151
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Isah T. Stress and defense responses in plant secondary metabolites production. Biol Res 2019; 52:39. [PMID: 31358053 PMCID: PMC6661828 DOI: 10.1186/s40659-019-0246-3] [Citation(s) in RCA: 413] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 07/23/2019] [Indexed: 01/25/2023] Open
Abstract
In the growth condition(s) of plants, numerous secondary metabolites (SMs) are produced by them to serve variety of cellular functions essential for physiological processes, and recent increasing evidences have implicated stress and defense response signaling in their production. The type and concentration(s) of secondary molecule(s) produced by a plant are determined by the species, genotype, physiology, developmental stage and environmental factors during growth. This suggests the physiological adaptive responses employed by various plant taxonomic groups in coping with the stress and defensive stimuli. The past recent decades had witnessed renewed interest to study abiotic factors that influence secondary metabolism during in vitro and in vivo growth of plants. Application of molecular biology tools and techniques are facilitating understanding the signaling processes and pathways involved in the SMs production at subcellular, cellular, organ and whole plant systems during in vivo and in vitro growth, with application in metabolic engineering of biosynthetic pathways intermediates.
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Affiliation(s)
- Tasiu Isah
- Department of Botany, School of Chemical and Life Sciences, Hamdard University, New Delhi, 110 062, India.
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152
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Small-Scale Bioreactor for Sterile Hydroponics and Hairy Roots: Metabolic Diversity and Salicylic Acid Exudation by Hairy Roots of Hyoscyamus niger. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9153044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The volume and complexity of commercial bioreactors for sterile hydroponics and hairy roots are too large for comparative analysis of many cultures. Here a small-scale bioreactor fabricated from standard glass materials and suitable for both airlift and bubble aeration mode is described. The performance of the bioreactor was tested by growing oilseed rape (Brassica napus L.) and rose plants (Rosa canina L.) in sterile hydroponics and by cultivating hairy roots of henbane (Hyoscyamus niger L.) and sesame (Hyoscyamus niger L.). Plants grown in hydroponics for up to six weeks did not show chloroses or necroses. Hairy roots grew faster or comparably fast in bioreactors as compared to shaking flasks. Root exudates of roses and exudates of hairy roots of henbane were subjected to targeted and nontargeted analysis by HPLC coupled with optical and mass spectrometric detectors. The diversity and concentration of hairy root exudates were higher in bioreactors than in shaking flasks. The composition of hairy root exudates of three accessions of H. niger did not match the genetic relatedness among the accessions. Hairy roots of Hyoscyamus niger exuded salicylic acid in amounts varying among plant accessions and between bioreactors and shaking flask cultures.
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153
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Labarrere B, Prinzing A, Dorey T, Chesneau E, Hennion F. Variations of Secondary Metabolites among Natural Populations of Sub-Antarctic Ranunculus Species Suggest Functional Redundancy and Versatility. PLANTS (BASEL, SWITZERLAND) 2019; 8:E234. [PMID: 31331007 PMCID: PMC6681328 DOI: 10.3390/plants8070234] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 06/28/2019] [Accepted: 07/16/2019] [Indexed: 11/25/2022]
Abstract
Plants produce a high diversity of metabolites which help them sustain environmental stresses and are involved in local adaptation. However, shaped by both the genome and the environment, the patterns of variation of the metabolome in nature are difficult to decipher. Few studies have explored the relative parts of geographical region versus environment or phenotype in metabolomic variability within species and none have discussed a possible effect of the region on the correlations between metabolites and environments or phenotypes. In three sub-Antarctic Ranunculus species, we examined the role of region in metabolite differences and in the relationship between individual compounds and environmental conditions or phenotypic traits. Populations of three Ranunculus species were sampled across similar environmental gradients in two distinct geographical regions in îles Kerguelen. Two metabolite classes were studied, amines (quantified by high-performance liquid chromatography and fluorescence spectrophotometry) and flavonols (quantified by ultra-high-performance liquid chromatography with triple quadrupole mass spectrometry). Depending on regions, the same environment or the same trait may be related to different metabolites, suggesting metabolite redundancy within species. In several cases, a given metabolite showed different or even opposite relations with the same environmental condition or the same trait across the two regions, suggesting metabolite versatility within species. Our results suggest that metabolites may be functionally redundant and versatile within species, both in their response to environments and in their relation with the phenotype. These findings open new perspectives for understanding evolutionary responses of plants to environmental changes.
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Affiliation(s)
- Bastien Labarrere
- UMR 6553 ECOBIO, Université de Rennes 1, OSUR, CNRS, Av du Général Leclerc, F-35042 Rennes, France
| | - Andreas Prinzing
- UMR 6553 ECOBIO, Université de Rennes 1, OSUR, CNRS, Av du Général Leclerc, F-35042 Rennes, France
| | - Thomas Dorey
- Institut für Systematische und Evolutionäre Botanik, Zollikerstrasse 107, 8008 Zürich, Switzerland
| | - Emeline Chesneau
- UMR 6553 ECOBIO, Université de Rennes 1, OSUR, CNRS, Av du Général Leclerc, F-35042 Rennes, France
| | - Françoise Hennion
- UMR 6553 ECOBIO, Université de Rennes 1, OSUR, CNRS, Av du Général Leclerc, F-35042 Rennes, France.
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154
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Kergunteuil A, Humair L, Münzbergová Z, Rasmann S. Plant adaptation to different climates shapes the strengths of chemically mediated tritrophic interactions. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13396] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Alan Kergunteuil
- Functional Ecology Laboratory, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
| | - Lauréline Humair
- Functional Ecology Laboratory, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
| | - Zuzana Münzbergová
- Department of Botany, Faculty of Science Charles University Prague Czech Republic
- Institute of Botany Czech Academy of Sciences Průhonice Czech Republic
| | - Sergio Rasmann
- Functional Ecology Laboratory, Institute of Biology University of Neuchâtel Neuchâtel Switzerland
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155
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Guedes LM, Aguilera N, Ferreira BG, Riquelme S, Sáez-Carrillo K, Becerra J, Pérez C, Bustos E, Isaias RMS. Spatiotemporal variation in phenolic levels in galls of calophyids on Schinus polygama (Anacardiaceae). JOURNAL OF PLANT RESEARCH 2019; 132:509-520. [PMID: 31250145 DOI: 10.1007/s10265-019-01118-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 06/17/2019] [Indexed: 06/09/2023]
Abstract
The expression of plant secondary metabolism is strongly controlled by plant both in time and space. Although the variation of secondary metabolites, such as soluble and structural phenolics (e.g., lignins), has been largely observed in gall-inducing insects, and compared to their non-galled host organs, only a few datasets recording such variation are available. Accordingly, the relative importance of spatiotemporal variability in phenolic contents, and the influence of gall developmental stages on the original composition of host organs are poorly discussed. To address this knowledge gap, we histochemically determined the sites of polyphenol and lignin accumulation, and the polyphenol contents in three developmental stages of two calophyid galls and their correspondent host organs. Current results indicate that the compartmentalization of phenolics and lignins on Schinus polygama (Cav.) Cabrera follows a similar pattern in the two-calophyid galls, accumulating in the outer (the external tissue layers) and in the inner tissue compartments (the cell layers in contact with the gall chamber). The non-accumulation in the median compartment (median parenchyma layers of gall wall with vascular bundles, where gall inducer feeds) is important for the inducer, because its mouth apparatus enter in contact with the cells of this compartment. Also, the concentration of phenolics has opposite dynamics, decreasing in leaf galls and increasing in stem galls, in temporal scale, i.e., from maturation toward senescence. The concentration of phenolics in non-galled host organs, and in both galls indicated the extended phenotype of Calophya rubra (Blanchard) and C. mammifex Burckhardt & Basset (Hemiptera: Sternorrhyncha: Psylloidea: Calophyidae) over the same host plant metabolic potentiality.
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Affiliation(s)
- Lubia M Guedes
- Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Casilla 160-C, CP 4030000, Concepción, Chile
| | - Narciso Aguilera
- Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Casilla 160-C, CP 4030000, Concepción, Chile
| | - Bruno G Ferreira
- Departamento de Botânica, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ), Cidade Universitária, Rio de Janeiro, 21941-902, Brazil
| | - Sebastián Riquelme
- Unidad de Desarrollo Tecnológico (UDT), Universidad de Concepción, Ave. Cordillera 2634, CP 4191996, Coronel, Chile
| | - Katia Sáez-Carrillo
- Departamento de Estadística, Facultad de Ciencias Físicas y Matemáticas, Universidad de Concepción, Casilla 160-C, CP 4030000, Concepción, Chile
| | - José Becerra
- Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, CP 4030000, Concepción, Chile
| | - Claudia Pérez
- Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, CP 4030000, Concepción, Chile
| | - Evelyn Bustos
- Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, CP 4030000, Concepción, Chile
| | - Rosy M S Isaias
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, Belo Horizonte, Minas Gerais, 31270-090, Brazil.
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156
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Allevato DM, Groppo M, Kiyota E, Mazzafera P, Nixon KC. Evolution of phytochemical diversity in Pilocarpus (Rutaceae). PHYTOCHEMISTRY 2019; 163:132-146. [PMID: 31078082 DOI: 10.1016/j.phytochem.2019.03.027] [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: 10/23/2018] [Revised: 03/29/2019] [Accepted: 03/30/2019] [Indexed: 06/09/2023]
Abstract
The evolution of phytochemical diversity and biosynthetic pathways in plants can be evaluated from a phylogenetic and environmental perspective. Pilocarpus Vahl (Rutaceae), an economically important medicinal plant in the family Rutaceae, has a great diversity of imidazole alkaloids and coumarins. In this study, we used phylogenetic comparative methods to determine whether there is a phylogenetic signal for chemical traits across the genus Pilocarpus; this included ancestral reconstructions of continuous and discrete chemical traits. Bioclimatic variables found to be associated with the distribution of this genus were used to perform OLS regressions between chemical traits and bioclimatic variables. Next, these regression models were evaluated to test whether bioclimatic traits could significantly predict compound concentrations. Our study found that in terms of compound concentration, variation is most significantly associated with adaptive environmental convergence rather than phylogenetic relationships. The best predictive model of chemical traits was the OLS regression that modeled the relationship between coumarin and precipitation in the coldest quarter. However, we also found one chemical trait was dependent on phylogenetic history and bioclimatic factors. These findings emphasize that consideration of both environmental and phylogenetic factors is essential to tease out the intricate processes in the evolution of chemical diversity in plants. These methods can benefit fields such as conservation management, ecology, and evolutionary biology.
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Affiliation(s)
- Daniella M Allevato
- Cornell University, L.H. Bailey Hortorium, Section of Plant Biology, School of Plant Sciences, Cornell University, Ithaca, NY, USA.
| | - Milton Groppo
- USP Ribeirão Preto, Departamento de Biologia, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil.
| | - Eduardo Kiyota
- UNICAMP, Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Brazil.
| | - Paulo Mazzafera
- UNICAMP, Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Brazil; Escola Superior de Agricultura Luiz de Queiroz, Departamento de Produção Vegetal, Universidade de São Paulo, Piracicaba, Brazil.
| | - Kevin C Nixon
- Cornell University, L.H. Bailey Hortorium, Section of Plant Biology, School of Plant Sciences, Cornell University, Ithaca, NY, USA.
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157
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Ode PJ. Plant toxins and parasitoid trophic ecology. CURRENT OPINION IN INSECT SCIENCE 2019; 32:118-123. [PMID: 31113623 DOI: 10.1016/j.cois.2019.01.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 01/09/2019] [Accepted: 01/15/2019] [Indexed: 06/09/2023]
Abstract
Parasitoids (parasitic wasps) are ubiquitous components of nearly all communities containing plant-insect herbivore associations. Plant toxin defenses against herbivores may also affect higher trophic levels by directly (e.g., plant toxins encountered in host hemolymph) or indirectly (e.g., plant toxins reduce host size/quality or alter the host's immunity against parasitoids). Yet, whether parasitoids structure plant-herbivore interactions remains relatively understudied. Nevertheless, recent meta-analyses and empirical work emphasize the importance of parasitoids in structuring interactions among lower trophic levels. Two promising areas of research are particularly ripe for future exploration: a) the potential for microbes to alter the interactions among plants, insect herbivores, and parasitoids, and b) the effects of climate change on phenological (mis)matches among trophic levels.
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Affiliation(s)
- Paul J Ode
- Department of Bioagricultural Sciences and Pest Management and the Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523-1177, United States.
