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Krylova EА, Mikhailova AS, Zinchenko YN, Perchuk IN, Razgonova MP, Khlestkina EK, Burlyaeva MO. The Content of Anthocyanins in Cowpea ( Vigna unguiculata (L.) Walp.) Seeds and Contribution of the MYB Gene Cluster to Their Coloration Pattern. PLANTS (BASEL, SWITZERLAND) 2023; 12:3624. [PMID: 37896090 PMCID: PMC10609810 DOI: 10.3390/plants12203624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/02/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023]
Abstract
The intensively pigmented legumes belonging to Phaseolus and Vigna spp. are valued as an essential component of healthy nutrition due to their high content of flavonoids. In this context, we used the accessions of Vigna unguiculata with different colors of seed coats from the N.I. Vavilov All-Russian Institute of Plant Genetic Resources collection as the main object of this research. We applied confocal laser scanning microscopy, biochemical analysis, and wide in silico and molecular genetic analyses to study the main candidate genes for anthocyanin pigmentation within the MYB cluster on chromosome 5. We performed statistical data processing. The anthocyanin content ranged from 2.96 mg/100 g DW in reddish-brown-seeded cowpea accessions to 175.16 mg/100 g DW in black-seeded ones. Laser microscopy showed that the autofluorescence in cowpea seeds was mainly caused by phenolic compounds. The maximum fluorescence was observed in the seed coat, while its dark color, due to the highest level of red fluorescence, pointed to the presence of anthocyanins and anthocyanidins. Genes of the MYB cluster on chromosome 5 demonstrated a high homology and were segregated into a separate clade. However, amplification products were not obtained for all genes because of the truncation of some genes. Statistical analysis showed a clear correlation between the high content of anthocyanins in cowpea seeds and the presence of PCR products with primers Vigun05g0393-300-1.
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Affiliation(s)
- Ekaterina А. Krylova
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
| | - Aleksandra S. Mikhailova
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
| | - Yulia N. Zinchenko
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
| | - Irina N. Perchuk
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
| | - Mayya P. Razgonova
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
- Advanced Engineering School, Institute of Biotechnology, Bioengineering and Food Systems, Far Eastern Federal University, 10 Ajax Settlement, Russky Island, 690922 Vladivostok, Russia
| | - Elena K. Khlestkina
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
| | - Marina O. Burlyaeva
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, 190000 Saint-Petersburg, Russia; (A.S.M.); (Y.N.Z.); (I.N.P.); (M.P.R.); (E.K.K.)
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Fu W, Li S, Helmick H, Hamaker BR, Kokini JL, Reddivari L. Complexation with Polysaccharides Enhances the Stability of Isolated Anthocyanins. Foods 2023; 12:foods12091846. [PMID: 37174384 PMCID: PMC10178255 DOI: 10.3390/foods12091846] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/18/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
Isolated anthocyanins have limited colonic bioavailability due to their instability as free forms. Thus, many methods have been fabricated to increase the stability of anthocyanins. Complexation, encapsulation, and co-pigmentation with other pigments, proteins, metal ions, and carbohydrates have been reported to improve the stability and bioavailability of anthocyanins. In this study, anthocyanins extracted from purple potatoes were complexed with four different polysaccharides and their mixture. The anthocyanin-polysaccharide complexes were characterized using a zeta potential analyzer, particle size analyzer, scanning electron microscopy, and Fourier-transform infrared spectroscopy. Complexes were subjected to simulated digestion for assessing the stability of anthocyanins. Furthermore, complexes were subjected to different pH conditions and incubated at high temperatures to monitor color changes. A Caco-2 cell monolayer was used to evaluate the colonic concentrations of anthocyanins. In addition, the bioactivity of complexes was assessed using LPS-treated Caco-2 cell monolayer. Results show that pectin had the best complexation capacity with anthocyanins. The surface morphology of the anthocyanin-pectin complex (APC) was changed after complexation. APC was more resistant to the simulated upper gastrointestinal digestion, and high pH and temperature conditions for a longer duration. Furthermore, APC restored the lipopolysaccharide (LPS)-induced high cell permeability compared to isolated anthocyanins. In conclusion, complexation with pectin increased the stability and colonic bioavailability and the activity of anthocyanins.
