Postharvest Biology and Technology最新文献

{"title":"Flower senescence: A comprehensive update on hormonal regulation and molecular aspects of petal death","authors":"Mohammad Lateef Lone,&nbsp;Aehsan ul Haq,&nbsp;Sumira Farooq,&nbsp;Shazia Parveen,&nbsp;Foziya Altaf,&nbsp;Inayatullah Tahir","doi":"10.1016/j.postharvbio.2024.113299","DOIUrl":"10.1016/j.postharvbio.2024.113299","url":null,"abstract":"<div><div>Senescence marks the final phase in the ontogeny of flower development, characterized by a cascade of physiological, biochemical, and molecular changes that lead to cellular degradation and subsequent death of petal tissues. This process, widely regarded as a developmental form of programmed cell death (PCD), parallels apoptosis, involving a succession of metabolic shifts, ROS accumulation, lipid peroxidation, and the breakdown of essential cellular components such as proteins, nucleic acids, and carbohydrates. The crosstalk of various plant growth regulators (PGRs), such as ethylene, abscisic acid (ABA), gibberellic acid (GA), and cytokinins (CK) during floral senescence are well-established. However, a comprehensive understanding of flower senescence at the molecular level is anticipated to elucidate the underlying mechanisms. While the role of ethylene is well-documented in ethylene-sensitive flower senescence, less is known about its role—or lack thereof—in ethylene-insensitive flowers, where hormones like ABA regulate this process. Several genes, transcription factors, and enzymes associated with ethylene- and ABA-mediated senescence have been identified. Interestingly, the targeted genetic manipulation of these components has potentially delayed flower senescence and extended flower longevity. Despite significant advances in understanding flower senescence, comprehensive studies on ethylene-sensitive and ethylene-insensitive species remain limited. In this context, the current review offers a detailed understanding of the physiological, biochemical, and molecular mechanisms orchestrating flower senescence. Besides, it emphasizes the intricate crosstalk among PGRs and other cellular processes that converge to initiate senescence and PCD in flowers. The review also highlights the importance of interdisciplinary approaches to further elucidate these mechanisms and proposes future research directions to advance the field. These insights are expected to facilitate the development of predictive models for PCD and senescence across various plant families and to propose novel strategies for enhancing the postharvest quality and longevity of cut flowers.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113299"},"PeriodicalIF":6.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659489","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}

{"title":"Phenylpropanoid pathway mediated the defense response of ‘Korla’ fragrant pear against Alternaria alternata infection","authors":"Tongrui Sun ,&nbsp;Wanting Yang ,&nbsp;Weida Zhang ,&nbsp;Yuxing Liu ,&nbsp;Lingling Li ,&nbsp;Shaobo Cheng ,&nbsp;Guogang Chen","doi":"10.1016/j.postharvbio.2024.113318","DOIUrl":"10.1016/j.postharvbio.2024.113318","url":null,"abstract":"<div><div><em>Alternaria alternata</em> has been found to be the dominating pathogenic fungus of harvested ‘Korla’ fragrant pear, and the resulting blackhead disease is a significant factor affecting the storage quality of pears. The present study explored the specific mechanisms by which the phenylpropanoid pathway mediates the defense response to <em>A. alternata</em> infection in pear fruit. In the <em>A. alternata-</em>inoculated group, the fruit exhibited increased activity and gene expression levels of key enzymes (PAL, C4H, and 4CL) as well as higher content of phenolic acids (<em>trans</em>-cinnamic acid, ferulic acid, caffeic acid, <em>p</em>-coumaric acid, and sinapic acid) and total phenol in the general phenylpropanoid pathway. In the mid-to-late storage period, the activity and gene expression levels of key enzymes in the lignin biosynthetic pathway (CCR and CAD) were suppressed, and the content of lignin monomers (sinapyl alcohol, coniferyl alcohol, and <em>p</em>-coumaryl alcohol) and lignin was reduced. Notably, the activity and gene expression levels of flavonoid biosynthetic pathway-related enzymes (CHS and CHI) as well as the content of various flavonoids (naringenin, apigenin, rutin, quercetin, and epicatechin) and total flavonoids continuously increased in response to <em>A. alternata</em> infection in the early to middle stages of storage but declined in the late storage period. In summary, the initial infection of <em>A. alternata</em> infection activated the stress response of pear fruit, particularly the phenylpropanoid–flavonoid branch pathway, to enhance the fruit’s defense against pathogens, but with the prolongation of the infestation time, the fruit could not continuously resist the invasion of pathogens, ultimately leading to the outbreak of disease. The present findings furnish a theoretical foundation further elucidating the interaction between ‘Korla’ fragrant pear and <em>A. alternata</em> and for developing an effective strategy to control the blackhead disease.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113318"},"PeriodicalIF":6.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659490","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}

