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Wang Q, Li X, Hao J, Xu D. Stability mechanism of Monascus pigment-soy protein isolate-maltodextrin complex. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:7173-7181. [PMID: 38619243 DOI: 10.1002/jsfa.13539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 03/29/2024] [Accepted: 04/15/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND Monascus pigment (MP) is a natural food coloring with vital physiological functions but prone to degradation and color fading under light conditions. RESULTS This study investigated the effect of complex formation of soybean protein isolate (SPI), maltodextrin (MD), and MP on the photostability of MP. Light stability was assessed through retention rate and color difference. Fluorescence spectroscopy (FS), circular dichroism (CD), Fourier-transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) explored MP, SPI, and MD interactions, clarifying the MP-SPI-MD complex mechanism on the light stability of MP. Microstructure and differential scanning calorimetry (DSC) analyzed the morphology and thermal properties. The retention rate of MP increased to approximately 80%, and minimal color difference was observed when adding SPI and MD simultaneously. FS revealed hydrophobic interaction between MP and SPI. FTIR analysis showed intensity changes and peak shifts in amide I band and amide II band, which proved the hydrophobic interaction. CD showed a decrease in α-helix content and an increase in β-sheet content after complex formation, indicating strengthened hydrogen bonding interactions. Scanning electron microscopy (SEM) analysis demonstrated that MP was attached to the surface and interior of complexes. XRD showed MP as crystalline, while SPI and MD were amorphous, complexes exhibited weakened or absent peaks, suggesting MP encapsulation. The results of DSC were consistent with XRD. CONCLUSION SPI and MD enveloped MP through hydrogen bonding and hydrophobic interaction, ultimately enhancing its light stability and providing insights for pigment-protein-polysaccharide interactions and improving pigment stability in the food industry. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Qiuyu Wang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, China
| | - Xiaoyu Li
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, China
| | - Jia Hao
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, China
| | - Duoxia Xu
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, China
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Gawborisut S, Muengkratok S. Red Yeast Rice and Optimal Fermentation Periods Improve the Quality of Esan Fermented Fish Sausage. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2024; 2024:4831279. [PMID: 38571769 PMCID: PMC10990633 DOI: 10.1155/2024/4831279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/02/2024] [Accepted: 03/05/2024] [Indexed: 04/05/2024]
Abstract
Esan fermented fish sausage (EFFS) has an unappealing off-white color. The incorporation of an appropriate amount of red yeast rice (RYR) and the selection of an optimal fermentation period may yield visually appealing, high-quality sausages. This study is aimed at investigating the effects of different RYR levels (0, 0.35, and 0.7%) and fermentation periods (0, 2, 4, and 6 days) on the quality parameters of EFFS. The following parameters were examined for raw EFFS: CIE color values (L∗, a∗, and b∗), microbial analyses (total viable count, lactic acid bacteria, and yeast and mold counts), titratable acidity (TA), pH, weight loss, cooking loss, texture profile analysis (TPA), and sensory evaluation (color, odor, hand-feel texture, overall acceptability, and overall preference ranking). The quality parameters of the cooked EFFS were CIE color values and sensory evaluation (color, odor, mouthfeel, texture, flavor, overall acceptability, and overall preference ranking). The results showed that 0.35 and 0.7% RYR increased the a∗ (red/green) values of raw and cooked EFFS but decreased the L∗ (lightness) and b∗ (yellow/blue) values. These RYR levels significantly improved the sensory color, overall acceptability, and overall preference ranking of the raw and cooked EFFSs. However, no statistical differences were observed between the effects of 0.35 and 0.7% RYR. RYR levels did not affect the microbial analyses, TA, pH, weight loss, cooking loss, or TPA. Moreover, they had no effect on the odor and hand-feel texture of raw EFFS, or the odor, mouthfeel texture, or flavor of cooked EFFS. Therefore, RYR supplementation improved the color quality of the EFFSs without altering the other quality parameters, with 0.35% RYR deemed optimal. Moreover, the fermentation period significantly influenced most quality parameters, except CIE color values and sensory color perception of raw and cooked EFFSs. Most sensory parameters improved by day 2, remained unchanged until day 4, and then deteriorated on day 6.
