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Marcellus M, Goud EM, Swartz N, Brown E, Soper FM. Evolutionary history and root trait coordination predict nutrient strategy in tropical legume trees. THE NEW PHYTOLOGIST 2024; 243:1711-1723. [PMID: 39005157 DOI: 10.1111/nph.19962] [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: 04/09/2024] [Accepted: 06/27/2024] [Indexed: 07/16/2024]
Abstract
Plants express diverse nutrient use and acquisition traits, but it is unclear how trait combinations at the species level are constrained by phylogeny, trait coordination, or trade-offs in resource investment. One trait - nitrogen (N) fixation - is assumed to correlate with other traits and used to define plant functional groups, despite potential confounding effects of phylogeny. We quantified growth, carbon metabolism, fixation rate, root phosphatase activity (RPA), mycorrhizal colonization, and leaf and root morphology/chemistry across 22 species of fixing and nonfixing tropical Fabaceae trees under common conditions. Belowground trait variation was high even among closely related species, and most traits displayed a phylogenetic signal, including N-fixation rate and nodule biomass. Across species, we observed strong positive correlations between physiological traits such as RPA and root respiration. RPA increased ~ fourfold per unit increase in fixation, supporting the debated hypothesis that N-fixers 'trade' N for phosphatases to enhance phosphorus acquisition. Specific root length and root N differed between functional groups, though for other traits, apparent differences became nonsignificant after accounting for phylogenetic nonindependence. We conclude that evolutionary history, trait coordination, and fixation ability contribute to nutrient trait expression at the species level, and recommend explicitly considering phylogeny in analyses of functional groupings.
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Affiliation(s)
- Mia Marcellus
- Department of Biology, McGill University, Montreal, QC, H3A 1B1, Canada
| | - Ellie M Goud
- Department of Biology, Saint Mary's University, Halifax, NS, B3H 3C3, Canada
| | - Natalie Swartz
- Department of Biology, McGill University, Montreal, QC, H3A 1B1, Canada
| | - Emily Brown
- Department of Biology, McGill University, Montreal, QC, H3A 1B1, Canada
| | - Fiona M Soper
- Department of Biology, McGill University, Montreal, QC, H3A 1B1, Canada
- Bieler School of Environment, McGill University, Montreal, QC, H3A 1B1, Canada
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2
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Xu X, Zhu Y, Yuan Y, Sohail H, He S, Ye Y, Wang M, Lv M, Qi X, Yang X, Chen X. R2R3-MYB transcription factor CsMYB60 controls mature fruit skin color by regulating flavonoid accumulation in cucumber. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 119:796-813. [PMID: 38733630 DOI: 10.1111/tpj.16797] [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: 10/08/2023] [Revised: 03/22/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024]
Abstract
Skin color is an important trait that determines the cosmetic appearance and quality of fruits. In cucumber, the skin color ranges from white to brown in mature fruits. However, the genetic basis for this important trait remains unclear. We conducted a genome-wide association study of natural cucumber populations, along with map-based cloning techniques, on an F2 population resulting from a cross between Pepino (with yellow-brown fruit skin) and Zaoer-N (with creamy fruit skin). We identified CsMYB60 as a candidate gene responsible for skin coloration in mature cucumber fruits. In cucumber accessions with white to pale yellow skin color, a premature stop mutation (C to T) was found in the second exon region of CsMYB60, whereas light yellow cucumber accessions exhibited splicing premature termination caused by an intronic mutator-like element insertion in CsMYB60. Transgenic CsMYB60c cucumber plants displayed a yellow-brown skin color by promoting accumulation of flavonoids, especially hyperoside, a yellow-colored flavonol. CsMYB60c encodes a nuclear protein that primarily acts as a transcriptional activator through its C-terminal activation motif. RNA sequencing and DNA affinity purification sequencing assays revealed that CsMYB60c promotes skin coloration by directly binding to the YYTACCTAMYT motif in the promoter regions of flavonoid biosynthetic genes, including CsF3'H, which encodes flavonoid 3'-hydroxylase. The findings of our study not only offer insight into the function of CsMYB60 as dominantly controlling fruit coloration, but also highlight that intronic DNA mutations can have a similar phenotypic impact as exonic mutations, which may be valuable in future cucumber breeding programs.