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158
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Marsh KJ, Saraf I, Hocart CH, Youngentob K, Singh IP, Foley WJ. Occurrence and distribution of unsubstituted B-ring flavanones in Eucalyptus foliage. PHYTOCHEMISTRY 2019; 160:31-39. [PMID: 30682682 DOI: 10.1016/j.phytochem.2019.01.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/08/2019] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
A group of plant specialised metabolites (PSMs) collectively known as unsubstituted B-ring flavanones (UBFs) have previously been found in the foliage of some species from the genus Eucalyptus L'Hér. (Myrtaceae), specifically from the subgenus Eucalyptus (monocalypts). Captive feeding studies using artificial diets suggest that these compounds may potentially influence the feeding preferences of marsupial folivores, such as koalas. Understanding natural variation in the composition and concentration of UBFs in eucalypt foliage is a first step to deciding whether, through their effects on herbivory, they might have broader effects on ecosystem dynamics. We used ESI-LCMS/MS and HPLC to characterise and quantify UBFs in 351 individual trees from 25 monocalypt species. We found large variation in the total UBF concentration both between and within species. For example, the mean concentration of UBFs in Eucalyptus muelleriana was 0.2 mg g-1 dry wt, whereas it was 105.7 mg g-1 dry wt, with a range of 78.2-141.3 mg g-1 dry wt, in Eucalyptus mediocris. Different eucalypt species contained different subsets of ten UBFs, and three species showed potential chemotypic variation between individuals within species. Our results suggest that UBFs naturally vary between monocalypt species and individuals at concentrations that could realistically be expected to affect the feeding dynamics of marsupial eucalypt folivores. UBFs could be measured relatively rapidly and cheaply in future studies using near-infrared reflectance (NIR) spectroscopy, as we were able to successfully predict the total UBF concentration of samples from their NIR spectra, with an r2 value of 0.98 and a standard error of prediction (SEP) of 6.07. This work further solidifies NIR spectroscopy as a powerful tool enabling ecologists to analyse the chemical composition of large numbers of samples.
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Affiliation(s)
- Karen J Marsh
- Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia.
| | - Isha Saraf
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, 160062 Punjab, India
| | - Charles H Hocart
- Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia; School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Long Shuo Rd, Wei Yang District, Xi'an, Shaanxi 710021, People's Republic of China
| | - Kara Youngentob
- Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia
| | - Inder-Pal Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, 160062 Punjab, India
| | - William J Foley
- Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia
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159
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Allevato DM, Kiyota E, Mazzafera P, Nixon KC. Ecometabolomic Analysis of Wild Populations of Pilocarpus pennatifolius (Rutaceae) Using Unimodal Analyses. FRONTIERS IN PLANT SCIENCE 2019; 10:258. [PMID: 30894869 PMCID: PMC6414451 DOI: 10.3389/fpls.2019.00258] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Studies examining the diversity of plant specialized metabolites suggest that biotic and abiotic pressures greatly influence the qualitative and quantitative diversity found in a species. Large geographic distributions expose a species to a great variety of environmental pressures, thus providing an enormous opportunity for expression of environmental plasticity. Pilocarpus, a neotropical genus of Rutaceae, is rich in alkaloids, terpenoids, and coumarins, and is the only commercial source of the alkaloid pilocarpine for the treatment of glaucoma. Overharvesting of species in this genus for pilocarpine, has threatened natural populations of the species. The aim of this research was to understand how adaptation to environmental variation shapes the metabolome in multiple populations of the widespread species Pilocarpus pennatifolius. LCMS data from alkaloid and phenolic extracts of leaf tissue were analyzed with environmental predictors using unimodal unconstrained and constrained ordination methods for an untargeted metabolomics analysis. PLS-DA was used to further confirm the chemoecotypes of each site. The most important variables contributing to the alkaloid variation between the sites: mean temperature of wettest quarter, as well as the soil content of phosphorus, magnesium, and base saturation (V%). The most important contributing to the phenolic variation between the sites: mean temperature of the wettest quarter, temperature seasonality, calcium and soil electrical conductivity. This research will have broad implications in a variety of areas including biocontrol for pests, environmental and ecological plant physiology, and strategies for species conservation maximizing phytochemical diversity.
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Affiliation(s)
- Daniella M. Allevato
- Section of Plant Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, United States
| | - Eduardo Kiyota
- Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
| | - Paulo Mazzafera
- Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
- Departamento de Produção Vegetal, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, Brazil
| | - Kevin C. Nixon
- Section of Plant Biology, School of Integrative Plant Science, Cornell University, Ithaca, NY, United States
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160
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Wang L, Cornell SJ, Speed MP. The evolution of variance in sequential defences. J Theor Biol 2019; 462:194-209. [PMID: 30300647 DOI: 10.1016/j.jtbi.2018.10.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 09/06/2018] [Accepted: 10/03/2018] [Indexed: 01/14/2023]
Abstract
The defences used by organisms against predators display a great degree of variability. Defence phenotypes can differ substantially among individuals of the same species, and a single individual can itself deploy a variety of defences. Here, we use a mathematical model that includes mutation and selection to understand the evolutionary origin of this variability in a population of a species that deploys defences sequentially ("first" and "second" defences). Typically, the first defence evolves to have lower variance, i.e. appears more closely accumulated around the ideal phenotype, than the second defence (even when the breaching the first defence incurs more fitness loss than breaching the second defence with the other parameters the same for both defences). However, if the first defence is much less effective in repelling predators, or is much less tolerant of deviation from the ideal phenotype, then the first defence can evolve to have higher variance than the second. Other factors like mutation strength and the losses in the fitness when each defence fails also influence the defence variance. Larger mutation rate incurs larger equilibrium variances, and when the comparative importance in fitness of one defence increases, then the ratio between the variances of this defence and the other defence decreases. Sequentially acting defences are found in many organisms, so we encourage empirical research to test our theoretical predictions.
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Affiliation(s)
- Lingzi Wang
- Department of Evolution, Ecology and Behaviour, Institute of Integrative Biology, Faculty of Health & Life Sciences, University of Liverpool, Liverpool L69 7ZB, UK.
| | - Stephen J Cornell
- Department of Evolution, Ecology and Behaviour, Institute of Integrative Biology, Faculty of Health & Life Sciences, University of Liverpool, Liverpool L69 7ZB, UK
| | - Michael P Speed
- Department of Evolution, Ecology and Behaviour, Institute of Integrative Biology, Faculty of Health & Life Sciences, University of Liverpool, Liverpool L69 7ZB, UK
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161
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Popović Z, Krstić-Milošević D, Stefanović M, Matić R, Vidaković V, Bojović S. Chemical and Morphological Inter- and Intrapopulation Variability in Natural Populations of Gentiana pneumonanthe L. Chem Biodivers 2019; 16:e1800509. [PMID: 30511810 DOI: 10.1002/cbdv.201800509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 12/04/2018] [Indexed: 12/22/2022]
Abstract
Inter- and intrapopulation variability in six natural populations of the rare species Gentiana pneumonanthe was examined based on morphological and chemical data. Population size and linear morphometric parameters differed significantly among populations, but without a clear connection to habitat conditions, i. e. water supply and light availability. Leaf shape varied from ovate to lanceolate in all populations, and one population was distinctive in having the largest number of leaves of transitional shape. HPLC analyses of six secondary metabolites were performed separately for belowground parts, and aboveground vegetative and reproductive parts of individual plants (6 populations ×7 individuals ×3 plant parts, n=126) in order to examine differences at the population and individual levels. Three secoiridoids (swertiamarin (SWM), sweroside (SWZ), and gentiopicrin (GP)), one xanthone (mangiferin (MGF)), and two flavones (isoorientin (IO) and isovitexin (IV)) were detected and quantified in the analyzed samples: sweroside dominated in the aboveground reproductive part, mangiferin in the aboveground vegetative part, and gentiopicrin in the belowground part. At the population level, differences in contents of the analyzed chemicals among populations were significant only for a few metabolites. At the individual level, a pronounced organ-dependent distribution of secondary metabolites was revealed. The results of this study contribute to a better understanding of natural variability within populations of the rare and threatened G. pneumonanthe, and provide data on the contents and within-plant distribution of secondary metabolites, which are important as pharmacologically active compounds and may be useful for further biotechnological procedures regarding this species.
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Affiliation(s)
- Zorica Popović
- Institute for Biological Research, Department of Ecology, University of Belgrade, B, ulevar despota Stefana 142, Belgrade, 11000, Serbia
| | - Dijana Krstić-Milošević
- Institute for Biological Research, Department of Plant Physiology, University of Belgrade, Bulevar despota Stefana 142, Belgrade, 11000, Serbia
| | - Milena Stefanović
- Institute for Biological Research, Department of Ecology, University of Belgrade, B, ulevar despota Stefana 142, Belgrade, 11000, Serbia
| | - Rada Matić
- Institute for Biological Research, Department of Ecology, University of Belgrade, B, ulevar despota Stefana 142, Belgrade, 11000, Serbia
| | - Vera Vidaković
- Institute for Biological Research, Department of Ecology, University of Belgrade, B, ulevar despota Stefana 142, Belgrade, 11000, Serbia
| | - Srđan Bojović
- Institute for Biological Research, Department of Ecology, University of Belgrade, B, ulevar despota Stefana 142, Belgrade, 11000, Serbia
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162
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Gaubert J, Payri CE, Vieira C, Solanki H, Thomas OP. High metabolic variation for seaweeds in response to environmental changes: a case study of the brown algae Lobophora in coral reefs. Sci Rep 2019; 9:993. [PMID: 30700781 PMCID: PMC6353962 DOI: 10.1038/s41598-018-38177-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 12/12/2018] [Indexed: 02/02/2023] Open
Abstract
In the marine environment, macroalgae face changing environmental conditions and some species are known for their high capacity to adapt to the new factors of their ecological niche. Some macroalgal metabolites play diverse ecological functions and belong to the adaptive traits of such species. Because algal metabolites are involved in many processes that shape marine biodiversity, understanding their sources of variation and regulation is therefore of utmost relevance. This work aims at exploring the possible sources of metabolic variations with time and space of four common algal species from the genus Lobophora (Dictyotales, Phaeophyceae) in the New Caledonian lagoon using a UHPLC-HRMS metabolomic fingerprinting approach. While inter-specific differences dominated, a high variability of the metabolome was noticed for each species when changing their natural habitats and types of substrates. Fatty acids derivatives and polyolefins were identified as chemomarkers of these changing conditions. The four seaweeds metabolome also displayed monthly variations over the 13-months survey and a significant correlation was made with sea surface temperature and salinity. This study highlights a relative plasticity for the metabolome of Lobophora species.
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Affiliation(s)
- Julie Gaubert
- Sorbonne Universités, Collège Doctoral, F-75005, Paris, France.
- UMR ENTROPIE (IRD, UR, CNRS), Institut de Recherche pour le Développement, B.P. A5, 98848, Nouméa Cedex, Nouvelle-Calédonie, France.
| | - Claude E Payri
- UMR ENTROPIE (IRD, UR, CNRS), Institut de Recherche pour le Développement, B.P. A5, 98848, Nouméa Cedex, Nouvelle-Calédonie, France
| | - Christophe Vieira
- Phycology Research Group and Center for Molecular Phylogenetics and Evolution, Ghent University, Krijgslaan 281 (S8), 9000, Gent, Belgium
| | - Hiren Solanki
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, H91 TK33, Galway, Ireland
| | - Olivier P Thomas
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, H91 TK33, Galway, Ireland
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163
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Jeschke V, Weber K, Moore SS, Burow M. Coordination of Glucosinolate Biosynthesis and Turnover Under Different Nutrient Conditions. FRONTIERS IN PLANT SCIENCE 2019; 10:1560. [PMID: 31867028 PMCID: PMC6909823 DOI: 10.3389/fpls.2019.01560] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 11/07/2019] [Indexed: 05/19/2023]
Abstract
Dynamically changing environmental conditions promote a complex regulation of plant metabolism and balanced resource investments to development and defense. Plants of the Brassicales order constitutively allocate carbon, nitrogen, and sulfur to synthesize glucosinolates as their primary defense metabolites. Previous findings support a model in which steady-state levels of glucosinolates in intact tissues are determined by biosynthesis and turnover through a yet uncharacterized turnover pathway. To investigate glucosinolate turnover in the absence of tissue damage, we quantified exogenously applied allyl glucosinolate and endogenous glucosinolates under different nutrient conditions. Our data shows that, in seedlings of Arabidopsis thaliana accession Columbia-0, glucosinolate biosynthesis and turnover are coordinated according to nutrient availability. Whereas exogenous carbon sources had general quantitative effects on glucosinolate accumulation, sulfur or nitrogen limitation resulted in distinct changes in glucosinolate profiles, indicating that these macronutrients provide different regulatory inputs. Raphanusamic acid, a breakdown product that can potentially be formed from all glucosinolate structures appears not to reflect in planta turnover rates, but instead correlates with increased accumulation of endogenous glucosinolates. Thus, raphanusamic acid could represent a metabolic checkpoint that allows glucosinolate-producing plants to measure the flux through the biosynthetic and/or turnover pathways and thereby to dynamically adjust glucosinolate accumulation in response to internal and external signals.
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164
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Ullah C, Tsai C, Unsicker SB, Xue L, Reichelt M, Gershenzon J, Hammerbacher A. Salicylic acid activates poplar defense against the biotrophic rust fungus Melampsora larici-populina via increased biosynthesis of catechin and proanthocyanidins. THE NEW PHYTOLOGIST 2019; 221:960-975. [PMID: 30168132 PMCID: PMC6585937 DOI: 10.1111/nph.15396] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 07/10/2018] [Indexed: 05/14/2023]
Abstract
Poplar trees synthesize flavan-3-ols (catechin and proanthocyanidins) as a defense against foliar rust fungi, but the regulation of this defense response is poorly understood. Here, we investigated the role of hormones in regulating flavan-3-ol accumulation in poplar during rust infection. We profiled levels of defense hormones, signaling genes, and flavan-3-ol metabolites in black poplar leaves at different stages of rust infection. Hormone levels were manipulated by external sprays, genetic engineering, and drought to reveal their role in rust fungal defenses. Levels of salicylic acid (SA), jasmonic acid, and abscisic acid increased in rust-infected leaves and activated downstream signaling, with SA levels correlating closely with those of flavan-3-ols. Pretreatment with the SA analog benzothiadiazole increased flavan-3-ol accumulation by activating the MYB-bHLH-WD40 complex and reduced rust proliferation. Furthermore, transgenic poplar lines overproducing SA exhibited higher amounts of flavan-3-ols constitutively via the same transcriptional activation mechanism. These findings suggest a strong association among SA, flavan-3-ol biosynthesis, and rust resistance in poplars. Abscisic acid also promoted poplar defense against rust infection, but likely through stomatal immunity independent of flavan-3-ols. Jasmonic acid did not confer any apparent defense responses to the fungal pathogen. We conclude that SA activates flavan-3-ol biosynthesis in poplar against rust infection.