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Affiliation(s)
- Somsamorn Gawborisut
- Fish Processing Laboratory, Department of Fisheries, Khon Kaen University, 123 Mittraphap Rd., Khon Kaen 40002, Thailand
| | - Suprawee Muengkratok
- Fish Processing Laboratory, Department of Fisheries, Khon Kaen University, 123 Mittraphap Rd., Khon Kaen 40002, Thailand
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Micheal HSR, Thyagarajan D, Govindaraj M, Saravanakumar VK, Mohammed NB, Murugasamy Maheswari K. Biosorption of halophilic fungal melanized membrane - PUR/melanin polymer for heavy metal detoxification with electrospinning technology. ENVIRONMENTAL TECHNOLOGY 2024:1-13. [PMID: 38286341 DOI: 10.1080/09593330.2024.2310034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 01/03/2024] [Indexed: 01/31/2024]
Abstract
Eradication of heavy metal pollution has become the prime priority over the conservation of water resources in the upcoming era. Herein, the study involved the halophilic fungal melanin from Curvularia lunata showed a promising biosorbent for the removal of toxic heavy metals which shows eco-friendly, cost-effective, high stability, and adsorbent efficiency. Polyurethane blended with fungal melanin polymers, makes polymeric nanofibrous membranes through electrospinning techniques. BET isotherms revealed the raw fungal melanin holds a surface area of 3.54 m2/g exhibiting type IV isotherms. BJH results in a total pore volume of 5.79 cc/g with a pore diameter of 6.54 ± 1 nm for pores smaller than 4544.8 Å. Exhibits Eumelanin properties were characterized by FE - SEM and FTIR functional elements. ICPMS confirmed the metal adsorption proficiency on both raw and melanized membranes before and after treatments. Over 17 heavy metals, Ni2+ were adsorbed with 100% efficiency by raw melanin alone with 42.48 µg/L of Ni2+ concentration in the water sample, whereas, Cu2+, Zn2+, Co2+, Cr2+, Pb2+, Mn2+, Al3+, Mo6+, Sb3+, Ba2+, Fe2+, and Mg2+ stands next with 99%. In this study, gentle/simple application of raw fungal melanin (without PUR tailored) can detoxify the maximum concentration of heavy metals present in the water bodies which are further used for irrigation and even drinking purposes. This mycoremediation approach can be easily adapted to industrial production than other high-performance membrane materials with minimal process modification, making it a promising strategy for improving the adsorption properties used in various applications after still furthermore investigation.
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Affiliation(s)
| | | | - Mageswari Govindaraj
- Department of Biotechnology, Sri Ramakrishna College of Arts & Science, Coimbatore, India
| | | | - Nazneen Bobby Mohammed
- Department of Biotechnology, Vignan's Foundation for Science Technology and Research, Vadlamudi, India
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Alananbeh KM, Alkfoof R, Muhaidat R, Massadeh M. Production of Xylanase by Trichoderma Species Growing on Olive Mill Pomace and Barley Bran in a Packed-Bed Bioreactor. J Fungi (Basel) 2024; 10:49. [PMID: 38248958 PMCID: PMC10817328 DOI: 10.3390/jof10010049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 12/27/2023] [Accepted: 12/29/2023] [Indexed: 01/23/2024] Open
Abstract
Xylanases are hydrolytic enzymes that have tremendous applications in different sectors of life, but the high cost of their production has limited their use. One solution to reduce costs and enhance xylanase production is the use of agro-wastes as a substrate in fungal cultures. In this study, olive mill pomace (OMP) and barley bran (BB) were used as carbon sources and possible inducers of xylanase production by three species of Trichoderma (atroviride, harzianum, and longibrachiatum), one major xylanase producer. The experiments were conducted under a solid-state fermentation system (SSF) in flask cultures and a packed-bed bioreactor. Cultures of OMP and BB were optimized by examining different ratios of OMP and BB, varied particle sizes, and inoculum size for the three species of Trichoderma. The ratio of 8:2 OMP and BB yielded the highest xylanase activity, with a particle size of 1 mm at 29 °C and an inoculum size of 1 × 107 spores/mL. Studying the time profile of the process revealed that xylanase activity was highest after seven days of incubation in flask SSF cultures (1.779 U/mL) and after three days in a packed-bed bioreactor (1.828 U/mL). The maximum percentage of OMP degradation recorded was about 15% in the cultures of T. harzianum flask SSF cultures, compared to about 11% in T. longibrachiatum bioreactor cultures. Ammonium sulfate precipitation and dialysis experiments showed that Xylane enzyme activity ranged from 0.274 U/mL in T. harzianum to 0.837 U/mL in T. atroviride when crude extract was used, with the highest activity (0.628 U/mL) at 60% saturation. Xylose was the main sugar released in all purified fractions, with the G-50 and G-75 fractions showing the maximum units of xylanase.
