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Meng Q, Feng S, Tan T, Wen Q, Shang J. Fast detection of moisture content and freshness for loquats using optical fiber spectroscopy. Food Sci Nutr 2024; 12:4819-4830. [PMID: 39055228 PMCID: PMC11266933 DOI: 10.1002/fsn3.4130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 03/07/2024] [Accepted: 03/13/2024] [Indexed: 07/27/2024] Open
Abstract
Detection of the moisture content (MC) and freshness for loquats is crucial for achieving optimal taste and economic efficiency. Traditional methods for evaluating the MC and freshness of loquats have disadvantages such as destructive sampling and time-consuming. To investigate the feasibility of rapid and non-destructive detection of the MC and freshness for loquats, optical fiber spectroscopy in the range of 200-1000 nm was used in this study. The full spectra were pre-processed using standard normal variate method, and then, the effective wavelengths were selected using competitive adaptive weighting sampling (CARS) and random frog algorithms. Based on the selected effective wavelengths, prediction models for MC were developed using partial least squares regression (PLSR), multiple linear regression, extreme learning machine, and back-propagation neural network. Furthermore, freshness level discrimination models were established using simplified k nearest neighbor, support vector machine (SVM), and partial least squares discriminant analysis. Regarding the prediction models, the CARS-PLSR model performed relatively better than the other models for predicting the MC, with R 2 P and RPD values of 0.84 and 2.51, respectively. Additionally, the CARS-SVM model obtained superior discrimination performance, with 100% accuracy for both calibration and prediction sets. The results demonstrated that optical fiber spectroscopy technology is an effective tool to fast detect the MC and freshness for loquats.
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Affiliation(s)
- Qinglong Meng
- School of Food Science and EngineeringGuiyang UniversityGuiyangChina
- Research Center of Nondestructive Testing for Agricultural Products of Guizhou ProvinceGuiyangChina
| | - Shunan Feng
- School of Food Science and EngineeringGuiyang UniversityGuiyangChina
| | - Tao Tan
- School of Food Science and EngineeringGuiyang UniversityGuiyangChina
| | - Qingchun Wen
- School of Food Science and EngineeringGuiyang UniversityGuiyangChina
| | - Jing Shang
- School of Food Science and EngineeringGuiyang UniversityGuiyangChina
- Research Center of Nondestructive Testing for Agricultural Products of Guizhou ProvinceGuiyangChina
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Pal S, Das A, Sarkar B, Hasanuzzaman M, Adak MK. Modulation of secondary metabolism and redox regulation by exogenously applied glutathione improves the shelf life of Capsicum annuum L. fruit. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 212:108789. [PMID: 38850727 DOI: 10.1016/j.plaphy.2024.108789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/18/2024] [Accepted: 05/30/2024] [Indexed: 06/10/2024]
Abstract
Role of redox homeostasis in fruit ripening of Capsicum annuum L. with oxidative metabolism was studied. The research aims the ability to reduce agents during postharvest storage on fruit for delayed ripening with the regulation of oxidative stress. Thus, we applied 10 mM reduced glutathione (GSH) to fruit as pretreatment followed by 1 mM hydrogen peroxide (H2O2) as ripening-inducing treatment and observed during 7 days of storage at 25 °C. A decrease in total soluble solid and firmness under H2O2, was increased while dehydration in tissue was decreased by GSH pretreatment. Glutathione regulated the turnover of organic acids to reducing sugars with higher activity of NADP malic enzyme that sustained the fruit coat photosynthesis through chlorophyll fluorescence, pigment composition, and photosystem II activity. Malondialdehyde accumulation was inversely correlated with GSH content and antioxidative enzyme activity that reduced loss of cell viability. Conclusively, regulation of oxidative stress with GSH may be effective in the extension of shelf life under postharvest storage.