{"title":"Hydrogen sulfide enhances the disease resistance of ginger to rhizome rot during postharvest storage through modulation of antioxidant response and nitric oxide-mediated S-nitrosylaion","authors":"Lingling Zhang ,&nbsp;Xiuqiao Wu ,&nbsp;Yue Zhong ,&nbsp;Ying Yang ,&nbsp;Shouhui Wei ,&nbsp;Chong Sun ,&nbsp;Lijuan Wei ,&nbsp;Yiqing Liu","doi":"10.1016/j.postharvbio.2024.113321","DOIUrl":"10.1016/j.postharvbio.2024.113321","url":null,"abstract":"<div><div>Postharvest pathogenic infestation leads to the quality deterioration in ginger industry. Hydrogen sulfide (H₂S), as an emerging potential postharvest protectant, could enhance disease resistance. This study investigated the antifungal role of H₂S against <em>Fusarium solani</em> during ginger postharvest storage. The results showed that H₂S restricted widespread infection by <em>F</em>. <em>solani</em> in gingers and have direct antimicrobial activity against <em>F</em>. <em>solani</em> in <em>vitro</em>, inhibiting mycelial growth and spore germination. H₂S improved endogenous H₂S accumulation, increased the activities of POD, CAT and SOD, and facilitated the removal of excess ROS. It also promoted the lignin, total phenolic and flavonoid contents, while boosting the activities of PAL, C4H and 4CL, and up-regulating the expression of <em>ZoPAL</em>, <em>ZoC4H</em> and <em>Zo4CL</em>. Moreover, H₂S increased endogenous NO levels through the NR and NOS pathways. Notably, the endogenous SNO content was increased, the GSNOR activity as well as expression of <em>GSNOR</em> were down-regulated by H₂S treatment. These effects were reversed by hypotaurine (HT), a scavenger of H₂S. Together, these results indicated that H₂S induces the disease resistance in postharvest ginger storage via enhancing antioxidant and defense capacity, regulating phenylpropane metabolism, inducing NO production and mediating NO-dependent <em>S</em>-nitrosylation modification. These results provide guidance for the application of H₂S during the storage of ginger.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113321"},"PeriodicalIF":6.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659555","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}

{"title":"Gypenoside GP5 effectively controls Colletotrichum gloeosporioides, an anthracnose fungus, by activating autophagy","authors":"Yujie Liu ,&nbsp;Xinyv Li ,&nbsp;Chu Gong ,&nbsp;Yonghong Cao ,&nbsp;Jun Wang ,&nbsp;Min Han ,&nbsp;Jun-Li Yang","doi":"10.1016/j.postharvbio.2024.113305","DOIUrl":"10.1016/j.postharvbio.2024.113305","url":null,"abstract":"<div><div>Anthracnose is a plant disease caused by <em>Colletotrichum spp</em>., known for its widespread infectivity and extreme destructiveness. <em>Colletotrichum gloeosporioides</em> is a representative pathogen of anthracnose in China. Gypenosides <strong>GP4</strong>-<strong>GP7</strong>, derived from <em>Gynostemma pentaphyllum</em> (Thunb.) Makino, could significantly inhibit the growth of <em>C. gloeosporioides</em> mycelial, with EC₅₀ values of 96.98, 27.5, 38.48, and 61.59 mg L⁻¹. The inhibitory effect of these compounds surpassed the commonly used chemical pesticide chlorothalonant and plant-derived pesticide matrine. Among them, the most active compound <strong>GP5</strong> also showed a significant inhibitory effect on spore germination and bud tube elongation of <em>C. gloeosporioides</em>. In addition, <strong>GP5</strong> could effectively suppress the spread of anthracnose spots in postharvest fruit. Transmission electron microscopy and fluorescence microscopy demonstrated that <strong>GP5</strong> primarily exerted its antifungal function by activating cellular autophagy. Additionally, proteomics analysis revealed that <strong>GP5</strong> had an antifungal effect against <em>C. gloeosporioides</em> by enhancing cellular autophagy through upregulation of the expression of the autophagy-related protein Atg8. This study presents a novel approach for the control and management of anthracnose in <em>C. gloeosporioides</em>. Consequently, <strong>GP5</strong> has the potential to be developed as a plant-derived fungicide for the biological control of anthracnose.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113305"},"PeriodicalIF":6.4,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659553","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}

