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Rosier CL, Kittredge D, Nainiger B, Duarte O, Austic G, TerAvest D. Validation of low-cost reflectometer to identify phytochemical accumulation in food crops. Sci Rep 2024; 14:2524. [PMID: 38291145 PMCID: PMC10827735 DOI: 10.1038/s41598-024-52713-0] [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: 09/26/2023] [Accepted: 01/23/2024] [Indexed: 02/01/2024] Open
Abstract
Diets consisting of greater quantity/diversity of phytochemicals are correlated with reduced risk of disease. This understanding guides policy development increasing awareness of the importance of consuming fruits, grains, and vegetables. Enacted policies presume uniform concentrations of phytochemicals across crop varieties regardless of production/harvesting methods. A growing body of research suggests that concentrations of phytochemicals can fluctuate within crop varieties. Improved awareness of how cropping practices influence phytochemical concentrations are required, guiding policy development improving human health. Reliable, inexpensive laboratory equipment represents one of several barriers limiting further study of the complex interactions influencing crop phytochemical accumulation. Addressing this limitation our study validated the capacity of a low-cost Reflectometer ($500) to measure phytochemical content in selected crops, against a commercial grade laboratory spectrophotometer. Our correlation results ranged from r2 = 0.81 for protein in wheat and oats to r2 = 0.99 for polyphenol content in lettuce in both the Reflectometer and laboratory spectrophotometer assessment, suggesting the Reflectometer provides an accurate accounting of phytochemical content within evaluated crops. Repeatability evaluation demonstrated good reproducibility of the Reflectometer to assess crop phytochemical content. Additionally, we confirmed large variation in phytochemical content within specific crop varieties, suggesting that cultivar is but one of multiple drivers of phytochemical accumulation. Our findings indicate dramatic nutrient variations could exist across the food supply, a point whose implications are not well understood. Future studies should investigate the interactions between crop phytochemical accumulation and farm management practices that influence specific soil characteristics.
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2
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Peng H, Simko I. Extending lettuce shelf life through integrated technologies. Curr Opin Biotechnol 2023; 81:102951. [PMID: 37182322 DOI: 10.1016/j.copbio.2023.102951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/16/2023] [Accepted: 04/17/2023] [Indexed: 05/16/2023]
Abstract
Lettuce, a leafy vegetable used in cuisines worldwide, is a highly perishable product sensitive to postharvest losses caused by biotic and abiotic factors. The existing technologies and approaches used during plant cultivation, harvest, processing, transportation, and storage can limit the postharvest issues, but further improvements are needed to meet a growing demand for excellent product appearance, combined with superb quality, biosafety, and low economic and environmental cost. This review summarizes our current understanding of lettuce postharvest physiology and genetics with focus on enzymatic discoloration of wounded surfaces and rapid tissue deterioration. Discussed are existing and emerging integrated technologies and approaches that can facilitate achieving outstanding postharvest quality of lettuce products.
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Affiliation(s)
- Hui Peng
- Everglades Research and Education Center - Horticultural Sciences Department, University of Florida, Belle Glade, FL 95616, USA
| | - Ivan Simko
- U.S. Department of Agriculture, Agricultural Research Service, Crop Improvement and Protection Research Unit, Salinas, CA 93905, USA.
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Yaghoubi Khanghahi M, AbdElgawad H, Verbruggen E, Korany SM, Alsherif EA, Beemster GTS, Crecchio C. Biofertilisation with a consortium of growth-promoting bacterial strains improves the nutritional status of wheat grain under control, drought, and salinity stress conditions. PHYSIOLOGIA PLANTARUM 2022; 174:e13800. [PMID: 36250979 DOI: 10.1111/ppl.13800] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/22/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
We investigated the effect of plant growth-promoting bacterial strains (PGPB) as biofertilisers on the grain metabolic composition of durum wheat (Triticum durum Desf.). To this aim, we conducted a greenhouse experiment where we grew durum wheat plants supplied with a biofertiliser consortium of four PGPB and/or chemical fertiliser (containing nitrogen, phosphorus, potassium, and zinc), under non-stress, drought (at 40% field capacity), or salinity (150 mM NaCl) conditions. Nutrient accumulations in the grain were increased in plants treated with the biofertiliser consortium, alone or with a half dose of chemical fertilisers, compared to those in no fertilisation treatment. A clear benefit of biofertiliser application in the improvement of protein, soluble sugar, starch, and lipid contents in the grains was observed in comparison with untreated controls, especially under stress conditions. The most striking observation was the absence of significant differences between biofertiliser and chemical fertiliser treatments for most parameters. Moreover, the overall response to the biofertiliser consortium was accompanied by greater changes in amino acids, organic acids, and fatty acid profiles. In conclusion, PGPB improved the metabolic and nutrient status of durum wheat grains to a similar extent as chemical fertilisers, particularly under stress conditions, demonstrating the value of PGPB as a sustainable fertilisation treatment.