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Affiliation(s)
- Wenyi Fu
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
| | - Shiyu Li
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
| | - Harrison Helmick
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
| | - Bruce R Hamaker
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
| | - Jozef L Kokini
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
| | - Lavanya Reddivari
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
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Razgonova MP, Zinchenko YN, Kozak DK, Kuznetsova VA, Zakharenko AM, Ercisli S, Golokhvast KS. Autofluorescence-Based Investigation of Spatial Distribution of Phenolic Compounds in Soybeans Using Confocal Laser Microscopy and a High-Resolution Mass Spectrometric Approach. Molecules 2022; 27:molecules27238228. [PMID: 36500322 PMCID: PMC9735898 DOI: 10.3390/molecules27238228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/15/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
In this research, we present a detailed comparative analysis of the bioactive substances of soybean varieties k-11538 (Russia), k-11559 (Russia), k-569 (China), k-5367 (China), k-5373 (China), k-5586 (Sweden), and Primorskaya-86 (Russia) using an LSM 800 confocal laser microscope and an amaZon ion trap SL mass spectrometer. Laser microscopy made it possible to clarify in detail the spatial arrangement of the polyphenolic content of soybeans. Our results revealed that the phenolics of soybean are spatially located mainly in the seed coat and the outer layer of the cotyledon. High-performance liquid chromatography (HPLC) was used in combination with an amaZon SL BRUKER DALTONIKS ion trap (tandem mass spectrometry) to identify target analytes in soybean extracts. The results of initial studies revealed the presence of 63 compounds, and 45 of the target analytes were identified as polyphenolic compounds.
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Affiliation(s)
- Mayya P. Razgonova
- Far Eastern Experimental Station, N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
- SEC Nanotechnology, Polytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, Russia
| | - Yulia N. Zinchenko
- Far Eastern Experimental Station, N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
- SEC Nanotechnology, Polytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, Russia
| | - Darya K. Kozak
- Laboratory of Biochemistry, Blagoveshchensk State Pedagogical University, 675000 Blagoveshchensk, Russia
| | - Victoria A. Kuznetsova
- Far Eastern Experimental Station, N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
- Laboratory of Biochemistry, Blagoveshchensk State Pedagogical University, 675000 Blagoveshchensk, Russia
| | - Alexander M. Zakharenko
- Laboratory of Pesticide Toxicology, Siberian Federal Scientific Center of Agrobiotechnology RAS, 633501 Krasnoobsk, Russia
| | - Sezai Ercisli
- Department of Horticulture, Agricultural Faculty, Ataturk University, Erzurum 25240, Turkey
| | - Kirill S. Golokhvast
- Far Eastern Experimental Station, N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
- SEC Nanotechnology, Polytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, Russia
- Laboratory of Pesticide Toxicology, Siberian Federal Scientific Center of Agrobiotechnology RAS, 633501 Krasnoobsk, Russia
- Correspondence:
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ADU REY. Dye Sensitized Solar Cell (DSSC) Fabrication Using Methanol Extract of Onion Peel as a Natural Sensitizer. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2022. [DOI: 10.18596/jotcsa.1114611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Methanol extracts of onion peel waste (Allium cepa) were applied as natural sensitizer in Dye-Sensitized Solar Cell (DSSC) fabrication. This research investigated the dye characteristics of onion peel extract and its power conversion efficiency. Onion peel extraction was carried out using unacidified methanol extract (UME) and acidified methanol extract (AME). Dye absorption was characterized by UV-Vis Spectrophotometer at a wavelength of 200-800 nm and FT-IR at a wave number of 4000-500 cm-1. The power conversion efficiency of the fabricated DSSC was determined by calculating the voltage and current generated by the multimeter. The red onion peel extracts, both acidified and unacidified methanol, had maximum absorption at UV-Visible range (457, 659 and 662 nm). Onion peel extract has several functional groups such as –OH, C=O, C-O-C, C=C, and C-H aromatics- showing specific absorption corresponding to the anthocyanin structure. A solar energy conversion efficiency of η= 0.0413% was obtained from UME extract with a short circuit current of up to Jsc=0.6031 mAcm-2 and a fill factor of 0.2764.
