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Lang T, Ke X, Wei J, Hussain M, Li M, Gao C, Jiang M, Wang Y, Fu Y, Wu K, Zhang W, Tam NFY, Zhou H. Dynamics of tannin variations in mangrove leaf litter decomposition and their effects on environmental nitrogen and microbial activity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168150. [PMID: 37918719 DOI: 10.1016/j.scitotenv.2023.168150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/04/2023]
Abstract
Tannins play vital roles in regulating ecological processes in mangrove forests. However, how tannins affect nitrogen (N) cycling and microbial metabolism in mangrove ecosystems remains largely unexplored. In this study, we hypothesized the types and amounts of tannins released into seawater and sediments during leaf litter decomposition differed among mangrove plant species, thus their effects on N and microbial metabolism also varied. The alterations of tannins, and environmental N and microbial metabolism during leaf litter decomposition of Kandelia obovata, Avicennia marina, and Sonneratia apetala were evaluated by a microcosm-simulated tidal system. Results showed that total polyphenols (TPs) in seawater treated with K. obovata litter were significantly higher than those in A. marina and S. apetala treatments, although the trends of TP changes elicited an initial increase followed by a decrease during decomposition. The dynamic changes in TPs reduced the seawater N concentrations in K. obovata treatment but not in A. marina and S. apetala treatments. The results of microbial metabolism analysis revealed that leaf litter significantly increased microbial metabolic activities and diversities. The types of carbon sources utilized by sediment microorganisms differed among treatments, with the microbes in S. apetala and A. marina litter used more varieties of amino acids, lipids and sugars than those in K. obovata treatment, probably due to the rich amount of hydrolysable tannins (HTs) in the first two species while the last species only contained ondensed tannins (CTs). CTs released from K. obovata leaf litter not only bound nitrogen-containing macromolecular compounds such as amino acids and proteins but also carbohydrates like polysaccharides, which decreased the supply of C and N to sediment microbiota. These results reveal that the release of mangrove tannins during leaf litter decomposition is one of the key factors driving N cycling, and microbial activities and diversities in mangrove wetlands.
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Affiliation(s)
- Tao Lang
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China; Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, Nanning 530008, China
| | - Xinran Ke
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
| | - Jian Wei
- Institute of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing 100091, China
| | - Muzammil Hussain
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China
| | - Mingdang Li
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China
| | - Changjun Gao
- Guangdong Academy of Forestry, Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangzhou 510520, China
| | - Mingguo Jiang
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, Nanning 530008, China
| | - Yibing Wang
- Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, Nanning 530008, China
| | - Yijian Fu
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China
| | - Kunhua Wu
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China
| | - Wenyan Zhang
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China
| | - Nora Fung-Yee Tam
- Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China; Department of Science, School of Science and Technology, Hong Kong Metropolitan University, Ho Man Tin, Kowloon, Hong Kong 999077, China
| | - Haichao Zhou
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-resource and Eco-environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, Shenzhen 518040, China.
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Plant resistance does not compromise parasitoid-based biocontrol of a strawberry pest. Sci Rep 2020; 10:5899. [PMID: 32246069 PMCID: PMC7125231 DOI: 10.1038/s41598-020-62698-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/16/2020] [Indexed: 11/09/2022] Open
Abstract
Plant nutritional quality can influence interactions between herbivores and their parasitoids. While most previous work has focused on a limited set of secondary plant metabolites, the tri-trophic effects of overall phenotypic resistance have been understudied. Furthermore, the joint effects of secondary and primary metabolites on parasitoids are almost unexplored. In this study, we compared the performance and survival of the parasitoid species Asecodes parviclava Thompson on wild woodland strawberry (Fragaria vesca L.) genotypes showing variation in resistance against the parasitoid's host, the strawberry leaf beetle (Galerucella tenella L.). Additionally, we related the metabolic profiles of these plant genotypes to the tritrophic outcomes in order to identify primary and secondary metabolites involved in regulating plant potential to facilitate parasitism. We found that parasitoid performance was strongly affected by plant genotype, but those differences in plant resistance to the herbivore were not reflected in parasitoid survival. These findings could be explained in particular by a significant link between parasitoid survival and foliar carbohydrate levels, which appeared to be the most important compounds for parasitism success. The fact that plant quality strongly affects parasitism should be further explored and utilized in plant breeding programs for a synergistic application in sustainable pest management.