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Affiliation(s)
- Xuewen Xu
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Yu Zhu
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Ying Yuan
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Hamza Sohail
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Shuying He
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Yi Ye
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Meixin Wang
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Mai Lv
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Xiaohua Qi
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Xiaodong Yang
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, 225009, China
| | - Xuehao Chen
- School of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, 225009, China
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3
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Sodedji KAF, Assogbadjo AE, Lee B, Kim HY. An Integrated Approach for Biofortification of Carotenoids in Cowpea for Human Nutrition and Health. PLANTS (BASEL, SWITZERLAND) 2024; 13:412. [PMID: 38337945 PMCID: PMC10856932 DOI: 10.3390/plants13030412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 01/26/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024]
Abstract
Stress-resilient and highly nutritious legume crops can alleviate the burden of malnutrition and food security globally. Here, we focused on cowpea, a legume grain widely grown and consumed in regions at a high risk of micronutrient deficiencies, and we discussed the past and present research on carotenoid biosynthesis, highlighting different knowledge gaps and prospects for increasing this micronutrient in various edible parts of the crop. The literature survey revealed that, although carotenoids are important micronutrients for human health and nutrition, like in many other pulses, the potential of carotenoid biofortification in cowpea is still underexploited. We found that there is, to some extent, progress in the quantification of this micronutrient in cowpea; however, the diversity in content in the edible parts of the crop, namely, grains, pods, sprouts, and leaves, among the existing cowpea genetic resources was uncovered. Based on the description of the different factors that can influence carotenoid biosynthesis and accumulation in cowpea, we anticipated that an integrated use of omics in breeding coupled with mutagenesis and genetic engineering in a plant factory system would help to achieve a timely and efficient increase in carotenoid content in cowpea for use in the food systems in sub-Saharan Africa and South Asia.
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Affiliation(s)
- Kpedetin Ariel Frejus Sodedji
- Smart Farm Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Republic of Korea;
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
- Non-Timber Forest Products and Orphan Crop Species Unit, Laboratory of Applied Ecology (LEA), University of Abomey-Calavi (UAC), Cotonou 05 BP 1752, Benin;
| | - Achille Ephrem Assogbadjo
- Non-Timber Forest Products and Orphan Crop Species Unit, Laboratory of Applied Ecology (LEA), University of Abomey-Calavi (UAC), Cotonou 05 BP 1752, Benin;
| | - Bokyung Lee
- Department of Health Sciences, The Graduate School of Dong-A University, Busan 49315, Republic of Korea
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Republic of Korea
| | - Ho-Youn Kim
- Smart Farm Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Republic of Korea;
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
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4
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Bakhtiar Z, Hassandokht M, Naghavi MR, Mirjalili MH. Variability in proximate composition, phytochemical traits and antioxidant properties of Iranian agro-ecotypic populations of fenugreek (Trigonella foenum-graecum L.). Sci Rep 2024; 14:87. [PMID: 38167975 PMCID: PMC10762012 DOI: 10.1038/s41598-023-50699-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 12/23/2023] [Indexed: 01/05/2024] Open
Abstract
Fenugreek (Trigonella foenum-graecum L.) is a multi-use annual forage legume crop that is widely used in food products such as syrup, bitter run, curries, stew, and flavoring. In the present study, morphological traits, proximate composition (moisture, crude fibre, protein, fat, carbohydrate, and energy value), total phenol and total flavonoid contents, and antioxidant properties of 31 Iranian agro-ecotypic populations of the plant was investigated. Among the leaf and seed samples studied, the seeds exhibited the high ash (3.94 ± 0.12%), fat (7.94 ± 0.78%), crude fibre (10.3 ± 0.25%), protein (35.41 ± 1.86%), and carbohydrate (50.5 ± 1.90%) content. In general, more energy value (kcal/100 g) was also obtained from the seed (318.88 ± 1.78-350.44 ± 1.27) than leaf samples (45.50 ± 1.32-89.28 ± 0.85). Antioxidant activity and power of leaf samples were ranged from 67.95 ± 0.05‒157.52 ± 0.20 μg/ml and from 45.17 ± 0.01‒361.92 ± 0.78 μmol Fe+2 per g dry weigh, respectively. Positive linear correlations between antioxidant activity and total phenolic compounds were observed. A significant correlation between proximate composition (dependent variable) and some morphological features (independent variable) was observed. Considerable variability in the studied traits among the plant samples can be interestingly used in further food and production systems.
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Affiliation(s)
- Ziba Bakhtiar
- Department of Horticultural Sciences, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mohammadreza Hassandokht
- Department of Horticultural Sciences, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
| | - Mohammad Reza Naghavi
- Division of Biotechnology, Department of Agronomy and Plant Breeding, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
| | - Mohammad Hossein Mirjalili
- Department of Agriculture, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, 1983969411, Iran.
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López-Pozo M, Fernández-Marín B, García-Plazaola J, Seal CE, Ballesteros D. Ageing kinetics of fern chlorophyllous spores during dry storage is determined by its antioxidant potential and likely induced by photosynthetic machinery. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 337:111870. [PMID: 37722506 DOI: 10.1016/j.plantsci.2023.111870] [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: 06/12/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 09/20/2023]
Abstract
Ageing in dry chlorophyllous propagules is leaded by photooxidation through the photosynthetic machinery, but why species differ in longevity and the ageing mechanisms of when light and oxygen are absent are unknown. We hypothesize that the cellular antioxidant capacity is key for the inter- and intra-specific differences in the ageing process. We have tested this hypothesis in chlorophyllous spores of two ferns. They were subjected to four different storage regimes resulting from light/dark and normoxia/hypoxia combinations. Lipophilic and hydrophilic antioxidants, reactive oxygen species (ROS), and photosynthetic pigments were analysed in parallel to germination and the recovery of Fv/Fm over a storage period of up to 22-months. We show that light and oxygen accelerate the ageing process, but their mechanisms (ROS, increase, antioxidant capacity decrease, loss of efficiency of the photosystem II, pigment degradation) appear the same under all conditions tested. The end of the asymptomatic phase of longevity, when a sudden drop of germination occurs, seems to be determined by a threshold in the depletion of antioxidants. Our results support the hypothesis that ageing kinetics in dry plant propagules is determined by the antioxidant system, but also suggests an active role of the photosynthetic machinery during ageing, even in darkness and hypoxia.