{"title":"A comprehensive transcriptomic and metabolomic map reveals the molecular mechanism of persimmon fruit deastringency upon 40 °C warm water treatment","authors":"Yu Ding ,&nbsp;Xiaoxia Shen ,&nbsp;Yuduan Ding ,&nbsp;Pingxian Zhang ,&nbsp;Qinggang Zhu ,&nbsp;Yanbo Wang ,&nbsp;Qinglin Zhang ,&nbsp;Zhengrong Luo ,&nbsp;Yong Yang ,&nbsp;Xiaoyun Du ,&nbsp;Changfei Guan","doi":"10.1016/j.postharvbio.2024.113313","DOIUrl":"10.1016/j.postharvbio.2024.113313","url":null,"abstract":"<div><div>Persimmon (<em>Diospyros kaki</em> Thunb.) is a widely cultivated fruit crop. Predominantly, its pollination-constant astringent (PCA) cultivars that accumulate proanthocyanidins (PAs) during maturation, resulting in an astringent taste. In this study, twenty PCA-type cultivars were subjected to warm water treatment at five time points (0, 8, 16, 24, and 32 h). It revealed that astringency removal can be achieved in 19 cultivars, and 11 varies complete astringency removal within 16 h. To elucidate the underlying mechanism of deastringency, the cultivar of ‘Zheng 20’ persimmon fruit treated with 40 °C water was investigated, using a combined metabolomics and transcriptomics approach. A total of 48,937 high-quality unigenes were obtained through full-length RNA sequencing and functional annotation. Subsequently, transcriptome and metabolomic changes in persimmon fruit in response to warm water deastringency were analysis. Pathways associated with acetaldehyde metabolism, pectin synthesis and PA synthesis were identified. An interaction was observed between DkbZIP17 and DkWRKY3, which showed up-regulated gene expression in persimmon treated with warm water. Additionally, the overexpression of the <em>DkbZIP17</em> and <em>DkWRKY3</em> genes could promote soluble PA coagulation, and upregulate the acetaldehyde-related <em>DkADH</em>, <em>DkPDC</em> and <em>DkPK</em> genes in ‘Mopanshi’ persimmon leaves <em>in vivo</em>. Interestingly, simultaneous expression of <em>DkbZIP17</em> and <em>DkWRKY3</em> in persimmon leaves produced a synergistic effect that was more effective than the overexpression of a single gene. Overall, our results suggest that the <em>DkbZIP17</em> and <em>DkWRKY3</em> genes are involved in deastringency in persimmon fruit treated by 40 °C water via enhancement of acetaldehyde metabolism.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113313"},"PeriodicalIF":6.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659552","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}

{"title":"Transcriptomics integrated with metabolomics analysis of cold-induced lenticel disorder via the lignin pathway upon postharvest ‘Xinli No.7’ pear fruit","authors":"Ranran Xu ,&nbsp;Jiahua Zhou ,&nbsp;Lizhi Deng ,&nbsp;Shuaiqi Zhang ,&nbsp;John B. Golding ,&nbsp;Baogang Wang","doi":"10.1016/j.postharvbio.2024.113315","DOIUrl":"10.1016/j.postharvbio.2024.113315","url":null,"abstract":"<div><div>Pear fruit often suffer severe lenticel disorder in the peel during cold storage, affecting their appearance and commercial value. Pear (<em>Pyrus bretschneideri</em> Rehder cv. Xinli No.7) fruit were treated with ethylene or 1-methylcyclopropene and stored at 0 °C for 28 weeks (air treatment was used as a control). Observations revealed that the lenticels expanded and protruded, resulting rougher pear surface during storage. Furthermore, the occurrence of lenticel disorder was closely related to the lignin biosynthesis. Results from RNA-seq and weighted gene co-correlation network analysis showed a positive relationship among gene expression of lignin biosynthesis, plant hormone transduction, and the occurrence pattern of lenticel disorder. The results showed an increase in lignin biosynthesis through the upregulation of transcription factors and genes involved in the transduction of plant hormones, including ethylene and jasmonic acid. These results provide new insights into the mechanisms of lenticle disorder in ‘Xinli No.7’ pears under cold stress, and offer a theoretical basis for the maintenance of fruit quality during storage.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113315"},"PeriodicalIF":6.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659549","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}