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Razgonova MP, Burlyaeva MO, Zinchenko YN, Krylova EA, Chunikhina OA, Ivanova NM, Zakharenko AM, Golokhvast KS. Identification and Spatial Distribution of Bioactive Compounds in Seeds Vigna unguiculata (L.) Walp. by Laser Microscopy and Tandem Mass Spectrometry. PLANTS 2022; 11:plants11162147. [PMID: 36015450 PMCID: PMC9412441 DOI: 10.3390/plants11162147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 11/29/2022]
Abstract
The research presents a comparative metabolomic study of extracts of Vigna unguiculata seed samples from the collection of the N.I. Vavilov All-Russian Institute of Plant Genetic Resources. Analyzed samples related to different areas of use in agricultural production, belonging to different cultivar groups sesquipedalis (vegetable accessions) and unguiculata (grain accessions). Metabolome analysis was performed by liquid chromatography combined with ion trap mass spectrometry. Substances were localized in seeds using confocal and laser microscopy. As a result, 49 bioactive compounds were identified: flavonols, flavones, flavan-3-ols, anthocyanidin, phenolic acids, amino acids, monocarboxylic acids, aminobenzoic acids, fatty acids, lignans, carotenoid, sapogenins, steroids, etc. Steroidal alkaloids were identified in V. unguiculata seeds for the first time. The seed coat (palisade epidermis and parenchyma) is the richest in phenolic compounds. Comparison of seeds of varieties of different directions of use in terms of the number of bioactive substances identified revealed a significant superiority of vegetable accessions over grain ones in this indicator, 36 compounds were found in samples from cultivar group sesquipedalis, and 24 in unguiculata. The greatest variety of bioactive compounds was found in the vegetable accession k-640 from China.
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Affiliation(s)
- Mayya P. Razgonova
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
- Institute of Life Science and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia
- Correspondence: (M.P.R.); (K.S.G.)
| | - Marina O. Burlyaeva
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
| | - Yulia N. Zinchenko
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
| | - Ekaterina A. Krylova
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
| | - Olga A. Chunikhina
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
| | - Natalia M. Ivanova
- Department of Botany, Saint-Petersburg State University, 199034 Saint-Petersburg, Russia
| | - Alexander M. Zakharenko
- Siberian Federal Scientific Centre of Agrobiotechnology RAS, 633501 Krasnoobsk, Russia
- Laboratory of Supercritical Fluid Research and Application in Agrobiotechnology, Tomsk State University, 634050 Tomsk, Russia
| | - Kirill S. Golokhvast
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, 190000 Saint-Petersburg, Russia
- Institute of Life Science and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia
- Siberian Federal Scientific Centre of Agrobiotechnology RAS, 633501 Krasnoobsk, Russia
- Laboratory of Supercritical Fluid Research and Application in Agrobiotechnology, Tomsk State University, 634050 Tomsk, Russia
- Correspondence: (M.P.R.); (K.S.G.)
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Samota MK, Sharma M, Kaur K, Sarita, Yadav DK, Pandey AK, Tak Y, Rawat M, Thakur J, Rani H. Onion anthocyanins: Extraction, stability, bioavailability, dietary effect, and health implications. Front Nutr 2022; 9:917617. [PMID: 35967791 PMCID: PMC9363841 DOI: 10.3389/fnut.2022.917617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/17/2022] [Indexed: 11/13/2022] Open
Abstract
Anthocyanins are high-value compounds, and their use as functional foods and their natural colorant have potential health benefits. Anthocyanins seem to possess antioxidant properties, which help prevent neuronal diseases and thereby exhibit anti-inflammatory, chemotherapeutic, cardioprotective, hepatoprotective, and neuroprotective activities. They also show different therapeutic effects against various chronic diseases. Anthocyanins are present in high concentrations in onion. In recent years, although both conventional and improved methods have been used for extraction of anthocyanins, nowadays, improved methods are of great importance because of their higher yield and stability of anthocyanins. In this review, we compile anthocyanins and their derivatives found in onion and the factors affecting their stability. We also analyze different extraction techniques of anthocyanins. From this point of view, it is very important to be precisely aware of the impact that each parameter has on the stability and subsequently potentiate its bioavailability or beneficial health effects. We present up-to-date information on bioavailability, dietary effects, and health implications of anthocyanins such as antioxidant, antidiabetic, anticancerous, antiobesity, cardioprotective, and hepatoprotective activities.