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Affiliation(s)
| | - Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Antwerp, Belgium
- Department of Botany and Microbiology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Erik Verbruggen
- Plants and Ecosystems Research Group, Department of Biology, University of Antwerp, Universiteitsplein 1C, Wilrijk, Belgium
| | - Shereen Magdy Korany
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Emad A Alsherif
- Department of Botany and Microbiology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
- Biology Department, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
| | - Gerrit T S Beemster
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Carmine Crecchio
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Bari, Italy
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4
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Klem K, Oravec M, Holub P, Šimor J, Findurová H, Surá K, Veselá B, Hodaňová P, Jansen MAK, Urban O. Interactive effects of nitrogen, UV and PAR on barley morphology and biochemistry are associated with the leaf C:N balance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 172:111-124. [PMID: 35063862 DOI: 10.1016/j.plaphy.2022.01.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/21/2021] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
Environmental conditions to which plants acclimate prior exposure to abiotic or biotic stressors can greatly affect their subsequent resilience. This may have a significant impact on the response to ongoing climate change and can be useful for increasing the food security under adverse weather conditions associated with climate change.Within this study, we tested the hypothesis that plant morphological and biochemical acclimation to radiation conditions and nitrogen (N) availability is closely linked with carbon (C) and N balance. Four barley (Hordeum vulgare) varieties, differing in their morphological characteristics and sensitivity to photooxidative stress, were grown at two levels of N supply and four radiation regimes combining distinct levels of ultraviolet (UV) and photosynthetically active radiation (PAR). Changes in root and shoot morphology, accumulation of phenolic compounds, amino acids, and sugars were studied together with the analysis of C and N content in leaves. Both UV and PAR reduced leaf length and increased root-to-shoot ratio (R:S). Such effect was more pronounced under high N availability. High N supply reduced R:S, but this effect showed significant interactions with UV and PAR, and also with barley variety. Changes in R:S were positively related to C:N ratio in leaves that varied in response to both N availability and radiation treatments. UV radiation, particularly in combination with high PAR intensity, led to increases in most phenolic compounds (particularly flavones such as saponarin, homoorientin and isovitexin) which was also closely associated with changes in C:N ratio, while specifically phenolic acids (vanillic and syringic acids) decreased under high levels of UV and PAR, and hydroxycinnamic acids responded positively mainly to PAR. Although high N availability generally reduced the accumulation of phenolic compounds, this effect was genotype-specific and modulated by the radiation regime. A similar antagonistic effect of radiation treatment and N availability was also found for the accumulation of sugars (pentoses), resulting in a close relationship between the accumulation of pentoses and C:N ratio. The accumulation of most amino acids, in contrary to phenolic compounds, increases at high N and is also stimulated by high PAR and UV intensities. We conclude that radiation conditions and N availability have opposite effects on plant morphology and accumulation of most phenolic compounds and modulate the amino acid and sugar metabolism. Strong associations of these responses with changes in C:N ratio indicates that plant stoichiometry integrates acclimation processes and induction of relevant defence mechanisms.
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Affiliation(s)
- K Klem
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic; Mendel University on Brno, Czech Republic.