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Affiliation(s)
- Kholoud M. Alananbeh
- Department of Plant Protection, School of Agriculture, The University of Jordan, Amman 11942, Jordan
| | - Rana Alkfoof
- Department of Biological Sciences, Faculty of Science, Yarmouk University, Irbid P.O. Box 21163, Jordan; (R.A.); (R.M.)
| | - Riyadh Muhaidat
- Department of Biological Sciences, Faculty of Science, Yarmouk University, Irbid P.O. Box 21163, Jordan; (R.A.); (R.M.)
| | - Muhannad Massadeh
- Department of Biology and Biotechnology, Faculty of Science, The Hashemite University, Zarqa P.O. Box 11315, Jordan
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Wei M, Zhu J, Gao H, Yao H, Zhai C, Nie Y. An efficient method for improving the stability of Monascus pigments using ionic gelation. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:6190-6197. [PMID: 37139630 DOI: 10.1002/jsfa.12685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/24/2023] [Accepted: 05/02/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Monascus pigments (Mps) are easily impacted by heating, pH and light, resulting in degradation. In this study, Mps were encapsulated by the ionic gelation method with sodium alginate (SA) and sodium caseinate (SC), as well as CaCl2 as a crosslinker. The encapsulated Mps SA/SC in four proportions (SA/SC: 1/4, 2/3, 3/2, 4/1, w/w). Then, the encapsulation efficiency and particle size of the SA/SC-Mps system were evaluated to obtain the optimal embedding conditions. Finally, the effects of heating, pH, light and storage on the stability of non-capsulated Mps and encapsulated Mps were assessed. RESULTS SA/SC = 2/3 (AC2) had higher encapsulation efficiency (74.30%) of Mps and relatively small particle size (2.02 mm). The AC2 gel beads were chosen for further investigating the stability of encapsulated Mps to heating, pH, light and storage. Heat stability experiments showed that the degradation of Mps followed first-order kinetics, and the encapsulated Mps had lower degradation rates than non-capsulated Mps. Encapsulation could reduce the effect of pH on Mps. The effects of ultraviolet light on the stability of Mps were considered, and showed that the retention efficiency of encapsulated Mps was 22.01% higher than that of non-capsulated Mps on the seventh day. Finally, storage stability was also evaluated under dark refrigerated conditions for 30 days, and the results indicated that encapsulation could reduce the degradation of Mps. CONCLUSION This study has proved that AC2 gel beads can improve the stability of Mps. Thus, the ionic gelation method is a promising encapsulation method to improve the stability of Mps. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Mengru Wei
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, China
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, China
| | - Jingjing Zhu
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, China
| | - Hongshuai Gao
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, China
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Huanhuan Yao
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, China
| | - Cuiping Zhai
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng, China
| | - Yi Nie
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, China
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
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Shi P, Luo H, Huang Q, Xu C, Tong X, Shen H, Su H, Pu H, Wang H, Yu L, Li H. Extraction and characterisation of pigment from Yanzhiguo [ Prunus napaulensis (Ser.) Steud.]. PeerJ 2023; 11:e15517. [PMID: 37547716 PMCID: PMC10402702 DOI: 10.7717/peerj.15517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/15/2023] [Indexed: 08/08/2023] Open
Abstract
Yanzhiguo [Prunus napaulensis (Ser.) Steud] belongs to Rosaceae family and is consumed as wild fruit, pulp and juice. However, its potential for extracting natural pigment has not yet been explored. Herein, the components in the fresh Yanzhiguo pulp were preliminarily analyzed by liquid chromatography coupled to mass spectrometry. And, the optimal pre-treatment conditions were established for further extraction of Yanzhiguo pigment based on the a* value. Then, by combining the data from single-factor experiments and response surface methodology, the optimal extraction process was established as: 35% EtOH, a liquid-solid ratio of 200:1 mL g-1, an extraction time of 65 min, and an extraction temperature of 100 °C. Moreover, it was found that the a* value and yield had high fitness except when extracted into ethanol (EtOH) with different concentrations. Meanwhile, our result demonstrated Yanzhiguo pigment had high stability in general environments with carmine (a synthetic pigment) as control, except for extreme environments such as direct (hot) sunlight, high temperature (75 °C) and strong alkaline (pH ≥ 11). Also, Yanzhiguo pigment exhibited good antioxidant activity. Our results contribute to more information on Yanzhiguo pigment and promote its application by providing efficient extraction technology.