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Affiliation(s)
- Chhana Ullah
- Department of BiochemistryMax Planck Institute for Chemical EcologyHans‐Knöll‐Straße 807745JenaGermany
| | - Chung‐Jui Tsai
- School of Forestry and Natural ResourcesDepartment of GeneticsDepartment of Plant BiologyUniversity of GeorgiaAthensGA30602USA
| | - Sybille B. Unsicker
- Department of BiochemistryMax Planck Institute for Chemical EcologyHans‐Knöll‐Straße 807745JenaGermany
| | - Liangjiao Xue
- Key Laboratory of Forest Genetics and BiotechnologyCo‐Innovation Center for Sustainable Forestry in Southern ChinaCollege of ForestryNanjing Forestry UniversityNanjingJiangsu210037China
| | - Michael Reichelt
- Department of BiochemistryMax Planck Institute for Chemical EcologyHans‐Knöll‐Straße 807745JenaGermany
| | - Jonathan Gershenzon
- Department of BiochemistryMax Planck Institute for Chemical EcologyHans‐Knöll‐Straße 807745JenaGermany
| | - Almuth Hammerbacher
- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology InstituteUniversity of PretoriaPrivate Bag X20Pretoria0028South Africa
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165
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Foutami IJ, Mariager T, Rinnan R, Barnes CJ, Rønsted N. Hundred Fifty Years of Herbarium Collections Provide a Reliable Resource of Volatile Terpenoid Profiles Showing Strong Species Effect in Four Medicinal Species of Salvia Across the Mediterranean. FRONTIERS IN PLANT SCIENCE 2018; 9:1877. [PMID: 30619429 PMCID: PMC6305373 DOI: 10.3389/fpls.2018.01877] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 12/05/2018] [Indexed: 05/08/2023]
Abstract
Herbarium samples are increasingly being recognized for their potential in answering a wide range of research questions. However, the suitability of herbarium samples for chemical analysis is largely unexplored as they are thought to be too degraded. The aim of this study was to explore terpenoid profiles across time and geographic space for four medicinal species of Salvia across the Mediterranean to assess the suitability of using herbarium specimens in chemical analyses. Herbarium samples of Salvia aethiopis, S. multicaulis, S. officinalis, and S. sclarea collected over 150 years across the Mediterranean were compared to modern samples using both targeted and untargeted gas chromatography-mass spectrometry analysis of terpene profiles. There was no effect of collection year on chemical composition, although the total concentration of the 20 assessed standards and two individual standards significantly decreased over time. Instead, chemical profiles were defined by species, with strong species effects identified on both the targeted and untargeted chemical composition. Geographic variation was a factor in regulating the untargeted chemical compositions, suggesting some underlying environmental effects. However, there was no effect of sample altitude on either the targeted or untargeted chemical compositions. Chemical composition of four Salvia species are predominantly defined by species, and there was a substantially smaller effect of year of sampling. Given these results herbarium collections may well represent a considerably underused resource for chemical analyses that can benefit biodiversity and other studies.
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Affiliation(s)
- Isa Jafari Foutami
- Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Trine Mariager
- Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Riikka Rinnan
- Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | | | - Nina Rønsted
- Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
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166
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Barker HL, Holeski LM, Lindroth RL. Independent and interactive effects of plant genotype and environment on plant traits and insect herbivore performance: A meta‐analysis with Salicaceae. Funct Ecol 2018. [DOI: 10.1111/1365-2435.13249] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hilary L. Barker
- Department of Integrative Biology University of Wisconsin‐Madison Madison Wisconsin
| | - Liza M. Holeski
- Department of Biological Sciences Northern Arizona University Flagstaff Arizona
| | - Richard L. Lindroth
- Department of Integrative Biology University of Wisconsin‐Madison Madison Wisconsin
- Department of Entomology University of Wisconsin‐Madison Madison Wisconsin
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167
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Ida TY, Takanashi K, Tamura M, Ozawa R, Nakashima Y, Ohgushi T. Defensive chemicals of neighboring plants limit visits of herbivorous insects: Associational resistance within a plant population. Ecol Evol 2018; 8:12981-12990. [PMID: 30619598 PMCID: PMC6309010 DOI: 10.1002/ece3.4750] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 10/17/2018] [Accepted: 10/29/2018] [Indexed: 11/20/2022] Open
Abstract
Despite our understanding of chemical defenses and their consequences for plant performance and herbivores, we know little about whether defensive chemicals in plant tissues, such as alkaloids, and their spatial variation within a population play unappreciated and critical roles in plant-herbivore interactions. Neighboring plants can decrease or increase attractiveness of a plant to herbivores, an example of a neighborhood effect. Chemical defensive traits may contribute to neighborhood effects in plant-herbivore interactions. We examined the effects of nicotine in leaves (a non-emitted defense chemical) on plant-herbivore interactions in a spatial context, using two varieties of Nicotiana tabacum with different nicotine levels. A common garden experiment demonstrated that visits by grasshoppers decreased with increasing density of neighboring plants with a greater nicotine level. In contrast, visits of leaf caterpillars were not affected by neighbors, irrespective of nicotine levels. Thus, our results clearly highlighted that the neighborhood effect caused by the nicotine in leaves depended on the insect identity, and it was mediated by plant-herbivore interactions, rather than plant-plant interactions. This study demonstrates that understanding of effects of plant defensive traits on plant-herbivore interactions requires careful consideration of the spatial distribution of plant defenses, and provides support for the importance of spatial context to accurately capture the ecological and evolutionary consequences of plant-herbivore interactions.
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Affiliation(s)
- Takashi Y. Ida
- Center for Ecological ResearchKyoto UniversityOtsuJapan
- Present address:
Faculty of ScienceNara Women's UniversityNaraJapan
| | - Kojiro Takanashi
- Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan
- Present address:
Institute of Mountain ScienceShinshu UniversityMatsumotoJapan
| | | | - Rika Ozawa
- Center for Ecological ResearchKyoto UniversityOtsuJapan
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168
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de Souza VF, Niinemets Ü, Rasulov B, Vickers CE, Duvoisin Júnior S, Araújo WL, Gonçalves JFDC. Alternative Carbon Sources for Isoprene Emission. TRENDS IN PLANT SCIENCE 2018; 23:1081-1101. [PMID: 30472998 PMCID: PMC6354897 DOI: 10.1016/j.tplants.2018.09.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 09/03/2018] [Accepted: 09/25/2018] [Indexed: 05/07/2023]
Abstract
Isoprene and other plastidial isoprenoids are produced primarily from recently assimilated photosynthates via the 2-C-methyl-D-erythritol 4-phosphate (MEP) pathway. However, when environmental conditions limit photosynthesis, a fraction of carbon for MEP pathway can come from extrachloroplastic sources. The flow of extrachloroplastic carbon depends on the species and on leaf developmental and environmental conditions. The exchange of common phosphorylated intermediates between the MEP pathway and other metabolic pathways can occur via plastidic phosphate translocators. C1 and C2 carbon intermediates can contribute to chloroplastic metabolism, including photosynthesis and isoprenoid synthesis. Integration of these metabolic processes provide an example of metabolic flexibility, and results in the synthesis of primary metabolites for plant growth and secondary metabolites for plant defense, allowing effective use of environmental resources under multiple stresses.
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Affiliation(s)
- Vinícius Fernandes de Souza
- Laboratory of Plant Physiology and Biochemistry, National Institute for Amazonian Research (INPA), Manaus, AM 69011-970, Brazil; University of Amazonas State, Manaus, AM 69050-010, Brazil
| | - Ülo Niinemets
- Department of Crop Science and Plant Biology, Estonian University of Life Sciences, Tartu 51006, Estonia; Estonian Academy of Sciences, 10130 Tallinn, Estonia
| | - Bahtijor Rasulov
- Department of Crop Science and Plant Biology, Estonian University of Life Sciences, Tartu 51006, Estonia; Institute of Technology, University of Tartu, Tartu, Estonia
| | - Claudia E Vickers
- Australian Institute for Bioengineering and Nanotechnology, University of Queensland, St Lucia, QLD 4072, Australia; Commonwealth Scientific and Industrial Research Organisation (CSIRO) Synthetic Biology Future Science Platform, EcoSciences Precinct, Brisbane, QLD 4001, Australia
| | | | - Wagner L Araújo
- Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
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169
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Clancy MV, Zytynska SE, Moritz F, Witting M, Schmitt-Kopplin P, Weisser WW, Schnitzler JP. Metabotype variation in a field population of tansy plants influences aphid host selection. PLANT, CELL & ENVIRONMENT 2018; 41:2791-2805. [PMID: 30035804 DOI: 10.1111/pce.13407] [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: 11/17/2017] [Accepted: 07/10/2018] [Indexed: 05/15/2023]
Abstract
It is well known that plant volatiles influence herbivores in their selection of a host plant; however, less is known about how the nonvolatile metabolome affects herbivore host selection. Metabolic diversity between intraspecific plants can be characterized using non-targeted mass spectrometry that gives us a snapshot overview of all metabolic processes occurring within a plant at a particular time. Here, we show that non-targeted metabolomics can be used to reveal links between intraspecific chemical diversity and ecological processes in tansy (Tanacetum vulgare). First, we show that tansy plants can be categorized into five subgroups based up on their metabolic profiles, and that these "metabotypes" influenced natural aphid colonization in the field. Second, this grouping was not due to induced metabolomic changes within the plant due to aphid feeding but rather resulted from constitutive differences in chemical diversity between plants. These findings highlight the importance of intraspecific chemical diversity within one plant population and provide the first report of a non-targeted metabolomic field study in chemical ecology.
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Affiliation(s)
- Mary V Clancy
- Helmholtz Zentrum München, Institute of Biochemical Plant Pathology, Research Unit Environmental Simulation (EUS), Neuherberg, Germany
| | - Sharon E Zytynska
- Department of Ecology and Ecosystem Management, School of Life Sciences Weihenstephan, Technical University of Munich, Terrestrial Ecology Research Group, Freising, Germany
| | - Franco Moritz
- Helmholtz Zentrum München, Research Unit Analytical BioGeoChemistry (BCG), Neuherberg, Germany
| | - Michael Witting
- Helmholtz Zentrum München, Research Unit Analytical BioGeoChemistry (BCG), Neuherberg, Germany
- Chair of Analytical Food Chemistry, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Philippe Schmitt-Kopplin
- Helmholtz Zentrum München, Research Unit Analytical BioGeoChemistry (BCG), Neuherberg, Germany
- Chair of Analytical Food Chemistry, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany
| | - Wolfgang W Weisser
- Department of Ecology and Ecosystem Management, School of Life Sciences Weihenstephan, Technical University of Munich, Terrestrial Ecology Research Group, Freising, Germany
| | - Jörg-Peter Schnitzler
- Helmholtz Zentrum München, Institute of Biochemical Plant Pathology, Research Unit Environmental Simulation (EUS), Neuherberg, Germany
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170
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López-Goldar X, Villari C, Bonello P, Borg-Karlson AK, Grivet D, Zas R, Sampedro L. Inducibility of Plant Secondary Metabolites in the Stem Predicts Genetic Variation in Resistance Against a Key Insect Herbivore in Maritime Pine. FRONTIERS IN PLANT SCIENCE 2018; 9:1651. [PMID: 30519249 PMCID: PMC6258960 DOI: 10.3389/fpls.2018.01651] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 10/24/2018] [Indexed: 05/20/2023]
Abstract
Resistance to herbivores and pathogens is considered a key plant trait with strong adaptive value in trees, usually involving high concentrations of a diverse array of plant secondary metabolites (PSM). Intraspecific genetic variation and plasticity of PSM are widely known. However, their ecology and evolution are unclear, and even the implication of PSM as traits that provide direct effective resistance against herbivores is currently questioned. We used control and methyl jasmonate (MJ) induced clonal copies of genotypes within families from ten populations of the main distribution range of maritime pine to exhaustively characterize the constitutive and induced profile and concentration of PSM in the stem phloem, and to measure insect herbivory damage as a proxy of resistance. Then, we explored whether genetic variation in resistance to herbivory may be predicted by the constitutive concentration of PSM, and the role of its inducibility to predict the increase in resistance once the plant is induced. We found large and structured genetic variation among populations but not between families within populations in resistance to herbivory. The MJ-induction treatment strongly increased resistance to the weevil in the species, and the genetic variation in the inducibility of resistance was significantly structured among populations, with greater inducibility in the Atlantic populations. Genetic variation in resistance was largely explained by the multivariate concentration and profile of PSM at the genotypic level, rather than by bivariate correlations with individual PSM, after accounting for genetic relatedness among genotypes. While the constitutive concentration of the PSM blend did not show a clear pattern of resistance to herbivory, specific changes in the chemical profile and the increase in concentration of the PSM blend after MJ induction were related to increased resistance. To date, this is the first example of a comprehensive and rigorous approach in which inducibility of PSM in trees and its implication in resistance was analyzed excluding spurious associations due to genetic relatedness, often overlooked in intraspecific studies. Here we provide evidences that multivariate analyses of PSM, rather than bivariate correlations, provide more realistic information about the potentially causal relationships between PSM and resistance to herbivory in pine trees.