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Affiliation(s)
- M López-Pozo
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Vizcaya, Spain.
| | - B Fernández-Marín
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Vizcaya, Spain
| | - J García-Plazaola
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Vizcaya, Spain
| | - C E Seal
- Royal Botanic Gardens Kew, Wakehurst, Ardingly, West Sussex, UK
| | - D Ballesteros
- Royal Botanic Gardens Kew, Wakehurst, Ardingly, West Sussex, UK; Department of Botany and Geology, Universitat de Valencia, Burjassot, Spain
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Baud S, Corso M, Debeaujon I, Dubreucq B, Job D, Marion-Poll A, Miquel M, North H, Rajjou L, Lepiniec L. Recent progress in molecular genetics and omics-driven research in seed biology. C R Biol 2023; 345:61-110. [PMID: 36847120 DOI: 10.5802/crbiol.104] [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: 12/05/2022] [Accepted: 12/07/2022] [Indexed: 01/11/2023]
Abstract
Elucidating the mechanisms that control seed development, metabolism, and physiology is a fundamental issue in biology. Michel Caboche had long been a catalyst for seed biology research in France up until his untimely passing away last year. To honour his memory, we have updated a review written under his coordination in 2010 entitled "Arabidopsis seed secrets unravelled after a decade of genetic and omics-driven research". This review encompassed different molecular aspects of seed development, reserve accumulation, dormancy and germination, that are studied in the lab created by M. Caboche. We have extended the scope of this review to highlight original experimental approaches implemented in the field over the past decade such as omics approaches aimed at investigating the control of gene expression, protein modifications, primary and specialized metabolites at the tissue or even cellular level, as well as seed biodiversity and the impact of the environment on seed quality.
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7
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da Silva GS, Firmino GV, Ferraro A, Appezzato-da-Glória B. Anatomical inferences on aerial bud protection of three Eugenia shrub species from the Cerrado. PLANT BIOLOGY (STUTTGART, GERMANY) 2023; 25:176-186. [PMID: 36314866 DOI: 10.1111/plb.13483] [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: 08/12/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Location and degree of protection of aerial buds are important functional traits in disturbance- or stress-prone environments since aerial buds ensure the development of new organs under favourable growing conditions. This study was carried out in a Brazilian Cerrado area under regeneration after long-term Pinus cultivation, where the trees were clear-cut in 2012 and the remaining material was burned in 2014. After the fire treatment, several species resprouted from belowground organs and their aboveground organs were directly exposed to full sunlight. We collected 15 terminal branches with fully expanded leaves from three individuals of each of three Eugenia species to investigate if those with well-developed belowground organs invest in bark for aboveground bud protection. The samples were analysed using light and electron microscopy. In addition to terminal and axillary buds, all species presented accessory buds, and the number varied according to the node analysed. None of the aerial buds were protected by bark, but all were well protected by cataphylls and densely pubescent leaf primordia. There were also inter- and intra-petiolar colleters that released a mucilaginous protein exudate. The distance between the shoot apical meristem and the outer surface was longer in the terminal bud than in axillary buds. The bud leaf primordia covering the shoot apical meristem had a thick cuticle, unicellular non-glandular trichomes that accumulate phenolic and lipophilic compounds, and secretory cavities. Our study shows that all three Eugenia species studied here had highly protected aerial buds allocated from belowground organs. These morphological traits may improve the chances of the species' persistence in areas subjected to frost events, low relative humidity, high irradiance and harmful UV levels.
