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[PMID]:29373588
[Au] Autor:Muszynski S; Tomaszewska E; Kwiecien M; Dobrowolski P; Tomczyk-Warunek A
[Ad] Endereço:Department of Physics, Faculty of Production Engineering, University of Life Sciences in Lublin, Lublin, Poland.
[Ti] Título:Subsequent somatic axis and bone tissue metabolism responses to a low-zinc diet with or without phytase inclusion in broiler chickens.
[So] Source:PLoS One;13(1):e0191964, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Zinc is required for normal bone development and cartilage formation. The purpose of this study was to assess the effect of with adding organic Zn (alone or phytase inclusion) at the reduced dose to growing male Ross 308 chickens on somatic axis and bone tissue metabolism. 200 one-day old broilers were divided into the negative control group fed diet without Zn or phytase inclusion, positive control group receiving Zn in the 100% of daily recommended dose from ZnO, and two experimental groups fed diet introduced Zn in 25% of daily recommendation as a glycine chelate (Zn-Gly) with or without phytase inclusion (500 FTU·kg-1). Supplemental organic Zn increased bone Zn and Mg content, serum IGF-1, growth hormone and leptin concentration. Additional phytase inclusion increased body weight gain, blood plasma Ca, Fe, Zn and osteocalcin concentration and tibia ash percentage when compared to the Zn-deprived control. Bone geometry, yield and ultimate strengths were enhanced in both organic Zn supplemented groups, and the overall mechanical strength parameters of bone were better in these groups than in the positive control group supplemented with standard dose of inorganic Zn. Also marked improvements in the thickness of articular and the growth plate cartilages as well as real bone volume and thickness of metaphyseal trabeculae were achieved in all broilers fed Zn-supplemented diet irrespective of phytase inclusion, however, the highest cancellous bone mass and the best trabecular structure were noted after ZnO supplementation. In concludion, although dietary organic Zn given to growing broilers in 25% of daily recommended dose improved general bone properties and mechanical strength, the obtained results do not allow to unambiguously state that organic Zn supplementation at this level, even after phytase inclusion, is sufficient for proper bone development.
[Mh] Termos MeSH primário: 6-Fitase/metabolismo
Osso e Ossos/metabolismo
Zinco/administração & dosagem
[Mh] Termos MeSH secundário: Animais
Galinhas
Hormônio do Crescimento/metabolismo
Fator de Crescimento Insulin-Like I/metabolismo
Leptina/metabolismo
Magnésio/metabolismo
Masculino
Zinco/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Leptin); 67763-96-6 (Insulin-Like Growth Factor I); 9002-72-6 (Growth Hormone); EC 3.1.3.26 (6-Phytase); I38ZP9992A (Magnesium); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180127
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191964


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[PMID]:29339152
[Au] Autor:Gulshan MA; Rahman MM; Matsumura S; Higuchi T; Umezawa N; Ikawa Y
[Ad] Endereço:Department of Chemistry, Graduate School of Science and Engineering, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan; Graduate School of Innovative Life Science, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan.
[Ti] Título:Biogenic triamine and tetraamine activate core catalytic ability of Tetrahymena group I ribozyme in the absence of its large activator module.
[So] Source:Biochem Biophys Res Commun;496(2):594-600, 2018 02 05.
[Is] ISSN:1090-2104
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Group I intron ribozymes share common core elements that form a three-dimensional structure responsible for their catalytic activity. This core structure is unstable without assistance from additional factors that stabilize its tertiary structure. We examined biogenic triamine and tetraamine and also their fragments for their abilities to stabilize a structurally unstable group I ribozyme, ΔP5 ribozyme, derived from the Tetrahymena group I intron ribozyme by deleting its large activator module. Biogenic triamine (spermidine) and tetraamine (spermine) efficiently activated the ΔP5 ribozyme under conditions where the ribozyme was virtually inactive. These observations suggested that polyamines are promising small molecule modulators to activate and possibly inhibit the core catalytic ability of group I ribozymes.
[Mh] Termos MeSH primário: Poliaminas/metabolismo
RNA Catalítico/metabolismo
Tetrahymena/enzimologia
[Mh] Termos MeSH secundário: Sequência de Bases
Domínio Catalítico
Cinética
Magnésio/metabolismo
Conformação de Ácido Nucleico
RNA Catalítico/química
Espermidina/metabolismo
Tetrahymena/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (GIR1 ribozyme); 0 (Polyamines); 0 (RNA, Catalytic); I38ZP9992A (Magnesium); U87FK77H25 (Spermidine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE


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[PMID]:29267507
[Au] Autor:Liu N; Ding D; Wang L; Zhao H; Zhu L; Geng X
[Ad] Endereço:Department of Critical Care Medicine, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
[Ti] Título:Two novel Mg(II)-based and Zn(II)-based complexes: inhibiting growth of human liver cancer cells.
[So] Source:Braz J Med Biol Res;51(2):e6929, 2017 Dec 18.
[Is] ISSN:1414-431X
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:Two new Mg(II)-based and Zn(II)-based coordination polymers, {[Mg3(BTB)(DMA)4](DMA)2}n (1, H3BTB=1,3,5-benzenetrisbenzoic acid, DMA=N,N-dimethylacetamide) and {(H2NMe2)2[Zn3(BTB)2(OH)(Im)](DMF)9(MeOH)7}n (2, Im=imidazole, DMF=N,N-dimethylformamide), have been successfully synthesized and structurally characterized under solvothermal conditions. 1 contains a linear [Mg3(COO)6] cluster that connected by the fully deprotonated BTB3- ligands to give a kgd-type 2D bilayer structure; 2 represents a microporous 3D pillar-layered system based on the binuclear Zn units and pillared Im ligands, which shows a (3,5)-connected hms topological net. In addition, in vitro anticancer activities of compounds 1 and 2 on 4 human liver cancer cells (HB611, HHCC, BEL-7405 and SMMC-7721) were determined.
[Mh] Termos MeSH primário: Antineoplásicos/farmacologia
Benzimidazóis/farmacologia
Neoplasias Hepáticas/tratamento farmacológico
Estruturas Metalorgânicas/farmacologia
[Mh] Termos MeSH secundário: Antineoplásicos/síntese química
Benzimidazóis/síntese química
Linhagem Celular Tumoral
Seres Humanos
Ligantes
Neoplasias Hepáticas/patologia
Magnésio/química
Estruturas Metalorgânicas/síntese química
Estrutura Molecular
Zinco/química
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antineoplastic Agents); 0 (Benzimidazoles); 0 (Ligands); 0 (Metal-Organic Frameworks); I38ZP9992A (Magnesium); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE


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[PMID]:28985538
[Au] Autor:Chillè D; Foti C; Giuffrè O
[Ad] Endereço:Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, 98166 Messina, Italy.
[Ti] Título:Thermodynamic parameters for the protonation and the interaction of arsenate with Mg , Ca and Sr : Application to natural waters.
[So] Source:Chemosphere;190:72-79, 2018 Jan.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Thermodynamic parameters for the protonation of AsO and for the interaction with Mg , Ca and Sr were reported, comprehensive also of their dependence on ionic strength, considering the 0.1 ≤ I ≤ 1 M range and using NaCl as background salt. The same speciation models were obtained for Mg , Ca and Sr systems, with the formation of three different species: ML, MLH and MLH (L = AsO ). Mono- and di-protonated species were very weak, with formation constant values (log K) ranging from 1.45 to 3.23. In order to have a complete picture of thermodynamic properties of the systems under study and to fill the shortage of thermodynamic data on arsenate complex systems, the ligand protonation and metal complex enthalpies were also determined by calorimetric titrations, at t = 25 °C and in NaCl at I = 0.7 M (for H -AsO species also at I = 0.1 M). On the light of the proposed speciation models, examples of As(V) distribution in some natural waters are reported.
[Mh] Termos MeSH primário: Arseniatos/química
Concentração Osmolar
Termodinâmica
Água/química
[Mh] Termos MeSH secundário: Cálcio/química
Calorimetria
Ligantes
Magnésio/química
Cloreto de Sódio/química
Estrôncio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arsenates); 0 (Ligands); 059QF0KO0R (Water); 451W47IQ8X (Sodium Chloride); I38ZP9992A (Magnesium); SY7Q814VUP (Calcium); YZS2RPE8LE (Strontium)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171007
[St] Status:MEDLINE


