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Pesquisa : B01.050.500.131.365.190.615 [Categoria DeCS]
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  1 / 909 MEDLINE  
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[PMID]:28465179
[Au] Autor:Mullaivanam Ramasamy S; Denis M; Sivakumar S; Munusamy A
[Ad] Endereço:Laboratory of Pathobiology, Department of Zoology, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India. Electronic address: sivakumarmr1981@gmail.com.
[Ti] Título:Phenoloxidase activity in humoral plasma, hemocyanin and hemocyanin separated proteins of the giant freshwater prawn Macrobrachium rosenbergii.
[So] Source:Int J Biol Macromol;102:977-985, 2017 Sep.
[Is] ISSN:1879-0003
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Hemocyanin is a copper containing protein and its role in the immune function of phenoloxidase (PO) activity was investigated in the giant freshwater prawn Macrobrachium rosenbergii. Hemocyanin, sedimented by ultracentrifugation from the plasma appeared on polyacrylamide gel electrophoresis (PAGE 7%) on Coomassie Brilliant Blue and bathocuproine sulfonic acid stain as four copper containing proteins of molecular masses 50, 60, 114 and 325kDa. Accordingly, on diethylaminoethyl-cellulose anion exchange column hemocyanin separated into four proteins designated as MrHc1, MrHc2, MrHc3 and MrHc4 with electrophoretically (PAGE) determined molecular masses of 60, 114, 50 and 325kDa respectively. The reduction of proteins in sodium dodecyl sulphate (SDS)-PAGE revealed that MrHc1 and 3 were monomeric for 60and 50kDa respectively, MrHc2 dimeric of 56 and 58kDa subunits and MrHc4 appeared with three subunits of 74, 76 and 78kDa. The PO activity was determined in plasma, hemocyanin and the four separated hemocyanin proteins in vitro using L-3,4-dihydroxyphenylalanine (L-DOPA) at pH7.5, 25°C and appeared elicited by exogenous activators such as trypsin, SDS, cell wall components of bacteria and polysaccharide laminarin. This study clearly demonstrated hemocyanin as the major copper containing protein in the plasma of M. rosenbergii with potent PO activity.
[Mh] Termos MeSH primário: Hemocianinas/metabolismo
Imunidade Humoral
Monofenol Mono-Oxigenase/sangue
Monofenol Mono-Oxigenase/metabolismo
Palaemonidae/enzimologia
[Mh] Termos MeSH secundário: Animais
Palaemonidae/imunologia
Palaemonidae/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
9013-72-3 (Hemocyanins); EC 1.14.18.1 (Monophenol Monooxygenase)
[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:170504
[St] Status:MEDLINE


  2 / 909 MEDLINE  
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[PMID]:28595450
[Au] Autor:Jiang W; Zhou W; Othman R; Uchida H; Watanabe R; Suzuki T; Sakamoto B; Nagai H
[Ad] Endereço:a Department of Ocean Sciences , Tokyo University of Marine Science and Technology , Tokyo , Japan.
[Ti] Título:A new malyngamide from the marine cyanobacterium Moorea producens.
[So] Source:Nat Prod Res;32(1):97-104, 2018 Jan.
[Is] ISSN:1478-6427
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A new malyngamide (1) was isolated along with seven known compounds (2-8) from the marine cyanobacterium Moorea producens collected in Hawaii. Compound 1 represented the first reported malyngamide with a hydroxy moiety at C-7 of the characteristic fatty acid portion of the compound. Compound 1 showed cytotoxicity against L1210 cell line at an IC value of 2.9 mM and lethal toxicity against the shrimp Palaemon paucidens at a LD value of 33.3 mg/kg. The bioactivity of compound 1 was approximately 10-100 times weaker than those of isomalyngamides A and B (3, 4). These results indicated that the methoxy group at C-7 of the fatty acid section confers a degree of bioactivity in malyngamides.