| | - M Oravec
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic
| | - P Holub
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic
| | - J Šimor
- Mendel University on Brno, Czech Republic
| | - H Findurová
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic; Mendel University on Brno, Czech Republic
| | - K Surá
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic
| | - B Veselá
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic
| | - P Hodaňová
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic
| | - M A K Jansen
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic; University College Cork, Lee Road, Cork, Ireland
| | - O Urban
- Global Change Research Institute CAS, Bělidla 986/4a, CZ-603 00, Brno, Czech Republic
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JANG SW, KIM YD, LEE S, YIM SH. Assessment of antioxidant activities of HeukHarang a novel Korean Lectuca sativa L. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.06522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Seo Woo JANG
- Jeollanamdo Agricultural Research & Extension Services, Korea
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Yang X, Gil MI, Yang Q, Tomás-Barberán FA. Bioactive compounds in lettuce: Highlighting the benefits to human health and impacts of preharvest and postharvest practices. Compr Rev Food Sci Food Saf 2022; 21:4-45. [PMID: 34935264 DOI: 10.1111/1541-4337.12877] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 09/09/2021] [Accepted: 10/28/2021] [Indexed: 12/18/2022]
Abstract
Lettuce is one of the most commonly consumed leafy vegetables worldwide and is available throughout the entire year. Lettuce is also a significant source of natural phytochemicals. These compounds, including glycosylated flavonoids, phenolic acids, carotenoids, the vitamin B groups, ascorbic acid, tocopherols, and sesquiterpene lactones, are essential nutritional bioactive compounds. This review aims to provide a comprehensive understanding of the composition of health-promoting compounds in different types of lettuce, the potential health benefits of lettuce in reducing the risks of chronic diseases, and the effect of preharvest and postharvest practices on the biosynthesis and accumulation of health-promoting compounds in lettuce.
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Affiliation(s)
- Xiao Yang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences (IUA-CAAS), Chengdu National Agricultural Science and Technology Center, Chengdu, China
| | - María I Gil
- Centre for Applied Biology and Soil Science of Segura, Spanish National Research Council (CEBAS-CSIC), Murcia, Spain
| | - Qichang Yang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences (IUA-CAAS), Chengdu National Agricultural Science and Technology Center, Chengdu, China
| | - Francisco A Tomás-Barberán
- Centre for Applied Biology and Soil Science of Segura, Spanish National Research Council (CEBAS-CSIC), Murcia, Spain
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Nikzad N, Parastar H. Evaluation of the effect of organic pollutants exposure on the antioxidant activity, total phenolic and total flavonoid content of lettuce (Lactuca sativa L.) using UV–Vis spectrophotometry and chemometrics. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106632] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Yan H, Mao P. Comparative Time-Course Physiological Responses and Proteomic Analysis of Melatonin Priming on Promoting Germination in Aged Oat ( Avena sativa L.) Seeds. Int J Mol Sci 2021; 22:ijms22020811. [PMID: 33467472 PMCID: PMC7830126 DOI: 10.3390/ijms22020811] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/05/2021] [Accepted: 01/12/2021] [Indexed: 01/25/2023] Open
Abstract
Melatonin priming is an effective strategy to improve the germination of aged oat (Avena sativa L.) seeds, but the mechanism involved in its time-course responses has remained largely unknown. In the present study, the phenotypic differences, ultrastructural changes, physiological characteristics, and proteomic profiles were examined in aged and melatonin-primed seed (with 10 μM melatonin treatment for 12, 24, and 36 h). Thus, 36 h priming (T36) had a better remediation effect on aged seeds, reflecting in the improved germinability and seedlings, relatively intact cell ultrastructures, and enhanced antioxidant capacity. Proteomic analysis revealed 201 differentially abundant proteins between aged and T36 seeds, of which 96 were up-accumulated. In melatonin-primed seeds, the restoration of membrane integrity by improved antioxidant capacity, which was affected by the stimulation of jasmonic acid synthesis via up-accumulation of 12-oxo-phytodienoic acid reductase, might be a candidate mechanism. Moreover, the relatively intact ultrastructures enabled amino acid metabolism and phenylpropanoid biosynthesis, which were closely associated with energy generation through intermediates of pyruvate, phosphoenolpyruvate, fumarate, and α-ketoglutarate, thus providing energy, active amino acids, and secondary metabolites necessary for germination improvement of aged seeds. These findings clarify the time-course related pathways associated with melatonin priming on promoting the germination of aged oat seeds.
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Affiliation(s)
- Huifang Yan
- Forage Seed Laboratory, China Agricultural University, Beijing 100193, China;
- Grassland Agri-Husbandry Research Center, College of Grassland Science, Qingdao Agricultural University, Qingdao 266109, China
| | - Peisheng Mao
- Forage Seed Laboratory, China Agricultural University, Beijing 100193, China;
- Correspondence: ; Tel.: +86-010-62733311
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9
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The Impact of Organic Fertilizer Produced with Vegetable Residues in Lettuce (Lactuca sativa L.) Cultivation and Antioxidant Activity. SUSTAINABILITY 2020. [DOI: 10.3390/su13010128] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Large amounts of organic waste are produced worldwide. This work aims to evaluate the influence of organic fertilizers, onion peel flour (OPF) and fruit and vegetable flour (FVF) on lettuce cultivation. Lettuce seeds were planted in pure soil (P), P with 10% OPF, and P with 3% FVF. Soil and lettuce leaves were analyzed. The addition of OPF and FVF improved soil quality but only in the soil with FVF was there significant lettuce growth and increase of antioxidant activity: Folin (8.89 mg EAG/g FM), FRAP (1.31 mg Fe2+/g FM), ABTS (4.09 mg TEAC/g−1 FM) and ORAC (0.52 mg TEac/g−1 FM). The present results show an improvement in lettuce nutritional quality and the potential of FVF as an organic fertilizer.
