1
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McGivern BB, Cronin DR, Ellenbogen JB, Borton MA, Knutson EL, Freire-Zapata V, Bouranis JA, Bernhardt L, Hernandez AI, Flynn RM, Woyda R, Cory AB, Wilson RM, Chanton JP, Woodcroft BJ, Ernakovich JG, Tfaily MM, Sullivan MB, Tyson GW, Rich VI, Hagerman AE, Wrighton KC. Microbial polyphenol metabolism is part of the thawing permafrost carbon cycle. Nat Microbiol 2024; 9:1454-1466. [PMID: 38806673 PMCID: PMC11153144 DOI: 10.1038/s41564-024-01691-0] [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: 12/08/2023] [Accepted: 04/02/2024] [Indexed: 05/30/2024]
Abstract
With rising global temperatures, permafrost carbon stores are vulnerable to microbial degradation. The enzyme latch theory states that polyphenols should accumulate in saturated peatlands due to diminished phenol oxidase activity, inhibiting resident microbes and promoting carbon stabilization. Pairing microbiome and geochemical measurements along a permafrost thaw-induced saturation gradient in Stordalen Mire, a model Arctic peatland, we confirmed a negative relationship between phenol oxidase expression and saturation but failed to support other trends predicted by the enzyme latch. To inventory alternative polyphenol removal strategies, we built CAMPER, a gene annotation tool leveraging polyphenol enzyme knowledge gleaned across microbial ecosystems. Applying CAMPER to genome-resolved metatranscriptomes, we identified genes for diverse polyphenol-active enzymes expressed by various microbial lineages under a range of redox conditions. This shifts the paradigm that polyphenols stabilize carbon in saturated soils and highlights the need to consider both oxic and anoxic polyphenol metabolisms to understand carbon cycling in changing ecosystems.
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Affiliation(s)
- Bridget B McGivern
- Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA
| | - Dylan R Cronin
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
- Center of Microbiome Science, The Ohio State University, Columbus, OH, USA
| | - Jared B Ellenbogen
- Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA
| | - Mikayla A Borton
- Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA
| | - Eleanor L Knutson
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, USA
| | | | - John A Bouranis
- Department of Environmental Science; University of Arizona, Tucson, AZ, USA
| | - Lukas Bernhardt
- Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, USA
| | - Alma I Hernandez
- Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, USA
| | - Rory M Flynn
- Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA
| | - Reed Woyda
- Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA
| | - Alexandra B Cory
- Department of Environmental Sciences, Emory University, Atlanta, GA, USA
| | - Rachel M Wilson
- Department of Earth Ocean and Atmospheric Sciences, Florida State University, Tallahassee, FL, USA
| | - Jeffrey P Chanton
- Department of Earth Ocean and Atmospheric Sciences, Florida State University, Tallahassee, FL, USA
| | - Ben J Woodcroft
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Jessica G Ernakovich
- Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, USA
| | - Malak M Tfaily
- Department of Environmental Science; University of Arizona, Tucson, AZ, USA
| | - Matthew B Sullivan
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
- Center of Microbiome Science, The Ohio State University, Columbus, OH, USA
| | - Gene W Tyson
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Virginia I Rich
- Department of Microbiology, The Ohio State University, Columbus, OH, USA
| | - Ann E Hagerman
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH, USA
| | - Kelly C Wrighton
- Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA.
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2
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Maiuolo J, Nucera S, Serra M, Caminiti R, Oppedisano F, Macrì R, Scarano F, Ragusa S, Muscoli C, Palma E, Mollace V. Cladodes of Opuntia ficus-indica (L.) Mill. Possess Important Beneficial Properties Dependent on Their Different Stages of Maturity. PLANTS (BASEL, SWITZERLAND) 2024; 13:1365. [PMID: 38794436 PMCID: PMC11124804 DOI: 10.3390/plants13101365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/24/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Opuntia ficus-indica (L.) Mill. belongs to the Cactaceae family and the genus Opuntia; it is a succulent plant that adapts to extreme climatic conditions. The aerial part of the plant consists of the cladodes, morphological changes of branches that appear green, are covered with thorns, and are essential to reduce excessive perspiration of water. The composition of cladodes is very varied, and the main constituents are water, fibers, polysaccharides, proteins, fatty acids, vitamins, sterols, minerals, and polyphenols. Polyphenols are responsible for many beneficial activities for human health, such as antioxidant, anti-inflammatory, anticancer, and nutritional properties. The purpose of this manuscript was to compare the properties of cladodes belonging to the same plant but with different stages of maturity. Relative extracts were tested both in vitro and on a cell line and antioxidant and anti-apoptotic properties were found. The antioxidant activity was tested by the Oxygen Radical Absorbance Capacity (ORAC) test, the 1,1-diphenyl-2-picrylhydrazil (DPPH) test, and the measurement of cellular accumulation of reactive oxygen species (ROS). Anti-apoptotic activity was evaluated by the annexin/PI assay and measurement of caspases 9 and 3 expression. The results obtained showed that the extracts considered possess antioxidant and anti-apoptotic properties. However, the different stages of maturity of cladodes are essential for the performance of both functions. In addition, important variations were made in the dissolution of the extracts that brought greater safety in their use. In conclusion, this manuscript provides further information on cladodes of Opuntia ficus-indica, which can be used as adjuvants in many human pathologies.
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Affiliation(s)
- Jessica Maiuolo
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Saverio Nucera
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Maria Serra
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Rosamaria Caminiti
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Francesca Oppedisano
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Roberta Macrì
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Federica Scarano
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Salvatore Ragusa
- PLANTA/Research, Documentation and Training Center, Via Serraglio Vecchio 28, 90123 Palermo, Italy;
| | - Carolina Muscoli
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Ernesto Palma
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
| | - Vincenzo Mollace
- IRC-FSH Center, Department of Health Sciences, University “Magna Græcia” of Catanzaro, Germaneto, 88100 Catanzaro, Italy; (S.N.); (M.S.); (R.C.); (F.O.); (R.M.); (F.S.); (C.M.); (E.P.); (V.M.)
- Fondazione R. Dulbecco, 88046 Lamezia Terme, Italy
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3
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Rubert-Nason KF, Yang P, Morrow CJ, Lindroth RL. Environment and Genotype Influence Quantitative and Qualitative Variation in Condensed Tannins in Aspen. J Chem Ecol 2023; 49:325-339. [PMID: 37183205 DOI: 10.1007/s10886-023-01430-5] [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: 01/15/2023] [Revised: 03/08/2023] [Accepted: 04/16/2023] [Indexed: 05/16/2023]
Abstract
Condensed tannins (CTs) are abundant, ecologically-relevant secondary metabolites in many plants, which respond to variables associated with anthropogenic environmental change. While many studies have reported how genetic and environmental factors affect CT concentrations, few have explored how they influence CT molecular structure. Here, using trembling aspen (Populus tremuloides) as a model organism, we report how foliar CT concentrations, polymer sizes, representation of procyanidins and prodelphinidins, and stereochemistry vary in response to changes in air temperature (warming and freeze damage), air composition (elevated CO2 and O3), soil quality (nutrients and microbiome), and herbivory (mammal and lepidopteran). Use of multiple aspen genotypes enabled assessment of genetic influences on aspen CTs. CT concentration and composition were analyzed by thiolysis-ultra high performance liquid chromatography/mass spectrometry in archived leaf samples from prior experiments. All environmental variables explored except for soil microbiome influenced both CT quantity and quality, with climate factors appearing to have larger effect magnitudes than herbivory. Climate, soil, and herbivory effects varied among genotypes, while air composition effects were consistent across genotypes. Considering that CT properties (concentrations and molecular structures) mediate functions at the organismal through ecosystem scales, intraspecific variation in responses of CT properties to environmental factors could provide a pathway through which environmental change exerts selective pressure on Populus populations. Future studies are needed to identify the molecular-level mechanisms by which environmental factors influence CT concentrations and structures, and to establish their ecological and evolutionary significance.
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Affiliation(s)
- Kennedy F Rubert-Nason
- Dept. of Entomology, University of Wisconsin - Madison, 1630 Linden Drive, Madison, WI, 53706, USA.