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Affiliation(s)
- Xosé López-Goldar
- Misión Biológica de Galicia, Consejo Superior de Investigaciones Científicas, Pontevedra, Spain
- Department of Plant Pathology, The Ohio State University, Columbus, OH, United States
- Ecological Chemistry Group, Department of Chemistry, Royal Institute of Technology, Stockholm, Sweden
- Department of Forest Ecology and Genetics, Forest Research Centre, INIA, Madrid, Spain
| | - Caterina Villari
- Department of Plant Pathology, The Ohio State University, Columbus, OH, United States
- Daniel B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States
| | - Pierluigi Bonello
- Department of Plant Pathology, The Ohio State University, Columbus, OH, United States
| | - Anna Karin Borg-Karlson
- Ecological Chemistry Group, Department of Chemistry, Royal Institute of Technology, Stockholm, Sweden
| | - Delphine Grivet
- Department of Forest Ecology and Genetics, Forest Research Centre, INIA, Madrid, Spain
- Sustainable Forest Management Research Institute, INIA-University of Valladolid, Palencia, Spain
| | - Rafael Zas
- Misión Biológica de Galicia, Consejo Superior de Investigaciones Científicas, Pontevedra, Spain
| | - Luís Sampedro
- Misión Biológica de Galicia, Consejo Superior de Investigaciones Científicas, Pontevedra, Spain
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171
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In Planta Sporulation of Frankia spp. as a Determinant of Alder-Symbiont Interactions. Appl Environ Microbiol 2018; 84:AEM.01737-18. [PMID: 30217853 DOI: 10.1128/aem.01737-18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 09/12/2018] [Indexed: 02/07/2023] Open
Abstract
The Alnus genus forms symbiosis with the actinobacteria Frankia spp. and ectomycorrhizal fungi. Two types of Frankia lineages can be distinguished based on their ability to sporulate in planta Spore-positive (Sp+) strains are predominant on Alnus incana and Alnus viridis in highlands, while spore-negative (Sp-) strains are mainly associated with Alnus glutinosa in lowlands. Here, we investigated whether the Sp+ predominance in nodules is due to host selection of certain Frankia genotypes from soil communities or the result of the ecological history of the alder stand soil, as well as the effect of the sporulation genotype on the ectomycorrhizal (ECM) communities. Trapping experiments were conducted using A. glutinosa, A. incana, and A. viridis plantlets on 6 soils, differing in the alder species and the frequency of Sp+ nodules in the field. Higher diversity of Frankia spp. and variation in Sp+ frequencies were observed in the trapping than in the fields. Both indigenous and trapping species shape Frankia community structure in trapped nodules. Nodulation impediments were observed under several trapping conditions in Sp+ soils, supporting a narrower host range of Sp+ Frankia species. A. incana and A. viridis were able to associate equally with compatible Sp+ and Sp- strains in the greenhouse. Additionally, no host shift was observed for Alnus-specific ECM, and the sporulation genotype of Frankia spp. defined the ECM communities on the host roots. The symbiotic association is likely determined by the host range, the soil history, and the type of in planta Frankia species. These results provide an insight into the biogeographical drivers of alder symbionts in the Holarctic region.IMPORTANCE Most Frankia-actinorhiza plant symbioses are capable of high rates of nitrogen fixation comparable to those found on legumes. Yet, our understanding of the ecology and distribution of Frankia spp. is still very limited. Several studies have focused on the distribution patterns of Frankia spp., demonstrating a combination of host and pedoclimatic parameters in their biogeography. However, very few have considered the in planta sporulation form of the strain, although it is a unique feature among all symbiotic plant-associated microbes. Compared with Sp- Frankia strains, Sp+ strains would be obligate symbionts that are highly dependent on the presence of a compatible host species and with lower efficiency in nitrogen fixation. Understanding the biogeographical drivers of Sp+ Frankia strains might help elucidate the ecological role of in planta sporulation and the extent to which this trait mediates host-partner interactions in the alder-Frankia-ECM fungal symbiosis.
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172
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Kessler A, Kalske A. Plant Secondary Metabolite Diversity and Species Interactions. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2018. [DOI: 10.1146/annurev-ecolsys-110617-062406] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ever since the first plant secondary metabolites (PSMs) were isolated and identified, questions about their ecological functions and diversity have been raised. Recent advances in analytical chemistry and complex data computation, as well as progress in chemical ecology from mechanistic to functional and evolutionary questions, open a new box of hypotheses. Addressing these hypotheses includes the measurement of complex traits, such as chemodiversity, in a context-dependent manner and allows for a deeper understanding of the multifunctionality and functional redundancy of PSMs. Here we review a hypothesis framework that addresses PSM diversity on multiple ecological levels (α, β, and γ chemodiversity), its variation in space and time, and the potential agents of natural selection. We use the concept of chemical information transfer as mediator of antagonistic and mutualistic interaction to interpret functional and microevolutionary studies and create a hypothesis framework for understanding chemodiversity as a factor driving ecological processes.
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Affiliation(s)
- André Kessler
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, USA;,
| | - Aino Kalske
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, USA;,
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173
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Li Z, Guo X, Cao Z, Liu X, Liao X, Huang C, Xu W, Liu L, Yang P. New MS network analysis pattern for the rapid identification of constituents from traditional Chinese medicine prescription Lishukang capsules in vitro and in vivo based on UHPLC/Q-TOF-MS. Talanta 2018; 189:606-621. [DOI: 10.1016/j.talanta.2018.07.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 05/26/2018] [Accepted: 07/10/2018] [Indexed: 01/07/2023]
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174
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de Simón BF, Cadahía E, Aranda I. Metabolic response to elevated CO 2 levels in Pinus pinaster Aiton needles in an ontogenetic and genotypic-dependent way. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 132:202-212. [PMID: 30216778 DOI: 10.1016/j.plaphy.2018.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 09/04/2018] [Accepted: 09/04/2018] [Indexed: 06/08/2023]
Abstract
Global climate changes involve elevated atmospheric [CO2], fostering the carbon allocation to tree sink tissues, partitioning it into metabolic pathways. We use metabolomics analysis in adult and juvenile needles of four Pinus pinaster genotypes exposed to two levels of growth [CO2]: ambient (400 μmol mol-1) and enriched (800 μmol mol-1), to know if the metabolic responses are genotype-dependent and vary according to the stage of needle ontogeny. The eCO2-induced changes in the needle metabolomes are more significant in secondary metabolism pathways and especially meaningful in juvenile needles. The heteroblasty has important consequences in the expression of the metabolome, and on the plasticity to CO2, determining the level of specific metabolite accumulation, showing an interdependence between adult and juvenile needles. The P. pinaster needle metabolomes also show clear quantitative differences linked to genotype, as well as regarding the metabolic response to eCO2, showing both, common and genotype-specific biochemical responses. Thus, the changes in flavonol levels are mainly genotype-independent, while those in terpenoid and free fatty acids are mainly genotype-dependent, ratifying the importance of genotype to determine the metabolic response to eCO2. To understand the adaptation mechanisms that tree species can develop to cope with eCO2 it is necessary to know the genetically distinct responses within a species to recognize the CO2-induced changes from the divergent approaches, what can facilitate knowing also the possible interrelation of the physiological and metabolic responses. That could explain the controversial effects of eCO2 on the carbon-based metabolite in conifers, at the inter- and intra-specific level.
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Affiliation(s)
- Brígida Fernández de Simón
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A., M.P. (INIA), Centro de Investigación Forestal, Carretera de La Coruña Km 7.5, 28040 Madrid, Spain.
| | - Estrella Cadahía
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A., M.P. (INIA), Centro de Investigación Forestal, Carretera de La Coruña Km 7.5, 28040 Madrid, Spain.
| | - Ismael Aranda
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A., M.P. (INIA), Centro de Investigación Forestal, Carretera de La Coruña Km 7.5, 28040 Madrid, Spain; Instituto de Investigaciones Agroambientales y de Economía Del Agua (INAGEA), Palma de Mallorca, Islas Baleares, Spain.
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175
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Dal Piaz F, Bader A, Malafronte N, D'Ambola M, Petrone AM, Porta A, Ben Hadda T, De Tommasi N, Bisio A, Severino L. Phytochemistry of compounds isolated from the leaf-surface extract of Psiadia punctulata (DC.) Vatke growing in Saudi Arabia. PHYTOCHEMISTRY 2018; 155:191-202. [PMID: 30149245 DOI: 10.1016/j.phytochem.2018.08.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 07/27/2018] [Accepted: 08/12/2018] [Indexed: 05/22/2023]
Abstract
The surface extract of an accession of Psiadia punctulata (DC.) Vatke (Asteraceae) growing in Saudi Arabia was investigated for its phytochemical composition. A bio-guided investigation of the extract led to the isolation of thirteen ent-kaurane and trachylobane diterpenes and seventeen compounds previously described, including nine flavonoids and eight diterpenes. Three flavonoids and one ent-kaurane diterpene showed antimicrobial activity with MIC100 values ranging from 25 to 150 μg/ml. The extract showed antibacterial activity against Staphylococcus aureus (MIC100 = 180 μg/ml) and antifungal activity against Candida albicans (MIC0 = 130 μg/ml). The isolated 3',4',5,7-tetramethoxyflavone, at a concentration of 40 μg/ml, displayed the ability to reduce biofilm formation of S. aureus and C. albicans by 50% and 90% respectively.
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Affiliation(s)
- Fabrizio Dal Piaz
- Department of Pharmacy, University of Salerno, Fisciano, Via Giovanni Paolo II, SA, Italy
| | - Ammar Bader
- Department of Pharmacognosy, Umm Al-Qura University, 21955, Makkah, Saudi Arabia
| | - Nicola Malafronte
- Department of Pharmacy, University of Salerno, Fisciano, Via Giovanni Paolo II, SA, Italy
| | - Massimiliano D'Ambola
- Department of Pharmacy, University of Salerno, Fisciano, Via Giovanni Paolo II, SA, Italy
| | - Anna Maria Petrone
- Department of Pharmacy, University of Salerno, Fisciano, Via Giovanni Paolo II, SA, Italy; PhD Program in Drug Discovery and Development, University of Salerno, Fisciano, SA, Italy
| | - Amalia Porta
- Department of Pharmacy, University of Salerno, Fisciano, Via Giovanni Paolo II, SA, Italy
| | - Taibi Ben Hadda
- LCM Laboratory, University of Mohammed Premier, Oujda, 60000, Morocco
| | - Nunziatina De Tommasi
- Department of Pharmacy, University of Salerno, Fisciano, Via Giovanni Paolo II, SA, Italy.
| | - Angela Bisio
- Department of Pharmacy, University of Genova, Viale Cembrano 4, 16148, Genova, Italy.
| | - Lorella Severino
- Department of Veterinary Medicine and Animal Production, University of Napoli Federico II, Via Delpino 1, 80137, Napoli, Italy
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Pellicer J, Saslis-Lagoudakis CH, Carrió E, Ernst M, Garnatje T, Grace OM, Gras A, Mumbrú M, Vallès J, Vitales D, Rønsted N. A phylogenetic road map to antimalarial Artemisia species. JOURNAL OF ETHNOPHARMACOLOGY 2018; 225:1-9. [PMID: 29936053 DOI: 10.1016/j.jep.2018.06.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The discovery of the antimalarial agent artemisinin is considered one of the most significant success stories of ethnopharmacological research in recent times. The isolation of artemisinin was inspired by the use of Artemisia annua in traditional Chinese medicine (TCM) and was awarded a Nobel Prize in 2015. Antimalarial activity has since been demonstrated for a range of other Artemisia species, suggesting that the genus could provide alternative sources of antimalarial treatments. Given the stunning diversity of the genus (c. 500 species), a prioritisation of taxa to be investigated for their likely antimalarial properties is required. MATERIALS AND METHODS Here we use a phylogenetic approach to explore the potential for identifying species more likely to possess antimalarial properties. Ethnobotanical data from literature reports is recorded for 117 species. Subsequent phylogenetically informed analysis was used to identify lineages in which there is an overrepresentation of species used to treat malarial symptoms, and which could therefore be high priority for further investigation of antimalarial activity. RESULTS We show that these lineages indeed include several species with documented antimalarial activity. To further inform our approach, we use LC-MS/MS analysis to explore artemisinin content in fifteen species from both highlighted and not highlighted lineages. We detected artemisinin in nine species, in eight of them for the first time, doubling the number of Artemisia taxa known to content this molecule. CONCLUSIONS Our findings indicate that artemisinin may be widespread across the genus, providing an accessible local resource outside the distribution area of Artemisia annua.