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Affiliation(s)
- G S da Silva
- Plant Anatomy Laboratory, Department of Biological Sciences, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - G V Firmino
- Plant Anatomy Laboratory, Department of Biological Sciences, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, Brazil
| | - A Ferraro
- Department of Experimental and Functional Morphology, Institute of Botany of the Czech Academy of Sciences, Třeboň, Czech Republic
| | - B Appezzato-da-Glória
- Plant Anatomy Laboratory, Department of Biological Sciences, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, Brazil
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Gerna D, Ballesteros D, Arc E, Stöggl W, Seal CE, Marami-Zonouz N, Na CS, Kranner I, Roach T. Does oxygen affect ageing mechanisms of Pinus densiflora seeds? A matter of cytoplasmic physical state. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:2631-2649. [PMID: 35084458 DOI: 10.1093/jxb/erac024] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 01/26/2022] [Indexed: 05/26/2023]
Abstract
During desiccation, the cytoplasm of orthodox seeds solidifies into an intracellular glass with highly restricted diffusion and molecular mobility. Temperature and water content govern seed ageing rates, while oxygen (O2) can promote deteriorative reactions. However, whether the cytoplasmic physical state affects involvement of O2 in seed ageing remains unresolved. We aged Pinus densiflora seeds by controlled deterioration (CD) at 45 °C and distinct relative humidity (RH), resulting in cells with a glassy (11% and 30% RH) or fluid (60% and 80% RH) cytoplasm. Hypoxic conditions (0.4% O2) during CD delayed seed deterioration, lipid peroxidation, and decline of antioxidants (glutathione, α-tocopherol, and γ-tocopherol), but only when the cytoplasm was glassy. In contrast, when the cytoplasm was fluid, seeds deteriorated at the same rate regardless of O2 availability, while being associated with limited lipid peroxidation, detoxification of lipid peroxide products, substantial loss of glutathione, and resumption of glutathione synthesis. Changes in metabolite profiles provided evidence of other O2-independent enzymatic reactions in a fluid cytoplasm, including aldo-keto reductase and glutamate decarboxylase activities. Biochemical profiles of seeds stored under seed bank conditions resembled those obtained after CD regimes that maintained a glassy cytoplasm. Overall, O2 contributed more to seed ageing when the cytoplasm was glassy, rather than fluid.
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Affiliation(s)
- Davide Gerna
- Department of Botany and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
| | | | - Erwann Arc
- Department of Botany and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
| | - Wolfgang Stöggl
- Department of Botany and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
| | | | - Nicki Marami-Zonouz
- Department of Botany and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
| | - Chae Sun Na
- Seed Conservation Research Division, Department of Seed Vault, Baekdudaegan National Arboretum, 2160-53 Munsu-ro, Chunyang-myeon, Bonghwa-gun, Gyeongsangbuk-do, Republic of Korea
| | - Ilse Kranner
- Department of Botany and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
| | - Thomas Roach
- Department of Botany and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria
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Assessing the Fatty Acid, Carotenoid, and Tocopherol Compositions of Seeds from Apple Cultivars ( Malus domestica Borkh.) Grown in Norway. Foods 2021; 10:foods10081956. [PMID: 34441731 PMCID: PMC8392653 DOI: 10.3390/foods10081956] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/12/2021] [Accepted: 08/19/2021] [Indexed: 01/01/2023] Open
Abstract
Apple production generates large amounts of apple pomace including seeds, leading to high transportation costs, public health hazards and undesirable odor. A new reuse strategy of this kind of waste could solve environmental issues and/or create unconventional sources of health beneficial products. In total, seeds from 75 apple cultivars grown in Norway (both domestic and international) have been analyzed for the first time for oil content and fatty acid profile together with tocopherols and carotenoids quantification in defatted seeds. Seeds from cultivar Håkonseple had the highest oil content (22.10%), with linoleic, oleic acid, and palmitic acid as the most abundant fatty acids. The levels of β-carotene and lycopene carotenoids and α-tocopherol were the highest in defatted seeds of the cultivar Sureple Grøn. Principal component analysis separated cultivars according to the total oil content. The Norwegian apple cultivars Håkonseple, Kviteple, Tolleivseple, Vinterrosenstrips, and Tokheimseple are recommended for obtaining vegetable oil due to their high oil contents, while cultivar Sureple Grøn can be separated due to its high levels of β-carotene, lycopene and total tocopherols.
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10
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Nadal M, Brodribb TJ, Fernández-Marín B, García-Plazaola JI, Arzac MI, López-Pozo M, Perera-Castro AV, Gulías J, Flexas J, Farrant JM. Differences in biochemical, gas exchange and hydraulic response to water stress in desiccation tolerant and sensitive fronds of the fern Anemia caffrorum. THE NEW PHYTOLOGIST 2021; 231:1415-1430. [PMID: 33959976 DOI: 10.1111/nph.17445] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
Desiccation tolerant plants can survive extreme water loss in their vegetative tissues. The fern Anemia caffrorum produces desiccation tolerant (DT) fronds in the dry season and desiccation sensitive (DS) fronds in the wet season, providing a unique opportunity to explore the physiological mechanisms associated with desiccation tolerance. Anemia caffrorum plants with either DT or DS fronds were acclimated in growth chambers. Photosynthesis, frond structure and anatomy, water relations and minimum conductance to water vapour were measured under well-watered conditions. Photosynthesis, hydraulics, frond pigments, antioxidants and abscisic acid contents were monitored under water deficit. A comparison between DT and DS fronds under well-watered conditions showed that the former presented higher leaf mass per area, minimum conductance, tissue elasticity and lower CO2 assimilation. Water deficit resulted in a similar induction of abscisic acid in both frond types, but DT fronds maintained higher stomatal conductance and upregulated more prominently lipophilic antioxidants. The seasonal alternation in production of DT and DS fronds in A. caffrorum represents a mechanism by which carbon gain can be maximized during the rainy season, and a greater investment in protective mechanisms occurs during the hot dry season, enabling the exploitation of episodic water availability.