- Division of Natural Sciences, University of Maine - Fort Kent, 23 University Drive, Fort Kent, ME, 04743, USA.
| | - Phia Yang
- Dept. of Zoology, University of Wisconsin - Madison, 1630 Linden Drive, Madison, WI, 53706, USA
| | - Clay J Morrow
- Dept. of Entomology, University of Wisconsin - Madison, 1630 Linden Drive, Madison, WI, 53706, USA
| | - Richard L Lindroth
- Dept. of Entomology, University of Wisconsin - Madison, 1630 Linden Drive, Madison, WI, 53706, USA
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4
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Castillo-Mendoza E, Zamilpa A, González-Cortazar M, Ble-González EA, Tovar-Sánchez E. Chemical Constituents and Their Production in Mexican Oaks ( Q. Rugosa, Q. Glabrescens and Q. Obtusata). PLANTS (BASEL, SWITZERLAND) 2022; 11:2610. [PMID: 36235477 PMCID: PMC9573139 DOI: 10.3390/plants11192610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/28/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Mexico is considered one of the main regions of diversification of the genus Quercus (oaks). Oak species are one of the most important tree groups, particularly in temperate forests, due to its diversity and abundance. Some studies have shown that oak contains specialized metabolites with medicinal importance. In this work, the acetonic extract from leaves of three Mexican oaks (Quercus rugosa, Q. glabrescens, and Q. obtusata) was separated using thin-layer chromatography and column chromatography. Chemical identification of the major compounds was determined using high-performance liquid chromatography and nuclear magnetic resonance. Nineteen compounds were identified, three belonging to the terpenoid family (ursolic acid, β-amyrin, and β-sitosterol) and 16 from the phenolic family. Of the isolated compounds, seven are new reports for oak species (scopoletin, ursolic acid, β-amyrin, luteolin-7-O-glucoside, kaempferol-3-O-sophoroside, kaempferol-3-O-glucoside, and kaempferol-3-O-sambubioside). More compounds were identified in Q. rugosa followed by Q. glabrescens and then Q. obtusata. The characterization of specialized metabolites in oak species is relevant, from both phytocentric and anthropocentric perspectives.
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Affiliation(s)
- Elgar Castillo-Mendoza
- Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Morelos, Mexico
| | - Alejandro Zamilpa
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1, Col. Centro, Xochitepec 62790, Morelos, Mexico
| | - Manasés González-Cortazar
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social, Argentina No. 1, Col. Centro, Xochitepec 62790, Morelos, Mexico
| | - Ever A. Ble-González
- División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Carretera Cunduacán-Jalpa Km. 0.5, Cunduacán 86690, Tabasco, Mexico
| | - Efraín Tovar-Sánchez
- Centro de Investigación en Biodiversidad y Conservación, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Morelos, Mexico
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5
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Brillouet JM, Romieu C, Bacilieri R, Nick P, Trias-Blasi A, Maul E, Solymosi K, Teszlák P, Jiang JF, Sun L, Ortolani D, Londo JP, Gutierrez B, Prins B, Reynders M, Van Caekenberghe F, Maghradze D, Marchal C, Sultan A, Thomas JF, Scherberich D, Fulcrand H, Roumeas L, Billerach G, Salimov V, Musayev M, Ejaz Ul Islam Dar M, Peltier JB, Grisoni M. Tannin phenotyping of the Vitaceae reveals a phylogenetic linkage of epigallocatechin in berries and leaves. ANNALS OF BOTANY 2022; 130:159-171. [PMID: 35700109 PMCID: PMC9445598 DOI: 10.1093/aob/mcac077] [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: 12/04/2021] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND AND AIMS Condensed tannins, responsible for berry and wine astringency, may have been selected during grapevine domestication. This work examines the phylogenetic distribution of condensed tannins throughout the Vitaceae phylogenetic tree. METHODS Green berries and mature leaves of representative true-to-type members of the Vitaceae were collected before 'véraison', freeze-dried and pulverized, and condensed tannins were measured following depolymerization by nucleophilic addition of 2-mercaptoethanol to the C4 of the flavan-3-ol units in an organic acidic medium. Reaction products were separated and quantified by ultrahigh pressure liquid chromatography/diode array detection/mass spectrometry. KEY RESULTS AND CONCLUSIONS The original ability to incorporate epigallocatechin (EGC) into grapevine condensed tannins was lost independently in both the American and Eurasian/Asian branches of the Vitaceae, with exceptional cases of reversion to the ancestral EGC phenotype. This is particularly true in the genus Vitis, where we now find two radically distinct groups differing with respect to EGC content. While Vitis species from Asia are void of EGC, 50 % of the New World Vitis harbour EGC. Interestingly, the presence of EGC is tightly coupled with the degree of leaf margin serration. Noticeably, the rare Asian EGC-forming species are phylogenetically close to Vitis vinifera, the only remnant representative of Vitis in Eurasia. Both the wild ancestral V. vinifera subsp. sylvestris as well as the domesticated V. vinifera subsp. sativa can accumulate EGC and activate galloylation biosynthesis that compete for photoassimilates and reductive power.
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Affiliation(s)
| | | | - Roberto Bacilieri
- INRA, Equipe DAAV, UMR AGAP (Univ. Montpellier, CIRAD, INRAE, SupAgro), Montpellier, France
| | - Peter Nick
- Karlsruhe Institute of Technology, Botanical Institute, Molecular Cell Biology, Karlsruhe, Germany
| | | | - Erika Maul
- Julius Kühn-Institut (JKI), Institut für Rebenzüchtung Geilweilerhof, Siebeldingen, Germany
| | - Katalin Solymosi
- Department of Plant Anatomy, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Peter Teszlák
- Department of Viticulture and Technology Development, Research Institute of Viticulture and Oenology, University of Pécs, Pécs, Hungary
| | - Jiang-Fu Jiang
- Zhengzhou Fruit Research Institute, Zhengzhou, Henan, PR China
| | - Lei Sun
- Zhengzhou Fruit Research Institute, Zhengzhou, Henan, PR China
| | | | - Jason P Londo
- USDA, Grape Genetics Research Unit, Agricultural Research Service, Geneva, New York, NY, USA
| | - Ben Gutierrez
- USDA, Plant Genetic Resources Unit, Agricultural Research Service, Geneva, New York, NY, USA
| | - Bernard Prins
- USDA, Nat’l Clonal Germplasm Rep – Tree Fruit & Nut Crops & Grapes, University of California, Davis, California, USA
| | | | | | | | - Cecile Marchal
- INRA, Grapevine Biological Resources Center, Experimental Unit of Domaine de Vassal, Marseillan-plage, France
| | - Amir Sultan
- National Herbarium (Stewart Collection), National Agricultural Research Centre, Islamabad, Pakistan
| | | | | | | | | | | | - Vugar Salimov
- Azerbaijani Scientific Research Institute of Viticulture and Winemaking, Baku, Azerbaijan
| | - Mirza Musayev
- Genetic Resources Institute of the Azerbaijan National Academy of Sciences, Baku, Azerbaijan
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6
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Verma S, Salminen JP, Taube F, Malisch CS. Large Inter- and Intraspecies Variability of Polyphenols and Proanthocyanidins in Eight Temperate Forage Species Indicates Potential for Their Exploitation as Nutraceuticals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:12445-12455. [PMID: 34662108 DOI: 10.1021/acs.jafc.1c03898] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Substantial efforts have been made in incorporating tannin-rich forages into grassland-based livestock production systems. However, the structural and functional diversity of tannins in different species limits their potential use at the field scale. We conducted a greenhouse experiment with 17 cultivars from 8 forage species and their cultivars. Ultraperformance liquid chromatography tandem mass spectrometry was used to analyze their polyphenolic profile and proanthocyanidin (PA) structural features in leaves. Our results highlight large inter- and intraspecies variability of plants in terms of polyphenol and tannin concentrations in the leaves. A concomitant and significant variation was also registered in the structural features of PA-rich forages such as the mean degree of polymerization and prodelphinidin percentage. The concentration of PA also varied within plant organs; the highest concentration was in flowers, but leaves had the highest contribution to harvestable PA biomass. Our research highlights that identifying these variations helps in identifying the representativeness of bioactivity and provides the basis for targeted breeding programs.