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Affiliation(s)
- Jaume Pellicer
- Comparative Plant and Fungal Biology Department, Royal Botanic Gardens, Kew, Richmond TW9 3AE, United Kingdom
| | - C Haris Saslis-Lagoudakis
- Natural History Museum of Denmark, Faculty of Science, University of Copenhagen, Øster Farimagsgade 5A, Copenhagen 1353, Denmark
| | - Esperança Carrió
- Laboratori de Botànica - Unitat associada CSIC, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028 Barcelona, Catalonia, Spain
| | - Madeleine Ernst
- Natural History Museum of Denmark, Faculty of Science, University of Copenhagen, Øster Farimagsgade 5A, Copenhagen 1353, Denmark
| | - Teresa Garnatje
- Institut Botànic de Barcelona (IBB, CSIC-ICUB), Passeig del Migdia sn, 08038 Barcelona, Catalonia, Spain
| | - Olwen M Grace
- Comparative Plant and Fungal Biology Department, Royal Botanic Gardens, Kew, Richmond TW9 3AE, United Kingdom
| | - Airy Gras
- Laboratori de Botànica - Unitat associada CSIC, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028 Barcelona, Catalonia, Spain
| | - Màrius Mumbrú
- Departament de Biologia, Sanitat i Medi Ambient, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028 Barcelona, Catalonia, Spain
| | - Joan Vallès
- Laboratori de Botànica - Unitat associada CSIC, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028 Barcelona, Catalonia, Spain
| | - Daniel Vitales
- Institut Botànic de Barcelona (IBB, CSIC-ICUB), Passeig del Migdia sn, 08038 Barcelona, Catalonia, Spain
| | - Nina Rønsted
- Natural History Museum of Denmark, Faculty of Science, University of Copenhagen, Øster Farimagsgade 5A, Copenhagen 1353, Denmark.
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Moreno-Ramírez YDR, Martínez-Ávila GCG, González-Hernández VA, Castro-López C, Torres-Castillo JA. Free Radical-Scavenging Capacities, Phenolics and Capsaicinoids in Wild Piquin Chili ( Capsicum annuum var. Glabriusculum). Molecules 2018; 23:E2655. [PMID: 30332792 PMCID: PMC6222680 DOI: 10.3390/molecules23102655] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 10/07/2018] [Accepted: 10/11/2018] [Indexed: 01/18/2023] Open
Abstract
The total phenolic compounds content, free radical-scavenging capacity and capsaicinoid content in populations of wild Piquin chili (C. annuum) were studied. Aqueous and hydroalcoholic extracts from nine ecotypes were evaluated. High contents of phenolic compounds and free radical-scavenging capacities were observed for both extracts; however, the values that were found for the hydroalcoholic phase were substantially higher. LC-MS analysis allowed for the detection of 32 compounds, where apigenin-8-C-glucoside followed by vanillic acid 1-O-β-o-glucopyranosylester (Isomer I or II) and 7-ethoxy-4-methylcoumarin were the most widely distributed; they were found in more than 89% of the ecotypes. The diversity of identified phenolic compounds was different among ecotypes, allowing them to be distinguished by chemical diversity, free radical-scavenging capacities and heat Scoville units. The total capsaicinoid content was higher in Population I (23.5 mg/g DW) than in Populations II and III, which had contents of 15.3 and 10.7 mg/g DW, respectively. This variability could lead to phytochemical exploitation and the conservation of the natural populations of wild chili.
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Affiliation(s)
- Yolanda Del Rocio Moreno-Ramírez
- Institute of Applied Ecology, Autonomous University of Tamaulipas, Gulf Division 356, Ciudad Victoria, 87019 Tamaulipas, Mexico.
| | - Guillermo C G Martínez-Ávila
- Laboratory of Chemistry and Biochemistry, School of Agronomy, Autonomous University of Nuevo Leon, General Escobedo, 66050 Nuevo Leon, Mexico.
| | - Víctor Arturo González-Hernández
- Posgrado de Recursos Genéticos y Productividad-Fisiología Vegetal, Colegio de Postgraduados, Texcoco, 56230 Estado de Mexico, Mexico.
| | - Cecilia Castro-López
- Laboratory of Chemistry and Biochemistry, School of Agronomy, Autonomous University of Nuevo Leon, General Escobedo, 66050 Nuevo Leon, Mexico.
| | - Jorge Ariel Torres-Castillo
- Institute of Applied Ecology, Autonomous University of Tamaulipas, Gulf Division 356, Ciudad Victoria, 87019 Tamaulipas, Mexico.
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178
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Reverter M, Tribalat MA, Pérez T, Thomas OP. Metabolome variability for two Mediterranean sponge species of the genus Haliclona: specificity, time, and space. Metabolomics 2018; 14:114. [PMID: 30830434 DOI: 10.1007/s11306-018-1401-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 07/25/2018] [Indexed: 01/01/2023]
Abstract
INTRODUCTION The study of natural variation of metabolites brings valuable information on the physiological state of the organisms as well as their phenotypic traits. In marine organisms, metabolome variability has mostly been addressed through targeted studies on metabolites of ecological or pharmaceutical interest. However, comparative metabolomics has demonstrated its potential to address the overall and complex metabolic variability of organisms. OBJECTIVES In this study, the intraspecific (temporal and spatial) variability of two Mediterranean Haliclona sponges (H. fulva and H. mucosa) was investigated through an untargeted and then targeted metabolomics approach and further compared to their interspecific variability. METHODS Samples of both species were collected monthly during 1 year in the coralligenous habitat of the Northwestern Mediterranean sae at Marseille and Nice. Their metabolomic profiles were obtained by UHPLC-QqToF analyses. RESULTS Marked variations were noticed in April and May for both species including a decrease in Shannon's diversity and concentration in specialized metabolites together with an increase in fatty acids and lyso-PAF like molecules. Spatial variations across different sampling sites could also be observed for both species, however in a lesser extent. CONCLUSIONS Synchronous metabolic changes possibly triggered by physiological factors like reproduction and/or environmental factors like an increase in the water temperature were highlighted for both Mediterranean Haliclona species inhabiting close habitats but displaying different biosynthetic pathways. Despite significative intraspecific variations, metabolomic variability remains minor when compared to interspecific variations for these congenerous species, therefore suggesting the predominance of genetic information of the holobiont in the observed metabolome.
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Affiliation(s)
- Miriam Reverter
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, Galway, H91 TK33, Ireland
| | - Marie-Aude Tribalat
- Geoazur, UMR Université Nice Sophia Antipolis-CNRS-IRD-OCA, 06560, Valbonne, France
| | - Thierry Pérez
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE), CNRS, IRD, Aix Marseille Université, Université Avignon, Station Marine d'Endoume, Rue de la Batterie des Lions, Marseille, France
| | - Olivier P Thomas
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, Galway, H91 TK33, Ireland.
- Geoazur, UMR Université Nice Sophia Antipolis-CNRS-IRD-OCA, 06560, Valbonne, France.
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179
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Zhao D, Shen Y, Shi Y, Shi X, Qiao Q, Zi S, Zhao E, Yu D, Kennelly EJ. Probing the transcriptome of Aconitum carmichaelii reveals the candidate genes associated with the biosynthesis of the toxic aconitine-type C 19-diterpenoid alkaloids. PHYTOCHEMISTRY 2018; 152:113-124. [PMID: 29758520 DOI: 10.1016/j.phytochem.2018.04.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 04/25/2018] [Accepted: 04/29/2018] [Indexed: 06/08/2023]
Abstract
Aconitum carmichaelii has long been used as a traditional Chinese medicine, and its processed lateral roots are known commonly as fuzi. Aconitine-type C19-diterpenoid alkaloids accumulating in the lateral roots are some of the main toxicants of this species, yet their biosynthesis remains largely unresolved. As a first step towards understanding the biosynthesis of aconitine-type C19-diterpenoid alkaloids, we performed de novo transcriptome assembly and analysis of rootstocks and leaf tissues of Aconitum carmichaelii by next-generation sequencing. A total of 525 unigene candidates were identified as involved in the formation of C19-diterpenoid alkaloids, including those encoding enzymes in the early steps of diterpenoid alkaloids scaffold biosynthetic pathway, such as ent-copalyl diphosphate synthases, ent-kaurene synthases, kaurene oxidases, cyclases, and key aminotransferases. Furthermore, candidates responsible for decorating of diterpenoid alkaloid skeletons were discovered from transcriptome sequencing of fuzi, such as monooxygenases, methyltransferase, and BAHD acyltransferases. In addition, 645 differentially expressed genes encoding transcription factors potentially related to diterpenoid alkaloids accumulation underground were documented. Subsequent modular domain structure phylogenetics and differential expression analysis led to the identification of BAHD acyltransferases possibly involved in the formation of acetyl and benzoyl esters of diterpenoid alkaloids, associated with the acute toxicity of fuzi. The transcriptome data provide the foundation for future research into the molecular basis for aconitine-type C19-diterpenoid alkaloids biosynthesis in A. carmichaelii.
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Affiliation(s)
- Dake Zhao
- Laboratory of Ecology and Evolutionary Biology, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan University, Kunming, China; Yunnan Institute of Materia Medica, Yunnan Baiyao Group Company Limited, Kunming, China; Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, China
| | - Yong Shen
- College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming, China
| | - Yana Shi
- Institute of Medicinal Plants, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Xingqiao Shi
- School of Agriculture, Yunnan University, Kunming, China
| | - Qin Qiao
- School of Agriculture, Yunnan University, Kunming, China
| | - Shuhui Zi
- School of Agriculture, Yunnan University, Kunming, China
| | - Erqiang Zhao
- School of Agriculture, Yunnan University, Kunming, China
| | - Diqiu Yu
- Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, China.
| | - Edward J Kennelly
- Department of Biological Sciences, Lehman College, City University of New York, United States; Ph.D. Programs in Biochemistry, Biology, and Chemistry, The Graduate Center, City University of New York, United States.
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180
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Berni R, Cantini C, Romi M, Hausman JF, Guerriero G, Cai G. Agrobiotechnology Goes Wild: Ancient Local Varieties as Sources of Bioactives. Int J Mol Sci 2018; 19:E2248. [PMID: 30071603 PMCID: PMC6121869 DOI: 10.3390/ijms19082248] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/27/2018] [Accepted: 07/30/2018] [Indexed: 11/23/2022] Open
Abstract
The identification and use of species that have best adapted to their growth territory is of paramount importance to preserve biodiversity while promoting sustainable agricultural practices. Parameters including resistance to natural conditions (biotic and abiotic risk factors), biomass and fruit productivity, and phytochemical content with nutraceutical potential, could be used as quantitative markers of the adaptability of plants to wild environments characterized by minimal human impact. Ancient varieties, which are plant varieties growing in regional territories and not destined for market distribution, are a source of unique genetic characters derived from many years of adaptation to the original territory. These plants are often more resistant to biotic and abiotic stresses. In addition, these varieties have a high phytochemical (also known as bioactives) content considered health-beneficial. Notably, the content of these compounds is often lower in commercial cultivars. The use of selected territorial varieties according to the cultivation area represents an opportunity in the agricultural sector in terms of biodiversity preservation, environmental sustainability, and valorization of the final products. Our survey highlights the nutraceutical potential of ancient local varieties and stresses the importance of holistic studies (-omics) to investigate their physiology and secondary metabolism.
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Affiliation(s)
- Roberto Berni
- Department of Life Sciences, University of Siena, via P.A. Mattioli 4, 53100 Siena, Italy.
- Trees and Timber Institute-National Research Council of Italy (CNR-IVALSA), via Aurelia 49, 58022 Follonica (GR), Italy.
| | - Claudio Cantini
- Trees and Timber Institute-National Research Council of Italy (CNR-IVALSA), via Aurelia 49, 58022 Follonica (GR), Italy.
| | - Marco Romi
- Department of Life Sciences, University of Siena, via P.A. Mattioli 4, 53100 Siena, Italy.
| | - Jean-Francois Hausman
- Research and Innovation Department, Luxembourg Institute of Science and Technology, 5 Avenue des Hauts-Fourneaux, L-4362 Esch/Alzette, Luxembourg.
| | - Gea Guerriero
- Research and Innovation Department, Luxembourg Institute of Science and Technology, 5 Avenue des Hauts-Fourneaux, L-4362 Esch/Alzette, Luxembourg.
| | - Giampiero Cai
- Department of Life Sciences, University of Siena, via P.A. Mattioli 4, 53100 Siena, Italy.
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181
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Wang WW, Zheng C, Hao WJ, Ma CL, Ma JQ, Ni DJ, Chen L. Transcriptome and metabolome analysis reveal candidate genes and biochemicals involved in tea geometrid defense in Camellia sinensis. PLoS One 2018; 13:e0201670. [PMID: 30067831 PMCID: PMC6070272 DOI: 10.1371/journal.pone.0201670] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/19/2018] [Indexed: 11/22/2022] Open
Abstract
Tea plant (Camellia sinensis (L) O. Kuntze) respond to herbivore attack through large changes in defense related metabolism and gene expression. Ectropis oblique (Prout) is one of the most devastating insects that feed on tea leaves and tender buds, which can cause severe production loss and deteriorate the quality of tea. To elucidate the biochemicals and molecular mechanism of defense against tea geometrid (TG), transcriptome and metabolome of TG interaction with susceptible (SG) and resistance (RG) tea genotypes were analyzed by using UPLC-Q-TOF-MS, GC-MS, and RNA-seq technologies. This revealed that jasmonic acid was highly induced in RG, following a plethora of secondary metabolites involved in defense against TG could be induced by jasmonic acid signaling pathway. However, the constitutively present of salicylic acid in SG might be a suppressor of jasmonate signaling and thus misdirect tea plants against TG. Furthermore, flavonoids and terpenoids biosynthesis pathways were highly activated in RG to constitute the chemical barrier on TG feeding behavior. In contrast, fructose and theanine, which can act as feeding stimulants were observed to highly accumulate in SG. Being present in the major hub, 39 transcription factors or protein kinases among putative candidates were identified as master regulators from protein-protein interaction network analysis. Together, the current study provides a comprehensive gene expression and metabolite profiles, which can shed new insights into the molecular mechanism of tea defense against TG. The candidate genes and specific metabolites identified in the present study can serve as a valuable resource for unraveling the possible defense mechanism of plants against various biotic stresses.