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10
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García CJ, Yang X, Huang D, Tomás-Barberán FA. Can we trust biomarkers identified using different non-targeted metabolomics platforms? Multi-platform, inter-laboratory comparative metabolomics profiling of lettuce cultivars via UPLC-QTOF-MS. Metabolomics 2020; 16:85. [PMID: 32737683 DOI: 10.1007/s11306-020-01705-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 07/20/2020] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Data analysis during UPLC-MS non-targeted metabolomics introduces variation as different manufacturers use specific algorithms for data treatment and this makes untargeted metabolomics an application for the discovery of new biomarkers with low confidence in the reproducibility of the results under the use of different metabolomics platforms. OBJECTIVES This study compared the ability of two platforms (Agilent UPLC-ESI-QTOF-MS and Waters UPLC-IMS-QTOF-MS) to identify biomarkers in butterhead and romaine lettuce cultivars. METHODS Two case studies by different metabolomics platforms: (1) Waters and Agilent datasets processed by the same data pre-processing software (Progenesis QI), and (2) Datasets processed by different data pre-processing software. RESULTS A higher number of candidate biomarkers shared between sample groups in case 2 (101) than in case 1 (26) was found. Thirteen metabolites were common to both cases. Romaine lettuce was characterised by phenolic compounds including flavonoids, hydroxycinnamate derivatives, and 9-undecenal, while Butterhead showed sesquiterpene lactones and xanthosine. This study demonstrates that high percentages of the most discriminatory entities can be obtained by using the manufacturers' embedded pre-processing software and following the recommended processing data guidelines using commercial software to normalise the data matrix.
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Affiliation(s)
- Carlos J García
- Research Group on Quality, Safety, and Bioactivity of Plant Foods, Center for Applied Soil Science and Biology of the Segura, Spanish National Research Council (CEBAS-CSIC), 30100, Murcia, Spain
| | - Xiao Yang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu National Agricultural Science and Technology Center, Chengdu, 610213, People's Republic of China
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Danfeng Huang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
| | - Francisco A Tomás-Barberán
- Research Group on Quality, Safety, and Bioactivity of Plant Foods, Center for Applied Soil Science and Biology of the Segura, Spanish National Research Council (CEBAS-CSIC), 30100, Murcia, Spain.
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Recent Trends in the Application of Chromatographic Techniques in the Analysis of Luteolin and Its Derivatives. Biomolecules 2019; 9:biom9110731. [PMID: 31726801 PMCID: PMC6921003 DOI: 10.3390/biom9110731] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 12/18/2022] Open
Abstract
Luteolin is a flavonoid often found in various medicinal plants that exhibits multiple biological effects such as antioxidant, anti-inflammatory and immunomodulatory activity. Commercially available medicinal plants and their preparations containing luteolin are often used in the treatment of hypertension, inflammatory diseases, and even cancer. However, to establish the quality of such preparations, appropriate analytical methods should be used. Therefore, the present paper provides the first comprehensive review of the current analytical methods that were developed and validated for the quantitative determination of luteolin and its C- and O-derivatives including orientin, isoorientin, luteolin 7-O-glucoside and others. It provides a systematic overview of chromatographic analytical techniques including thin layer chromatography (TLC), high performance thin layer chromatography (HPTLC), liquid chromatography (LC), high performance liquid chromatography (HPLC), gas chromatography (GC) and counter-current chromatography (CCC), as well as the conditions used in the determination of luteolin and its derivatives in plant material.