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Affiliation(s)
- Supriya Verma
- Grass and Forage Science/Organic Agriculture, Christian-Albrechts-Universität zu Kiel, 24118 Kiel, Germany
| | - Juha-Pekka Salminen
- Natural Chemistry Research Group, Department of Chemistry, University of Turku, Vatselankatu 2, FI-20014 Turku, Finland
| | - Friedhelm Taube
- Grass and Forage Science/Organic Agriculture, Christian-Albrechts-Universität zu Kiel, 24118 Kiel, Germany
- Grass Based Dairy Systems, Animal Production Systems Group, Wageningen University (WUR), 6708 PB Wageningen, The Netherlands
| | - Carsten S Malisch
- Grass and Forage Science/Organic Agriculture, Christian-Albrechts-Universität zu Kiel, 24118 Kiel, Germany
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7
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Thitz P, Hagerman AE, Randriamanana TR, Virjamo V, Kosonen M, Lännenpää M, Nyman T, Mehtätalo L, Kontunen‐Soppela S, Julkunen‐Tiitto R. Genetic modification of the flavonoid pathway alters growth and reveals flexible responses to enhanced UVB - Role of foliar condensed tannins. PLANT-ENVIRONMENT INTERACTIONS (HOBOKEN, N.J.) 2021; 2:1-15. [PMID: 37283848 PMCID: PMC10168092 DOI: 10.1002/pei3.10036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 12/04/2020] [Accepted: 12/06/2020] [Indexed: 06/08/2023]
Abstract
Accumulation of certain phenolics is a well-known response of plants to enhanced UVB radiation (280-315 nm), but few experiments have compared the relative importance of different phenolic groups for UVB resilience. To study how an altered phenolic profile affects the responses and resilience of silver birch (Betula pendula) to enhanced UVB, we used RNA interference (RNAi) targeting dihydroflavonol reductase (DFR), anthocyanidin synthase (ANS), or anthocyanidin reductase (ANR) to change the accumulation of phenolics. The unmodified control line and RNAi-modified plants were grown for 51 days under ambient or +32% enhanced UVB dose in a greenhouse. RNAi greatly affected phenolic profile and plant growth. There were no interactive effects of RNAi and UVB on growth or photosynthesis, which indicates that the RNAi and unmodified control plants were equally resilient. UVB enhancement led to an accumulation of foliar flavonoids and condensed tannins, and an increase in the density of stem glands and glandular trichomes on upper leaf surfaces in both the control and RNAi-modified plants. Our results do not indicate a photoprotective role for condensed tannins. However, decreased growth of high-flavonoid low-tannin DFRi and ANRi plants implies that the balance of flavonoids and condensed tannins might be important for normal plant growth.
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Affiliation(s)
- Paula Thitz
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
| | - Ann E. Hagerman
- Department of Chemistry and BiochemistryMiami UniversityOxfordOHUSA
| | - Tendry R. Randriamanana
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
| | - Virpi Virjamo
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
- Present address:
School of Forest SciencesUniversity of Eastern FinlandJoensuuFinland
| | - Minna Kosonen
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
- Present address:
Natural Resources Institute FinlandMikkeliFinland
| | - Mika Lännenpää
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
- Present address:
Biocarelia Research LaboratoryJuurikkaFinland
| | - Tommi Nyman
- Department of Ecosystems in the Barents RegionNorwegian Institute of Bioeconomy ResearchSvanvikNorway
| | - Lauri Mehtätalo
- School of ComputingUniversity of Eastern FinlandJoensuuFinland
| | - Sari Kontunen‐Soppela
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
| | - Riitta Julkunen‐Tiitto
- Department of Environmental and Biological SciencesUniversity of Eastern FinlandJoensuuFinland
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8
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Reeves SG, Somogyi A, Zeller WE, Ramelot TA, Wrighton KC, Hagerman AE. Proanthocyanidin Structural Details Revealed by Ultrahigh Resolution FT-ICR MALDI-Mass Spectrometry, 1H- 13C HSQC NMR, and Thiolysis-HPLC-DAD. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:14038-14048. [PMID: 33170695 DOI: 10.1021/acs.jafc.0c04877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Proanthocyanidins (condensed tannins) are important in food chemistry, agriculture, and health, driving demand for improvements in structure determination. We used ultrahigh resolution Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) methods to determine the exact composition of individual species in heterogeneous mixtures of proanthocyanidin polymers from Sorghum bicolor grain and Neptunia lutea leaves. Fragmentation patterns obtained with FT-ICR ESI MS-MS (electrospray ionization) confirmed structural details from thiolysis-high-performance liquid chromatography (HPLC)-diode array detection (DAD) and 1H-13C heteronuclear single quantum coherence (HSQC) NMR. We found that A-type linkages were characteristic of shorter polymers in predominantly B-linked proanthocyanidin. We suggest that supramolecular complex formation between proanthocyanidins and matrix components such as 2,5-dihydroxybenzoic acid was responsible for anomalous 152 dalton peaks, incorrectly assigned as 3-O-galloylation, when using FT-ICR matrix-assisted laser desorption ionization (MALDI-MS). Our data illustrate the power of the ultrahigh resolution FT-ICR methods but include the caveat that MALDI-MS must be paired with complementary analytical tools to avoid artifacts.
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Affiliation(s)
- Savanah G Reeves
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Arpad Somogyi
- Campus Chemical Instrument Center, Mass Spectrometry and Proteomics Facility, The Ohio State University, Columbus, Ohio 43210, United States
| | - Wayne E Zeller
- ARS-USDA, U.S. Dairy Forage Research Center, Madison, Wisconsin 53706, United States
| | - Theresa A Ramelot
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Kelly C Wrighton
- Soil & Crop Sciences, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ann E Hagerman
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States
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9
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Derba-Maceluch M, Amini F, Donev EN, Pawar PMA, Michaud L, Johansson U, Albrectsen BR, Mellerowicz EJ. Cell Wall Acetylation in Hybrid Aspen Affects Field Performance, Foliar Phenolic Composition and Resistance to Biological Stress Factors in a Construct-Dependent Fashion. FRONTIERS IN PLANT SCIENCE 2020; 11:651. [PMID: 32528503 PMCID: PMC7265884 DOI: 10.3389/fpls.2020.00651] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 04/27/2020] [Indexed: 05/03/2023]
Abstract
The production of biofuels and "green" chemicals from the lignocellulose of fast-growing hardwood species is hampered by extensive acetylation of xylan. Different strategies have been implemented to reduce xylan acetylation, resulting in transgenic plants that show good growth in the greenhouse, improved saccharification and fermentation, but the field performance of such plants has not yet been reported. The aim of this study was to evaluate the impact of reduced acetylation on field productivity and identify the best strategies for decreasing acetylation. Growth and biological stress data were evaluated for 18 hybrid aspen lines with 10-20% reductions in the cell wall acetyl content from a five year field experiment in Southern Sweden. The reduction in acetyl content was achieved either by suppressing the process of acetylation in the Golgi by reducing expression of REDUCED WALL ACETYLATION (RWA) genes, or by post-synthetic acetyl removal by fungal acetyl xylan esterases (AXEs) from two different families, CE1 and CE5, targeting them to cell walls. Transgene expression was regulated by either a constitutive promoter (35S) or a wood-specific promoter (WP). For the majority of transgenic lines, growth was either similar to that in WT and transgenic control (WP:GUS) plants, or slightly reduced. The slight reduction was observed in the AXE-expressing lines regulated by the 35S promoter, not those with the WP promoter which limits expression to cells developing secondary walls. Expressing AXEs regulated by the 35S promoter resulted in increased foliar arthropod chewing, and altered condensed tannins and salicinoid phenolic glucosides (SPGs) profiles. Greater growth inhibition was observed in the case of CE5 than with CE1 AXE, and it was associated with increased foliar necrosis and distinct SPG profiles, suggesting that CE5 AXE could be recognized by the pathogen-associated molecular pattern system. For each of three different constructs, there was a line with dwarfism and growth abnormalities, suggesting random genetic/epigenetic changes. This high frequency of dwarfism (17%) is suggestive of a link between acetyl metabolism and chromatin function. These data represent the first evaluation of acetyl-reduced plants from the field, indicating some possible pitfalls, and identifying the best strategies, when developing highly productive acetyl-reduced feedstocks.
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Affiliation(s)
- Marta Derba-Maceluch
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Fariba Amini
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå, Sweden
- Biology Department, Faculty of Science, Arak University, Arak, Iran
| | - Evgeniy N. Donev
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Prashant Mohan-Anupama Pawar
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Lisa Michaud
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå, Sweden
| | - Ulf Johansson
- Tönnersjöheden Experimental Forest, Swedish University of Agricultural Sciences, Simlångsdalen, Sweden
| | | | - Ewa J. Mellerowicz
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden
- *Correspondence: Ewa J. Mellerowicz,
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10
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Rubert-Nason KF, Lindroth RL. Analysis of condensed tannins in Populus spp. using reversed phase UPLC-PDA-(-)esi-MS following thiolytic depolymerisation. PHYTOCHEMICAL ANALYSIS : PCA 2019; 30:257-267. [PMID: 30548354 DOI: 10.1002/pca.2810] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/28/2018] [Accepted: 10/29/2018] [Indexed: 05/28/2023]
Abstract
INTRODUCTION Condensed tannins (CTs) are proanthocyanidin heteropolymers that are widely distributed among plants. Their biochemical properties are determined by molecular structure (e.g. polymer size, hydroxylation, stereochemistry). In Populus, genetically and environmentally-determined CT concentrations have been related to ecological effects, while the potential role of CT molecular structure has received little attention. OBJECTIVE Evaluate CT polymerisation, major constituent monomers, stereochemistry and overall content in Populus tremuloides foliage using ultra-high-performance liquid chromatography with photodiode array and mass spectrometry (UPLC-PDA-(-)esi-MS) detection following thiolytic depolymerisation of the CTs. METHODOLOGY CTs were extracted from dried foliage of six P. tremuloides genotypes into methanol and thiolytically depolymerised into constituent monomers. Calibration standards were prepared by thiolysis of CT mixtures isolated from P. tremuloides foliage on Sephadex LH-20, followed by preparative high-performance liquid chromatography (HPLC). RESULTS Populus tremuloides CTs contained predominantly repeating subunits of three putative stereoisomers each of catechin and gallocatechin. Linear calibrations for standards of these subunits and their thioethers (purities 44-87%, UPLC-(-)esi-MS) were generally stable over the course of 10 months. CT polymer size, hydroxylation, stereochemistry and concentrations differed among genotypes. CONCLUSION This thiolysis-UPLC-PDA-(-)esiMS method was optimised for analysis of CT polymer size, hydroxylation, stereochemistry, and total concentration in Populus foliage. It revealed significant variation in each of these properties among P. tremuloides genotypes, and will facilitate evaluation of how environmental factors affect CT molecular structures.