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Affiliation(s)
- Pingping Shi
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Haibo Luo
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu, China
| | - Qiuqiu Huang
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Changliang Xu
- Agricultural and Animal Products Quality Testing Center, Suqian, Jiangsu, China
| | - Xiuzi Tong
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu, China
| | - Hui Shen
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Huosheng Su
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Hongmei Pu
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Haidan Wang
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Lijuan Yu
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Hong Li
- Agro-products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
- Yunnan Agricultural University, Kunming, Yunnan, China
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Olukanni OD, Abiola T, Dada JB, Dare PA, Ayoade F, Olukanni AT. Resourcefulness of propylprodigiosin isolated from Brevundimonas olei strain RUN-D1. AMB Express 2023; 13:71. [PMID: 37422847 DOI: 10.1186/s13568-023-01579-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 06/29/2023] [Indexed: 07/11/2023] Open
Abstract
A novel red-pigmented bacterium was isolated from a water sample collected at Osun River, Ede. Morphological and 16 S rRNA gene sequencing revealed that the bacterium is a strain of Brevundimonas olei, while its red pigment was identified using UV-visible, FTIR and GCMS as a derivative of propylprodigiosin. The maximum absorbance of 534 nm, the FTIR's 1344 cm- 1 peak of prodigiosin's methoxyl C-O interaction, and the molecular ions from GCMS confirmed the pigment's identity. The pigments production was temperature-sensitive (25 °C), lost at > 28 °C, and in the presence of urea and humus. In addition, the pigment turned pink in the presence of hydrocarbons, while its red colour was retained with KCN and Fe2SO4, and enhanced by methylparaben. Furthermore, the pigment is stable in high temperature, salt, and acidic conditions, but changed to yellow in alkaline solution. The pigment, identified as propylprodigiosin (m/z 297), demonstrated broad-spectrum antibacterial activities against clinically important strains of Staphylococcus aureus (ATCC25923), Pseudomonas aeruginosa (ATCC9077), Bacillus cereus (ATCC10876), Salmonella typhi (ATCC13311), and Escherichia coli (DSM10974). The ethanol extract has the highest zones of inhibition of 29 ± 3.0, 26 ± 1.2, 22 ± 3.0, 22 ± 1.5, and 20 ± 2.0 mm, respectively. Furthermore, the acetone pigments interacted with cellulose and glucose such that increasing glucose concentrations showed linearity at 425 nm. Finally, the fastness of the pigments to fabrics was excellent, with percentage fadedness of 0 and - 43% light and washing tests, respectively, in the presence of Fe2SO4 as the mordant. The antibacterial nature of prodigiosin solutions and their good textile fastness to fabrics could be essential in manufacturing antiseptic materials such as bandages, hospital clothing and agricultural applications such as tubers preservation.Key points.
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Affiliation(s)
- Olumide D Olukanni
- Department of Biochemistry, Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria.
- African Centre of Excellence for Water and Environmental Research (ACEWATER), Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria.
