Database : MEDLINE Search on : Pontederiaceae [Words] References found : 36 [refine] Displaying: 1 .. 10   in format [Detailed]

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[PMID]: 23461766 [Au] Autor: Lenicov AM; Hernández MC; Brentassi ME; Defea B [Ad] Address: Universidad Nacional de La Plata, División Entomología., Facultad de Ciencias Naturales y Museo, Paseo del Bosque s/n. (1900), La Plata, Argentina. marinoremes@gmail.com [Ti] Title: Descriptions of immatures of the South American plant hopper, Taosa (C.) longula. [So] Source: J Insect Sci;12:142, 2012. [Is] ISSN: 1536-2442 [Cp] Country of publication: United States [La] Language: eng [Ab] Abstract: Descriptions of the immature stages of Taosa (Cuernavaca) longula Remes Lenicov (Hemiptera: Fulgoroidea: Dictyopharidae) and a key for their identification is provided for specimens collected on the water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Commelinales: Pontederiaceae), in northeastern Argentina and Peru. Newly emerged nymphs from eggs collected in the field were reared in rearing chambers, and each stage was fixed to microscopic examination and illustration. Fifth nymphal instars can be easily recognized from congeners by the brown marked pattern coloration, shorter vertex, and the distinguishable median carina along the frons. Information on behavior and developmental time is also included. [Pt] Publication type: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Entry month: 1303 [Js] Journal subset: IM [St] Status: In-Process [do] DOI: 10.1673/031.012.14201

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[PMID]: 23145563 [Au] Autor: Ness RW; Siol M; Barrett SC [Ad] Address: Department of Ecology and Evolutionary Biology, University of Toronto, ON, Canada. rob.ness@ed.ac.uk [Ti] Title: Genomic consequences of transitions from cross- to self-fertilization on the efficacy of selection in three independently derived selfing plants. [So] Source: BMC Genomics;13:611, 2012. [Is] ISSN: 1471-2164 [Cp] Country of publication: England [La] Language: eng [Ab] Abstract: BACKGROUND: Transitions from cross- to self-fertilization are associated with increased genetic drift rendering weakly selected mutations effectively neutral. The effect of drift is predicted to reduce selective constraints on amino acid sequences of proteins and relax biased codon usage. We investigated patterns of nucleotide variation to assess the effect of inbreeding on the accumulation of deleterious mutations in three independently evolved selfing plants. Using high-throughput sequencing, we assembled the floral transcriptomes of four individuals of Eichhornia (Pontederiaceae); these included one outcrosser and two independently derived selfers of E. paniculata, and E. paradoxa, a selfing outgroup. The dataset included ~8000 loci totalling ~3.5 Mb of coding DNA. RESULTS: Tests of selection were consistent with purifying selection constraining evolution of the transcriptome. However, we found an elevation in the proportion of non-synonymous sites that were potentially deleterious in the E. paniculata selfers relative to the outcrosser. Measurements of codon usage in high versus low expression genes demonstrated reduced bias in both E. paniculata selfers. CONCLUSIONS: Our findings are consistent with a small reduction in the efficacy of selection on protein sequences associated with transitions to selfing, and reduced selection in selfers on synonymous changes that influence codon usage. [Pt] Publication type: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Entry month: 1301 [Js] Journal subset: IM [St] Status: In-Process [do] DOI: 10.1186/1471-2164-13-611