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Affiliation(s)
| | - Richard L Lindroth
- Department of Entomology, University of Wisconsin-Madison, Madison, WI, USA
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11
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Naumann H, Sepela R, Rezaire A, Masih SE, Zeller WE, Reinhardt LA, Robe JT, Sullivan ML, Hagerman AE. Relationships between Structures of Condensed Tannins from Texas Legumes and Methane Production During In Vitro Rumen Digestion. Molecules 2018; 23:E2123. [PMID: 30142930 PMCID: PMC6225215 DOI: 10.3390/molecules23092123] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/14/2018] [Accepted: 08/21/2018] [Indexed: 11/24/2022] Open
Abstract
Previous studies showed that a series of purified condensed tannins (CTs) from warm-season perennial legumes exhibited high variability in their modulation of methane production during in vitro rumen digestion. The molecular weight differences between these CTs did not provide correlation with either the in vitro CH₄ production or the ability to precipitate bovine serum albumin. In an effort to delineate other structure-activity relationships from these methane abatement experiments, the structures of purified CTs from these legumes were assessed with a combination of methanolysis, quantitative thiolysis, ¹H-13C HSQC NMR spectroscopy and ultrahigh-resolution MALDI-TOF MS. The composition of these CTs is very diverse: procyanidin/prodelphinidin (PC/PD) ratios ranged from 98/2 to 2/98; cis/trans ratios ranged from 98/2 to 34/66; mean degrees of polymerization ranged from 6 to 39; and % galloylation ranged from 0 to 75%. No strong correlation was observed between methane production and the protein precipitation capabilities of the CT towards three different proteins (BSA, lysozyme, and alfalfa leaf protein) at ruminal pH. However, a strong non-linear correlation was observed for the inhibition of methane production versus the antioxidant activity in plant sample containing typical PC- and PD-type CTs. The modulation of methane production could not be correlated to the CT structure (PC/PD or cis/trans ratios and extent of galloylation). The most active plant in methane abatement was Acacia angustissima, which contained CT, presenting an unusual challenge as it was resistant to standard thiolytic degradation conditions and exhibited an atypical set of cross-peak signals in the 2D NMR. The MALDI analysis supported a 5-deoxy flavan-3-ol-based structure for the CT from this plant.
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Affiliation(s)
- Harley Naumann
- Division of Plant Sciences, University of Missouri, 110 Waters, Columbia, MO 65211, USA.
| | - Rebecka Sepela
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA.
| | - Aira Rezaire
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA.
| | - Sonia E Masih
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA.
| | - Wayne E Zeller
- USDA-ARS, U.S. Dairy Forage Research Center, Madison, WI 53706, USA.
| | | | - Jamison T Robe
- USDA-ARS, U.S. Dairy Forage Research Center, Madison, WI 53706, USA.
| | | | - Ann E Hagerman
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA.
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12
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Zhang Y, Hu W, Peng X, Sun B, Wang X, Tang H. Characterization of anthocyanin and proanthocyanidin biosynthesis in two strawberry genotypes during fruit development in response to different light qualities. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 186:225-231. [PMID: 30092558 DOI: 10.1016/j.jphotobiol.2018.07.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/17/2018] [Accepted: 07/24/2018] [Indexed: 12/14/2022]
Abstract
LED-based light sources that can provide narrowly-centered spectrum have been frequently applied to manipulate the plant growth, development and metabolism in recent years. This study aimed to find out the effect of different light qualities on the production of anthocyanins and proanthocyanidins. The results showed RL (red light), BL (blue light), RBL (red light: blue light = 1:1) induced the strawberry fruit coloration earlier by increasing the content of total anthocyanins as a result of high expression of related genes, which was also concluded from a⁎, C⁎, h° values in 'Tokun' at 28 DAF, and RBL significantly promoted anthocyanin and proanthocyanidin biosynthesis in these two strawberry genotypes during fruit development. Simultaneously, the contents of anthocyanins and proanthocyanidins in 'Toyonaka' were also remarkably upregulated by BL and RL, respectively, indicating different strawberry genotypes to some extent probably had a distinct response to light quality. Hence, genotype factor should be taken into consideration when supplement of light quality was used as practical application in strawberry cultivation. Taken together, this study provided an insight into a further understanding of roles of light quality in the color formation for strawberry and a potential means to increase the health-related values of strawberry through altering the anthocyanin and proanthocyanidin contents of the fruit.
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Affiliation(s)
- Yunting Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Wenjie Hu
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaorui Peng
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaorong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China; Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
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13
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Wiesneth S, Aas G, Heilmann J, Jürgenliemk G. Investigation of the flavan-3-ol patterns in willow species during one growing-season. PHYTOCHEMISTRY 2018; 145:26-39. [PMID: 29059537 DOI: 10.1016/j.phytochem.2017.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 08/18/2017] [Accepted: 10/08/2017] [Indexed: 05/25/2023]
Abstract
Flavonoids, proanthocyanidins (PAs) and salicylic alcohol derivatives are the main groups of ingredients in Salix needed as defensive tools and signal molecules, but have also pharmaceutical importance. The present study investigated total PA content, complete PA pattern, the oligomeric/total PAs quotient and the contents of catechin and epicatechin during one growing-season for the leaves and this year's sprouts in ten willows (Salix pentandra L. ♂, S. alba L. ♂, S. fragilis L. ♀, S. caprea L. ♂ & ♀, S. cinerea L. ♂, S. caprea x cinerea ♂, S. daphnoidesVill. ♂ & ♀ and S. purpurea L. ♀; all Salicaceae). Comparison of the different species revealed distinct seasonal fluctuations of the oligomeric and polymeric PA fractions, but the contents of both groups always developed in the same direction. All willows prefer the synthesis of PAs with DP-2 - DP-4 within the oligomeric fraction (DP-2 - DP-10) and species with rather low PA contents like S. purpurea (0.1-2.6 mg/g) as well as species with rather high PA contents like S. alba (3.8-14.7 mg/g) were found. Only slight gender specific differences could be observed for both sexes of S. daphnoides and S. caprea. The PA pattern of the hybrid S. caprea x cinerea seems to be influenced by both parents. Thus, the accumulation of the oligomeric PAs accorded to S. caprea and the polymeric PAs matched S. cinerea resulting in an overall depression of PAs in the sprouts and a varying seasonal trend in the leaves. In contrast, the content of catechin remained high and seemed to be not influenced in the hybrid. Although only one individual of each Salix species could be considered in this screening study, the present results demonstrate the variability of the flavan-3-ol pattern within the genus Salix but also some preliminary correlations could be observed. Future studies with more Salix species will provide more insights into chemotaxonomic correlations.
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Affiliation(s)
- Stefan Wiesneth
- Institute of Pharmaceutical Biology, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany
| | - Gregor Aas
- Ecological-Botanical Gardens, University of Bayreuth, D-95440 Bayreuth, Germany
| | - Jörg Heilmann
- Institute of Pharmaceutical Biology, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany
| | - Guido Jürgenliemk
- Institute of Pharmaceutical Biology, University of Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany.
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14
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Marsh KJ, Kulheim C, Blomberg SP, Thornhill AH, Miller JT, Wallis IR, Nicolle D, Salminen JP, Foley WJ. Genus-wide variation in foliar polyphenolics in eucalypts. PHYTOCHEMISTRY 2017; 144:197-207. [PMID: 28957714 DOI: 10.1016/j.phytochem.2017.09.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 09/18/2017] [Accepted: 09/20/2017] [Indexed: 05/11/2023]
Abstract
Many studies quantify total phenolics or total tannins, but understanding the ecological role of polyphenolic secondary metabolites requires at least an understanding of the diversity of phenolic groups present. We used UPLC-MS/MS to measure concentrations of different polyphenol groups - including the four most common tannin groups, the three most common flavonoid groups, and quinic acid derivatives - in foliage from 628 eucalypts from the genera Eucalyptus, Angophora and Corymbia. We also tested for phylogenetic signal in each of the phenolic groups. Many eucalypts contained high concentrations of polyphenols, particularly ellagitannins, which have been relatively poorly studied, but may possess strong oxidative activity. Because the biosynthetic pathways of many phenolic compounds share either precursors or enzymes, we found negative correlations between the concentrations of several of the constituents that we measured, including proanthocyanidins (PAs) and hydrolysable tannins (HTs), HTs and flavonol derivatives, and HTs and quinic acid derivatives. We observed moderate phylogenetic signal in all polyphenol constituents, apart from the concentration of the prodelphinidin subunit of PAs and the mean degree of polymerisation of PAs. These two traits, which have previously been shown to be important in determining plants' protein precipitation capacity, may have evolved under selection, perhaps in response to climate or herbivore pressure. Hence, the signature of evolutionary history appears to have been erased for these traits. This study is an important step in moving away from analysing "totals" to a better understanding of how phylogenetic effects influence phenolic composition, and how this in turn influences ecological processes.