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[PMID]:29340380
[Au] Autor:Fang Z; Wang J; Zhu S; Yang X; Jia Y; Sun Q; Guan S
[Ad] Endereço:School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China. skguan@zzu.edu.cn.
[Ti] Título:A DFT study of the adsorption of short peptides on Mg and Mg-based alloy surfaces.
[So] Source:Phys Chem Chem Phys;20(5):3602-3607, 2018 Jan 31.
[Is] ISSN:1463-9084
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Adsorption of short peptides, including three dipeptides: arginine-glycine (Arg-Gly), glycine-aspartic acid (Gly-Asp), arginine-aspartic acid (Arg-Asp), and one tripeptide arginine-glycine-aspartic acid (RGD), on the surfaces of Mg and Mg alloys (Mg-Zn, Mg-Y, and Mg-Nd), was studied using the first-principles calculations based on density functional theory (DFT), considering van der Waals (vdW) correction. The calculated adsorption energies (E ) of short peptides on the clean Mg(0001) surface are in the range of -1.73 to -2.80 eV per dipeptide, and -3.24 eV for RGD. The short peptides prefer to bond to Mg atoms at the surface by the O and N anions in their functional groups. For the clean Mg(0001) surface, the E of the short peptides are exclusively dominated by the number of functional groups binding to the surface. However, for the surface of the Mg-Zn alloy (1% Zn), the adsorption of the peptides is clearly enhanced (by about 0.3 eV per peptide) due to the enhanced N-Mg bond and the electrostatic interactions between the doped Zn at the surface and the backbone chains of the peptides. Furthermore, the attractive interactions are increased with the increase of doped Zn contents (up to 3%). In contrast, for the surfaces of Mg-Y (1% Y) and Mg-Nd (1% Nd) alloys, the adsorption of the peptides is slightly weakened compared to that on the clean Mg(0001) surfaces. Our results provide useful guidance in understanding the interactions between peptides and the Mg-based biomedical alloy surfaces at the atomic scale in the biomimetic coating fields.
[Mh] Termos MeSH primário: Ligas/química
Dipeptídeos/química
Magnésio/química
Oligopeptídeos/química
[Mh] Termos MeSH secundário: Adsorção
Dipeptídeos/metabolismo
Oligopeptídeos/metabolismo
Teoria Quântica
Eletricidade Estática
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alloys); 0 (Dipeptides); 0 (Oligopeptides); 78VO7F77PN (arginyl-glycyl-aspartic acid); I38ZP9992A (Magnesium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE
[do] DOI:10.1039/c7cp07431j


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[PMID]:29311462
[Au] Autor:Takagi A
[Ad] Endereço:Graduate School of Pharmaceutical Sciences, Osaka University.
[Ti] Título:[Development of Efficient Methods for Benzyne Generation].
[So] Source:Yakugaku Zasshi;138(1):27-35, 2018.
[Is] ISSN:1347-5231
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo:2-[(Neopentyl glycolato)boryl]phenyl triflates, readily synthesized from 2-iodophenol derivatives via halogen-magnesium exchange or Miyaura borylation, were developed as new benzyne precursors. Benzynes were generated under fluoride-ion-mediated conditions and reacted immediately with various arynophiles. Herein, we describe the generation of benzynes having reactive functional groups, such as methoxycarbonyl, acetyl, bromo, and amino groups, as well as their [4+2], (3+2), and [2+2] cycloaddition reactions which produce corresponding benzo-fused compounds.
[Mh] Termos MeSH primário: Derivados de Benzeno/síntese química
Química Orgânica/métodos
[Mh] Termos MeSH secundário: Reação de Cicloadição
Fluoretos
Halogênios/química
Iodobenzenos/química
Íons
Magnésio/química
Fenômenos de Química Orgânica
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Benzene Derivatives); 0 (Halogens); 0 (Iodobenzenes); 0 (Ions); 0 (benzyne); F27L34A8B9 (2-iodophenol); I38ZP9992A (Magnesium); Q80VPU408O (Fluorides)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180110
[St] Status:MEDLINE
[do] DOI:10.1248/yakushi.17-00157