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Mouden S, Klinkhamer PGL, Choi YH, Leiss KA. Towards eco-friendly crop protection: natural deep eutectic solvents and defensive secondary metabolites. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2017; 16:935-951. [PMID: 29167631 PMCID: PMC5674125 DOI: 10.1007/s11101-017-9502-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 03/15/2017] [Indexed: 05/04/2023]
Abstract
With mounting concerns over health and environmental effects of pesticides, the search for environmentally acceptable substitutes has amplified. Plant secondary metabolites appear in the horizon as an attractive solution for green crop protection. This paper reviews the need for changes in the techniques and compounds that, until recently, have been the mainstay for dealing with pest insects. Here we describe and discuss main strategies for selecting plant-derived metabolites as candidates for sustainable agriculture. The second part surveys ten important insecticidal compounds, with special emphasis on those involved in human health. Many of these insecticidal metabolites, however, are crystalline solids with limited solubility which might potentially hamper commercial formulation. As such, we introduce the concept of natural deep eutectic solvents for enhancing solubility and stability of such compounds. The concept, principles and examples of green pest control discussed here offer a new suite of environmental-friendly tools designed to promote and adopt sustainable agriculture.
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Affiliation(s)
- Sanae Mouden
- Research Group Plant Ecology and Phytochemistry, Institute of Biology, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands
| | - Peter G. L. Klinkhamer
- Research Group Plant Ecology and Phytochemistry, Institute of Biology, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands
| | - Young Hae Choi
- Natural Products Laboratory, Institute of Biology, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands
| | - Kirsten A. Leiss
- Research Group Plant Ecology and Phytochemistry, Institute of Biology, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands
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Phenolic Compounds and Their Fates In Tropical Lepidopteran Larvae: Modifications In Alkaline Conditions. J Chem Ecol 2015; 41:822-36. [PMID: 26364295 DOI: 10.1007/s10886-015-0620-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 03/26/2015] [Accepted: 08/10/2015] [Indexed: 10/23/2022]
Abstract
Lepidopteran larvae encounter a variety of phenolic compounds while consuming their host plants. Some phenolics may oxidize under alkaline conditions prevailing in the larval guts, and the oxidation products may cause oxidative stress to the larvae. In this study, we aimed to find new ways to predict how phenolic compounds may be modified in the guts of herbivorous larvae. To do so, we studied the ease of oxidation of phenolic compounds from 12 tropical tree species. The leaf extracts were incubated in vitro in alkaline conditions, and the loss of total phenolics during incubation was used to estimate the oxidizability of extracts. The phenolic profiles of the leaf extracts before and after incubation were compared, revealing that some phenolic compounds were depleted during incubation. The leaves of the 12 tree species were each fed to 12 species of lepidopteran larvae that naturally feed on these trees. The phenolic profiles of larval frass were compared to those of in vitro incubated leaf extracts. These comparisons showed that the phenolic profiles of alkali-treated samples and frass samples were similar in many cases. This suggested that certain phenolics, such as ellagitannins, proanthocyanidins, and galloylquinic acid derivatives were modified by the alkaline pH of the larval gut. In other cases, the chromatographic profiles of frass and in vitro incubated leaf extracts were not similar, and new modifications of phenolics were detected in the frass. We conclude that the actual fates of phenolics in vivo are often more complicated than can be predicted by a simple in vitro method.
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Liu F, Kozlovskaya V, Zavgorodnya O, Martinez-Lopez C, Catledge S, Kharlampieva E. Encapsulation of anticancer drug by hydrogen-bonded multilayers of tannic acid. SOFT MATTER 2014; 10:9237-47. [PMID: 25284271 DOI: 10.1039/c4sm01813c] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Tannic acid (TA)-based multilayer assemblies have attracted increasing interest for biomedical applications. Here we explore properties of TA-poly(N-vinylpyrrolidone) (TA-PVPON) hydrogen-bonded multilayers for drug encapsulation and long-term storage. We demonstrate that the small molecular weight anticancer drug, doxorubicin (DOX), can be successfully loaded into (TA-PVPON) capsules with high encapsulation efficiency. We have also found that the encapsulated DOX can be efficiently stored inside the capsules for the pH range from pH = 7.4 to pH = 5. We show that the chemical and functional stability of TA at neutral and basic pH values is achieved through complexation with PVPON. The UV-vis spectrophotometry and in situ ellipsometry analyses of the hydrogen bonding interactions between TA and PVPON at different pH values reveal pH-dependent behavior of TA-PVPON capsules for the pH range from pH = 7.4 to pH = 5. Increasing deposition pH value from pH = 5 to pH = 7.4 leads to a 2-fold decrease in capsule thickness. However, this trend is reversed when salt concentration of the deposition solutions is increased from 0.01 M to 0.1 M NaCl. We have also demonstrated that the permeability of (TA-PVPON) capsules prepared using low salt deposition conditions and pH = 7.4 can be increased 2-fold by exposure of the capsules to 0.1 M NaCl salt solutions at the same pH. Our work opens new perspectives for design of novel polymer carriers for controlled drug delivery in cancer therapy.