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Affiliation(s)
- Karen J Marsh
- Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia.
| | - Carsten Kulheim
- Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
| | - Simon P Blomberg
- School of Biological Sciences, University of Queensland, St Lucia, 4072, Australia
| | - Andrew H Thornhill
- Centre for Australian National Biodiversity Research, CSIRO National Research Collections, GPO Box 1600, Canberra, ACT, 2601, Australia; Australian Tropical Herbarium, James Cook University, Cairns, QLD, 4870, Australia
| | - Joseph T Miller
- Centre for Australian National Biodiversity Research, CSIRO National Research Collections, GPO Box 1600, Canberra, ACT, 2601, Australia; Office of International Science and Engineering, National Science Foundation, Arlington, VA, 22230, USA
| | - Ian R Wallis
- Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
| | - Dean Nicolle
- Currency Creek Arboretum, PO Box 808, Melrose Park, SA, 5039, Australia
| | - Juha-Pekka Salminen
- Natural Chemistry Research Group, Department of Chemistry, University of Turku, FI-20500, Turku, Finland
| | - William J Foley
- Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
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15
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Shay PE, Trofymow JA, Constabel CP. An improved butanol-HCl assay for quantification of water-soluble, acetone:methanol-soluble, and insoluble proanthocyanidins (condensed tannins). PLANT METHODS 2017; 13:63. [PMID: 28775761 PMCID: PMC5539752 DOI: 10.1186/s13007-017-0213-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/23/2017] [Indexed: 05/14/2023]
Abstract
BACKGROUND Condensed tannins (CT) are the most abundant secondary metabolite of land plants and can vary in abundance and structure according to tissue type, species, genotype, age, and environmental conditions. Recent improvements to the butanol-HCl assay have separately helped quantification of soluble and insoluble CTs, but have not yet been applied jointly. Our objectives were to combine previous assay improvements to allow for quantitative comparisons of different condensed tannin forms and to test protocols for analyses of condensed tannins in vegetative plant tissues. We also tested if the improved butanol-HCl assay can be used to quantify water-soluble forms of condensed tannins. RESULTS Including ~50% acetone in both extraction solvents and final assay reagents greatly improved the extraction and quantification of soluble, insoluble and total condensed tannins. The acetone-based method also extended the linear portion of standard integration curves allowing for more accurate quantification of samples with a broader range of condensed tannin concentrations. Estimates of tannin concentrations determined using the protocol without acetone were lower, but correlated with values from acetone-based methods. With the improved assay, quantification of condensed tannins in water-soluble forms was highly replicable. The relative abundance of condensed tannins in soluble and insoluble forms differed substantially between tissue types. CONCLUSIONS The quantification of condensed tannins using the butanol-HCl assay was improved by adding acetone to both extraction and reagent solutions. These improvements will facilitate the quantification of total condensed tannin in tissues containing a range of concentrations, as well as to determine the amount in water-soluble, acetone:MeOH-soluble and insoluble forms. Accurate determination of these three condensed tannin forms is essential for careful investigations of their potentially different physiological and ecological functions.
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Affiliation(s)
- Philip-Edouard Shay
- Department of Biology & Centre for Forest Biology, University of Victoria, P.O. Box 3020, STN CSC, Victoria, BC V8W 3N5 Canada
| | - J. A. Trofymow
- Department of Biology & Centre for Forest Biology, University of Victoria, P.O. Box 3020, STN CSC, Victoria, BC V8W 3N5 Canada
- Pacific Forestry Centre, Canadian Forest Service, Natural Resources Canada, Victoria, BC Canada
| | - C. Peter Constabel
- Department of Biology & Centre for Forest Biology, University of Victoria, P.O. Box 3020, STN CSC, Victoria, BC V8W 3N5 Canada
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16
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Top SM, Preston CM, Dukes JS, Tharayil N. Climate Influences the Content and Chemical Composition of Foliar Tannins in Green and Senesced Tissues of Quercus rubra. FRONTIERS IN PLANT SCIENCE 2017; 8:423. [PMID: 28559896 PMCID: PMC5432568 DOI: 10.3389/fpls.2017.00423] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 03/13/2017] [Indexed: 05/17/2023]
Abstract
Environmental stresses not only influence production of plant metabolites but could also modify their resorption during leaf senescence. The production-resorption dynamics of polyphenolic tannins, a class of defense compound whose ecological role extends beyond tissue senescence, could amplify the influence of climate on ecosystem processes. We studied the quantity, chemical composition, and tissue-association of tannins in green and freshly-senesced leaves of Quercus rubra exposed to different temperature (Warming and No Warming) and precipitation treatments (Dry, Ambient, Wet) at the Boston-Area Climate Experiment (BACE) in Massachusetts, USA. Climate influenced not only the quantity of tannins, but also their molecular composition and cell-wall associations. Irrespective of climatic treatments, tannin composition in Q. rubra was dominated by condensed tannins (CTs, proanthocyanidins). When exposed to Dry and Ambient*Warm conditions, Q. rubra produced higher quantities of tannins that were less polymerized. In contrast, under favorable conditions (Wet), tannins were produced in lower quantities, but the CTs were more polymerized. Further, even as the overall tissue tannin content declined, the content of hydrolysable tannins (HTs) increased under Wet treatments. The molecular composition of tannins influenced their content in senesced litter. Compared to the green leaves, the content of HTs decreased in senesced leaves across treatments, whereas the CT content was similar between green and senesced leaves in Wet treatments that produced more polymerized tannins. The content of total tannins in senesced leaves was higher in Warming treatments under both dry and ambient precipitation treatments. Our results suggest that, though climate directly influenced the production of tannins in green tissues (and similar patterns were observed in the senesced tissue), the influence of climate on tannin content of senesced tissue was partly mediated by the effect on the chemical composition of tannins. These different climatic impacts on leaves over the course of a growing season may alter forest dynamics, not only in decomposition and nutrient cycling dynamics, but also in herbivory dynamics.
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Affiliation(s)
- Sara M. Top
- Plant and Environmental Sciences, Clemson UniversityClemson, SC, USA
- *Correspondence: Sara M. Top
| | | | - Jeffrey S. Dukes
- Department of Forestry and Natural Resources, Purdue UniversityWest Lafayette, IN, USA
- Department of Biological Sciences, Purdue UniversityWest Lafayette, IN, USA
- Department of Biology, University of Massachusetts BostonBoston, MA, USA
| | - Nishanth Tharayil
- Plant and Environmental Sciences, Clemson UniversityClemson, SC, USA
- Nishanth Tharayil
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17
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Malisch CS, Salminen JP, Kölliker R, Engström MT, Suter D, Studer B, Lüscher A. Drought Effects on Proanthocyanidins in Sainfoin (Onobrychis viciifolia Scop.) Are Dependent on the Plant's Ontogenetic Stage. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:9307-9316. [PMID: 27960281 DOI: 10.1021/acs.jafc.6b02342] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Sainfoin (Onobrychis viciifolia Scop.) is a forage legume, which improves animal health and the environmental impact of livestock farming due to its proanthocyanidin content. To identify the impact of drought on acetone/water-extractable proanthocyanidin (PA) concentration and composition in the generative and vegetative stages, a rain exclosure experiment was established. Leaves of 120 plants from 5 different sainfoin accessions were sampled repeatedly and analyzed by UPLC-ESI-MS/MS. The results showed distinct differences in response to drought between vegetative and generative plants. Whereas vegetative plants showed a strong response to drought in growth (-56%) and leaf PA concentration (+46%), generative plants showed no response in growth (-2%) or PA concentration (-9%). The PA composition was stable across environments. The five accessions varied in PA concentrations and composition but showed the same pattern of response to the experimental treatments. These results show that the ontogenetic stage at which drought occurs significantly affects the plant's response.
