"10.1016/j.postharvbio.2025.113388","url":null,"abstract":"<div><div>The effect of high relative humidity (HRH) storage on cell wall degradation and the possible regulation mechanism mediated by CpMYB63 in zucchini fruit during cold storage (4 ℃) were investigated. The present results showed that HRH (RH: 96–100 %) storage decreased weight loss and firmness loss together with the chilling injury (CI) of zucchini under chilling stress. HRH storage inhibited the solubilization of cell wall polysaccharides induced by the CI development, as shown by the lower level of water-soluble faction and the higher levels of Na<sub>2</sub>CO<sub>3</sub>-soluble faction and hemicellulose in HRH-fruit than in the control-fruit (RH: 72–76 %). Meanwhile, the increase in activities of pectin methylesterase and polygalacturonase in chilled zucchini fruit is also depressed by HRH. Furthermore, HRH maintained lower expression levels of <em>CpPME3</em>, <em>CpPG1</em> as well as <em>CpMYB63</em> in zucchini during cold storage. The CpMYB63 was characterized as a nucleus-localized protein and positively regulated the transcription of <em>CpPME3</em> and <em>CpPG1</em>. Taken together, the results suggested that the inhibitory effect of HRH on cell wall degradation contributed to the decreased CI in zucchini under chilling stress, which was associated with the lower level of <em>CpMYB63</em> expression and the weakened transcription activation of CpMYB63 to <em>CpPME3</em> and <em>CpPG1</em> caused by HRH storage.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113388"},"PeriodicalIF":6.4,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of core browning and fruit firmness in stored ‘Braeburn’ apples: Multivariate time series classification

IF 6.4 1区农林科学

Postharvest Biology and Technology Pub Date : 2025-01-11 DOI: 10.1016/j.postharvbio.2024.113381

Lukas Munser , Roy McCormick , Grigory Devadze , Nils Siefen , Stefan Streif , Konni Biegert

{"title":"Prediction of core browning and fruit firmness in stored ‘Braeburn’ apples: Multivariate time series classification","authors":"Lukas Munser , Roy McCormick , Grigory Devadze , Nils Siefen , Stefan Streif , Konni Biegert","doi":"10.1016/j.postharvbio.2024.113381","DOIUrl":"10.1016/j.postharvbio.2024.113381","url":null,"abstract":"<div><div>Physiological storage disorders affect many commercial apple cultivars and cause economic loss and increase food waste. In general, robust prediction methods for disorders such as ‘Braeburn’ internal browning, specifically core browning as it is most prevalent in Southwest Germany, do not exist. A good understanding of the causal factors is still lacking, but symptom development varies markedly between orchards. This work describes a combined modeling and machine learning approach to link pre-harvest environmental, tree and management factors with post-harvest storage outcomes to predict internal browning and fruit firmness. Non-destructive spectral time series data were collected from ‘Braeburn’ apples over seven seasons from 2016 to 2023 from orchards located in Southwest Germany. These data were used as reference measurements to construct a weather-based model to produce multivariate time series for changes in four fruit quality parameters: chlorophyll, anthocyanins, soluble solids and dry matter content during pre-harvest growth and development on the tree. The multivariate times-series were then used as input into a dynamic time warping (DTW)-based k-nearest neighbor (kNN) classifier. The data set contains 1729 objects and the classifier shows reliable good cross validated prediction results for internal browning and firmness, respectively. After DTW and dimension reduction mapping, 2D cluster analysis shows each season as being clearly separated in multidimensional space. However, single season learning cannot be generalized to other seasons. The multidimensional distance between browning clusters is related to the average rate of change in the spectral scanning data during the 50 d pre-harvest period. Fruit lots with high browning show a higher mean cumulative change.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"222 ","pages":"Article 113381"},"PeriodicalIF":6.4,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0