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Affiliation(s)
- Miquel Nadal
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears (UIB), INAGEA, Carretera de Valldemossa Km 7.5, Palma de Mallorca, Illes Balears, 07122, Spain
| | - Tim J Brodribb
- School of Natural Sciences, University of Tasmania, Hobart, Tas., 7001, Australia
| | - Beatriz Fernández-Marín
- Department of Botany, Ecology and Plant Physiology, University of La Laguna (ULL), Tenerife, 38200, Spain
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - José I García-Plazaola
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - Miren I Arzac
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - Marina López-Pozo
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - Alicia V Perera-Castro
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears (UIB), INAGEA, Carretera de Valldemossa Km 7.5, Palma de Mallorca, Illes Balears, 07122, Spain
| | - Javier Gulías
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears (UIB), INAGEA, Carretera de Valldemossa Km 7.5, Palma de Mallorca, Illes Balears, 07122, Spain
| | - Jaume Flexas
- Research Group on Plant Biology under Mediterranean Conditions, Departament de Biologia, Universitat de les Illes Balears (UIB), INAGEA, Carretera de Valldemossa Km 7.5, Palma de Mallorca, Illes Balears, 07122, Spain
- King Abdulaziz University, Jeddah, 80200, Saudi Arabia
| | - Jill M Farrant
- Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, Rondebosch, 7701, South Africa
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Swapnil P, Meena M, Singh SK, Dhuldhaj UP, Harish, Marwal A. Vital roles of carotenoids in plants and humans to deteriorate stress with its structure, biosynthesis, metabolic engineering and functional aspects. CURRENT PLANT BIOLOGY 2021; 26:100203. [DOI: 10.1016/j.cpb.2021.100203] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
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12
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Dias MG, Borge GIA, Kljak K, Mandić AI, Mapelli-Brahm P, Olmedilla-Alonso B, Pintea AM, Ravasco F, Tumbas Šaponjac V, Sereikaitė J, Vargas-Murga L, Vulić JJ, Meléndez-Martínez AJ. European Database of Carotenoid Levels in Foods. Factors Affecting Carotenoid Content. Foods 2021; 10:foods10050912. [PMID: 33919309 PMCID: PMC8143354 DOI: 10.3390/foods10050912] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/07/2021] [Accepted: 04/14/2021] [Indexed: 11/16/2022] Open
Abstract
Many studies indicate that diets including carotenoid-rich foods have positive effects on human health. Some of these compounds are precursors of the essential nutrient vitamin A. The present work is aimed at implementing a database of carotenoid contents of foods available in the European market. Factors affecting carotenoid content were also discussed. Analytical data available in peer-reviewed scientific literature from 1990 to 2018 and obtained by HPLC/UHPLC were considered. The database includes foods classified according to the FoodEx2 system and will benefit compilers, nutritionists and other professionals in areas related to food and human health. The results show the importance of food characterization to ensure its intercomparability, as large variations in carotenoid levels are observed between species and among varieties/cultivars/landraces. This highlights the significance of integrating nutritional criteria into agricultural choices and of promoting biodiversity. The uncertainty quantification associated with the measurements of the carotenoid content was very rarely evaluated in the literature consulted. According to the EuroFIR data quality evaluation system for food composition tables, the total data quality index mean was 24 in 35, reflecting efforts by researchers in the analytical methods, and less resources in the sampling plan documentation.
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Affiliation(s)
- M. Graça Dias
- Food and Nutrition Department, National Institute of Health Doutor Ricardo Jorge, IP, Av. Padre Cruz, 1649-016 Lisboa, Portugal; (M.G.D.); (F.R.)
| | - Grethe Iren A. Borge
- Nofima AS, Norwegian Institute of Food, Fisheries and Aquaculture Research, NO 1433 Ås, Norway;
| | - Kristina Kljak
- Department of Animal Nutrition, Faculty of Agriculture, University of Zagreb, Svetošimunska Cesta 25, 10 000 Zagreb, Croatia;
| | - Anamarija I. Mandić
- Institute of Food Technology in Novi Sad, University of Novi Sad, 21000 Novi Sad, Serbia;
| | - Paula Mapelli-Brahm
- Food Colour & Quality Laboratory, Department of Nutrition & Food Science, Facultad de Farmacia, Universidad de Sevilla, 41012 Sevilla, Spain;
| | | | - Adela M. Pintea
- Chemistry and Biochemistry Department, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania;
| | - Francisco Ravasco
- Food and Nutrition Department, National Institute of Health Doutor Ricardo Jorge, IP, Av. Padre Cruz, 1649-016 Lisboa, Portugal; (M.G.D.); (F.R.)
| | - Vesna Tumbas Šaponjac
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia; (V.T.Š.); (J.J.V.)
| | - Jolanta Sereikaitė
- Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania;
| | | | - Jelena J. Vulić
- Faculty of Technology Novi Sad, University of Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia; (V.T.Š.); (J.J.V.)