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Affiliation(s)
- Carsten S Malisch
- Molecular Plant Breeding, Institute of Agricultural Sciences, ETH Zurich , 8092 Zurich, Switzerland
| | - Juha-Pekka Salminen
- Laboratory of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku , 20500 Turku, Finland
| | | | - Marica T Engström
- Laboratory of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku , 20500 Turku, Finland
| | | | - Bruno Studer
- Molecular Plant Breeding, Institute of Agricultural Sciences, ETH Zurich , 8092 Zurich, Switzerland
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Popović BM, Štajner D, Ždero-Pavlović R, Tumbas-Šaponjac V, Čanadanović-Brunet J, Orlović S. Water stress induces changes in polyphenol profile and antioxidant capacity in poplar plants (Populus spp.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 105:242-250. [PMID: 27116372 DOI: 10.1016/j.plaphy.2016.04.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 04/18/2016] [Accepted: 04/19/2016] [Indexed: 05/06/2023]
Abstract
This paper is aimed to characterize young poplar plants under the influence of water stress provoked by polyethileneglycol 6000 (PEG 6000). Three polar genotypes (M1, B229, and PE19/66) were grown in hydroponics and subjected to 100 and 200 mOsm PEG 6000 during six days. Polyphenol characterization, two enzymatic markers and antioxidant capacity in leaves and roots were investigated in stressed plants. Total phenol content, ferric reducing antioxidant capacity (FRAP) and DPPH antiradical power (DPPH ARP) were determined for estimating total antioxidant capacity. Polyphenol oxidase (PPO) and phenylalanine ammonia lyase (PAL) were determined as enzymatic markers. Polyphenol characterization of poplar samples was performed by HPLC-PDA analysis. All results were subjected to correlation analysis and principal component analysis (PCA). Inspite of the decrease of total phenol content in investigated genotypes, as well as total antioxidant capacity, some of polyphenols were affected by stress like flavonoids chrysin, myricetine, kaempferol and isoferulic acid in roots of B229 genotype (Populus deltoides). Genotype B229 also showed the increase of antioxidant capacity and PAL activity in root and leaves under stress what could be the indicator of the adaptability of poplar plants to water stress. Significant positive correlations were obtained between PAL, antioxidant capacity as well as phenolic acids among themselves. Chemometric evaluation showed close interdependence between flavonoids, FRAP, DPPH antiradical power and both investigated enzymes of polyphenol metabolism, PAL and PPO.
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Affiliation(s)
- B M Popović
- Department of Field and Vegetable Crops, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
| | - D Štajner
- Department of Field and Vegetable Crops, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia
| | - R Ždero-Pavlović
- Department of Field and Vegetable Crops, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia
| | - V Tumbas-Šaponjac
- Faculty of Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
| | - J Čanadanović-Brunet
- Faculty of Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia
| | - S Orlović
- Institute of Lowland Forestry and Environment, Antona Čehova 13, 21000 Novi Sad, Serbia
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Malisch C, Lüscher A, Baert N, Engström MT, Studer B, Fryganas C, Suter D, Mueller-Harvey I, Salminen JP. Large Variability of Proanthocyanidin Content and Composition in Sainfoin (Onobrychis viciifolia). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:10234-42. [PMID: 26551032 PMCID: PMC4679186 DOI: 10.1021/acs.jafc.5b04946] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Proanthocyanidins (PAs) in sainfoin (Onobrychis viciifolia Scop.) are of interest to ameliorate the sustainability of livestock production. However, sainfoin forage yield and PA concentrations, as well as their composition, require optimization. Individual plants of 27 sainfoin accessions from four continents were analyzed with LC-ESI-QqQ-MS/MS for PA concentrations and simple phenolic compounds. Large variability existed in PA concentrations (23.0-47.5 mg g(-1) leaf dry matter (DM)), share of prodelphinidins (79-96%), and mean degree of polymerization (11-14) among, but also within, accessions. PAs were mainly located in leaves (26.8 mg g(-1) DM), whereas stems had less PAs (7.8 mg g(-1) DM). Overall, high-yielding plants had lower PA leaf concentrations (R(2) = 0.16, P < 0.001) and fewer leaves (R(2) = 0.66, P < 0.001). However, the results show that these two trade-offs between yield and bioactive PAs can be overcome.
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Affiliation(s)
- Carsten
S. Malisch
- Forage Production
and Grassland Systems, Institute for Sustainability Sciences ISS,
Agroscope, Reckenholzstrasse 191, CH-8046 Zurich, Switzerland
- Forage Crop
Genetics, Institute of Agricultural Sciences, ETH Zurich, CH-8092 Zurich, Switzerland
| | - Andreas Lüscher
- Forage Production
and Grassland Systems, Institute for Sustainability Sciences ISS,
Agroscope, Reckenholzstrasse 191, CH-8046 Zurich, Switzerland
- (A.L.) Phone: +41 58 468
7273. E-mail:
| | - Nicolas Baert
- Laboratory
of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku, FI-20500 Turku, Finland
| | - Marica T. Engström
- Laboratory
of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku, FI-20500 Turku, Finland
| | - Bruno Studer
- Forage Crop
Genetics, Institute of Agricultural Sciences, ETH Zurich, CH-8092 Zurich, Switzerland
| | - Christos Fryganas
- Chemistry
and Biochemistry Laboratory, School of Agriculture, Policy and Development, University of Reading, Reading RG6 6AT, United Kingdom
| | - Daniel Suter
- Forage Production
and Grassland Systems, Institute for Sustainability Sciences ISS,
Agroscope, Reckenholzstrasse 191, CH-8046 Zurich, Switzerland
| | - Irene Mueller-Harvey
- Chemistry
and Biochemistry Laboratory, School of Agriculture, Policy and Development, University of Reading, Reading RG6 6AT, United Kingdom
| | - Juha-Pekka Salminen
- Laboratory
of Organic Chemistry and Chemical Biology, Department of Chemistry, University of Turku, FI-20500 Turku, Finland
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20
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Lüscher A, Mueller-Harvey I, Soussana JF, Rees RM, Peyraud JL. Potential of legume-based grassland-livestock systems in Europe: a review. GRASS AND FORAGE SCIENCE : THE JOURNAL OF THE BRITISH GRASSLAND SOCIETY 2014; 69:206-228. [PMID: 26300574 PMCID: PMC4540161 DOI: 10.1111/gfs.12124] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 03/15/2014] [Indexed: 05/06/2023]
Abstract
European grassland-based livestock production systems face the challenge of producing more meat and milk to meet increasing world demands and to achieve this using fewer resources. Legumes offer great potential for achieving these objectives. They have numerous features that can act together at different stages in the soil-plant-animal-atmosphere system, and these are most effective in mixed swards with a legume proportion of 30-50%. The resulting benefits include reduced dependence on fossil energy and industrial N-fertilizer, lower quantities of harmful emissions to the environment (greenhouse gases and nitrate), lower production costs, higher productivity and increased protein self-sufficiency. Some legume species offer opportunities for improving animal health with less medication, due to the presence of bioactive secondary metabolites. In addition, legumes may offer an adaptation option to rising atmospheric CO2 concentrations and climate change. Legumes generate these benefits at the level of the managed land-area unit and also at the level of the final product unit. However, legumes suffer from some limitations, and suggestions are made for future research to exploit more fully the opportunities that legumes can offer. In conclusion, the development of legume-based grassland-livestock systems undoubtedly constitutes one of the pillars for more sustainable and competitive ruminant production systems, and it can be expected that forage legumes will become more important in the future.
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Affiliation(s)
- A Lüscher
- Agroscope, Institute for Sustainability Sciences Zurich, Switzerland
| | - I Mueller-Harvey
- School of Agriculture, Policy and Development, University of Reading Reading, UK
| | - J F Soussana
- INRA, Grassland Ecosystem Research Clermont-Ferrand, France
| | - R M Rees
- Scotland's Rural College Edinburgh, UK
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21
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Robbins KS, Ma Y, Wells ML, Greenspan P, Pegg RB. Separation and characterization of phenolic compounds from U.S. pecans by liquid chromatography-tandem mass spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:4332-4341. [PMID: 24738776 DOI: 10.1021/jf500909h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The phenolic acids and proanthocyanidins (PACs) of pecans possess bioactive properties, which might be useful in retarding the onset of and ameliorating the status of certain chronic disease states. There is a general lack of information in the literature regarding such compounds, especially the PACs. Crude phenolic extracts pooled from eight commercially significant cultivars were selected based on their relatively high antioxidant capacities. The pooled extracts were separated via Sephadex LH-20 column chromatography into five ethanolic low-molecular-weight (LMW) fractions and one acetonic high-molecular-weight (HMW) fraction. The preparations were then characterized using RP-HPLC-ESI-MS/MS and diol-phase HPLC-ESI-MS/MS in order to determine the key constituents present in the LMW and HMW fractions, respectively. As previously observed in pecan nutmeat, ellagic acid and (+)-catechin were found to be the major phenolics in the LMW fractions. The last eluting LMW fraction did not contain phenolic acids; rather it possessed PAC monomers and dimers. The HMW fraction comprised a majority of its PACs as dimers; yet, monomers, trimers, tetramers, pentamers, and hexamers were also separated and characterized.