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Affiliation(s)
- Fei Liu
- Department of Chemistry, University of Alabama at Birmingham, 901 14th St South, CHEM294, Birmingham, AL 35294, USA.
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Bénard C, Bourgaud F, Gautier H. Impact of temporary nitrogen deprivation on tomato leaf phenolics. Int J Mol Sci 2011; 12:7971-81. [PMID: 22174644 PMCID: PMC3233450 DOI: 10.3390/ijms12117971] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 11/07/2011] [Accepted: 11/08/2011] [Indexed: 11/29/2022] Open
Abstract
Reducing the use of pesticides represents a major challenge of modern agriculture. Plants synthesize secondary metabolites such as polyphenols that participate in the resistance to parasites. The aim of this study was to test: (1) the impact of nitrogen deficiency on tomato (Solanum lycopersicum) leaf composition and more particularly on two phenolic molecules (chlorogenic acid and rutin) as well as on the general plant biomass; and (2) whether this effect continued after a return to normal nitrogen nutrition. Our results showed that plants deprived of nitrogen for 10 or 19 days contained higher levels of chlorogenic acid and rutin than control plants. In addition, this difference persisted when the plants were once again cultivated on a nitrogen-rich medium. These findings offer interesting perspectives on the use of a short period of deprivation to modulate the levels of compounds of interest in a plant.
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Affiliation(s)
- Camille Bénard
- INRA UR 1115 Horticultural Plants and Culture Systems (PSH), Domaine Saint Paul, F-84914 Avignon, France; E-Mail:
| | - Frédéric Bourgaud
- UMR 1121 University of Lorraine (INPL)-INRA Agronomy and Environment Nancy-Colmar, ENSAIA 2, avenue de la forêt de Haye F-54505 Vandoeuvre-lès-Nancy, France; E-Mail:
| | - Hélène Gautier
- INRA UR 1115 Horticultural Plants and Culture Systems (PSH), Domaine Saint Paul, F-84914 Avignon, France; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +334-32-72-23-45; Fax: +334-32-72-22-80
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Di Giovanni S, Eleuteri S, Paleologou KE, Yin G, Zweckstetter M, Carrupt PA, Lashuel HA. Entacapone and tolcapone, two catechol O-methyltransferase inhibitors, block fibril formation of alpha-synuclein and beta-amyloid and protect against amyloid-induced toxicity. J Biol Chem 2010; 285:14941-14954. [PMID: 20150427 DOI: 10.1074/jbc.m109.080390] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Parkinson disease (PD) is the second most common neurodegenerative disorder after Alzheimer disease (AD). There is considerable consensus that the increased production and/or aggregation of alpha-synuclein (alpha-syn) plays a central role in the pathogenesis of PD and related synucleinopathies. Current therapeutic strategies for treating PD offer mainly transient symptomatic relief and aim at the restitution of dopamine levels to counterbalance the loss of dopaminergic neurons. Therefore, the identification and development of drug-like molecules that block alpha-synuclein aggregation and prevent the loss of dopaminergic neurons are desperately needed to treat or slow the progression of PD. Here, we show that entacapone and tolcapone are potent inhibitors of alpha-syn and beta-amyloid (Abeta) oligomerization and fibrillogenesis, and they also protect against extracellular toxicity induced by the aggregation of both proteins. Comparison of the anti-aggregation properties of entacapone and tolcapone with the effect of five other catechol-containing compounds, dopamine, pyrogallol, gallic acid, caffeic acid, and quercetin on the oligomerization and fibrillization of alpha-syn and Abeta, demonstrate that the catechol moiety is essential for the anti-amyloidogenic activity. Our findings present the first characterization of the anti-amyloidogenic properties of tolcapone and entacapone against both alpha-synuclein and Abeta42 and highlight the potential of this class of nitro-catechol compounds as anti-amyloidogenic agents. Their inhibitory properties, mode of action, and structural properties suggest that they constitute promising lead compounds for further optimization.