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Affiliation(s)
- Sayan Pal
- Plant Physiology and Molecular Biology Research Unit, Department of Botany, University of Kalyani, Kalyani, 741235, West Bengal, India
| | - Abir Das
- Plant Physiology and Molecular Biology Research Unit, Department of Botany, University of Kalyani, Kalyani, 741235, West Bengal, India
| | - Bipul Sarkar
- Plant Physiology and Molecular Biology Research Unit, Department of Botany, University of Kalyani, Kalyani, 741235, West Bengal, India
| | - Mirza Hasanuzzaman
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea.
| | - Malay Kumar Adak
- Plant Physiology and Molecular Biology Research Unit, Department of Botany, University of Kalyani, Kalyani, 741235, West Bengal, India.
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Qiao M, Xiong H, Cai X, Jiang Y, Zhao X, Miao B. Evaluation of Loquat Jam Quality at Different Cooking Times Based on Physicochemical Parameters, GC-IMS and Intelligent Senses. Foods 2024; 13:340. [PMID: 38275707 PMCID: PMC10815106 DOI: 10.3390/foods13020340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/09/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
The study compared and analyzed the quality of loquat jam with different cooking times through physicochemical parameters, headspace-gas chromatography-ion migration spectroscopy (HS-GC-IMS) and intelligent senses. The results showed that with the prolongation of the cooking time, the color of loquat jam slowly deepened, the energy significantly increased, the adhesiveness, gumminess, hardness and chewiness enhanced, the free amino acid content increased from 22.40 to 65.18 mg/g. The organic acid content increased from 1.64 to 9.82 mg/g. Forty-seven volatile flavor compounds were identified in five types of loquat jam using HS-GC-IMS, among which the relative content of aldehydes was sharply higher than that of other chemical substances, playing an important role in the flavor formation of loquat jam. LJ0, LJ1 and LJ2 had higher aldehyde content, followed by LJ3 and LJ4 had the lowest aldehyde content. The orthogonal partial least squares-discriminant analysis (OPLS-DA) screened 15 marker compounds that could distinguish five types of loquat jam. The E-nose results showed a significant difference in olfactory sense between loquat jam cooked for 100 and 120 min. The E-tongue results corroborated the results of free amino acids (FAAs) and organic acids, indicating that the gustatory sense of loquat jam changed significantly when the cooking time reached 120 min. The results provided a basis for further research on the relationship between the cooking process and quality characteristics of loquat jam.
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Affiliation(s)
- Mingfeng Qiao
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu National Agricultural Science & Technology Center, Chengdu 610213, China; (M.Q.); (Y.J.); (X.Z.)
- Culinary Science Key Laboratory of Sichuan Province, Sichuan Tourism University, Chengdu 610100, China; (H.X.); (X.C.)
| | - Huan Xiong
- Culinary Science Key Laboratory of Sichuan Province, Sichuan Tourism University, Chengdu 610100, China; (H.X.); (X.C.)
- College of Life Science, Dalian Minzu University, Dalian 116600, China
| | - Xuemei Cai
- Culinary Science Key Laboratory of Sichuan Province, Sichuan Tourism University, Chengdu 610100, China; (H.X.); (X.C.)
| | - Yuqin Jiang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu National Agricultural Science & Technology Center, Chengdu 610213, China; (M.Q.); (Y.J.); (X.Z.)
| | - Xinxin Zhao
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu National Agricultural Science & Technology Center, Chengdu 610213, China; (M.Q.); (Y.J.); (X.Z.)
| | - Baohe Miao
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu National Agricultural Science & Technology Center, Chengdu 610213, China; (M.Q.); (Y.J.); (X.Z.)