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Affiliation(s)
- Katherine S Robbins
- Department of Food Science & Technology, College of Agricultural and Environmental Sciences, The University of Georgia , 100 Cedar Street, Athens, Georgia 30602-2610, United States
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22
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Moctezuma C, Hammerbacher A, Heil M, Gershenzon J, Méndez-Alonzo R, Oyama K. Specific polyphenols and tannins are associated with defense against insect herbivores in the tropical oak Quercus oleoides. J Chem Ecol 2014; 40:458-67. [PMID: 24809533 DOI: 10.1007/s10886-014-0431-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/08/2014] [Accepted: 04/09/2014] [Indexed: 12/25/2022]
Abstract
The role of plant polyphenols as defenses against insect herbivores is controversial. We combined correlative field studies across three geographic regions (Northern Mexico, Southern Mexico, and Costa Rica) with induction experiments under controlled conditions to search for candidate compounds that might play a defensive role in the foliage of the tropical oak, Quercus oleoides. We quantified leaf damage caused by four herbivore guilds (chewers, skeletonizers, leaf miners, and gall forming insects) and analyzed the content of 18 polyphenols (including hydrolyzable tannins, flavan-3-ols, and flavonol glycosides) in the same set of leaves using high performance liquid chromatography and mass spectrometry. Foliar damage ranged from two to eight percent per region, and nearly 90% of all the damage was caused by chewing herbivores. Damage due to chewing herbivores was positively correlated with acutissimin B, catechin, and catechin dimer, and damage by mining herbivores was positively correlated with mongolinin A. By contrast, gall presence was negatively correlated with vescalagin and acutissimin B. By using redundancy analysis, we searched for the combinations of polyphenols that were associated to natural herbivory: the combination of mongolinin A and acutissimin B had the highest association to herbivory. In a common garden experiment with oak saplings, artificial damage increased the content of acutissimin B, mongolinin A, and vescalagin, whereas the content of catechin decreased. Specific polyphenols, either individually or in combination, rather than total polyphenols, were associated with standing leaf damage in this tropical oak. Future studies aimed at understanding the ecological role of polyphenols can use similar correlative studies to identify candidate compounds that could be used individually and in biologically meaningful combinations in tests with herbivores and pathogens.
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Affiliation(s)
- Coral Moctezuma
- Centro de Investigaciones en Ecosistemas, Universidad Nacional Autónoma de México (UNAM), Antigua Carretera a Pátzcuaro No. 8701 Col. Ex-Hacienda de San José de La Huerta, Morelia, Michoacán, 58190, Mexico,
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23
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Madritch MD, Kingdon CC, Singh A, Mock KE, Lindroth RL, Townsend PA. Imaging spectroscopy links aspen genotype with below-ground processes at landscape scales. Philos Trans R Soc Lond B Biol Sci 2014; 369:20130194. [PMID: 24733949 PMCID: PMC3983929 DOI: 10.1098/rstb.2013.0194] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Fine-scale biodiversity is increasingly recognized as important to ecosystem-level processes. Remote sensing technologies have great potential to estimate both biodiversity and ecosystem function over large spatial scales. Here, we demonstrate the capacity of imaging spectroscopy to discriminate among genotypes of Populus tremuloides (trembling aspen), one of the most genetically diverse and widespread forest species in North America. We combine imaging spectroscopy (AVIRIS) data with genetic, phytochemical, microbial and biogeochemical data to determine how intraspecific plant genetic variation influences below-ground processes at landscape scales. We demonstrate that both canopy chemistry and below-ground processes vary over large spatial scales (continental) according to aspen genotype. Imaging spectrometer data distinguish aspen genotypes through variation in canopy spectral signature. In addition, foliar spectral variation correlates well with variation in canopy chemistry, especially condensed tannins. Variation in aspen canopy chemistry, in turn, is correlated with variation in below-ground processes. Variation in spectra also correlates well with variation in soil traits. These findings indicate that forest tree species can create spatial mosaics of ecosystem functioning across large spatial scales and that these patterns can be quantified via remote sensing techniques. Moreover, they demonstrate the utility of using optical properties as proxies for fine-scale measurements of biodiversity over large spatial scales.
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Affiliation(s)
| | - Clayton C. Kingdon
- Department of Forest and Wildlife Ecology, University of Wisconsin, Madison, WI 53706, USA
| | - Aditya Singh
- Department of Forest and Wildlife Ecology, University of Wisconsin, Madison, WI 53706, USA
| | - Karen E. Mock
- Department of Wildland Resources, Utah State University, Logan, UT 84322, USA
| | | | - Philip A. Townsend
- Department of Forest and Wildlife Ecology, University of Wisconsin, Madison, WI 53706, USA
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24
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Moore BD, Andrew RL, Külheim C, Foley WJ. Explaining intraspecific diversity in plant secondary metabolites in an ecological context. THE NEW PHYTOLOGIST 2014; 201:733-750. [PMID: 24117919 DOI: 10.1111/nph.12526] [Citation(s) in RCA: 251] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 08/22/2013] [Indexed: 05/10/2023]
Abstract
Plant secondary metabolites (PSMs) are ubiquitous in plants and play many ecological roles. Each compound can vary in presence and/or quantity, and the composition of the mixture of chemicals can vary, such that chemodiversity can be partitioned within and among individuals. Plant ontogeny and environmental and genetic variation are recognized as sources of chemical variation, but recent advances in understanding the molecular basis of variation may allow the future deployment of isogenic mutants to test the specific adaptive function of variation in PSMs. An important consequence of high intraspecific variation is the capacity to evolve rapidly. It is becoming increasingly clear that trait variance linked to both macro- and micro-environmental variation can also evolve and may respond more strongly to selection than mean trait values. This research, which is in its infancy in plants, highlights what could be a missing piece of the picture of PSM evolution. PSM polymorphisms are probably maintained by multiple selective forces acting across many spatial and temporal scales, but convincing examples that recognize the diversity of plant population structures are rare. We describe how diversity can be inherently beneficial for plants and suggest fruitful avenues for future research to untangle the causes and consequences of intraspecific variation.
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Affiliation(s)
- Ben D Moore
- Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, 2751, NSW, Australia
| | - Rose L Andrew
- Department of Botany, University of British Columbia, 3529-6270 University Blvd, Vancouver, BC, V6T 1Z4, Canada
| | - Carsten Külheim
- Research School of Biology, Australian National University, Canberra, 0200, ACT, Australia
| | - William J Foley
- Research School of Biology, Australian National University, Canberra, 0200, ACT, Australia
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25
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Schmidt MA, Kreinberg AJ, Gonzalez JM, Halvorson JJ, French E, Bollmann A, Hagerman AE. Soil microbial communities respond differently to three chemically defined polyphenols. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 72:190-197. [PMID: 23545181 DOI: 10.1016/j.plaphy.2013.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 03/07/2013] [Indexed: 06/02/2023]
Abstract
High molecular weight polyphenols (e.g. tannins) that enter the soil may affect microbial populations, by serving as substrates for microbial respiration or by selecting for certain microbes. In this study we examined how three phenolic compounds that represent some environmentally widespread tannins or their constituent functional groups were respired by soil microorganisms and how the compounds affected the abundance and diversity of soil bacteria and archaea, including ammonia oxidizers. An acidic, silt loam soil from a pine forest was incubated for two weeks with the monomeric phenol methyl gallate, the small polyphenol epigallocatechin gallate, or the large polyphenol oenothein B. Respiration of the polyphenols during the incubation was measured using the Microresp™ system. After incubation, metabolic diversity was determined by community level physiological profiling (CLPP), and genetic diversity was determined using denaturing gradient gel electrophoresis (DGGE) analysis on DNA extracted from the soil samples. Total microbial populations and ammonia-oxidizing populations were measured using real time quantitative polymerase chain reaction (qPCR). Methyl gallate was respired more efficiently than the higher molecular weight tannins but not as efficiently as glucose. Methyl gallate and epigallocatechin gallate selected for genetically or physiologically unique populations compared to glucose. None of the polyphenols supported microbial growth, and none of the polyphenols affected ammonia-oxidizing bacterial populations or ammonia-oxidizing archaea. Additional studies using both a wider range of polyphenols and a wider range of soils and environments are needed to elucidate the role of polyphenols in determining soil microbiological diversity.