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Affiliation(s)
- Saviana Di Giovanni
- Laboratory of Molecular Neurobiology and Neuroproteomics, Swiss Federal Institute of Technology Lausanne, SV-BMI-LMNN-AI2351, CH-1015 Lausanne, Switzerland
| | - Simona Eleuteri
- Laboratory of Molecular Neurobiology and Neuroproteomics, Swiss Federal Institute of Technology Lausanne, SV-BMI-LMNN-AI2351, CH-1015 Lausanne, Switzerland; Dipartimento di Biologia Evoluzionistica Sperimentale, Università di Bologna Via Selmi, 3, 40126 Bologna, Italy
| | - Katerina E Paleologou
- Laboratory of Molecular Neurobiology and Neuroproteomics, Swiss Federal Institute of Technology Lausanne, SV-BMI-LMNN-AI2351, CH-1015 Lausanne, Switzerland
| | - Guowei Yin
- Max-Planck Institute for Biophysical Chemistry, NMR-based Structural Biology, Am Fassberg 11, 37077 Goettingen, Germany
| | - Markus Zweckstetter
- Max-Planck Institute for Biophysical Chemistry, NMR-based Structural Biology, Am Fassberg 11, 37077 Goettingen, Germany; Deutsche Forschungsgemeinschaft Research Center for the Molecular Physiology of the Brain, Göttingen, Germany
| | - Pierre-Alain Carrupt
- School of Pharmaceutical Sciences, University of Geneva and University of Lausanne, Quai Ernest-Ansermet 30, CH-1211, Genève 4, Switzerland
| | - Hilal A Lashuel
- Laboratory of Molecular Neurobiology and Neuroproteomics, Swiss Federal Institute of Technology Lausanne, SV-BMI-LMNN-AI2351, CH-1015 Lausanne, Switzerland.
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Heidel-Fischer HM, Freitak D, Janz N, Söderlind L, Vogel H, Nylin S. Phylogenetic relatedness and host plant growth form influence gene expression of the polyphagous comma butterfly (Polygonia c-album). BMC Genomics 2009; 10:506. [PMID: 19878603 PMCID: PMC2775755 DOI: 10.1186/1471-2164-10-506] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Accepted: 10/31/2009] [Indexed: 11/12/2022] Open
Abstract
Background The mechanisms that shape the host plant range of herbivorous insect are to date not well understood but knowledge of these mechanisms and the selective forces that influence them can expand our understanding of the larger ecological interaction. Nevertheless, it is well established that chemical defenses of plants influence the host range of herbivorous insects. While host plant chemistry is influenced by phylogeny, also the growth forms of plants appear to influence the plant defense strategies as first postulated by Feeny (the "plant apparency" hypothesis). In the present study we aim to investigate the molecular basis of the diverse host plant range of the comma butterfly (Polygonia c-album) by testing differential gene expression in the caterpillars on three host plants that are either closely related or share the same growth form. Results In total 120 genes were identified to be differentially expressed in P. c-album after feeding on different host plants, 55 of them in the midgut and 65 in the restbody of the caterpillars. Expression patterns could be confirmed with an independent method for 14 of 27 tested genes. Pairwise similarities in upregulation in the midgut of the caterpillars were higher between plants that shared either growth form or were phylogenetically related. No known detoxifying enzymes were found to be differently regulated in the midgut after feeding on different host plants. Conclusion Our data suggest a complex picture of gene expression in response to host plant feeding. While each plant requires a unique gene regulation in the caterpillar, both phylogenetic relatedness and host plant growth form appear to influence the expression profile of the polyphagous comma butterfly, in agreement with phylogenetic studies of host plant utilization in butterflies.
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Affiliation(s)
- Hanna M Heidel-Fischer
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Strasse 8, D-07745 Jena, Germany.