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Affiliation(s)
- Mahesh Kumar Samota
- Horticulture Crop Processing (HCP) Division, ICAR-Central Institute of Post-Harvest Engineering & Technology (CIPHET), Punjab, India
| | - Madhvi Sharma
- Post Graduate Department of Biotechnology, Khalsa College, Amritsar, Punjab, India
| | - Kulwinder Kaur
- Department of Processing and Food Engineering, Punjab Agricultural University, Ludhiana, Punjab, India
| | - Sarita
- College of Agriculture, Agriculture University, Jodhpur, Rajasthan, India
| | - Dinesh Kumar Yadav
- Division of Environmental Soil Science, ICAR-Indian Institute of Soil Science (IISS), Bhopal, MP, India
| | - Abhay K Pandey
- Department of Mycology and Microbiology, Tea Research Association-North Bengal Regional R & D Center, Nagrakata, West Bengal, India
| | - Yamini Tak
- Agricultural Research Station (ARS), Agriculture University, Kota, Rajasthan, India
| | - Mandeep Rawat
- Department of Horticulture, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Julie Thakur
- Department of Botany, Bhaskaracharya College of Applied Sciences, University of Delhi, New Delhi, India
| | - Heena Rani
- Department of Biochemistry, Punjab Agricultural University, Ludhiana, Punjab, India
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Vidana Gamage GC, Lim YY, Choo WS. Anthocyanins From Clitoria ternatea Flower: Biosynthesis, Extraction, Stability, Antioxidant Activity, and Applications. FRONTIERS IN PLANT SCIENCE 2021; 12:792303. [PMID: 34975979 PMCID: PMC8718764 DOI: 10.3389/fpls.2021.792303] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 11/25/2021] [Indexed: 05/02/2023]
Abstract
Clitoria ternatea plant is commonly grown as an ornamental plant and possesses great medicinal value. Its flower is edible and also known as blue pea or butterfly pea flower. The unique feature of anthocyanins present in blue pea flowers is the high abundance of polyacylated anthocyanins known as ternatins. Ternatins are polyacylated derivatives of delphinidin 3,3',5'-triglucoside. This review covers the biosynthesis, extraction, stability, antioxidant activity, and applications of anthocyanins from Clitoria ternatea flower. Hot water extraction of dried or fresh petals of blue pea flower could be employed successfully to extract anthocyanins from blue pea flower for food application. Blue pea flower anthocyanins showed good thermal and storage stability, but less photostability. Blue pea flower anthocyanins also showed an intense blue colour in acidic pH between pH 3.2 to pH 5.2. Blue pea flower anthocyanin extracts demonstrate significant in vitro and cellular antioxidant activities. Blue pea flower anthocyanins could be used as a blue food colourant in acidic and neutral foods. The incorporation of blue pea flower anthocyanins in food increased the functional properties of food such as antioxidant and antimicrobial properties. Blue pea flower anthocyanins have also been used in intelligent packaging. A comparison of blue pea flower anthocyanins with two other natural blue colouring agents used in the food industry, spirulina or phycocyanin and genipin-derived pigments is also covered. Anthocyanins from blue pea flowers are promising natural blue food colouring agent.
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Affiliation(s)
| | | | - Wee Sim Choo
- School of Science, Monash University Malaysia, Subang Jaya, Malaysia
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Subcellular Localization and Vesicular Structures of Anthocyanin Pigmentation by Fluorescence Imaging of Black Rice ( Oryza sativa L.) Stigma Protoplast. PLANTS 2021; 10:plants10040685. [PMID: 33918111 PMCID: PMC8066712 DOI: 10.3390/plants10040685] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/22/2021] [Accepted: 03/27/2021] [Indexed: 11/23/2022]
Abstract
Anthocyanins belong to the group of flavonoid compounds broadly distributed in plant species responsible for attractive colors. In black rice (Oryza sativa L.), they are present in the stems, leaves, stigmas, and caryopsis. However, there is still no scientific evidence supporting the existence of compartmentalization and trafficking of anthocyanin inside the cells. In the current study, we took advantage of autofluorescence with anthocyanin’s unique excitation/emission properties to elucidate the subcellular localization of anthocyanin and report on the in planta characterization of anthocyanin prevacuolar vesicles (APV) and anthocyanic vacuolar inclusion (AVI) structure. Protoplasts were isolated from the stigma of black and brown rice and imaging using a confocal microscope. Our result showed the fluorescence displaying magenta color in purple stigma and no fluorescence in white stigma when excitation was provided by a helium–neon 552 nm and emission long pass 610–670 nm laser. The fluorescence was distributed throughout the cell, mainly in the central vacuole. Fluorescent images revealed two pools of anthocyanin inside the cells. The diffuse pools were largely found inside the vacuole lumen, while the body structures could be observed mostly inside the cytoplasm (APV) and slightly inside the vacuole (AVI) with different shapes, sizes, and color intensity. Based on their sizes, AVI could be grouped into small (Ф < 0.5 um), middle (Ф between 0.5 and 1 um), and large size (Ф > 1 um). Together, these results provided evidence about the sequestration and trafficking of anthocyanin from the cytoplasm to the central vacuole and the existence of different transport mechanisms of anthocyanin. Our results suggest that stigma cells are an excellent system for in vivo studying of anthocyanin in rice and provide a good foundation for understanding anthocyanin metabolism in plants, sequestration, and trafficking in black rice.