{"title":"Comparative metabolome and transcriptome analyses reveal the role of MeJA in improving postharvest disease resistance and maintaining the quality of Rosa roxburghii fruit","authors":"Juan Ma ,&nbsp;Shuang Liu ,&nbsp;Jing Zeng ,&nbsp;Yiwen Zhang ,&nbsp;Wei Chang ,&nbsp;Zhengkun Meng ,&nbsp;Yujia Zhou ,&nbsp;Wene Zhang ,&nbsp;Xiaochun Ding ,&nbsp;Xuejun Pan ,&nbsp;Xuewu Duan","doi":"10.1016/j.postharvbio.2024.113314","DOIUrl":"10.1016/j.postharvbio.2024.113314","url":null,"abstract":"<div><div><em>Rosa roxburghii</em> has a short and concentrated harvest period, during which rapid decay and quality deterioration at room temperature pose significant challenges to the supply chain. To address this, we applied methyl jasmonate (MeJA) treatment and stored the fruit at low temperatures. MeJA treatment effectively reduced decay, maintained fruit firmness and brightness, suppressed respiration, and decreased malondialdehyde content. Further analysis revealed that MeJA reduced hydrogen peroxide levels by boosting the activities and gene expressions of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD). Additionally, MeJA upregulated the expression of disease resistance-related genes (<em>RrRGA3, RrPPO, RrCHIT, RrPRB1</em>, and <em>RrRPM1</em>). It also stimulated genes involved in the AsA synthesis and AsA-GSH cycle (<em>RrMIXO, RrAKRC9, RrDHAR</em>, and <em>RrGPX</em>), thereby increasing AsA content. Moreover, MeJA promoted the activities (PAL, C4H, and 4CL) and gene expressions (<em>RrPAL, Rr4CL, RrCSE, RrCCR, RrPGT, RrHCT</em>, <em>RrDFR</em> and <em>RrERF114</em>) of phenylpropane metabolism, resulting in increased levels of L-phenylalanine, caffeic acid, phlorizin, and other phenolic acids and lignin content. Furthermore, MeJA induced the expression of genes related to JA biosynthesis (<em>RrAOC, RrOPR</em>, and <em>RrACX</em>), and abscisic acid synthesis (<em>RrNCED</em>). In conclusion, these findings suggest that MeJA treatment enhances disease resistance and preserves the postharvest quality of <em>R. roxburghii</em>, making it a promising preservation method for large-scale commercial application in fruit storage.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113314"},"PeriodicalIF":6.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659550","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}

{"title":"Electron-beam generated X-ray irradiation treatment alleviates fruit-body softening of harvested Hericium erinaceus by regulating metabolisms of membrane lipid and cell wall","authors":"Yuanyuan Zhong ,&nbsp;Yuan Cui ,&nbsp;Jiangtao Yu ,&nbsp;Junqing Bai ,&nbsp;Huaide Xu ,&nbsp;Mei Li","doi":"10.1016/j.postharvbio.2024.113317","DOIUrl":"10.1016/j.postharvbio.2024.113317","url":null,"abstract":"<div><div>Fresh <em>Hericium erinaceus</em> is susceptible to softening after harvest, 1.0 kGy electron-beam generated X-ray (EBGX) irradiation could alleviate this phenomenon. To clarify the possible mechanism of EBGX regulated the softening of <em>H. erinaceus</em>, we explored its effects on membrane lipid and cell wall metabolism. Results showed that 1.0 kGy irradiation enhanced cell membrane stability, as evidenced by higher levels of phosphatidic acid, phosphatidylcholine, phosphatidylinositol, and the ratio of unsaturated fatty acids to saturated fatty acids (U/S), whereas lower levels of ROS, lipoxygenase, phospholipase D, and lipase activities compared to the control. More importantly, 1.0 kGy-treated samples exhibited a minimum of chitinase (4.12 U mg⁻¹), cellulase (16.34 U mg⁻¹), β-glucanase (13.28 U mg⁻¹), and PAL (10.17 U mg⁻¹) activities at 9d, but retained higher chitin, cellulose, β-glucan, and lignin contents, thus suppressed the disassembly of cell wall structure. Utilizing comparative transcriptomic data, the differentially expressed genes (DEGs) from starch and sucrose metabolism, amino sugar and nucleotide sugar metabolism, and lipid degradation metabolism were related to softening in <em>H. erinaceus</em> with control or irradiation treatments. Additionally, the relative abundance of DEGs-related transcripts like <em>HeLOX</em>, <em>HePLD</em>, <em>HeLPS</em>, <em>HeCHI</em>, <em>HeCEL</em>, <em>HeGLU1</em>, <em>HeGLU2</em>, and <em>HePAL</em> were prominently downregulated in the irradiation treatment. Overall, 1.0 kGy EBGX irradiation could retard the postharvest softening process of <em>H. erinaceus</em> by regulating the gene expression of membrane lipids and cell wall metabolic pathways.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113317"},"PeriodicalIF":6.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659551","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}