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[PMID]:29199984
[Au] Autor:Law A; Stergioulis A; Halavaty AS; Minasov G; Anderson WF; Kuhn ML
[Ad] Endereço:Department of Chemistry and Biochemistry, San Francisco State University, USA.
[Ti] Título:Structure of the Bacillus anthracis dTDP-L-rhamnose-biosynthetic enzyme dTDP-4-dehydrorhamnose reductase (RfbD).
[So] Source:Acta Crystallogr F Struct Biol Commun;73(Pt 12):644-650, 2017 Dec 01.
[Is] ISSN:2053-230X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Bacillus anthracis is the causative agent of the deadly disease Anthrax. Its use in bioterrorism and its ability to re-emerge have brought renewed interest in this organism. B. anthracis is a Gram-positive bacterium that adds L-rhamnose to its cell-wall polysaccharides using the activated donor dTDP-ß-L-rhamnose. The enzymes involved in the biosynthesis of the activated donor are absent in humans, which make them ideal targets for therapeutic development to combat pathogens. Here, the 2.65 Šresolution crystal structure of the fourth enzyme in the dTDP-ß-L-rhamnose-biosynthetic pathway from B. anthracis, dTDP-4-dehydro-ß-L-rhamnose reductase (RfbD), is presented in complex with NADP . This enzyme catalyzes the reduction of dTDP-4-dehydro-ß-L-rhamnose to dTDP-ß-L-rhamnose. Although the protein was co-crystallized in the presence of Mg , the protein lacks the conserved residues that coordinate Mg .
[Mh] Termos MeSH primário: Bacillus anthracis/enzimologia
Proteínas de Bactérias/química
Desidrogenases de Carboidrato/química
Desidrogenases de Carboidrato/metabolismo
[Mh] Termos MeSH secundário: Proteínas de Bactérias/genética
Proteínas de Bactérias/metabolismo
Desidrogenases de Carboidrato/genética
Cristalografia por Raios X
Magnésio/metabolismo
Modelos Moleculares
NADP/química
NADP/metabolismo
Açúcares de Nucleosídeo Difosfato/metabolismo
Conformação Proteica
Multimerização Proteica
Homologia Estrutural de Proteína
Especificidade por Substrato
Nucleotídeos de Timina/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Nucleoside Diphosphate Sugars); 0 (Thymine Nucleotides); 2147-59-3 (thymidine diphosphate rhamnose); 53-59-8 (NADP); EC 1.1.- (Carbohydrate Dehydrogenases); EC 1.1.1.133 (dTDP-4-dehydrorhamnose reductase); I38ZP9992A (Magnesium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171205
[St] Status:MEDLINE
[do] DOI:10.1107/S2053230X17015746


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[PMID]:27775153
[Au] Autor:Liu M; Liu XX; He XL; Liu LJ; Wu H; Tang CX; Zhang YS; Jin CW
[Ad] Endereço:Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
[Ti] Título:Ethylene and nitric oxide interact to regulate the magnesium deficiency-induced root hair development in Arabidopsis.
[So] Source:New Phytol;213(3):1242-1256, 2017 Feb.
[Is] ISSN:1469-8137
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Nitric oxide (NO) and ethylene respond to biotic and abiotic stresses through either similar or independent processes. This study examines the mechanism underlying the effects of NO and ethylene on promoting root hair development in Arabidopsis under magnesium (Mg) deficiency. The interaction between NO and ethylene in the regulation of Mg deficiency-induced root hair development was investigated using NO- and ethylene-related mutants and pharmacological methods. Mg deficiency triggered a burst of NO and ethylene, accompanied by a stimulated development of root hairs. Interestingly, ethylene facilitated NO generation by activation of both nitrate reductase and nitric oxide synthase-like (NOS-L) in the roots of Mg-deficient plants. In turn, NO enhanced ethylene synthesis through stimulating the activities of 1-aminocyclopropane-1-carboxylate (ACC) oxidase and ACC synthase (ACS). These two processes constituted an NO-ethylene feedback loop. Blocking either of these two processes inhibited the stimulation of root hair development under Mg deficiency. In conclusion, we suggest that Mg deficiency increases the production of NO and ethylene in roots, each influencing the accumulation and role of the other, and thus these two signals interactively regulate Mg deficiency-induced root hair morphogenesis.
[Mh] Termos MeSH primário: Arabidopsis/crescimento & desenvolvimento
Arabidopsis/metabolismo
Etilenos/metabolismo
Magnésio/metabolismo
Óxido Nítrico/metabolismo
Raízes de Plantas/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Modelos Biológicos
Óxido Nítrico/biossíntese
Transdução de Sinais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ethylenes); 31C4KY9ESH (Nitric Oxide); 91GW059KN7 (ethylene); I38ZP9992A (Magnesium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE
[do] DOI:10.1111/nph.14259