[Mh] Termos MeSH primário: Cianobactérias/química
Lipopeptídeos/química
Lipopeptídeos/farmacologia
[Mh] Termos MeSH secundário: Amidas/química
Amidas/farmacologia
Animais
Organismos Aquáticos/química
Linhagem Celular Tumoral
Leucemia L1210
Espectroscopia de Ressonância Magnética
Camundongos
Estrutura Molecular
Palaemonidae/efeitos dos fármacos
Pirróis/química
Pirróis/farmacologia
Relação Estrutura-Atividade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amides); 0 (Lipopeptides); 0 (Pyrroles); 0 (isomalyngamide A); 0 (isomalyngamide B)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170610
[St] Status:MEDLINE
[do] DOI:10.1080/14786419.2017.1338282


  3 / 909 MEDLINE  
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[PMID]:29339067
[Au] Autor:Sun Y; Zhang J; Xiang J
[Ad] Endereço:College of Life Sciences, Hebei University, Baoding, Hebei 071002, China; College of Marine Life and Fisheries, Huaihai Institute of Technology, 59 Cangwu Road, Lianyungang 222005, China.
[Ti] Título:Molecular characterization and function of ß-N-acetylglucosaminidase from ridgetail white prawn Exopalaemon carinicauda.
[So] Source:Gene;648:12-20, 2018 Mar 30.
[Is] ISSN:1879-0038
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Chitin degradation is catalyzed by a two-component chitinolytic enzyme system, chitinase and ß-N-acetylglucosaminidase (NAGase). In this paper, the full-length cDNA sequence encoding NAGase (EcNAG) was obtained from Exopalaemon carinicauda. The deduced amino acid sequence of EcNAG open reading frame (ORF) contained one Glycohydro_20b2 domain and one Glyco_hydro_20 domain. Based on the cDNA sequence, the genomic structure of EcNAG was characterized and it was composed of six exons and five introns. EcNAG mRNA majorly expressed in the hepatopancreas and epidermis. During the molting stages, EcNAG mRNA expression was well-regulated and its expression reached the highest level at the molting stage E. In addition, EcNAG was recombinant expressed in Pichia pastoris and the partial enzymatic characterization of recombinant EcNAG was confirmed. After being challenged with Vibrio parahaemolyticus and Aeromonas hydrophila, the expression of EcNAG was up-regulated significantly at 6 h and reached the peak at 12 h. And then, the expression began to down-regulated and came to the normal level at 72 h. It is helpful to research the relationship between the molt-related hormones and chitinlytic enzymes.
[Mh] Termos MeSH primário: Acetilglucosaminidase/genética
Proteínas de Artrópodes/genética
Muda/genética
Palaemonidae/genética
[Mh] Termos MeSH secundário: Acetilglucosaminidase/classificação
Acetilglucosaminidase/metabolismo
Aeromonas hydrophila/fisiologia
Sequência de Aminoácidos
Animais
Proteínas de Artrópodes/classificação
Proteínas de Artrópodes/metabolismo
Sequência de Bases
Epiderme/crescimento & desenvolvimento
Epiderme/metabolismo
Epiderme/microbiologia
Doenças dos Peixes/genética
Doenças dos Peixes/microbiologia
Perfilação da Expressão Gênica/métodos
Regulação da Expressão Gênica no Desenvolvimento
Regulação Enzimológica da Expressão Gênica
Hepatopâncreas/crescimento & desenvolvimento
Hepatopâncreas/metabolismo
Hepatopâncreas/microbiologia
Palaemonidae/crescimento & desenvolvimento
Palaemonidae/microbiologia
Filogenia
Homologia de Sequência de Aminoácidos
Vibrio parahaemolyticus/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arthropod Proteins); EC 3.2.1.52 (Acetylglucosaminidase)
[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


  4 / 909 MEDLINE  
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[PMID]:29322345
[Au] Autor:Galvão RCF; Holanda IBB; De Carvalho DP; Almeida R; Souza CMM; Lacerda LD; Bastos WR
[Ad] Endereço:Instituto Federal de Educação Ciência e Tecnologia de Rondônia-IFRO, Rodovia BR-435 Km 63 Zona Rural, Caixa Postal 51, Colorado do Oeste, RO, 76993-000, Brazil.