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Zhang K, Zhou J, Song P, Li X, Peng X, Huang Y, Ma Q, Liang D, Deng Q. Dynamic Changes of Phenolic Composition, Antioxidant Capacity, and Gene Expression in 'Snow White' Loquat ( Eriobotrya japonica Lindl.) Fruit throughout Development and Ripening. Int J Mol Sci 2023; 25:80. [PMID: 38203258 PMCID: PMC10779426 DOI: 10.3390/ijms25010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/15/2023] [Accepted: 12/16/2023] [Indexed: 01/12/2024] Open
Abstract
The newly released 'Snow White' (SW), a white-fleshed loquat (Eriobotrya japonica Lindl.) cultivar, holds promise for commercial production. However, the specifics of the phenolic composition in white-fleshed loquats, along with the antioxidant substances and their regulatory mechanisms, are not yet fully understood. In this study, we examined the dynamic changes in the phenolic compounds, enzyme activities, antioxidant capacity, and gene expression patterns of SW during the key stages of fruit development and ripening. A total of 18 phenolic compounds were identified in SW, with chlorogenic acid, neochlorogenic acid, and coniferyl alcohol being the most predominant. SW demonstrated a stronger antioxidant capacity in the early stages of development, largely due to total phenolics and flavonoids. Neochlorogenic acid may be the most significant antioxidant contributor in loquat. A decline in enzyme activities corresponded with fruit softening. Different genes within a multigene family played distinct roles in the synthesis of phenolics. C4H1, 4CL2, 4CL9, HCT, CCoAOMT5, F5H, COMT1, CAD6, and POD42 were implicated in the regulation of neochlorogenic acid synthesis and accumulation. Consequently, these findings enhance our understanding of phenolic metabolism and offer fresh perspectives on the development of germplasm resources for white-fleshed loquats.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Qunxian Deng
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; (K.Z.); (J.Z.); (P.S.); (X.L.); (X.P.); (Y.H.); (Q.M.); (D.L.)
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Yan QJ, Chen YY, Wu MX, Yang H, Cao JP, Sun CD, Wang Y. Phenolics and Terpenoids Profiling in Diverse Loquat Fruit Varieties and Systematic Assessment of Their Mitigation of Alcohol-Induced Oxidative Stress. Antioxidants (Basel) 2023; 12:1795. [PMID: 37891875 PMCID: PMC10604257 DOI: 10.3390/antiox12101795] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 10/29/2023] Open
Abstract
To compare and investigate the phenolic compounds in the peel and flesh of loquat (Eriobotrya japonica) and evaluate their ability to protect against alcohol-induced liver oxidative stress, we employed a combination of ultra-performance liquid chromatography (UPLC) and high-resolution mass spectrometry (HRMS) to qualitatively and quantitatively analyze 22 phenolics and 2 terpenoid compounds in loquat peel and flesh extracts (extraction with 95% ethanol). Among these, six compounds were identified for the first time in loquat, revealing distinct distribution patterns based on variety and tissue. Various chemical models, such as DPPH, FRAP, ORAC, and ABTS, were used to assess free radical scavenging and metal ion reduction capabilities. The results indicate that peel extracts exhibited higher antioxidant capacity compared with flesh extracts. Using a normal mouse liver cell line, AML-12, we explored the protective effects of loquat extracts and individual compounds against ethanol-induced oxidative stress. The findings demonstrate the enhanced cell viability and the induction of antioxidant enzyme activity through the modulation of Nrf2 and Keap1 gene expression. In a C57/BL6 mouse model of alcohol-induced liver damage, loquat extract was found to alleviate liver injury induced by alcohol. The restoration of perturbed serum liver health indicators underscored the efficacy of loquat extract in reclaiming equilibrium. The culmination of these findings significantly bolsters the foundational knowledge necessary to explore the utilization of loquat fruit extract in the creation of health-focused products.
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Affiliation(s)
- Qun-Jiao Yan
- Institute of Health Service and Transfusion Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100000, China;
| | - Yun-Yi Chen
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310000, China; (Y.-Y.C.); (M.-X.W.); (H.Y.); (J.-P.C.); (C.-D.S.)
| | - Man-Xi Wu
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310000, China; (Y.-Y.C.); (M.-X.W.); (H.Y.); (J.-P.C.); (C.-D.S.)
| | - Han Yang
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310000, China; (Y.-Y.C.); (M.-X.W.); (H.Y.); (J.-P.C.); (C.-D.S.)
| | - Jin-Ping Cao
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310000, China; (Y.-Y.C.); (M.-X.W.); (H.Y.); (J.-P.C.); (C.-D.S.)
| | - Chong-De Sun
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310000, China; (Y.-Y.C.); (M.-X.W.); (H.Y.); (J.-P.C.); (C.-D.S.)
| | - Yue Wang
- Laboratory of Fruit Quality Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310000, China; (Y.-Y.C.); (M.-X.W.); (H.Y.); (J.-P.C.); (C.-D.S.)
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