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Affiliation(s)
- Wei-Wei Wang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, National Center for Tea Improvement, Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, China
- Key Laboratory of Horticulture Plant Biology, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
| | - Chao Zheng
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, National Center for Tea Improvement, Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Wan-Jun Hao
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, National Center for Tea Improvement, Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Chun-Lei Ma
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, National Center for Tea Improvement, Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Jian-Qiang Ma
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, National Center for Tea Improvement, Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - De-Jiang Ni
- Key Laboratory of Horticulture Plant Biology, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
- * E-mail: (LC); (DJN)
| | - Liang Chen
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, National Center for Tea Improvement, Tea Research Institute of the Chinese Academy of Agricultural Sciences, Hangzhou, China
- * E-mail: (LC); (DJN)
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182
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Naidoo S, Christie N, Acosta JJ, Mphahlele MM, Payn KG, Myburg AA, Külheim C. Terpenes associated with resistance against the gall wasp, Leptocybe invasa, in Eucalyptus grandis. PLANT, CELL & ENVIRONMENT 2018; 41:1840-1851. [PMID: 29710389 DOI: 10.1111/pce.13323] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 04/13/2018] [Accepted: 04/17/2018] [Indexed: 05/24/2023]
Abstract
Leptocybe invasa is an insect pest causing gall formation on oviposited shoot tips and leaves of Eucalyptus trees leading to leaf deformation, stunting, and death in severe cases. We previously observed different constitutive and induced terpenes, plant specialized metabolites that may act as attractants or repellents to insects, in a resistant and susceptible clone of Eucalyptus challenged with L. invasa. We tested the hypothesis that specific terpenes are associated with pest resistance in a Eucalyptus grandis half-sib population. Insect damage was scored over 2 infestation cycles, and leaves were harvested for near-infrared reflectance (NIR) and terpene measurements. We used Bayesian model averaging for terpene selection and obtained partial least squares NIR models to predict terpene content and L. invasa infestation damage. In our optimal model, 29% of the phenotypic variation could be explained by 7 terpenes, and the monoterpene combination, limonene, α-terpineol, and 1,8-cineole, could be predicted with an NIR prediction ability of .67. Bayesian model averaging supported α-pinene, γ-terpinene, and iso-pinocarveol as important for predicting L. invasa infestation. Susceptibility was associated with increased γ-terpinene and α-pinene, which may act as a pest attractant, whereas reduced susceptibility was associated with iso-pinocarveol, which may act to recruit parasitoids or have direct toxic effects.
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Affiliation(s)
- Sanushka Naidoo
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private bag x20, Pretoria, 0028, South Africa
| | - Nanette Christie
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private bag x20, Pretoria, 0028, South Africa
| | - Juan J Acosta
- Camcore, Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, 27695-8008, USA
| | | | - Kitt G Payn
- Mondi Forests, Trahar Technology Centre, P.O. Box 12, Hilton, 3245, South Africa
| | - Alexander A Myburg
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private bag x20, Pretoria, 0028, South Africa
| | - Carsten Külheim
- Research School of Biology, Australian National University, 46 Sullivans Creek Road, Canberra, 2601, Australian Capital Territory, Australia
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183
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Kanekar SS, Cale JA, Erbilgin N. Ectomycorrhizal fungal species differentially affect the induced defensive chemistry of lodgepole pine. Oecologia 2018; 188:395-404. [DOI: 10.1007/s00442-018-4231-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 07/16/2018] [Indexed: 01/08/2023]
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184
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Iwanycki Ahlstrand N, Havskov Reghev N, Markussen B, Bruun Hansen HC, Eiriksson FF, Thorsteinsdóttir M, Rønsted N, Barnes CJ. Untargeted metabolic profiling reveals geography as the strongest predictor of metabolic phenotypes of a cosmopolitan weed. Ecol Evol 2018; 8:6812-6826. [PMID: 30038777 PMCID: PMC6053570 DOI: 10.1002/ece3.4195] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 03/30/2018] [Accepted: 04/22/2018] [Indexed: 12/27/2022] Open
Abstract
Plants produce a multitude of metabolites that contribute to their fitness and survival and play a role in local adaptation to environmental conditions. The effects of environmental variation are particularly well studied within the genus Plantago; however, previous studies have largely focused on targeting specific metabolites. Studies exploring metabolome-wide changes are lacking, and the effects of natural environmental variation and herbivory on the metabolomes of plants growing in situ remain unknown. An untargeted metabolomic approach using ultra-high-performance liquid chromatography-mass spectrometry, coupled with variation partitioning, general linear mixed modeling, and network analysis was used to detect differences in metabolic phenotypes of Plantago major in fifteen natural populations across Denmark. Geographic region, distance, habitat type, phenological stage, soil parameters, light levels, and leaf area were investigated for their relative contributions to explaining differences in foliar metabolomes. Herbivory effects were further investigated by comparing metabolomes from damaged and undamaged leaves from each plant. Geographic region explained the greatest number of significant metabolic differences. Soil pH had the second largest effect, followed by habitat and leaf area, while phenological stage had no effect. No evidence of the induction of metabolic features was found between leaves damaged by herbivores compared to undamaged leaves on the same plant. Differences in metabolic phenotypes explained by geographic factors are attributed to genotypic variation and/or unmeasured environmental factors that differ at the regional level in Denmark. A small number of specialized features in the metabolome may be involved in facilitating the success of a widespread species such as Plantago major into such wide range of environmental conditions, although overall resilience in the metabolome was found in response to environmental parameters tested. Untargeted metabolomic approaches have great potential to improve our understanding of how specialized plant metabolites respond to environmental change and assist in adaptation to local conditions.
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Affiliation(s)
| | | | - Bo Markussen
- Department of Mathematical SciencesUniversity of CopenhagenCopenhagenDenmark
| | | | | | | | - Nina Rønsted
- Natural History Museum of DenmarkUniversity of CopenhagenCopenhagenDenmark
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185
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Olsen KM, Small LL. Micro- and macroevolutionary adaptation through repeated loss of a complete metabolic pathway. THE NEW PHYTOLOGIST 2018; 219:757-766. [PMID: 29708583 DOI: 10.1111/nph.15184] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 03/27/2018] [Indexed: 05/27/2023]
Abstract
There is growing evidence for the convergent evolution of physically linked gene clusters encoding chemical defense pathways. Metabolic clusters are proposed to evolve because they ensure co-inheritance of all required genes where the defense is favored, and prevent inheritance of toxic partial pathways where it is not. This hypothesis rests on the assumption that clusters evolve in species where selection favors intraspecific polymorphism for the defense; however, they have not been examined in polymorphic species. We examined metabolic cluster evolution in relation to an adaptive polymorphism for cyanogenic glucoside (CNglc) production in clover. Using 163 accessions, we performed CNglc assays, BAC sequencing, Southern hybridizations and molecular evolutionary analyses. We find that the CNglc pathway forms a 138-kb cluster in white clover, and that the adaptive polymorphism occurs through presence/absence of the complete cluster. Component genes are orthologous to those in the distantly related legume Lotus japonicus. These findings provide empirical support for the co-inheritance hypothesis, and they indicate that adaptive CNglc variation in white clover evolves through recurrent deletions of the entire pathway. They further indicate that the shared ancestor of many important legume crops was likely cyanogenic and that this defense was lost repeatedly over the last 50 Myr.
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Affiliation(s)
- Kenneth M Olsen
- Biology Department, Washington University, Campus Box 1137, St Louis, MO, 63130-4899, USA
| | - Linda L Small
- Biology Department, Washington University, Campus Box 1137, St Louis, MO, 63130-4899, USA
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186
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Pais AL, Li X, (Jenny) Xiang Q. Discovering variation of secondary metabolite diversity and its relationship with disease resistance in Cornus florida L. Ecol Evol 2018; 8:5619-5636. [PMID: 29938079 PMCID: PMC6010843 DOI: 10.1002/ece3.4090] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/05/2018] [Accepted: 03/13/2018] [Indexed: 12/31/2022] Open
Abstract
Understanding intraspecific relationships between genetic and functional diversity is a major goal in the field of evolutionary biology and is important for conserving biodiversity. Linking intraspecific molecular patterns of plants to ecological pressures and trait variation remains difficult due to environment-driven plasticity. Next-generation sequencing, untargeted liquid chromatography-mass spectrometry (LC-MS) profiling, and interdisciplinary approaches integrating population genomics, metabolomics, and community ecology permit novel strategies to tackle this problem. We analyzed six natural populations of the disease-threatened Cornus florida L. from distinct ecological regions using genotype-by-sequencing markers and LC-MS-based untargeted metabolite profiling. We tested the hypothesis that higher genetic diversity in C. florida yielded higher chemical diversity and less disease susceptibility (screening hypothesis), and we also determined whether genetically similar subpopulations were similar in chemical composition. Most importantly, we identified metabolites that were associated with candidate loci or were predictive biomarkers of healthy or diseased plants after controlling for environment. Subpopulation clustering patterns based on genetic or chemical distances were largely congruent. While differences in genetic diversity were small among subpopulations, we did observe notable similarities in patterns between subpopulation averages of rarefied-allelic and chemical richness. More specifically, we found that the most abundant compound of a correlated group of putative terpenoid glycosides and derivatives was correlated with tree health when considering chemodiversity. Random forest biomarker and genomewide association tests suggested that this putative iridoid glucoside and other closely associated chemical features were correlated to SNPs under selection.
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Affiliation(s)
- Andrew L. Pais
- Department of Plant and Microbial BiologyNorth Carolina State UniversityRaleighNorth Carolina
| | - Xu Li
- Department of Plant and Microbial BiologyNorth Carolina State UniversityRaleighNorth Carolina
- Plants for Human Health InstituteNorth Carolina State UniversityKannapolisNorth Carolina
| | - Qiu‐Yun (Jenny) Xiang
- Department of Plant and Microbial BiologyNorth Carolina State UniversityRaleighNorth Carolina
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187
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Dyer LA, Philbin CS, Ochsenrider KM, Richards LA, Massad TJ, Smilanich AM, Forister ML, Parchman TL, Galland LM, Hurtado PJ, Espeset AE, Glassmire AE, Harrison JG, Mo C, Yoon S, Pardikes NA, Muchoney ND, Jahner JP, Slinn HL, Shelef O, Dodson CD, Kato MJ, Yamaguchi LF, Jeffrey CS. Modern approaches to study plant–insect interactions in chemical ecology. Nat Rev Chem 2018. [DOI: 10.1038/s41570-018-0009-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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188
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Tobias PA, Guest DI, Külheim C, Park RF. De Novo Transcriptome Study Identifies Candidate Genes Involved in Resistance to Austropuccinia psidii (Myrtle Rust) in Syzygium luehmannii (Riberry). PHYTOPATHOLOGY 2018; 108:627-640. [PMID: 29231777 DOI: 10.1094/phyto-09-17-0298-r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Austropuccinia psidii, causal agent of myrtle rust, was discovered in Australia in 2010 and has since become established on a wide range of species within the family Myrtaceae. Syzygium luehmannii, endemic to Australia, is an increasingly valuable berry crop. Plants were screened for responses to A. psidii inoculation, and specific resistance, in the form of localized necrosis, was determined in 29% of individuals. To understand the molecular basis underlying this response, mRNA was sequenced from leaf samples taken preinoculation, and at 24 and 48 h postinoculation, from four resistant and four susceptible plants. Analyses, based on de novo transcriptome assemblies for all plants, identified significant expression changes in resistant plants (438 transcripts) 48 h after pathogen exposure compared with susceptible plants (three transcripts). Most significantly up-regulated in resistant plants were gene homologs for transcription factors, receptor-like kinases, and enzymes involved in secondary metabolite pathways. A putative G-type lectin receptor-like kinase was exclusively expressed in resistant individuals and two transcripts incorporating toll/interleukin-1, nucleotide binding site, and leucine-rich repeat domains were up-regulated in resistant plants. The results of this study provide the first early gene expression profiles for a plant of the family Myrtaceae in response to the myrtle rust pathogen.