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Shutava TG, Balkundi SS, Vangala P, Steffan JJ, Bigelow RL, Cardelli JA, O'Neal DP, Lvov YM. Layer-by-Layer-Coated Gelatin Nanoparticles as a Vehicle for Delivery of Natural Polyphenols. ACS NANO 2009; 3:1877-85. [PMID: 19534472 DOI: 10.1021/nn900451a] [Citation(s) in RCA: 298] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Natural polyphenols with previously demonstrated anticancer potential, epigallocatechin gallate (EGCG), tannic acid, curcumin, and theaflavin, were encased into gelatin-based 200 nm nanoparticles consisting of a soft gel-like interior with or without a surrounding LbL shell of polyelectrolytes (polystyrene sulfonate/polyallylamine hydrochloride, polyglutamic acid/poly-l-lysine, dextran sulfate/protamine sulfate, carboxymethyl cellulose/gelatin, type A) assembled using the layer-by-layer technique. The characteristics of polyphenol loading and factors affecting their release from the nanocapsules were investigated. Nanoparticle-encapsulated EGCG retained its biological activity and blocked hepatocyte growth factor (HGF)-induced intracellular signaling in the breast cancer cell line MBA-MD-231 as potently as free EGCG.
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Affiliation(s)
- Tatsiana G Shutava
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, Ruston, Louisiana 71272
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Shutava TG, Balkundi SS, Lvov YM. (-)-Epigallocatechin gallate/gelatin layer-by-layer assembled films and microcapsules. J Colloid Interface Sci 2008; 330:276-83. [PMID: 19027120 DOI: 10.1016/j.jcis.2008.10.082] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2008] [Revised: 10/28/2008] [Accepted: 10/31/2008] [Indexed: 11/26/2022]
Abstract
A new type of protein/polyphenol microcapsules on the basis of naturally occurring polyphenol (-)-epigallocatechin gallate (EGCG) and gelatin, type A, was obtained using the layer-by-layer (LbL) assembly method. The microcapsules show a more pronounced dependence of permeability on molecular weight of permeating substances than commonly used polyallylamine/polystyrene sulfonate capsules. The regularities of EGCG adsorption in alternation with type A and B gelatins have been investigated using quartz crystal microbalance and electrophoretic mobility measurements on microparticles and found to be dependent on gelatin properties. EGCG in the LbL assemblies retains its antioxidant activity. The kinetics of the reaction of 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) cation-radicals with films consisting of 1-10 gelatin/EGCG bilayers is affected by film structure. The EGCG content in the protein/polyphenol film material is as high as 30% w/w. Encapsulation of EGCG via its alternated adsorption with gelatins can be a perspective way to new formulations containing the polyphenol for drug delivery applications.
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Affiliation(s)
- Tatsiana G Shutava
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, LA 71272, USA.
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Magalhães STV, Guedes RNC, Demuner AJ, Lima ER. Effect of coffee alkaloids and phenolics on egg-laying by the coffee leaf miner Leucoptera coffeella. BULLETIN OF ENTOMOLOGICAL RESEARCH 2008; 98:483-489. [PMID: 18826664 DOI: 10.1017/s0007485308005804] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The recognized importance of coffee alkaloids and phenolics mediating insect-plant interactions led to the present investigation aiming to test the hypothesis that the phenolics chlorogenic and caffeic acids and the alkaloid caffeine and some of its derivatives present in coffee leaves affect egg-laying by the coffee leaf miner Leucoptera (=Perileucoptera) coffeella (Guérin-Méneville & Perrottet) (Lepidoptera: Lyonetiidae), one of the main coffee pests in the Neotropical region. These phytochemicals were, therefore, quantified in leaves from 12 coffee genotypes and their effect on the egg-laying preference by the coffee leaf miner was assessed. Canonical variate analysis and partial canonical correlation provided evidence that increased leaf levels of caffeine favour egg-laying by the coffee leaf miner. An egg-laying preference bioassay was, therefore, carried out to specifically test this hypothesis using increasing caffeine concentrations sprayed on leaves of one of the coffee genotypes with the lowest level of this compound (i.e. Hybrid UFV 557-04 generated from a cross between Coffea racemosa Lour. and C. arabica L.). The results obtained allowed the recognition of a significant concentration-response relationship, providing support for the hypothesis that caffeine stimulates egg-laying by the coffee leaf miner in coffee leaves.