{"title":"Methyl jasmonate attenuates chilling injury of prune fruit by maintaining ROS homeostasis and regulating GABA metabolism and energy status","authors":"Yating Zhao ,&nbsp;Yingjie Wu ,&nbsp;Xuan Zhang ,&nbsp;Xuan Zhu ,&nbsp;Yuanyuan Hou ,&nbsp;Jianye Chen ,&nbsp;Kuanbo Cui ,&nbsp;Xuewen Li ,&nbsp;Wenxin Wu","doi":"10.1016/j.postharvbio.2024.113303","DOIUrl":"10.1016/j.postharvbio.2024.113303","url":null,"abstract":"<div><div>Cold storage is an important means to prolong the storage life of postharvest fruits. However, prunes are prone to chilling injury (CI) at low temperatures, which in turn reduces their marketability. In this study, methyl jasmonate (MeJA) effectively inhibited the occurrence of CI, and reduced internal browning index and electrolyte leakage of prune fruit under low temperature (1 ± 1 °C), with the most significant inhibitory effect observed at the concentration of 10 μM. Also, MeJA alleviated the overproduction of reactive oxygen species (ROS) by promoting the activity of antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase) and the expression level of their coding genes, thereby maintaining the integrity of the mitochondrial structure of prune fruit. Moreover, MeJA maintained higher content of γ-aminobutyric acid (GABA) through stimulating glutamate decarboxylase activity and retained higher energy levels by promoting the activity of succinate dehydrogenase, cytochrome C oxidase, H⁺-ATPase, Ca²⁺-ATPase, GABA transaminase, and succinic semialdehyde dehydrogenase and expression level of the corresponding gene of prune fruit. Our findings not only shed light on the inhibitory effect of MeJA on CI of prune fruit from the perspective of reducing ROS-induced oxidative damage to maintain mitochondrial structure, activating GABA shunt, and maintaining energy supply but also provide means of alleviating CI of prune fruit during postharvest storage.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113303"},"PeriodicalIF":6.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659548","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}

{"title":"Optimizing aflatoxin B1 detection in peanut kernels through deep modular combination optimization algorithm: A deep learning approach to quality evaluation of postharvest nuts","authors":"Zhen Guo ,&nbsp;Haifang Wang ,&nbsp;Haowei Dong ,&nbsp;Lianming Xia ,&nbsp;Ibrahim A. Darwish ,&nbsp;Yemin Guo ,&nbsp;Xia Sun","doi":"10.1016/j.postharvbio.2024.113293","DOIUrl":"10.1016/j.postharvbio.2024.113293","url":null,"abstract":"<div><div>Aflatoxin B₁ (AFB₁) is considered one of the most potent natural carcinogens. Quantitative detection of AFB₁ is essential for quality evaluation of postharvest nuts. In this study, a deep modular combination optimization (DMCO) algorithm was proposed to detect the content of AFB₁ in peanut kernels contaminated with <em>Aspergillus flavus</em>. The DMCO algorithm constituted a groundbreaking approach in the realm of deep learning for hyperspectral imaging analysis which meticulously selected and modularized existing deep learning models. It was characterized by the flexibility of combining these modules in serial configurations, parallel configurations or more complex configurations. This innovative architecture facilitated the capture of complex features, leading to improved predictive performance over single-module models. A performance-based selection mechanism was included in DMCO algorithm, which determined the most effective model architectures from a multitude of permutations. The optimal module combination reached a coefficient of determination for validation of 0.879, with root mean square error for validation and mean absolute error for validation recorded at 1.269 and 0.945, respectively. The DMCO algorithm successfully leverages deep learning to enhance the accuracy of AFB₁ detection in peanut kernels, showing its potential as a powerful tool to assess safety and quality for postharvest nuts.</div></div>","PeriodicalId":20328,"journal":{"name":"Postharvest Biology and Technology","volume":"220 ","pages":"Article 113293"},"PeriodicalIF":6.4,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659545","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}