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Affiliation(s)
- Peri A Tobias
- First and second authors: Sydney Institute of Agriculture, School of Life and Environmental Sciences, University of Sydney, Biomedical Building C81, 1 Central Ave., Australian Technology Park, Eveleigh, NSW 2015, Australia; third author: Research School of Biology, College of Sciences, Australian National University, Canberra, ACT 2601, Australia; and fourth author: Plant Breeding Institute, School of Life and Environmental Sciences, University of Sydney, Private Bag 4011, Narellan, NSW 2567, Australia
| | - David I Guest
- First and second authors: Sydney Institute of Agriculture, School of Life and Environmental Sciences, University of Sydney, Biomedical Building C81, 1 Central Ave., Australian Technology Park, Eveleigh, NSW 2015, Australia; third author: Research School of Biology, College of Sciences, Australian National University, Canberra, ACT 2601, Australia; and fourth author: Plant Breeding Institute, School of Life and Environmental Sciences, University of Sydney, Private Bag 4011, Narellan, NSW 2567, Australia
| | - Carsten Külheim
- First and second authors: Sydney Institute of Agriculture, School of Life and Environmental Sciences, University of Sydney, Biomedical Building C81, 1 Central Ave., Australian Technology Park, Eveleigh, NSW 2015, Australia; third author: Research School of Biology, College of Sciences, Australian National University, Canberra, ACT 2601, Australia; and fourth author: Plant Breeding Institute, School of Life and Environmental Sciences, University of Sydney, Private Bag 4011, Narellan, NSW 2567, Australia
| | - Robert F Park
- First and second authors: Sydney Institute of Agriculture, School of Life and Environmental Sciences, University of Sydney, Biomedical Building C81, 1 Central Ave., Australian Technology Park, Eveleigh, NSW 2015, Australia; third author: Research School of Biology, College of Sciences, Australian National University, Canberra, ACT 2601, Australia; and fourth author: Plant Breeding Institute, School of Life and Environmental Sciences, University of Sydney, Private Bag 4011, Narellan, NSW 2567, Australia
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189
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Hsieh JF, Chuah A, Patel HR, Sandhu KS, Foley WJ, Külheim C. Transcriptome Profiling of Melaleuca quinquenervia Challenged by Myrtle Rust Reveals Differences in Defense Responses Among Resistant Individuals. PHYTOPATHOLOGY 2018; 108:495-509. [PMID: 29135360 DOI: 10.1094/phyto-09-17-0307-r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Plants have developed complex defense mechanisms to protect themselves against pathogens. A wide-host-range fungus, Austropuccinia psidii, which has caused severe damage to ecosystems and plantations worldwide, is a major threat to Australian ecosystems dominated by members of the family Myrtaceae. In particular, the east coast wetland foundation tree species Melaleuca quinquenervia, appears to be variably susceptible to this pathogen. Understanding the molecular basis of host resistance would enable better management of this rust disease. We identified resistant and susceptible individuals of M. quinquenervia and explored their differential gene expression in order to discover the molecular basis of resistance against A. psidii. Rust screening of germplasm showed a varying degree of response, with fully resistant to highly susceptible individuals. We used transcriptome profiling in samples collected before and at 5 days postinoculation (dpi). Differential gene expression analysis showed that numerous defense-related genes were induced in susceptible plants at 5 dpi. Mapping reads against the A. psidii genome showed that only susceptible plants contained fungal-derived transcripts. Resistant plants exhibited an overexpression of candidate A. psidii resistance-related genes such as receptor-like kinases, nucleotide-binding site leucine-rich repeat proteins, glutathione S-transferases, WRKY transcriptional regulators, and pathogenesis-related proteins. We identified large differences in the expression of defense-related genes among resistant individuals.
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Affiliation(s)
- Ji-Fan Hsieh
- First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia
| | - Aaron Chuah
- First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia
| | - Hardip R Patel
- First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia
| | - Karanjeet S Sandhu
- First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia
| | - William J Foley
- First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia
| | - Carsten Külheim
- First, fifth, and sixth authors: Research School of Biology, The Australian National University, 116 Daley Road, Canberra 2601, ACT, Australia; second and third authors: The John Curtin School of Medical Research, The Australian National University, 131 Garran Road, Canberra 2601, ACT, Australia; and fourth author: Plant Breeding Institute, The University of Sydney, 107 Cobbitty Road, Cobbitty 2570, NSW, Australia
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190
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Austen EJ, Lin SY, Forrest JRK. On the ecological significance of pollen color: a case study in American trout lily (Erythronium americanum). Ecology 2018; 99:926-937. [PMID: 29380868 DOI: 10.1002/ecy.2164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 12/13/2017] [Accepted: 12/18/2017] [Indexed: 11/09/2022]
Abstract
Evolutionary ecologists seek to explain the processes that maintain variation within populations. In plants, petal color variation can affect pollinator visitation, environmental tolerance, and herbivore deterrence. Variation in sexual organs may similarly affect plant performance. Within-population variation in pollen color, as occurs in the eastern North American spring ephemeral Erythronium americanum, provides an excellent opportunity to investigate the maintenance of variation in this trait. Although the red/yellow pollen-color polymorphism of E. americanum is widely recognized, it has been poorly documented. Our goals were thus (1) to determine the geographic distribution of the color morphs and (2) to test the effects of pollen color on components of pollen performance. Data provided by citizen scientists indicated that populations range from monomorphic red, to polymorphic, to monomorphic yellow, but there was no detectable geographic pattern in morph distribution, suggesting morph occurrence cannot be explained by a broad-scale ecological cline. In field experiments, we found no effect of pollen color on the probability of predation by the pollen-feeding beetle Asclera ruficollis, on the ability of pollen to tolerate UV-B radiation, or on siring success (as measured by the fruit set of hand-pollinated flowers). Pollinators, however, exhibited site-specific pollen-color preferences, suggesting they may act as agents of selection on this trait, and, depending on the constancy of their preferences, could contribute to the maintenance of variation. Collectively, our results eliminate some hypothesized ecological effects of pollen color in E. americanum, and identify effects of pollen color on pollinator attraction as a promising direction for future investigation.
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Affiliation(s)
- Emily J Austen
- Department of Biology, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.,Biology Department, Mount Allison University, Sackville, New Brunswick , E4L 1E4, Canada
| | - Shang-Yao Lin
- Department of Biology, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Jessica R K Forrest
- Department of Biology, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
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191
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Wang X, Chen Q, Wu Y, Lemmon ZH, Xu G, Huang C, Liang Y, Xu D, Li D, Doebley JF, Tian F. Genome-wide Analysis of Transcriptional Variability in a Large Maize-Teosinte Population. MOLECULAR PLANT 2018; 11:443-459. [PMID: 29275164 DOI: 10.1016/j.molp.2017.12.011] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 10/21/2017] [Accepted: 12/11/2017] [Indexed: 05/18/2023]
Abstract
Gene expression regulation plays an important role in controlling plant phenotypes and adaptation. Here, we report a comprehensive assessment of gene expression variation through the transcriptome analyses of a large maize-teosinte experimental population. Genome-wide mapping identified 25 660 expression quantitative trait loci (eQTL) for 17 311 genes, capturing an unprecedented range of expression variation. We found that local eQTL were more frequently mapped to adjacent genes, displaying a mode of expression piggybacking, which consequently created co-regulated gene clusters. Genes within the co-regulated gene clusters tend to have relevant functions and shared chromatin modifications. Distant eQTL formed 125 significant distant eQTL hotspots with their targets significantly enriched in specific functional categories. By integrating different sources of information, we identified putative trans- regulators for a variety of metabolic pathways. We demonstrated that the bHLH transcription factor R1 and hexokinase HEX9 might act as crucial regulators for flavonoid biosynthesis and glycolysis, respectively. Moreover, we showed that domestication or improvement has significantly affected global gene expression, with many genes targeted by selection. Of particular interest, the Bx genes for benzoxazinoid biosynthesis may have undergone coordinated cis-regulatory divergence between maize and teosinte, and a transposon insertion that inactivates Bx12 was under strong selection as maize spread into temperate environments with a distinct herbivore community.
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Affiliation(s)
- Xufeng Wang
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Qiuyue Chen
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Yaoyao Wu
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Zachary H Lemmon
- Department of Genetics, University of Wisconsin, Madison, WI 53706, USA
| | - Guanghui Xu
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Cheng Huang
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Yameng Liang
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Dingyi Xu
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - Dan Li
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China
| | - John F Doebley
- Department of Genetics, University of Wisconsin, Madison, WI 53706, USA
| | - Feng Tian
- National Maize Improvement Center of China, Beijing Key Laboratory of Crop Genetic Improvement, Laboratory of Crop Heterosis and Utilization, Joint International Research Laboratory of Crop Molecular Breeding, China Agricultural University, Beijing 100193, China.
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192
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Wuyun TN, Wang L, Liu H, Wang X, Zhang L, Bennetzen JL, Li T, Yang L, Liu P, Du L, Wang L, Huang M, Qing J, Zhu L, Bao W, Li H, Du Q, Zhu J, Yang H, Yang S, Liu H, Yue H, Hu J, Yu G, Tian Y, Liang F, Hu J, Wang D, Gao R, Li D, Du H. The Hardy Rubber Tree Genome Provides Insights into the Evolution of Polyisoprene Biosynthesis. MOLECULAR PLANT 2018; 11:429-442. [PMID: 29229569 DOI: 10.1016/j.molp.2017.11.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 11/14/2017] [Accepted: 11/28/2017] [Indexed: 05/21/2023]
Abstract
Eucommia ulmoides, also called hardy rubber tree, is an economically important tree; however, the lack of its genome sequence restricts the fundamental biological research and applied studies of this plant species. Here, we present a high-quality assembly of its ∼1.2-Gb genome (scaffold N50 = 1.88 Mb) with at least 26 723 predicted genes for E. ulmoides, the first sequenced genome of the order Garryales, which was obtained using an integrated strategy combining Illumina sequencing, PacBio sequencing, and BioNano mapping. As a sister taxon to lamiids and campanulids, E. ulmoides underwent an ancient genome triplication shared by core eudicots but no further whole-genome duplication in the last ∼125 million years. E. ulmoides exhibits high expression levels and/or gene number expansion for multiple genes involved in stress responses and the biosynthesis of secondary metabolites, which may account for its considerable environmental adaptability. In contrast to the rubber tree (Hevea brasiliensis), which produces cis-polyisoprene, E. ulmoides has evolved to synthesize long-chain trans-polyisoprene via farnesyl diphosphate synthases (FPSs). Moreover, FPS and rubber elongation factor/small rubber particle protein gene families were expanded independently from the H. brasiliensis lineage. These results provide new insights into the biology of E. ulmoides and the origin of polyisoprene biosynthesis.
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Affiliation(s)
- Ta-Na Wuyun
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China.
| | - Lin Wang
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Huimin Liu
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Xuewen Wang
- Department of Genetics, University of Georgia, Athens, GA 30602, USA
| | - Liangsheng Zhang
- Center for Genomics and Biotechnology; State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops; Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | | | - Tiezhu Li
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Lirong Yang
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Zhengzhou 450003, China
| | - Panfeng Liu
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Lanying Du
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Lu Wang
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Mengzhen Huang
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Jun Qing
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Lili Zhu
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Wenquan Bao
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Hongguo Li
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Qingxin Du
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Jingle Zhu
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China
| | - Hong Yang
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
| | - Shuguang Yang
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
| | - Hui Liu
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
| | - Hui Yue
- Shandong BELO EUCOMMIA Biological Engineering Co., Ltd., Qingzhou 262500, China
| | - Jiang Hu
- Nextomics Biosciences Co., Ltd., Wuhan 430073, China
| | - Guoliang Yu
- Nextomics Biosciences Co., Ltd., Wuhan 430073, China
| | - Yu Tian
- Nextomics Biosciences Co., Ltd., Wuhan 430073, China
| | - Fan Liang
- Nextomics Biosciences Co., Ltd., Wuhan 430073, China
| | - Jingjing Hu
- Wuhan Unique Gene Bioinformatics Science and Technology Co., Ltd., Wuhan 430073, China
| | - Depeng Wang
- Nextomics Biosciences Co., Ltd., Wuhan 430073, China
| | - Ruiwen Gao
- Shandong BELO EUCOMMIA Biological Engineering Co., Ltd., Qingzhou 262500, China.
| | - Dejun Li
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China.
| | - Hongyan Du
- Non-timber Forest Research and Development Center, Chinese Academy of Forestry, Zhengzhou 450003, China; The Eucommia Engineering Research Center of State Forestry Administration, Zhengzhou 450003, China.
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193
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Champagne E, Moore BD, Côté SD, Tremblay J. Spatial correlations between browsing on balsam fir by white-tailed deer and the nutritional value of neighboring winter forage. Ecol Evol 2018; 8:2812-2823. [PMID: 29531697 PMCID: PMC5838068 DOI: 10.1002/ece3.3878] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/20/2017] [Accepted: 12/26/2017] [Indexed: 12/03/2022] Open
Abstract
Associational effects, that is, the influence of neighboring plants on herbivory suffered by a plant, are an outcome of forage selection. Although forage selection is a hierarchical process, few studies have investigated associational effects at multiple spatial scales. Because the nutritional quality of plants can be spatially structured, it might differently influence associational effects across multiple scales. Our objective was to determine the radius of influence of neighbor density and nutritional quality on balsam fir (Abies balsamea) herbivory by white-tailed deer (Odocoileus virginianus) in winter. We quantified browsing rates on fir and the density and quality of neighboring trees in a series of 10-year-old cutovers on Anticosti Island (Canada). We used cross-correlations to investigate relationships between browsing rates and the density and nutritional quality of neighboring trees at distances up to 1,000 m. Balsam fir and white spruce (Picea glauca) fiber content and dry matter in vitro true digestibility were correlated with fir browsing rate at the finest extra-patch scale (across distance of up to 50 m) and between cutover areas (300-400 m). These correlations suggest associational effects, that is, low nutritional quality of neighbors reduces the likelihood of fir herbivory (associational defense). Our results may indicate associational effects mediated by intraspecific variation in plant quality and suggest that these effects could occur at scales from tens to hundreds of meters. Understanding associational effects could inform strategies for restoration or conservation; for example, planting of fir among existing natural regeneration could be concentrated in areas of low nutritional quality.