  9 / 61439 MEDLINE  
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[PMID]:29293586
[Au] Autor:Kawakami H; Mihara T; Nakamura N; Ka K; Goto T
[Ad] Endereço:Department of Anesthesiology, Kanagawa Children's Medical Center, Yokohama, Kanagawa, Japan.
[Ti] Título:Effect of magnesium added to local anesthetics for caudal anesthesia on postoperative pain in pediatric surgical patients: A systematic review and meta-analysis with Trial Sequential Analysis.
[So] Source:PLoS One;13(1):e0190354, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Magnesium has been investigated as an adjuvant for neuraxial anesthesia, but the effect of caudal magnesium on postoperative pain is inconsistent. The aim of this systematic review and meta-analysis was to evaluate the analgesic effect of caudal magnesium. METHODS: We searched six databases, including trial registration sites. Randomized clinical trials reporting the effect of caudal magnesium on postoperative pain after general anesthesia were eligible. The risk ratio for use of rescue analgesics after surgery was combined using a random-effects model. We also assessed adverse events. The I2 statistic was used to assess heterogeneity. We assessed risk of bias with Cochrane domains. We controlled type I and II errors due to sparse data and repetitive testing with Trial Sequential Analysis. We assessed the quality of evidence with GRADE. RESULTS: Four randomized controlled trials (247 patients) evaluated the need for rescue analgesics. In all four trials, 50 mg of magnesium was administered with caudal ropivacaine. The results suggested that the need for rescue analgesia was reduced significantly by caudal magnesium administration (risk ratio 0.45; 95% confidence interval 0.24-0.86). There was considerable heterogeneity as indicated by an I2 value of 62.5%. The Trial Sequential Analysis-adjusted confidence interval was 0.04-5.55, indicating that further trials are required. The quality of evidence was very low. The rate of adverse events was comparable between treatment groups. CONCLUSION: Caudal magnesium may reduce the need for rescue analgesia after surgery, but further randomized clinical trials with a low risk of bias and a low risk of random errors are necessary to assess the effect of caudal magnesium on postoperative pain and adverse events. TRIAL REGISTRATION: University Hospital Medical Information Network Clinical Trials Registry UMIN000025344.
[Mh] Termos MeSH primário: Anestesia Caudal/métodos
Anestésicos Locais/administração & dosagem
Magnésio/administração & dosagem
Dor Pós-Operatória/tratamento farmacológico
[Mh] Termos MeSH secundário: Criança
Pré-Escolar
Seres Humanos
Lactente
Ensaios Clínicos Controlados Aleatórios como Assunto
Procedimentos Cirúrgicos Operatórios/efeitos adversos
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; RESEARCH SUPPORT, NON-U.S. GOV'T; REVIEW
[Nm] Nome de substância:
0 (Anesthetics, Local); I38ZP9992A (Magnesium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180103
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190354


  10 / 61439 MEDLINE  
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[PMID]:29304104
[Au] Autor:Uyi OO; Zachariades C; Heshula LU; Hill MP
[Ad] Endereço:Department of Zoology and Entomology, University of Fort Hare, Alice, South Africa.
[Ti] Título:Developmental and reproductive performance of a specialist herbivore depend on seasonality of, and light conditions experienced by, the host plant.
[So] Source:PLoS One;13(1):e0190700, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Host plant phenology (as influenced by seasonality) and light-mediated changes in the phenotypic and phytochemical properties of leaves have been hypothesised to equivocally influence insect herbivore performance. Here, we examined the effects of seasonality, through host plant phenology (late growth-season = autumn vs flowering-season = winter) and light environment (shade vs full-sun habitat) on the leaf characteristics of the invasive alien plant, Chromolaena odorata. In addition, the performance of a specialist folivore, Pareuchaetes insulata, feeding on leaves obtained from both shaded and full-sun habitats during autumn and winter, was evaluated over two generations. Foliar nitrogen and magnesium contents were generally higher in shaded plants with much higher levels during winter. Leaf water content was higher in shaded and in autumn plants. Total non-structural carbohydrate (TNC) and phosphorus contents did not differ as a function of season, but were higher in shaded foliage compared to full-sun leaves. Leaf toughness was noticeably higher on plants growing in full-sun during winter. With the exception of shaded leaves in autumn that supported the best performance [fastest development, heaviest pupal mass, and highest growth rate and Host Suitability Index (HSI) score], full-sun foliage in autumn surprisingly also supported an improved performance of the moth compared to shaded or full-sun leaves in winter. Our findings suggest that shaded and autumn foliage are nutritionally more suitable for the growth and reproduction of P. insulata. However, the heavier pupal mass, increased number of eggs and higher HSI score in individuals that fed on full-sun foliage in autumn compared to their counterparts that fed on shaded or full-sun foliage in winter suggest that full-sun foliage during autumn is also a suitable food source for larvae of the moth. In sum, our study demonstrates that seasonal and light-modulated changes in leaf characteristics can affect insect folivore performance in ways that are not linear.
[Mh] Termos MeSH primário: Chromolaena/fisiologia
Herbivoria
Mariposas/fisiologia
Estações do Ano
Luz Solar
[Mh] Termos MeSH secundário: Animais
Biomassa
Chromolaena/efeitos da radiação
Comportamento Alimentar
Feminino
Espécies Introduzidas
Magnésio/metabolismo
Masculino
Nitrogênio/metabolismo
Folhas de Planta/fisiologia
Reprodução/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
I38ZP9992A (Magnesium); N762921K75 (Nitrogen)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180210
[Lr] Data última revisão:
180210
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180106
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190700



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