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Affiliation(s)
- Michael A Schmidt
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA
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26
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Boeckler GA, Gershenzon J, Unsicker SB. Gypsy Moth Caterpillar Feeding has Only a Marginal Impact on Phenolic Compounds in Old-Growth Black Poplar. J Chem Ecol 2013; 39:1301-12. [DOI: 10.1007/s10886-013-0350-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 09/18/2013] [Accepted: 09/19/2013] [Indexed: 10/26/2022]
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27
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Azuhnwi BN, Boller B, Dohme-Meier F, Hess HD, Kreuzer M, Stringano E, Mueller-Harvey I. Exploring variation in proanthocyanidin composition and content of sainfoin (Onobrychis viciifolia). JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:2102-2109. [PMID: 23450773 DOI: 10.1002/jsfa.6119] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 02/04/2013] [Accepted: 02/28/2013] [Indexed: 06/01/2023]
Abstract
BACKGROUND To maximise the potential benefits to ruminants from sainfoin, plant breeding should focus on developing varieties with predictable condensed tannin (CT) profiles. Little is known about whether and to what extent accession and environment influence sainfoin CT structures. We sought to investigate the likely extent of accession and environment effects on CT characteristics of sainfoin. Four single-flowering (Communis) accessions and two multiple-flowering (Bifera) accessions, grown at three sites and collected at two harvest times were used. Sainfoin CTs were characterised by thiolytic degradation and by high-performance liquid chromatography-gel permeation chromatography (HPLC-GPC). Also, CT concentration measured earlier by the HCl-butanol method was compared with that from thiolysis. RESULTS Thiolysis revealed that accession and harvest influenced most CT structural attributes. Bifera CTs eluted as single peaks (Mp < 6220 Da) in HPLC-GPC across the two harvests and two sites, whereas Communis generated two to three CT peaks, which included a peak (Mp ≤ 9066 Da) in the second harvest. A discrepancy was observed in CT concentrations measured by the two methods. CONCLUSION CTs from Bifera accessions had more stable and predictable characteristics across harvests and sites and this could be of interest when breeding sainfoin.
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Affiliation(s)
- Blasius N Azuhnwi
- Agroscope Liebefeld-Posieux Research Station ALP, 1725 Posieux, Switzerland
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28
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Schmidt MA, Gonzalez JM, Halvorson JJ, Hagerman AE. Metal mobilization in soil by two structurally defined polyphenols. CHEMOSPHERE 2013; 90:1870-1877. [PMID: 23149187 DOI: 10.1016/j.chemosphere.2012.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 09/26/2012] [Accepted: 10/15/2012] [Indexed: 06/01/2023]
Abstract
Polyphenols including tannins comprise a large percentage of plant detritus such as leaf litter, and affect soil processes including metal dynamics. We tested the effects of tannins on soil metal mobilization by determining the binding stoichiometries of two model polyphenols to Al(III) and Fe(III) using micelle-mediated separation and inductively coupled plasma optical emission spectroscopy (ICP-OES). By fitting the data to the Langmuir model we found the higher molecular weight polyphenol (oenothein B) was able to bind more metal than the smaller polyphenol (epigallocatechin gallate, EGCg). For example, oenothein B bound 9.43 mol Fe mol(-1), while EGCg bound 4.41 mol of Fe mol(-1). Using the parameters from the binding model, we applied the Langmuir model for competitive binding to predict binding for mixtures of Al(III) and Fe(III). Using the parameters from the single metal experiments and information about polyphenol sorption to soils we built a model to predict metal mobilization from soils amended with polyphenols. We tested the model with three natural soils and found that it predicted mobilization of Fe and Al with r(2)=0.92 and r(2)=0.88, respectively. The amount of metal that was mobilized was directly proportional to the maximum amount of metal bound to the polyphenol. The secondary parameter in each model was the amount of weak organically chelated Fe or Al that was in the soil. This study provides the first compound-specific information about how natural polyphenols interact with metals in the environment. We propose a model that is applicable to developing phytochelation agents for metal detoxification, and we discuss how tannins may play a role in metal mobilization from soils.
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Affiliation(s)
- Michael A Schmidt
- Department of Chemistry & Biochemistry, Miami University, Oxford, OH 45056, USA
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29
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Rubert-Nason KF, Holeski LM, Couture JJ, Gusse A, Undersander DJ, Lindroth RL. Rapid phytochemical analysis of birch (Betula) and poplar (Populus) foliage by near-infrared reflectance spectroscopy. Anal Bioanal Chem 2012. [PMID: 23180073 DOI: 10.1007/s00216-012-6513-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Poplar (Populus) and birch (Betula) species are widely distributed throughout the northern hemisphere, where they are foundation species in forest ecosystems and serve as important sources of pulpwood. The ecology of these species is strongly linked to their foliar chemistry, creating demand for a rapid, inexpensive method to analyze phytochemistry. Our study demonstrates the feasibility of using near-infrared reflectance spectroscopy (NIRS) as an inexpensive, high-throughput tool for determining primary (e.g., nitrogen, sugars, starch) and secondary (e.g., tannins, phenolic glycosides) foliar chemistry of Populus and Betula species, and identifies conditions necessary for obtaining reliable quantitative data. We developed calibrations with high predictive power (residual predictive deviations ≤ 7.4) by relating phytochemical concentrations determined with classical analytical methods (e.g., spectrophotometric assays, liquid chromatography) to NIR spectra, using modified partial least squares regression. We determine that NIRS, although less sensitive and precise than classical methods for some compounds, provides useful predictions in a much faster, less expensive manner than do classical methods.
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30
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Stringano E, Hayot Carbonero C, Smith LMJ, Brown RH, Mueller-Harvey I. Proanthocyanidin diversity in the EU 'HealthyHay' sainfoin (Onobrychis viciifolia) germplasm collection. PHYTOCHEMISTRY 2012; 77:197-208. [PMID: 22313998 DOI: 10.1016/j.phytochem.2012.01.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 01/03/2012] [Accepted: 01/11/2012] [Indexed: 05/25/2023]
Abstract
This study investigated 37 diverse sainfoin (Onobrychis viciifolia Scop.) accessions from the EU 'HealthyHay' germplasm collection for proanthocyanidin (PA) content and composition. Accessions displayed a wide range of differences: PA contents varied from 0.57 to 2.80 g/100 g sainfoin; the mean degree of polymerisation from 12 to 84; the proportion of prodelphinidin tannins from 53% to 95%, and the proportion of trans-flavanol units from 12% to 34%. A positive correlation was found between PA contents (thiolytic versus acid-butanol degradation; P<0.001; R(2)=0.49). A negative correlation existed between PA content (thiolysis) and mDP (P<0.05; R(2)=-0.30), which suggested that accessions with high PA contents had smaller PA polymers. Cluster analysis revealed that European accessions clustered into two main groups: Western Europe and Eastern Europe/Asia. In addition, accessions from USA, Canada and Armenia tended to cluster together. Overall, there was broad agreement between tannin clusters and clusters that were based on morphological and agronomic characteristics.
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Affiliation(s)
- Elisabetta Stringano
- Chemistry and Biochemistry Laboratory, Food Production and Quality Division, School of Agriculture, Policy and Development, University of Reading, 1 Earley Gate, Reading RG6 6AT, UK.
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31
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Barbehenn RV, Peter Constabel C. Tannins in plant-herbivore interactions. PHYTOCHEMISTRY 2011; 72:1551-65. [PMID: 21354580 DOI: 10.1016/j.phytochem.2011.01.040] [Citation(s) in RCA: 373] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 01/26/2011] [Accepted: 01/31/2011] [Indexed: 05/07/2023]
Abstract
Tannins are the most abundant secondary metabolites made by plants, commonly ranging from 5% to 10% dry weight of tree leaves. Tannins can defend leaves against insect herbivores by deterrence and/or toxicity. Contrary to early theories, tannins have no effect on protein digestion in insect herbivores. By contrast, in vertebrate herbivores tannins can decrease protein digestion. Tannins are especially prone to oxidize in insects with high pH guts, forming semiquinone radicals and quinones, as well as other reactive oxygen species. Tannin toxicity in insects is thought to result from the production of high levels of reactive oxygen species. Tannin structure has an important effect on biochemical activity. Ellagitannins oxidize much more readily than do gallotannins, which are more oxidatively active than most condensed tannins. The ability of insects to tolerate ingested tannins comes from a variety of biochemical and physical defenses in their guts, including surfactants, high pH, antioxidants, and a protective peritrophic envelope that lines the midgut. Most work on the ecological roles of tannins has been correlative, e.g., searching for negative associations between tannins and insect performance. A greater emphasis on manipulative experiments that control tannin levels is required to make further progress on the defensive functions of tannins. Recent advances in the use of molecular methods has permitted the production of tannin-overproducing transgenic plants and a better understanding of tannin biosynthetic pathways. Many research areas remain in need of further work, including the effects of different tannin types on different types of insects (e.g., caterpillars, grasshoppers, sap-sucking insects).
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Affiliation(s)
- Raymond V Barbehenn
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA
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