[Ti] Título:Freshwater shrimps (Macrobrachium depressimanum and Macrobrachium jelskii) as biomonitors of Hg availability in the Madeira River Basin, Western Amazon.
[So] Source:Environ Monit Assess;190(2):77, 2018 Jan 10.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Total mercury (THg) concentrations measured in two freshwater shrimp species (Macrobrachium depressimanum and Macrobrachium jelskii) showed a relationship with the location of artisanal and small-scale gold mining (ASGM) from the Madeira River Basin, Western Amazon. Between August 2009 and May 2010, 212 shrimp samples were collected in the confluence of the Madeira River with three of its tributaries (Western Amazon). THg concentration was quantified in the exoskeleton, hepatopancreas and muscle tissue of the shrimps by cold vapor atomic absorption spectrophotometry. There were no significant differences between the two shrimp species when samples came from the Madeira River, but Hg concentrations were significantly lower in a tributary outside the influence of the gold mining area. Average THg concentrations were higher in the hepatopancreas (up to 160.0 ng g ) and lower in the exoskeleton and muscle tissue (10.0-35.0 ng g and < 0.9-42.0 ng g , respectively). Freshwater shrimps from the Madeira River respond to local environmental levels of Hg and can be considered as biomonitors for environmental Hg at this spatial scale. These organisms are important for moving Hg up food webs including those that harbor economic significant fish species and thus enhancing human exposure.
[Mh] Termos MeSH primário: Ouro
Mercúrio/análise
Mineração
Palaemonidae
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Exoesqueleto/química
Animais
Brasil
Monitoramento Ambiental
Hepatopâncreas/química
Músculos/química
Rios
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 7440-57-5 (Gold); FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180112
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-018-6460-6


  5 / 909 MEDLINE  
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[PMID]:29237574
[Au] Autor:Freire CA; Maraschi AC; Lara AF; Amado EM; Prodocimo V
[Ad] Endereço:Departamento de Fisiologia, Setor de Ciências Biológicas, Universidade Federal do Paraná, Curitiba, PR CEP 81531-990, Brazil. Electronic address: cafreire@ufpr.br.
[Ti] Título:Late rise in hemolymph osmolality in Macrobrachium acanthurus (diadromous freshwater shrimp) exposed to brackish water: Early reduction in branchial Na /K pump activity but stable muscle HSP70 expression.
[So] Source:Comp Biochem Physiol B Biochem Mol Biol;216:69-74, 2018 Feb.
[Is] ISSN:1879-1107
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Some Macrobrachium shrimps (Caridea, Palaemonidae) are diadromous; freshwater adults are truly euryhaline, while larvae need saline water for development. Branchial Na /K -ATPase (NKA) and carbonic anhydrase (CA) are involved in NaCl absorption in freshwater. This study aimed at verifying the time course of the osmoregulatory response of adult Macrobrachium acanthurus to high salinity brackish water (20‰), from the first 30min to 5days. The goal was to detect possible transition from hyper- to hyporegulation, the putative involvement of branchial NKA and CA, or the induction of muscular HSP70 expression. Hemolymph osmotic and ionic concentrations remained relatively stable and close to control levels until ~9h of exposure, but later increased consistently (~50%). A fast reduction in NKA activity (3-6h) was observed; these shrimps seem to shut off salt absorption already in the first hours. Later on, especially after 24h, hemolymph concentrations rise but HSP70 expression is not induced, possibly because constitutive levels are already sufficient to prevent protein damage. Time-dependent response mechanisms effective in high salinity brackish water, resulting in salt loading avoidance and suggestive of hyporegulation should be further investigated in decapods that evolutionary invaded freshwater.