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[PMID]: 22437397 [Au] Autor: Leite KR; França F; Scatena VI [Ad] Address: Universidade Federal da Bahia, Salvador, Brazil. kellyrbleite@gmail.com [Ti] Title: Structural variations among monocot emergent and amphibious species from lakes of the semi-arid region of Bahia, Brazil. [So] Source: Braz J Biol;72(1):163-9, 2012 Feb. [Is] ISSN: 1678-4375 [Cp] Country of publication: Brazil [La] Language: eng [Ab] Abstract: Temporary lakes are common in the semi-arid region of the State of Bahia and form water mirrors in the rainy season. In this period, various vegetal species appear having different life forms adapted to the seasonality conditions of the rainfall regime. This work surveyed the adaptive anatomical structures of some emergent and amphibious monocot species occurring in these lakes. We studied the anatomy of roots, rhizomes, leaves and scapes of Cyperus odoratus, Oxycaryum cubense, Pycreus macrostachyos (Cyperaceae) - amphibious species; and of Echinodorus grandiflorus (Alismataceae), Eichhornia paniculata (Pontederiaceae) and Habenaria repens (Orchidaceae) - emergent species. The anatomical features of the dermal, fundamental and vascular systems confirming the tendency of the adaptive convergence of these plants to temporary lacustrine the environment include: single layered epidermal cells with a thin cuticle layer in the aerial organs; the presence of air canals in all the organs; few or no supporting tissues; and less numerous conducting elements and thinner cell walls in the xylem. The reduction of the supporting tissues, the number of stomata, which can even be absent, and the number of conducting elements and the degree of cell wall lignification in the xylem of the emergent species is more accentuated than that of the amphibious species. The pattern of distribution of aerenchyma in the roots of the studied species was considered important to distinguish between amphibious and emergent life forms. [Mh] MeSH terms primary: Adaptation, Physiological Alismataceae/anatomy & histology Cyperaceae/anatomy & histology Orchidaceae/anatomy & histology Pontederiaceae/anatomy & histology [Mh] MeSH terms secundary: Alismataceae/physiology Brazil Cyperaceae/physiology Lakes Orchidaceae/physiology Pontederiaceae/physiology [Pt] Publication type: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Entry month: 1211 [Js] Journal subset: IM [Da] Date of entry for processing: 120322 [St] Status: MEDLINE

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[PMID]: 21633114 [Au] Autor: Ness RW; Graham SW; Barrett SC [Ad] Address: Department of Ecology & Evolutionary Biology, University of Toronto, Ontario, Canada. rob.ness@utoronto.ca [Ti] Title: Reconciling gene and genome duplication events: using multiple nuclear gene families to infer the phylogeny of the aquatic plant family Pontederiaceae. [So] Source: Mol Biol Evol;28(11):3009-18, 2011 Nov. [Is] ISSN: 1537-1719 [Cp] Country of publication: United States [La] Language: eng [Ab] Abstract: Most plant phylogenetic inference has used DNA sequence data from the plastid genome. This genome represents a single genealogical sample with no recombination among genes, potentially limiting the resolution of evolutionary relationships in some contexts. In contrast, nuclear DNA is inherently more difficult to employ for phylogeny reconstruction because major mutational events in the genome, including polyploidization, gene duplication, and gene extinction can result in homologous gene copies that are difficult to identify as orthologs or paralogs. Gene tree parsimony (GTP) can be used to infer the rooted species tree by fitting gene genealogies to species trees while simultaneously minimizing the estimated number of duplications needed to reconcile conflicts among them. Here, we use GTP for five nuclear gene families and a previously published plastid data set to reconstruct the phylogenetic backbone of the aquatic plant family Pontederiaceae. Plastid-based phylogenetic studies strongly supported extensive paraphyly of Eichhornia (one of the four major genera) but also depicted considerable ambiguity concerning the true root placement for the family. Our results indicate that species trees inferred from the nuclear genes (alone and in combination with the plastid data) are highly congruent with gene trees inferred from plastid data alone. Consideration of optimal and suboptimal gene tree reconciliations place the root of the family at (or near) a branch leading to the rare and locally restricted E. meyeri. We also explore methods to incorporate uncertainty in individual gene trees during reconciliation by considering their individual bootstrap profiles and relate inferred excesses of gene duplication events on individual branches to whole-genome duplication events inferred for the same branches. Our study improves understanding of the phylogenetic history of Pontederiaceae and also demonstrates the utility of GTP for phylogenetic analysis. [Mh] MeSH terms primary: Gene Duplication/genetics Genome, Plant/genetics Phylogeny Pontederiaceae/genetics [Mh] MeSH terms secundary: Base Sequence Cell Nucleus/genetics Classification/methods DNA Primers/genetics Likelihood Functions Models, Genetic Molecular Sequence Data Multigene Family/genetics Sequence Analysis, DNA [Pt] Publication type: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S. [Nm] Name of substance: 0 (DNA Primers) [Em] Entry month: 1202 [Js] Journal subset: IM [Da] Date of entry for processing: 111025 [St] Status: MEDLINE [do] DOI: 10.1093/molbev/msr119