| | - Temitope Abiola
- Department of Biochemistry, Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
- African Centre of Excellence for Water and Environmental Research (ACEWATER), Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
| | - Jonathan B Dada
- Department of Biochemistry, Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
| | - Peter A Dare
- African Centre of Excellence for Water and Environmental Research (ACEWATER), Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
- Department of Biological Sciences, Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
| | - Femi Ayoade
- Department of Biological Sciences, Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
| | - Adedayo T Olukanni
- Department of Biochemistry, Redeemer's University, PMB 230 Ede, Ede, Osun, Nigeria
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Li M, He P, Zhao Z, Liu J, Liu H, Ma S, Shen Y, Li B. Effect of temperature on betacyanins synthesis and the transcriptome of Suaeda salsa. FRONTIERS IN PLANT SCIENCE 2023; 14:1203089. [PMID: 37434603 PMCID: PMC10330703 DOI: 10.3389/fpls.2023.1203089] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/02/2023] [Indexed: 07/13/2023]
Abstract
Introduction Suaeda salsa (Linn.) Pall. is an important tourist resource and ecological restoration species in coastal wetlands. Environmental factors such as low temperature, darkness, phytohormone, salt stress and seawater flflooding, and light can induce betalain synthesis in S. salsa, which plays an important role in plant adaptation to abiotic stress processes and in shaping the beautiful "red beach" landscape. Methods In this study, Illumina sequencing was used to profifile the transcriptome sequence (RNA-Seq) of S. salsa leaves at different temperatures (5° C, 10°C, 15°C, 20°C, 25°C, and 30°C) and to validate differentially expressed genes (DEGs) indicated by real-time PCR (RT-qPCR). Results The betacyanin content was highest in S. salsa leaves at 15°C. Transcription group data showed that compared to the control group (15°C), the "betacyanin biosynthesis pathway" was signifificantly enriched in the fifive different temperature groups. KEGG analysis showed that the DEGs were mainly involved in pathways of phenylpropanoid biosynthesis, carbon fifixation in photosynthetic organisms, flflavonoid biosynthesis, and betacyanin biosynthesis. Among the key enzymes involved in biosynthesis of betacyanin, genes for tyrosinase, CYP76AD1 and 4,5-DOPA dioxygenase were signifificantly upregulated and most abundantly expressed at 15°C. It is possible that the gene for betacyanin synthesis from S. salsa is primarily regulated by the MYB1R1 and MYB1 transcription factor. Four DEGs were randomly selected for quantitative PCR analysis, and DEG expression was generally consistent with the RNA-Seq data, verifying the validity of the transcriptome sequencing data. Discussion Relative to other temperatures, 15°C was optimum for S. salsa betacyanin synthesis, and this provides a theoretical reference for coastal wetland ecological remediation, reveals mechanisms of S. salsa discoloration, and further mines its potential application for landscape vegetation.
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Affiliation(s)
- Min Li
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
| | - Peimin He
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
- Engineering Research Center for Water Environment Ecology in Shanghai, Shanghai, China
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, China
| | - Zitao Zhao
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
| | - Jinlin Liu
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
| | - Hongtao Liu
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
| | - Shaozu Ma
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
| | - Yifei Shen
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
| | - Bin Li
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, China
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Lai H, Wang J, Liao S, Liu G, Wang L, He Y, Gao C. Preparation, Multispectroscopic Characterization, and Stability Analysis of Monascus Red Pigments-Whey Protein Isolate Complex. Foods 2023; 12:foods12091745. [PMID: 37174284 PMCID: PMC10177942 DOI: 10.3390/foods12091745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023] Open
Abstract
Monascus red pigments (MRPs) are mainly used as natural food colorants; however, their application is limited due to their poor stability. To expand their areas of application, we investigated the binding constants and capacity of MRPs to whey protein isolate (WPI) and whey protein hydrolysate (WPH) and calculated the surface hydrophobicities of WPI and WPH. MRPs were combined with WPI and WPH at a hydrolysis degree (DH) of 0.5% to form the complexes (DH = 0.0%) and (DH = 0.5%), respectively. Subsequently, the structural characteristics of complex (DH = 0.5%) and WPI were characterized and the color retention rates of both complexes and MRPs were investigated under different pretreatment conditions. The results showed that the maximum binding constant of WPI with MRPs was 0.670 ± 0.06 U-1 and the maximum binding capacity was 180 U/g. Furthermore, the thermal degradation of complex (DH = 0.0%), complex (DH = 0.5%), and MRPs in a water bath at 50-100 °C followed a first-order kinetic model. Thus, the interaction of WPI with MRPs could alter the protein conformation of WPI and effectively protect the stability of MRPs.