[Mh] Termos MeSH primário: Proteínas de Artrópodes/biossíntese
Regulação da Expressão Gênica
Proteínas de Choque Térmico HSP70/biossíntese
Hemolinfa/metabolismo
Músculos/metabolismo
Palaemonidae/metabolismo
ATPase Trocadora de Sódio-Potássio/biossíntese
[Mh] Termos MeSH secundário: Animais
Concentração Osmolar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arthropod Proteins); 0 (HSP70 Heat-Shock Proteins); EC 3.6.3.9 (Sodium-Potassium-Exchanging ATPase)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180102
[Lr] Data última revisão:
180102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171215
[St] Status:MEDLINE


  6 / 909 MEDLINE  
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[PMID]:28547775
[Au] Autor:Sun J; Wang M; Liu H; Xie J; Pan Y; Xu C; Zhao Y
[Ad] Endereço:College of Food Science and Technology, Shanghai Ocean University, Shanghai, China.
[Ti] Título:Acidic electrolysed water delays browning by destroying conformation of polyphenoloxidase.
[So] Source:J Sci Food Agric;98(1):147-153, 2018 Jan.
[Is] ISSN:1097-0010
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Browning frequently occurs at fruits, vegetables and aquatic products during storage, and it drastically reduces the consumer's acceptability, with considerable financial loss. The objective of this paper was to investigate the effects of acidic electrolysed water (AEW) technology on polyphenoloxidase (PPO), which is an essential enzyme for browning. RESULTS: AEW ice exhibited a good ability in delaying browning in shrimp. Kinetic study revealed that AEW exhibited the mixed type inhibition of PPO with a K value of 1.96 mmol L . Moreover, both the circular dichroism spectrum and Fourier transform infrared spectroscopy analyses revealed that the α-helix in PPO decreased whereas random coil increased which indicates that PPO conformation was destroyed. CONCLUSION: Thus, this paper may provide a deeper understanding of the application of AEW technology for preventing browning in the food industry. © 2017 Society of Chemical Industry.
[Mh] Termos MeSH primário: Catecol Oxidase/química
Palaemonidae/enzimologia
Água/química
[Mh] Termos MeSH secundário: Animais
Dicroísmo Circular
Cor
Conservação de Alimentos
Cinética
Palaemonidae/química
Conformação Proteica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
059QF0KO0R (Water); EC 1.10.3.1 (Catechol Oxidase)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180102
[Lr] Data última revisão:
180102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170527
[St] Status:MEDLINE
[do] DOI:10.1002/jsfa.8449


  7 / 909 MEDLINE  
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[PMID]:28461222
[Au] Autor:Jørgensen LB; MacMillan HA; Overgaard J
[Ad] Endereço:Zoophysiology, Department of Bioscience, Aarhus University, C.F. Møllers Allé 3, Building 1131, 8000 Aarhus C, Denmark. Electronic address: lisa.b.joergensen@gmail.com.
[Ti] Título:Cold mortality is not caused by oxygen limitation or loss of ion homeostasis in the tropical freshwater shrimp Macrobrachium rosenbergii.
[So] Source:Cryobiology;76:146-149, 2017 Jun.
[Is] ISSN:1090-2392
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Using the tropical crustacean Macrobrachium rosenbergii we investigate two popular hypotheses proposed to explain loss of function in ectotherms exposed to critically high and low temperatures. Specifically, we examine whether acute cold stress disrupts hemolymph and muscle ion balance or causes a loss of oxygen availability. We found that acute cold stress causes loss of righting response at 13 °C, but that a cold-induced loss of ion-balance only occurs after onset of mortality. In regards to oxygen availability, we found no decrease in hemolymph oxygen content during cold exposure, and no changes in the concentrations of the anaerobic end products l-lactate and succinate in the tail muscle of the shrimp. Therefore, our results support neither of these two popular hypotheses and it remains unknown what physiological perturbations determine the lower limits of thermal tolerance in Macrobrachium rosenbergii.