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[PMID]: 22017141 [Au] Autor: Franceschini MC; De Wysiecki ML; Poi de Neiff A; Galassi ME; Martínez Fedra S [Ad] Address: Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Ecología Aplicada del Litoral, Ruta 5, km 2,5 -3400- Corrientes, Argentina. celestefranceschini@yahoo.com.ar [Ti] Title: The role of the host-specific grasshopper Cornops aquaticum (Orthoptera: Acrididae) as consumer of native Eichhornia crassipes (Pontederiaceae) floating meadows. [So] Source: Rev Biol Trop;59(3):1407-18, 2011 Sep. [Is] ISSN: 0034-7744 [Cp] Country of publication: Costa Rica [La] Language: eng [Ab] Abstract: Cornops aquaticum is a widely distributed semiaquatic grasshopper in the Neotropics. The development, feeding and oviposition of C. aquaticum take place on Pontederiaceae, especially on species of Eichhornia. Several aspects of the feeding of C. aquaticum are studied because is one of the most important herbivores of the highly invasive floating Eichhornia crassipes in native areas. The aims of this paper were: (1) to quantify the amount of E. crassipes consumed by C. aquaticum, (2) to determine the growth rate and the conversion efficiency of food ingested by this grasshopper, and (3) to determine the possible effect of consumption on E. crassipes productivity. Thirty individuals from each specific age class were used in the experiment: nymphs A, nymphs B, adult males and adult females. Insects were individually confined in plastic pots with a leaf of E. crassipes. We estimated feeding by individual, consumption index (CI), relative growth rate (GR) and efficiency of conversion of ingested food to body substance (ECI). The impact of C. aquaticum consumption on E. crassipes floating meadows was assessed with the abundance of the grasshopper, and the available data on primary production of the host plant at the study site. Food intake of C. aquaticum was 11.23% of plant productivity. Food consumption, growth rate and food conversion efficiency of this grasshopper varied according to the specific age classes. Damage caused by C. aquaticum is high in comparison with the damage caused by other semiaquatic and grassland grasshoppers, however it is not enough to prevent the growth and coverage of native E. crassipes floating meadows because abundance of grasshoppers are realtively low and the growth rate and productivity of the host plant is high. [Mh] MeSH terms primary: Eichhornia/parasitology Feeding Behavior/physiology Grasshoppers/physiology [Mh] MeSH terms secundary: Animals Female Male [Pt] Publication type: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Entry month: 1111 [Js] Journal subset: IM [Da] Date of entry for processing: 111024 [St] Status: MEDLINE

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[PMID]: 21721243 [Au] Autor: Villabona-González SL; Aguirre NJ; Estrada AL [Ad] Address: Grupo de investigación GAIA, Departamento de ingeniería, Universidad de Antioquia, apartado 1226, Medellín, Cra 55 Av. Del Ferrocarril, Colombia. silvillabo_81@yahoo.com [Ti] Title: Influencia de las macrófitas sobre la estructura poblacional de rotíferos y microscrustáceos en un plano de inundación tropical. [The influence of macrophytes on rotifer and microcrustacean assemblage in a tropical floodplain]. [So] Source: Rev Biol Trop;59(2):853-70, 2011 Jun. [Is] ISSN: 0034-7744 [Cp] Country of publication: Costa Rica [La] Language: spa [Ab] Abstract: Most studies on zooplankton ecology have been conducted in open waters. However, it has been considered of great importance to extend such studies to other habitats, such as those generated of macrophytes. We studied the spatial and temporal variation of the microcrustacean and rotifer assemblage structures associated with macrophytes, and compare them with the variation exhibited in open waters. Integrated samples were collected for zooplankton and phytoplankton biomass using a Schindler bottle, in four open water sites and four other sites covered by macrophytes in the floodplain complex of Ayapel (Córdoba, Colombia) during different limnimetric levels. The significant differences in the structure were evaluated using Kruskal & Wallis and discriminant analyses, and the similarity among sampling sites was evaluated using Bray & Curtis analysis. Zooplanktonic richness was favored by macrophytes. However, we did not find a constant spatial pattern for density, and only particular trends apparently conditionated by flood pulses. The presence of Eichhornia azurea (Pontederiaceae) contributed in a significant way with an increase in the diversity and density of benthic taxa. The density of some zooplanktonic groups was related with environmental conditions and phytoplanktonic biomass. [Mh] MeSH terms primary: Angiosperms/physiology Crustacea/physiology Ecosystem Phytoplankton/physiology Rotifera/physiology [Mh] MeSH terms secundary: Animals Colombia Crustacea/classification Environmental Monitoring/methods Fresh Water Population Density Rotifera/classification [Pt] Publication type: ENGLISH ABSTRACT; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Em] Entry month: 1109 [Js] Journal subset: IM [Da] Date of entry for processing: 110701 [St] Status: MEDLINE