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Affiliation(s)
- Huafa Lai
- National R&D Center for Se-Rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-Rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, Hubei Key Laboratory for Processing and Transformation of Agricultural Products, School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Jiahao Wang
- National R&D Center for Se-Rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-Rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Shengjia Liao
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, Hubei Key Laboratory for Processing and Transformation of Agricultural Products, School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Gang Liu
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, Hubei Key Laboratory for Processing and Transformation of Agricultural Products, School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Liling Wang
- College of Food Science and Engineering, Tarim University, Alar 843300, China
| | - Yi He
- National R&D Center for Se-Rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-Rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
- Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, Hubei Key Laboratory for Processing and Transformation of Agricultural Products, School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Chao Gao
- National R&D Center for Se-Rich Agricultural Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-Rich Agricultural Products, School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
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Kaur M, Goel M, Mishra RC, Lahane V, Yadav AK, Barrow CJ. Characterization of the Red Biochromes Produced by the Endophytic Fungus Monascus purpureus CPEF02 with Antimicrobial and Antioxidant Activities. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9040328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Food acceptability and appeal are significantly influenced by colour. Harmful effects associated with synthetic colorants are well established, and research is currently focused on developing natural, synthetic chemical-free substitutes from fungal sources, with broad applications in food, medicine, textiles and agriculture. Additionally, the market’s dearth of natural red colour substitutes requires the creation of novel red pigment alternatives from secure and scalable sources. The goal of the current research was to establish new endophytic marine fungi that are naturally occurring bio-sources of the red pigment. Based on its profuse extracellular red pigment-producing capacity, the fungus CPEF02 was selected and identified as Monascus purpureus CPEF02 via internal transcribed spacer (ITS) sequences and phylogenetic analysis. The chemical moieties of the pigmented extracts were identified by liquid chromatography-high resolution mass spectrometry (LC-HRMS). The optimal culture conditions for maximum pigment production were investigated by surveying various media compositions. The methanolic fungal colourant extract was shown to have substantial antibacterial and antifungal activities against anthropogenic pathogens, Staphylococcus aureus (MTCC 1430), methicillin-resistant Staphylococcus aureus (ATCCBAA811), Salmonella typhimurium (MTCC 3241) and Vibrio cholerae (N16961) at a 100 µg/mL concentration and at a 1 mg/mL concentration for Alternaria solani (ITCC 4632) and Rhizoctonia solani (AG1-IA). This extract also exhibited antioxidant activity against the 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) radical with an IC50 of 14.42 µg/mL and a Trolox equivalent antioxidant capacity of 0.571 µM Trolox/µg of the methanolic colourant extract. The findings suggested that M. purpureus’s pigment could be a source of an industrially useful natural red colourant.
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Zhang J, Shao Y, Chen F. Overexpression of MrEsa1 accelerated growth, increased ascospores yield, and the polyketide production in Monascus ruber. J Basic Microbiol 2023. [PMID: 36760018 DOI: 10.1002/jobm.202200664] [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: 11/21/2022] [Revised: 01/05/2023] [Accepted: 01/21/2023] [Indexed: 02/11/2023]
Abstract
Esa1 has been proven to be an important histone acetyltransferase involved in the regulation of growth and metabolism. Monascus spp. with nearly 2000 years of edible history in East Asian countries can produce a variety of polyketides. It is unknown whether Esa1 plays a regulatory role in Monascus spp. In this study, we isolated the homology of histone acetyltransferase Esa1 (named MrEsa1) and constructed a mresa1-overexpressed strain. Western blot experiments showed that MrEsa1 hyperacetylated at K4 and K9 of the H3 subunit in Monascus ruber. Overexpression of mresa1 led to the larger colony diameter and increased dry cell mass; meanwhile, the conidia germination rate was significantly accelerated in the mresa1-overexpressed strain before 4 h, and the number of ascospores in the mresa1-overexpressed strain was significantly higher than that in WT. In addition, the Monascus azaphilone pigments (MonAzPs) and citrinin production of the mresa1-overexpressed strain were 1.7 and 2.4 times more than those of WT, respectively. Reverse transcription-quantitative polymerase chain reaction experiment suggested that mrpigB, mrpigH, mrpigJ, and mrpigK, involved in MonAzPs synthesis, and pksCT, mrl3, and mrl7, involved in citrinin synthesis, were upregulated in mresa1-overexpressed strain. This study provides important insights into the effect of MrEsa1 on the developmental process and the production of secondary metabolites in Monascus spp.
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Affiliation(s)
- Jing Zhang
- Jiangsu Food and Pharmaceutical Science College, Huaian, People's Republic of China.,College of Food Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Yanchun Shao
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Fusheng Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
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Bhatnagar S, Aoyagi H. Thermal and UV Degradation Kinetics of Water-Soluble Extracellular Pigment Produced by Talaromyces purpurogenus. FOOD BIOPROCESS TECH 2022. [DOI: 10.1007/s11947-021-02733-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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