| | - Antonio J. Meléndez-Martínez
- Food Colour & Quality Laboratory, Department of Nutrition & Food Science, Facultad de Farmacia, Universidad de Sevilla, 41012 Sevilla, Spain;
- Correspondence:
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13
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Gerna D, Arc E, Holzknecht M, Roach T, Jansen-Dürr P, Weiss AK, Kranner I. AtFAHD1a: A New Player Influencing Seed Longevity and Dormancy in Arabidopsis? Int J Mol Sci 2021; 22:2997. [PMID: 33804275 PMCID: PMC8001395 DOI: 10.3390/ijms22062997] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/10/2021] [Accepted: 03/10/2021] [Indexed: 11/16/2022] Open
Abstract
Fumarylacetoacetate hydrolase (FAH) proteins form a superfamily found in Archaea, Bacteria, and Eukaryota. However, few fumarylacetoacetate hydrolase domain (FAHD)-containing proteins have been studied in Metazoa and their role in plants remains elusive. Sequence alignments revealed high homology between two Arabidopsis thaliana FAHD-containing proteins and human FAHD1 (hFAHD1) implicated in mitochondrial dysfunction-associated senescence. Transcripts of the closest hFAHD1 orthologue in Arabidopsis (AtFAHD1a) peak during seed maturation drying, which influences seed longevity and dormancy. Here, a homology study was conducted to assess if AtFAHD1a contributes to seed longevity and vigour. We found that an A. thaliana T-DNA insertional line (Atfahd1a-1) had extended seed longevity and shallower thermo-dormancy. Compared to the wild type, metabolite profiling of dry Atfahd1a-1 seeds showed that the concentrations of several amino acids, some reducing monosaccharides, and δ-tocopherol dropped, whereas the concentrations of dehydroascorbate, its catabolic intermediate threonic acid, and ascorbate accumulated. Furthermore, the redox state of the glutathione disulphide/glutathione couple shifted towards a more reducing state in dry mature Atfahd1a-1 seeds, suggesting that AtFAHD1a affects antioxidant redox poise during seed development. In summary, AtFAHD1a appears to be involved in seed redox regulation and to affect seed quality traits such as seed thermo-dormancy and longevity.
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Affiliation(s)
- Davide Gerna
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria; (E.A.); (T.R.); (I.K.)
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
| | - Erwann Arc
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria; (E.A.); (T.R.); (I.K.)
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
| | - Max Holzknecht
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
- Research Institute for Biomedical Aging Research, University of Innsbruck, Rennweg 10, 6020 Innsbruck, Austria
| | - Thomas Roach
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria; (E.A.); (T.R.); (I.K.)
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
| | - Pidder Jansen-Dürr
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
- Research Institute for Biomedical Aging Research, University of Innsbruck, Rennweg 10, 6020 Innsbruck, Austria
| | - Alexander K.H. Weiss
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
- Research Institute for Biomedical Aging Research, University of Innsbruck, Rennweg 10, 6020 Innsbruck, Austria
| | - Ilse Kranner
- Department of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria; (E.A.); (T.R.); (I.K.)
- Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck, 6020 Innsbruck, Austria; (M.H.); (P.J.-D.)
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Ciudad-Mulero M, Matallana-González MC, Cámara M, Fernández-Ruiz V, Morales P. Antioxidant Phytochemicals in Pulses and their Relation to Human Health: A Review. Curr Pharm Des 2020; 26:1880-1897. [PMID: 32013818 DOI: 10.2174/1381612826666200203130150] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 12/30/2019] [Indexed: 01/22/2023]
Abstract
Pulses are a staple food cultivated since ancient times, which play an important role in the human diet. From a nutritional point of view, pulses are very interesting foods as they are rich in proteins, carbohydrates and dietary fibre. Dietary antioxidants are a complex mixture of hydrophilic and lipophilic compounds usually present in foods of plant origin, including pulses. In the present study, the phytochemical composition of selected pulses (common beans, fava beans, lentils, chickpeas, peas and lupins) has been reviewed in terms of their content of antioxidant compounds. The content of hydrosoluble antioxidants (organic acids, phenolic compounds), liposoluble antioxidants (tocopherols, carotenoids) and other compounds which exert antioxidant properties, such as dietary fibre and minerals (zinc, selenium), has been studied, reporting that pulses are an interesting source of these compounds, which have important health benefits, including a preventing role in cardiovascular diseases, anticarcinogenic or neuroprotective properties. It is important to take into account that pulses are not usually consumed raw, but they must be processed before consumption in order to improve their nutritional quality and their palatability, therefore, the effect of different technological and heat treatments (germination, cooking, boiling, extrusion) on the antioxidant compounds present in pulses has been also reviewed. In this regard, it has been observed that as a consequence of processing, the content of phytochemicals with antioxidant properties is usually decreased, but processed pulses maintain relevant amounts of these compounds, preserving their beneficial health effect.