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Abdelrahman M, Ariyanti NA, Sawada Y, Tsuji F, Hirata S, Hang TTM, Okamoto M, Yamada Y, Tsugawa H, Hirai MY, Shigyo M. Metabolome-Based Discrimination Analysis of Shallot Landraces and Bulb Onion Cultivars Associated with Differences in the Amino Acid and Flavonoid Profiles. Molecules 2020; 25:molecules25225300. [PMID: 33202886 PMCID: PMC7697566 DOI: 10.3390/molecules25225300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 01/29/2023] Open
Abstract
Shallot landraces and varieties are considered an important genetic resource for Allium breeding due to their high contents of several functional metabolites. Aiming to provide new genetic materials for the development of a novel bulb onion cultivar derived from intraspecific hybrids with useful agronomic traits from shallots, the metabolic profiles in the bulbs of 8 Indonesian shallot landraces and 7 short-day and 3 long-day bulb onion cultivars were established using LC–Q-TOF-MS/MS. Principal component analysis, partial least squares discriminant analysis, and dendrogram clustering analysis showed two major groups; group I contained all shallot landraces and group II contained all bulb onion cultivars, indicating that shallots exhibited a distinct metabolic profile in comparison with bulb onions. Variable importance in the projection and Spearman’s rank correlation indicated that free and conjugated amino acids, flavonoids (especially metabolites having flavonol aglycone), and anthocyanins, as well as organic acids, were among the top metabolite variables that were highly associated with shallot landraces. The absolute quantification of 21 amino acids using conventional HPLC analysis showed high contents in shallots rather than in bulb onions. The present study indicated that shallots reprogrammed their metabolism toward a high accumulation of amino acids and flavonoids as an adaptive mechanism in extremely hot tropical environments.
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Affiliation(s)
- Mostafa Abdelrahman
- Botany Department, Faculty of Science, Aswan University, Aswan 81528, Egypt;
| | - Nur Aeni Ariyanti
- Department of Biology Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Yogyakarta 55281, Indonesia;
| | - Yuji Sawada
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; (Y.S.); (M.O.); (Y.Y.); (H.T.); (M.Y.H.)
| | - Fumitada Tsuji
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., 1-1 Suzukichō, Kawasaki-ku, Kawasaki 210-8681, Kanagawa, Japan;
| | - Sho Hirata
- Laboratory of Agroecology, Faculty of Agriculture, Kyushu University, Kasuya, Fukuoka 811-2307, Japan;
| | - Tran Thi Minh Hang
- Department of Agronomy, Vietnam National University of Agriculture, Trauqui, Gialam, Hanoi 100000, Vietnam;
| | - Mami Okamoto
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; (Y.S.); (M.O.); (Y.Y.); (H.T.); (M.Y.H.)
| | - Yutaka Yamada
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; (Y.S.); (M.O.); (Y.Y.); (H.T.); (M.Y.H.)
| | - Hiroshi Tsugawa
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; (Y.S.); (M.O.); (Y.Y.); (H.T.); (M.Y.H.)
| | - Masami Yokota Hirai
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan; (Y.S.); (M.O.); (Y.Y.); (H.T.); (M.Y.H.)
| | - Masayoshi Shigyo
- Laboratory of Vegetable Crop Science, College of Agriculture, Graduate School of Sciences and Technology for Innovation, Yamaguchi University Yamaguchi City, Yamaguchi 753-8515, Japan
- Correspondence: ; Tel.: +81-839-335-842
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