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Zhou W, Chen Y, Xu H, Liang X, Hu Y, Jin C, Lu L, Lin X. Short-Term Nitrate Limitation Prior to Harvest Improves Phenolic Compound Accumulation in Hydroponic-Cultivated Lettuce ( Lactuca sativa L.) without Reducing Shoot Fresh Weight. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:10353-10361. [PMID: 30222346 DOI: 10.1021/acs.jafc.8b02157] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Long-term exposure to a low nitrogen supply could effectively improve phenolic content in vegetables, but it also greatly decreases the yield. Therefore, it is necessary to develop cost-effective strategies of nitrogen management to overcome these obstacles. Here, we find that decreasing the nitrogen (NO3-) supply from 8.0 to below 2.0 mM during the last 7 days before harvest significantly increases phenolic levels and antioxidant capacity of the soluble fraction in two hydroponic-cultivated lettuces, which is demonstrated by the up-regulation of related genes ( PAL1, CHS, F3H, DFR, F35H, and UFGT) involved in the phenolic synthesis pathway. Importantly, short-term nitrate limitation before harvest does not affect yield production unless nitrogen supply is reduced below 1.0 and 0.5 mM for Ziluoma and Lvluo, respectively. These findings suggest that appropriate short-term nitrate limitation before harvest, considering genotype variation, is feasible for improving the phenolic content and antioxidant capacity of vegetables without reducing their yield.
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Affiliation(s)
| | | | - Huaping Xu
- Mathematics Teaching and Research Section, College of Pharmaceutical Sciences , Zhejiang Chinese Medical University , Hangzhou 310053 , China
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Yang X, Wei S, Liu B, Guo D, Zheng B, Feng L, Liu Y, Tomás-Barberán FA, Luo L, Huang D. A novel integrated non-targeted metabolomic analysis reveals significant metabolite variations between different lettuce ( Lactuca sativa. L) varieties. HORTICULTURE RESEARCH 2018; 5:33. [PMID: 29977569 PMCID: PMC6015802 DOI: 10.1038/s41438-018-0050-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 04/06/2018] [Accepted: 05/13/2018] [Indexed: 05/02/2023]
Abstract
Lettuce is an important leafy vegetable that represents a significant dietary source of antioxidants and bioactive compounds. However, the levels of metabolites in different lettuce cultivars are poorly characterized. In this study, we used combined GC × GC-TOF/MS and UPLC-IMS-QTOF/MS to detect and relatively quantify metabolites in 30 lettuce cultivars representing large genetic diversity. Comparison with online databases, the published literature, standards as well using collision cross-section values enabled putative identification of 171 metabolites. Sixteen of these 171 metabolites (including phenolic acid derivatives, glycosylated flavonoids, and one iridoid) were present at significantly different levels in leaf and head type lettuces, which suggested the significant metabolomic variations between the leaf and head types of lettuce are related to secondary metabolism. A combination of the results and metabolic network analysis techniques suggested that leaf and head type lettuces contain not only different levels of metabolites but also have significant variations in the corresponding associated metabolic networks. The novel lettuce metabolite library and novel non-targeted metabolomics strategy devised in this study could be used to further characterize metabolic variations between lettuce cultivars or other plants. Moreover, the findings of this study provide important insight into metabolic adaptations due to natural and human selection, which could stimulate further research to potentially improve lettuce quality, yield, and nutritional value.
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Affiliation(s)
- Xiao Yang
- 1School of Agriculture and Biology, Shanghai Jiao Tong University, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Shanghai, 200240 China
- 2Shanghai Agrobiological Gene Center, Shanghai, 201106 China
- 3Research Group on Quality, Safety and Bioactivity of Plant Foods, Center for Applied Soil Science and Biology of the Segura, the Spanish National Research Council, (CEBAS-CSIC), Murcia, 30100 Spain
| | - Shiwei Wei
- 2Shanghai Agrobiological Gene Center, Shanghai, 201106 China
| | - Bin Liu
- 1School of Agriculture and Biology, Shanghai Jiao Tong University, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Shanghai, 200240 China
| | - Doudou Guo
- 1School of Agriculture and Biology, Shanghai Jiao Tong University, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Shanghai, 200240 China
| | - Bangxiao Zheng
- 4Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021 China
- 5University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Lei Feng
- 6Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Yumin Liu
- 6Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai, 200240 China
| | - Francisco A Tomás-Barberán
- 3Research Group on Quality, Safety and Bioactivity of Plant Foods, Center for Applied Soil Science and Biology of the Segura, the Spanish National Research Council, (CEBAS-CSIC), Murcia, 30100 Spain
| | - Lijun Luo
- 2Shanghai Agrobiological Gene Center, Shanghai, 201106 China
| | - Danfeng Huang
- 1School of Agriculture and Biology, Shanghai Jiao Tong University, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Shanghai, 200240 China
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