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Affiliation(s)
- Emilie Champagne
- Département de biologieCentre d’études nordiques & Chaire de recherche industrielle CRSNG en aménagement intégré des ressources de l’île d'AnticostiUniversité LavalQuébecCanada
- Centre d’étude de la forêtUniversité LavalQuébecCanada
| | - Ben D. Moore
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityRichmondNSWAustralia
| | - Steeve D. Côté
- Département de biologieCentre d’études nordiques & Chaire de recherche industrielle CRSNG en aménagement intégré des ressources de l’île d'AnticostiUniversité LavalQuébecCanada
| | - Jean‐Pierre Tremblay
- Département de biologieCentre d’études nordiques & Chaire de recherche industrielle CRSNG en aménagement intégré des ressources de l’île d'AnticostiUniversité LavalQuébecCanada
- Centre d’étude de la forêtUniversité LavalQuébecCanada
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194
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Espinosa-Gómez FC, Serio-Silva JC, Santiago-García JD, Sandoval-Castro CA, Hernández-Salazar LT, Mejía-Varas F, Ojeda-Chávez J, Chapman CA. Salivary tannin-binding proteins are a pervasive strategy used by the folivorous/frugivorous black howler monkey. Am J Primatol 2018; 80. [PMID: 29363818 DOI: 10.1002/ajp.22737] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 12/01/2017] [Accepted: 12/21/2017] [Indexed: 01/15/2023]
Abstract
Dietary tannins can affect protein digestion and absorption, be toxic, and influence food selection by being astringent and bitter tasting. Animals that usually ingest tannins may regularly secrete tannin-binding salivary proteins (TBSPs) to counteract the negative effects of tannins or TBSPs production can be induced by a tannin-rich diet. In the wild, many primates regularly eat a diet that contains tannin-rich leaves and unripe fruit and it has been speculated that they have the physiological ability to cope with dietary tannins; however, details of their strategy remains unclear. Our research details the salivary protein composition of wild and zoo-living black howler monkeys (Alouatta pigra) feeding on natural versus manufactured low-tannin diets, and examines differences in TBSPs, mainly proline-rich proteins (PRPs), to determine whether production of these proteins is dependent on the tannin content of their food. We measured the pH, flow rate, and concentration of total protein and trichloroacetic acid soluble proteins (an index of PRPs) in saliva. Howler monkeys produced slightly alkaline saliva that may aid in the binding interaction between tannin and salivary proteins. We used gel electrophoresis to describe the salivary protein profile and this analysis along with a tannin-binding assay allowed us to detect several TBSPs in all individuals. We found no differences in the characteristics of saliva between wild and zoo-living monkeys. Our results suggest that black howler monkeys always secrete TBSPs even when fed on foods low in tannins. This strategy of constantly using this salivary anti-tannin defense enables them to obtain nutrients from plants that sometimes contain high levels of tannins and may help immediately to overcome the astringent sensation of their food allowing howler monkeys to eat tanniferous plants.
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Affiliation(s)
- Fabiola Carolina Espinosa-Gómez
- McGill School of Environment and Department of Anthropology, McGill University, Montreal, Quebec, Canada.,Red de Biología y Conservación de Vertebrados, Instituto de Ecología AC, Xalapa, México
| | | | | | | | | | - Fernando Mejía-Varas
- Departamento de Servicios Veterinarios, Zoológico de Zacango, Estado de México, México
| | - Javier Ojeda-Chávez
- Dirección General de Zoológicos y Vida Silvestre, Zoológico de Chapultepec, Ciudad de México, México
| | - Colin Austin Chapman
- McGill School of Environment and Department of Anthropology, McGill University, Montreal, Quebec, Canada.,Wildlife Conservation Society, Bronx, New York.,Section of Social Systems Evolution, Primate Research Institute, Kyoto University, Kyoto, Japan
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195
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Garnick S, Di Stefano J, Moore BD, Davis NE, Elgar MA, Coulson G. Interspecific and intraspecific relationships between body mass and diet quality in a macropodid community. J Mammal 2018. [DOI: 10.1093/jmammal/gyx183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Sarah Garnick
- School of BioSciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Julian Di Stefano
- School of Ecosystem and Forest Sciences, University of Melbourne, Creswick, Victoria, Australia
| | - Ben D Moore
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, New South Wales, Australia
| | - Naomi E Davis
- School of BioSciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Mark A Elgar
- School of BioSciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Graeme Coulson
- School of BioSciences, University of Melbourne, Melbourne, Victoria, Australia
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196
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Fu R, Martin C, Zhang Y. Next-Generation Plant Metabolic Engineering, Inspired by an Ancient Chinese Irrigation System. MOLECULAR PLANT 2018; 11:47-57. [PMID: 28893713 DOI: 10.1016/j.molp.2017.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/06/2017] [Accepted: 09/01/2017] [Indexed: 05/03/2023]
Abstract
Specialized secondary metabolites serve not only to protect plants against abiotic and biotic challenges, but have also been used extensively by humans to combat diseases. Due to the great importance of medicinal plants for health, we need to find new and sustainable ways to improve the production of the specialized metabolites. In addition to direct extraction, recent progress in metabolic engineering of plants offers an alternative supply option. We argue that metabolic engineering for producing the secondary metabolites in plants may have distinct advantages over microbial production platforms, and thus propose new approaches of plant metabolic engineering, which are inspired by an ancient Chinese irrigation system. Metabolic engineering strategies work at three levels: introducing biosynthetic genes, using transcription factors, and improving metabolic flux including increasing the supply of precursors, energy, and reducing power. In addition, recent progress in biotechnology contributes markedly to better engineering, such as the use of specific promoters and the deletion of competing branch pathways. We propose that next-generation plant metabolic engineering will improve current engineering strategies, for the purpose of producing valuable metabolites in plants on industrial scales.
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Affiliation(s)
- Rao Fu
- Key Laboratory of Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China
| | - Cathie Martin
- Department of Metabolic Biology, John Innes Centre, Norwich NR4 7UH, UK
| | - Yang Zhang
- Key Laboratory of Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China.
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197
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Nagler M, Nägele T, Gilli C, Fragner L, Korte A, Platzer A, Farlow A, Nordborg M, Weckwerth W. Eco-Metabolomics and Metabolic Modeling: Making the Leap From Model Systems in the Lab to Native Populations in the Field. FRONTIERS IN PLANT SCIENCE 2018; 9:1556. [PMID: 30459786 PMCID: PMC6232504 DOI: 10.3389/fpls.2018.01556] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 10/04/2018] [Indexed: 05/05/2023]
Abstract
Experimental high-throughput analysis of molecular networks is a central approach to characterize the adaptation of plant metabolism to the environment. However, recent studies have demonstrated that it is hardly possible to predict in situ metabolic phenotypes from experiments under controlled conditions, such as growth chambers or greenhouses. This is particularly due to the high molecular variance of in situ samples induced by environmental fluctuations. An approach of functional metabolome interpretation of field samples would be desirable in order to be able to identify and trace back the impact of environmental changes on plant metabolism. To test the applicability of metabolomics studies for a characterization of plant populations in the field, we have identified and analyzed in situ samples of nearby grown natural populations of Arabidopsis thaliana in Austria. A. thaliana is the primary molecular biological model system in plant biology with one of the best functionally annotated genomes representing a reference system for all other plant genome projects. The genomes of these novel natural populations were sequenced and phylogenetically compared to a comprehensive genome database of A. thaliana ecotypes. Experimental results on primary and secondary metabolite profiling and genotypic variation were functionally integrated by a data mining strategy, which combines statistical output of metabolomics data with genome-derived biochemical pathway reconstruction and metabolic modeling. Correlations of biochemical model predictions and population-specific genetic variation indicated varying strategies of metabolic regulation on a population level which enabled the direct comparison, differentiation, and prediction of metabolic adaptation of the same species to different habitats. These differences were most pronounced at organic and amino acid metabolism as well as at the interface of primary and secondary metabolism and allowed for the direct classification of population-specific metabolic phenotypes within geographically contiguous sampling sites.
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Affiliation(s)
- Matthias Nagler
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
| | - Thomas Nägele
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
- LMU Munich, Plant Evolutionary Cell Biology, Munich, Germany
| | - Christian Gilli
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
| | - Lena Fragner
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
- Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria
| | - Arthur Korte
- Center for Computational and Theoretical Biology, University of Würzburg, Würzburg, Germany
| | - Alexander Platzer
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna, Austria
| | - Ashley Farlow
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna, Austria
| | - Magnus Nordborg
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna, Austria
| | - Wolfram Weckwerth
- Department of Ecogenomics and Systems Biology, University of Vienna, Vienna, Austria
- Vienna Metabolomics Center (VIME), University of Vienna, Vienna, Austria
- *Correspondence: Wolfram Weckwerth,
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198
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Soliman T, Reimer JD, Yang SY, Villar-Briones A, Roy MC, Jenke-Kodama H. Diversity of Microbial Communities and Quantitative Chemodiversity in Layers of Marine Sediment Cores from a Causeway (Kaichu-Doro) in Okinawa Island, Japan. Front Microbiol 2017; 8:2451. [PMID: 29321767 PMCID: PMC5732179 DOI: 10.3389/fmicb.2017.02451] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 11/27/2017] [Indexed: 12/22/2022] Open
Abstract
Microbial community diversity and chemodiversity were investigated in marine sediments adjacent to the Okinawan “Kaichu-Doro” Causeway, which was constructed 46 years ago to connect a group of four islands (Henza-jima, Miyagi-jima, Ikei-jima, Hamahiga-jima) to the Okinawan main island. This causeway was not built on pilings, but by land reclamation; hence, it now acts as a long, thin peninsula. The construction of this causeway was previously shown to have influenced the surrounding marine ecosystem, causing ecosystem fragmentation and loss of water circulation. In this study, we collected sediment cores (n = 10) from five paired sites in 1 m water depths. Each pair of sites consisted of one site each on the immediate north and south sides of the causeway. Originally the members of each pair were much closer to each other (<150 m) than to other pairs, but now the members of each pair are isolated by the causeway. Each core was 60–80 cm long and was divided into 15-cm layers. We examined the vertical diversity of microbial communities and chemical compounds to determine the correlation between chemodiversity and microbial communities among marine sediment cores and layers. Principal coordinate analyses (PCoA) of detected compounds and of bacterial and archaeal operational taxonomic units (OTUs) revealed that the north and south sides of the causeway are relatively isolated, with each side having unique microbial OTUs. Additionally, some bacterial families (e.g., Acidaminobacteraceae, Rhizobiaceae, and Xanthomonadaceae) were found only on the south side of Kaichu-Doro. Interestingly, we found that the relative abundance of OTUs for some microbial families increased from top to bottom, but this was reversed in some other families. We conclude that the causeway has altered microbial community composition and metabolite profiles in marine sediments.
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Affiliation(s)
- Taha Soliman
- Microbiology and Biochemistry of Secondary Metabolites Unit, Okinawa Institute of Science and Technology Graduate University (OIST), Kunigami, Japan.,Molecular Invertebrate Systematics and Ecology Laboratory, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Japan.,Genetics and Genetic Engineering Research Group, National Institute of Oceanography and Fisheries (NIOF), Cairo, Egypt
| | - James D Reimer
- Molecular Invertebrate Systematics and Ecology Laboratory, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Japan.,Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Japan
| | - Sung-Yin Yang
- Microbiology and Biochemistry of Secondary Metabolites Unit, Okinawa Institute of Science and Technology Graduate University (OIST), Kunigami, Japan.,Biodiversity Research Center, Academia Sinica, Taipei, Taiwan
| | - Alejandro Villar-Briones
- Imaging and Instrumental Analysis Section, Okinawa Institute of Science and Technology Graduate University (OIST), Kunigami, Japan
| | - Michael C Roy
- Imaging and Instrumental Analysis Section, Okinawa Institute of Science and Technology Graduate University (OIST), Kunigami, Japan
| | - Holger Jenke-Kodama
- Microbiology and Biochemistry of Secondary Metabolites Unit, Okinawa Institute of Science and Technology Graduate University (OIST), Kunigami, Japan
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199
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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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200
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Saraf I, Marsh KJ, Vir S, Foley WJ, Singh IP. Quantitative Analysis of Various B-ring Unsubstituted and Substituted Flavonoids in Ten Australian Species of Eucalyptus. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701201109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Flavonoids (in particular unsubstituted B ring flavanones) in Eucalyptus foliage play an important role in mediating animal plant interactions, and there is a need for methods to analyse the diverse profiles found in leaves. A simple, high-performance liquid chromatographic (HPLC) method with in-line connected photodiode-array (PDA) detection was developed and validated to identify and quantify nine B-ring unsubstituted and three B-ring substituted flavonoids in ten Australian species of Eucalyptus. Of these, eight compounds were detected and quantified in the crude methanolic extracts of leaves of various Eucalyptus species ( E. sieberi, E. rossii, E. fastigata, E. macrorhyncha, E. fraxinoides, E. agglomerata, E. consideniana, E. pauciflora, E. dives and E. obliqua) based on comparison with the retention times and λmax values of pure compounds. This rapid and sensitive HPLC/PDA method was coupled with electrospray ionization mass spectrometry (HPLC-ESI-MS) for qualitative analysis to corroborate the identification of compounds by HPLC/PDA analysis.
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Affiliation(s)
- Isha Saraf
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, 160062, Punjab, India
| | - Karen J. Marsh
- Research School of Biology, The Australian National University, Canberra 2601, Australia
| | - Sanjay Vir
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, 160062, Punjab, India
| | - William J. Foley
- Research School of Biology, The Australian National University, Canberra 2601, Australia
| | - Inder Pal Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, 160062, Punjab, India
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