[Mh] Termos MeSH primário: Temperatura Baixa/efeitos adversos
Palaemonidae/metabolismo
[Mh] Termos MeSH secundário: Animais
Hemolinfa/metabolismo
Homeostase
Ácido Láctico/metabolismo
Músculos/metabolismo
Oxigênio/metabolismo
Ácido Succínico/metabolismo
Equilíbrio Hidroeletrolítico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
33X04XA5AT (Lactic Acid); AB6MNQ6J6L (Succinic Acid); S88TT14065 (Oxygen)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171128
[Lr] Data última revisão:
171128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE


  8 / 909 MEDLINE  
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[PMID]:28715471
[Au] Autor:Chen CY; Chen PC; Weng FC; Shaw GT; Wang D
[Ad] Endereço:Biodiversity Research Center, Academia Sinica, Taipei, Taiwan.
[Ti] Título:Habitat and indigenous gut microbes contribute to the plasticity of gut microbiome in oriental river prawn during rapid environmental change.
[So] Source:PLoS One;12(7):e0181427, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Growing evidence points out that the capacity of organisms to acclimate or adapt to new habitat conditions basically depends on their phenomic plasticity attributes, of which their gut commensal microbiota might be an essential impact factor. Especially in aquatic organisms, which are in direct and continual contact with the aquatic environment, the complex and dynamic microbiota have significant effects on health and development. However, an understanding of the relative contribution of internal sorting (host genetic) and colonization (environmental) processes is still unclear. To understand how microbial communities differ in response to rapid environmental change, we surveyed and studied the environmental and gut microbiota of native and habitat-exchanged shrimp (Macrobrachium nipponense) using 16S rRNA amplicon sequencing on the Illumina MiSeq platform. Corresponding with microbial diversity of their living water areas, the divergence in gut microbes of lake-to-river shrimp (CK) increased, while that of river-to-lake shrimp (KC) decreased. Importantly, among the candidate environment specific gut microbes in habitat-exchanged shrimp, over half of reads were associated with the indigenous bacteria in native shrimp gut, yet more candidates presented in CK may reflect the complexity of new environment. Our results suggest that shrimp gut microbiota has high plasticity when its host faces environmental changes, even over short timescales. Further, the changes in external environment might influence the gut microbiome not just by providing environment-associated microbes directly, but also by interfering with the composition of indigenous gut bacteria indirectly.
[Mh] Termos MeSH primário: Ecossistema
Microbioma Gastrointestinal
Lagos
Rios
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Microbioma Gastrointestinal/genética
Palaemonidae/genética
RNA Ribossômico 16S/genética
Alinhamento de Sequência
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170718
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0181427


  9 / 909 MEDLINE  
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[PMID]:28666194
[Au] Autor:Gu X; Fu H; Sun S; Qiao H; Zhang W; Jiang S; Xiong Y; Jin S; Gong Y; Wu Y
[Ad] Endereço:Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China.
[Ti] Título:Dietary cholesterol-induced transcriptome differences in the intestine, hepatopancreas, and muscle of Oriental River prawn Macrobrachium nipponense.
[So] Source:Comp Biochem Physiol Part D Genomics Proteomics;23:39-48, 2017 Sep.