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Affiliation(s)
- S T V Magalhães
- Departamento de Biologia Animal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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12
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A test of the latitudinal defense hypothesis: herbivory, tannins and total phenolics in four North American tree species. Ecol Res 2008. [DOI: 10.1007/s11284-008-0541-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Lin JY, Tang CY. Strawberry, loquat, mulberry, and bitter melon juices exhibit prophylactic effects on LPS-induced inflammation using murine peritoneal macrophages. Food Chem 2008. [DOI: 10.1016/j.foodchem.2007.10.025] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Gross EM, Brune A, Walenciak O. Gut pH, redox conditions and oxygen levels in an aquatic caterpillar: potential effects on the fate of ingested tannins. JOURNAL OF INSECT PHYSIOLOGY 2008; 54:462-471. [PMID: 18171578 DOI: 10.1016/j.jinsphys.2007.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 11/19/2007] [Accepted: 11/21/2007] [Indexed: 05/25/2023]
Abstract
Larvae of the freshwater moth Acentria ephemerella (Pyralidae, Lepidoptera) can fully develop on Myriophyllum spicatum, a submerged macrophyte containing 7-10% of its dry mass as tannins. We investigated the physicochemical gut parameters of larvae fed with M. spicatum or Potamogeton perfoliatus, a food plant lacking tannins, and the chemical fate of ingested polyphenols. Microelectrode studies revealed that larval midguts were slightly alkaline (pH 8) and had a positive redox potential. Whole guts were oxygen sinks owing to the oxygen demand of the gut contents. Oxygen penetrated the midgut up to 100 microm, but the centres of the foregut and midgut were always anoxic. The physicochemical parameters of the guts did not change with the food plant. The major tannin from M. spicatum, tellimagrandin II, was significantly depleted in the midgut and was not detected in faeces. In vitro studies indicated that tellimagrandin II is rapidly depleted mainly through oxidation, and hydrolysis might also occur. Our findings for A. ephemerella are compared with those for terrestrial Lepidoptera, and possible mechanisms for adaptations to tannin-rich food plants are discussed.
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Affiliation(s)
- Elisabeth M Gross
- Limnological Institute, Biology Department, University of Konstanz, Konstanz, Germany.
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Foggo A, Higgins S, Wargent JJ, Coleman RA. Tri-trophic consequences of UV-B exposure: plants, herbivores and parasitoids. Oecologia 2007; 154:505-12. [PMID: 17891418 DOI: 10.1007/s00442-007-0857-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2006] [Accepted: 08/29/2007] [Indexed: 10/22/2022]
Abstract
In this paper we demonstrate a UV-B-mediated link between host plants, herbivores and their parasitoids, using a model system consisting of a host plant Brassica oleracea, a herbivore Plutella xylostella and its parasitoid Cotesia plutellae. Ultraviolet-B radiation (UV-B) is a potent elicitor of a variety of changes in the chemistry, morphology and physiology of plants and animals. Recent studies have demonstrated that common signals, such as jasmonic acid (JA), play important roles in the mechanisms by which plants respond to UV-B and to damage by herbivores. Plant responses elicited by UV-B radiation can affect the choices of ovipositing female insects and the fitness of their offspring. This leads to the prediction that, in plants, the changes induced as a consequence of UV damage will be similar to those elicited in response to insect damage, including knock-on effects upon the next trophic level, predators. In our trials female P. xylostella oviposited preferentially on host plants grown in depleted UV-B conditions, while their larvae preferred to feed on tissues from UV-depleted regimes over those from UV-supplemented ones. Larval feeding patterns on UV-supplemented tissues met the predictions of models which propose that induced defences in plants should disperse herbivory; feeding scars were significantly smaller and more numerous--though not significantly so--than those on host plant leaves grown in UV-depleted conditions. Most importantly, female parasitoids also showed a clear pattern of preference when given the choice between host plants and attendant larvae from the different UV regimes; however, in the case of the female parasitoids, the choice was in favour of potential hosts foraging on UV-supplemented tissues. This study demonstrates the potential for UV-B to elicit a variety of interactions between trophic levels, most likely mediated through effects upon host plant chemistry.
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Affiliation(s)
- Andrew Foggo
- Marine Biology and Ecology Research Centre, School of Biological Sciences, University of Plymouth, Davy 617, Drake Circus, Plymouth PL4 8AA, UK.
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Shutova TG, Agabekov VE, Lvov YM. Reaction of radical cations with multilayers of tannic acid and polyelectrolytes. RUSS J GEN CHEM+ 2007. [DOI: 10.1134/s1070363207090034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shutava TG, Prouty MD, Agabekov VE, Lvov YM. Antioxidant Properties of Layer-by-Layer films on the Basis of Tannic Acid. CHEM LETT 2006. [DOI: 10.1246/cl.2006.1144] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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