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Affiliation(s)
- María Ciudad-Mulero
- Department of Nutrition and Food Science, Faculty of Pharmacy, Complutense University of Madrid, Pza Ramon y Cajal, s/n. E- 28040 Madrid, Spain
| | - Mª Cruz Matallana-González
- Department of Nutrition and Food Science, Faculty of Pharmacy, Complutense University of Madrid, Pza Ramon y Cajal, s/n. E- 28040 Madrid, Spain
| | - Montaña Cámara
- Department of Nutrition and Food Science, Faculty of Pharmacy, Complutense University of Madrid, Pza Ramon y Cajal, s/n. E- 28040 Madrid, Spain
| | - Virginia Fernández-Ruiz
- Department of Nutrition and Food Science, Faculty of Pharmacy, Complutense University of Madrid, Pza Ramon y Cajal, s/n. E- 28040 Madrid, Spain
| | - Patricia Morales
- Department of Nutrition and Food Science, Faculty of Pharmacy, Complutense University of Madrid, Pza Ramon y Cajal, s/n. E- 28040 Madrid, Spain
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15
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López-Pozo M, Ballesteros D, Laza JM, García-Plazaola JI, Fernández-Marín B. Desiccation Tolerance in Chlorophyllous Fern Spores: Are Ecophysiological Features Related to Environmental Conditions? FRONTIERS IN PLANT SCIENCE 2019; 10:1130. [PMID: 31616448 PMCID: PMC6764020 DOI: 10.3389/fpls.2019.01130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 08/15/2019] [Indexed: 05/17/2023]
Abstract
Fern spores of most species are desiccation tolerant (DT) and, in some cases, are photosynthetic at maturation, the so-called chlorophyllous spores (CS). The lifespan of CS in the dry state is very variable among species. The physiological, biochemical, and biophysical mechanisms underpinning this variability remain understudied and their interpretation from an ecophysiological approach virtually unexplored. In this study, we aimed at fulfilling this gap by assessing photochemical, hydric, and biophysical properties of CS from three temperate species with contrasting biological strategies and longevity in the dry state: Equisetum telmateia (spore maturation and release in spring, ultrashort lifespan), Osmunda regalis (spore maturation and release in summer, medium lifespan), Matteuccia struthiopteris (spore maturation and release in winter, medium-long lifespan). After subjection of CS to controlled drying treatments, results showed that the three species displayed different extents of DT. CS of E. telmateia rapidly lost viability after desiccation, while the other two withstood several dehydration-rehydration cycles without compromising viability. The extent of DT was in concordance with water availability in the sporulation season of each species. CS of O. regalis and M. struthiopteris carried out the characteristic quenching of chlorophyll fluorescence, widely displayed by other DT cryptogams during drying, and had higher tocopherol and proline contents. The turgor loss point of CS is also related to the extent of DT and to the sporulation season: lowest values were found in CS of M. struthiopteris and O. regalis. The hydrophobicity of spores in these two species was higher and probably related to the prevention of water absorption under unfavorable conditions. Molecular mobility, estimated by dynamic mechanical thermal analysis, confirmed an unstable glassy state in the spores of E. telmateia, directly related to the low DT, while the DT species entered in a stable glassy state when dried. Overall, our data revealed a DT syndrome related to the season of sporulation that was characterized by higher photoprotective potential, specific hydric properties, and lower molecular mobility in the dry state. Being unicellular haploid structures, CS represent not only a challenge for germplasm preservation (e.g., as these spores are prone to photooxidation) but also an excellent opportunity for studying mechanisms of DT in photosynthetic cells.
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Affiliation(s)
- Marina López-Pozo
- Depatment of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Daniel Ballesteros
- Comparative Plant and Fungal Biology, Royal Botanic Gardens, Kew, West Sussex, United Kingdom
| | - José Manuel Laza
- Laboratory of Macromolecular Chemistry (Labquimac), Department of Physical Chemistry, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | | | - Beatriz Fernández-Marín
- Depatment of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Bilbao, Spain
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16
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Redox poise and metabolite changes in bread wheat seeds are advanced by priming with hot steam. Biochem J 2018; 475:3725-3743. [PMID: 30401685 DOI: 10.1042/bcj20180632] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/24/2018] [Accepted: 11/02/2018] [Indexed: 12/20/2022]
Abstract
Fast and uniform germination is key to agricultural production and can be achieved by seed 'priming' techniques. Here, we characterised the responses of bread wheat (Triticum aestivum L.) seeds to a hot steam treatment ('BioFlash'), which accelerated water uptake, resulting in faster germination and seedling growth, typical traits of primed seed. Before the completion of germination, metabolite profiling of seeds revealed advanced accumulation of several amino acids (especially cysteine and serine), sugars (ribose, glucose), and organic acids (glycerate, succinate) in hot steam-treated seeds, whereas sugar alcohols (e.g. arabitol, mannitol) and trehalose decreased in all seeds. Tocochromanols (the 'vitamin E family') rose independently of the hot steam treatment. We further assessed shifts in the half-cell reduction potentials of low-molecular-weight (LMW) thiol-disulfide redox couples [i.e. glutathione disulfide (GSSG)/glutathione (GSH) and cystine/cysteine], alongside the activities of the reactive oxygen species (ROS)-processing enzyme superoxide dismutase, catalase, ascorbate peroxidase, and glutathione reductase. Upon the first 4 h of imbibition, a rapid conversion of LMW disulfides to thiols occurred. Completion of germination was associated with a re-oxidation of the LMW thiol-disulfide cellular redox environment, before more reducing conditions were re-established during seedling growth, accompanied by an increase in all ROS-processing enzyme activities. Furthermore, changes in the thiol-disulfide cellular redox state were associated to specific stages of wheat seed germination. In conclusion, the priming effect of the hot steam treatment advanced the onset of seed metabolism, including redox shifts associated with germination and seedling growth.