[Is] ISSN:1878-0407
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Cholesterol is an important nutrient for crustaceans. In this study, we performed comparative transcriptome analyses to explore the transcriptome differences in the intestine, hepatopancreas, and muscle of Macrobrachium nipponense fed either a low cholesterol (LC) or high cholesterol (HC) diet (2.8 or 17.1g cholesterol per kg diet). High-throughput RNA-Seq was conducted, resulting in 7.65, 5.88, and 7.59G clean bases from the intestine, hepatopancreas, and muscle of the LC group, respectively, and 7.59, 6.73, and 6.70G clean bases from the same tissues of the HC group. Assembly of clean reads resulted in 230,946 unigenes. The following enriched pathways were identified: xenobiotic and drug metabolism by cytochrome P450; chloroalkane and chloroalkene degradation; metabolic and biosynthetic pathways; fatty acid metabolism and biosynthesis; and immune-related pathways. To the best of our knowledge, this is the first study to describe how functional unigenes and biosynthetic and metabolic pathways are affected by dietary cholesterol in aquatic crustaceans. Thus, these results contribute to our understanding of the molecular mechanisms underlying the cholesterol requirement of crustaceans.
[Mh] Termos MeSH primário: Colesterol na Dieta/metabolismo
Dieta
Palaemonidae/genética
Palaemonidae/metabolismo
Transcriptoma
[Mh] Termos MeSH secundário: Animais
Biblioteca Gênica
Hepatopâncreas/metabolismo
Intestinos/metabolismo
Músculos/metabolismo
Reação em Cadeia da Polimerase em Tempo Real
Rios
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cholesterol, Dietary)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170701
[St] Status:MEDLINE


  10 / 909 MEDLINE  
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[PMID]:28654334
[Au] Autor:Solari P; Sollai G; Masala C; Loy F; Palmas F; Sabatini A; Crnjar R
[Ti] Título:Antennular Morphology and Contribution of Aesthetascs in the Detection of Food-related Compounds in the Shrimp Palaemon adspersus Rathke, 1837 (Decapoda: Palaemonidae).
[So] Source:Biol Bull;232(2):110-122, 2017 Apr.
[Is] ISSN:1939-8697
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Shrimp are an essential ecological component of marine ecosystems, and have commercial importance for human consumption and aquaculture. Like other decapod crustaceans, shrimp rely on chemical senses to detect and localize food resources by means of chemosensilla that are located mainly on the cephalothoracic appendages. Using the shrimp Palaemon adspersus, a model organism with omnivorous feeding behavior, we aimed to provide comparative information on the role of aesthetascs, antennular sensilla, and flicking behavior in food detection. To this end, we examined i) the morphology of antennular sensilla by field emission scanning electron microscopy, ii) the shrimp's sensitivity to a number of food-related compounds (amino acids and sugars) by means of whole-animal bioassays, and iii) the contribution of the aesthetasc sensilla to food detection. Our results showed that, aside from the aesthetascs, only three other main morphotypes of setae with chemoreceptive features were present in the antennules, thus accounting for relatively simple sensillar equipment. Nevertheless, we found broad-spectrum sensitivity of the shrimp to a number of amino acids (i.e., isoleucine, leucine, methionine, phenylalanine, glycine, tryptophan, cysteine, and tyrosine) and carbohydrates (trehalose, maltose, cellobiose, and fructose) that was consistent with the omnivorous or scavenging habits of the animal. Although aesthetasc ablation attenuated flicking behavior in a chemical stimulus-independent manner, success in detection and short-range localization of food did not rely on the presence of aesthetasc sensilla. This finding confirms the existence of a non-aesthetasc alternative pathway for feeding, with functional redundancy in simple generalist feeder models such as shrimp.
[Mh] Termos MeSH primário: Palaemonidae/anatomia & histologia
Palaemonidae/fisiologia
[Mh] Termos MeSH secundário: Aminoácidos/farmacologia
Animais
Antenas de Artrópodes/metabolismo
Antenas de Artrópodes/ultraestrutura
Sacarose na Dieta/farmacologia
Comportamento Alimentar/fisiologia
Microscopia Eletrônica de Varredura
Palaemonidae/efeitos dos fármacos
Palaemonidae/ultraestrutura
Sensilas/ultraestrutura
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amino Acids); 0 (Dietary Sucrose)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171025
[Lr] Data última revisão:
171025
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170628
[St] Status:MEDLINE
[do] DOI:10.1086/692696



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