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Effects of Aromatic Herb Flavoring on Carotenoids and Volatile Compounds in Edible Oil From Blue Sweet Lupin (Lupinus angustifolius). EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201800227] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Cuong DM, Kim JK, Jeon J, Kim TJ, Park JS, Park SU. Expression of Carotenoid Biosynthetic Genes and Carotenoid Biosynthesis during Seedling Development of Momordica charantia. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Carotenoids belong to a large group of secondary metabolites, and have pivotal roles in plants, including photosynthesis and phytohormone synthesis, pigmentation, and membrane stabilization. Additionally, carotenoids are potent antioxidants, and their health benefits are becoming increasingly prominent. In recent years, carotenoids have been studied in many plants. Furthermore, gene expression, as well as carotenoid accumulation in different parts of the bitter melon, has been investigated; however, it has not been studied in bitter melon seedlings. In this study, carotenoid accumulation and transcript levels of McGGPPS1, McGGPPS2, McPSY, McPDS, McZDS, McLCYB, McLCYE1, McLCYE2, McCXHB, and McZEP, involved in carotenoid biosynthesis, were analyzed during seedling development using HPLC and qRT-PCR. The major carotenoids that accumulated in the bitter melon seedlings were lutein and E-β-carotene. The expression of most carotenoid biosynthetic genes increased during seedling development, consistent with the accumulation of violaxanthin, lutein, zeaxanthin, β-cryptoxanthin, 13Z-β-carotene, E-β-carotene, and 9Z-β-carotene in bitter melon seedlings. The results of this study provide a firm basis for comprehending the link between gene expression and carotenoid concentration in bitter melon seedlings.
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Affiliation(s)
- Do Manh Cuong
- Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Jae Kwang Kim
- Division of Life Sciences and Convergence Research Center for Insect Vectors, Incheon National University, Incheon 22012, Korea
| | - Jin Jeon
- Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
| | - Tae Jin Kim
- Division of Life Sciences and Convergence Research Center for Insect Vectors, Incheon National University, Incheon 22012, Korea
| | - Jong Seok Park
- Department of Horticultural Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Sang Un Park
- Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Korea
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19
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Smolikova G, Dolgikh E, Vikhnina M, Frolov A, Medvedev S. Genetic and Hormonal Regulation of Chlorophyll Degradation during Maturation of Seeds with Green Embryos. Int J Mol Sci 2017; 18:E1993. [PMID: 28926960 PMCID: PMC5618642 DOI: 10.3390/ijms18091993] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 09/07/2017] [Accepted: 09/12/2017] [Indexed: 01/05/2023] Open
Abstract
The embryos of some angiosperms (usually referred to as chloroembryos) contain chlorophylls during the whole period of embryogenesis. Developing embryos have photochemically active chloroplasts and are able to produce assimilates, further converted in reserve biopolymers, whereas at the late steps of embryogenesis, seeds undergo dehydration, degradation of chlorophylls, transformation of chloroplast in storage plastids, and enter the dormancy period. However, in some seeds, the process of chlorophyll degradation remains incomplete. These residual chlorophylls compromise the quality of seed material in terms of viability, nutritional value, and shelf life, and represent a serious challenge for breeders and farmers. The mechanisms of chlorophyll degradation during seed maturation are still not completely understood, and only during the recent decades the main pathways and corresponding enzymes could be characterized. Among the identified players, the enzymes of pheophorbide a oxygenase pathway and the proteins encoded by STAY GREEN (SGR) genes are the principle ones. On the biochemical level, abscisic acid (ABA) is the main regulator of seed chlorophyll degradation, mediating activity of corresponding catabolic enzymes on the transcriptional level. In general, a deep insight in the mechanisms of chlorophyll degradation is required to develop the approaches for production of chlorophyll-free high quality seeds.
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Affiliation(s)
- Galina Smolikova
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, St. Petersburg 199034, Russia.
| | - Elena Dolgikh
- All-Russia Institute for Agricultural Microbiology, St. Petersburg State University, St. Petersburg 199034, Russia.
| | - Maria Vikhnina
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany.
- Department of Biochemistry, St. Petersburg State University, St. Petersburg 199034, Russia.
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany.
| | - Sergei Medvedev
- Department of Plant Physiology and Biochemistry, St. Petersburg State University, St. Petersburg 199034, Russia.
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