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[PMID]: 21715262 [Au] Autor: Palani S; Raja S; Kumar RP; Selvaraj R; Kumar BS [Ad] Address: Department of Biotechnology, Anna Bioresearch Foundation, Arunai Engineering College, Tiruvannamalai, Tamil Nadu, India. spalanitvm@gmail.com [Ti] Title: Evaluation of phytoconstituents and anti-nephrotoxic and antioxidant activities of Monochoria vaginalis. [So] Source: Pak J Pharm Sci;24(3):293-301, 2011 Jul. [Is] ISSN: 1011-601X [Cp] Country of publication: Pakistan [La] Language: eng [Ab] Abstract: Monochoria vaginalis is an herbaceous medicinal plant used to treat, liver problems India. Acetaminophen is a commonly used analgesic and antipyretic agent which, at high doses, causes liver and kidney necrosis in man and animals. The aim of the present study is to evaluate phytoconstituents and investigate the nephroprotective & antioxidant activities of the ethanol extract of Monochoria vaginalis on acetaminophen induced toxicity in rats. Phytoconstituents like n-hexadecanoic acid, 3-methyl- acetate-1-butanol, 1,1,3-triethoxy- propane, Z,Z,Z-1,4,6,9 - nonadecatetraene, undecanoic acid, 3-trifluoroacetoxy penta decane and 4-ethyl-5-octyl-2,2-bis (trifluoromethyl) - cis-1,3-dioxalone were identified from ethanol extract of Monochoria vaginalis by using a gas chromatograph-mass spectrograph (GC MS). Biochemical studies show that there is an increase in the levels of serum urea and creatinine along with an increase in the body weight and reduction in the levels of uric acid in acetaminophen induced groups. These values are retrieved significantly by treatment with Monochoria vaginalis extracts at two different doses. The antioxidant studies reveal that the levels of renal SOD, CAT, GSH and GPx in the APAP treated animals are increased significantly along with a reduced MDA content in ethanol extract of Monochoria vaginalis treated groups. Apart from these, histopathological changes also reveal the protective nature of the Monochoria vaginalis extract against acetaminophen induced necrotic damage of renal tissues. In conclusion, these data suggest that the ethanol extract of Monochoria vaginalis can prevent renal damage from APAP induced nephrotoxicity in rats and it is likely to be mediated through active phytoconstituents and its antioxidant activities. [Mh] MeSH terms primary: Antioxidants/pharmacology Kidney Diseases/pathology Kidney Diseases/prevention & control Phytotherapy/methods Plant Extracts/pharmacology [Mh] MeSH terms secundary: Acetaminophen Animals Creatine/blood Disease Models, Animal Ethanol/chemistry Kidney Diseases/blood Kidney Diseases/chemically induced Kidney Diseases/enzymology Male Necrosis/pathology Necrosis/prevention & control Oxidative Stress/drug effects Plant Components, Aerial/chemistry Plant Extracts/analysis Plant Extracts/chemistry Pontederiaceae/chemistry Rats Rats, Wistar Urea/blood Uric Acid/blood [Pt] Publication type: JOURNAL ARTICLE [Nm] Name of substance: 0 (Antioxidants); 0 (Plant Extracts); 103-90-2 (Acetaminophen); 57-00-1 (Creatine); 57-13-6 (Urea); 64-17-5 (Ethanol); 69-93-2 (Uric Acid) [Em] Entry month: 1109 [Js] Journal subset: IM [Da] Date of entry for processing: 110630 [St] Status: MEDLINE

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[PMID]: 21193832 [Au] Autor: Ahmad N; Hamayun M; Khan SA; Khan AL; Lee IJ; Shin DH [Ad] Address: Department of Botany, Islamia College University Peshawar, Pakistan. [Ti] Title: Gibberellin-producing endophytic fungi isolated from Monochoria vaginalis. [So] Source: J Microbiol Biotechnol;20(12):1744-9, 2010 Dec. [Is] ISSN: 1738-8872 [Cp] Country of publication: Korea (South) [La] Language: eng [Ab] Abstract: The role of endophytic fungi in plant growth and development is well documented. However, endophytic fungi with growth promotion capacity have never been isolated from weeds previously. In the current study, we isolated 8 fungal endophytes from the roots of Monochoria vaginalis, a serious weed of rice paddy in Korea. These isolates were screened on Waito-C, in order to identify plant growth promoting metabolites. Two fungal isolates (M5.A & M1.5) significantly promoted the plant height and shoot length of Waito-C during preliminary screening experiments. The culture filtrates (CFs) of M5.A and M1.5 also promoted the shoot length of Echinocloa crusgalli. Gibberellins (GAs) analysis of the CFs of M5.A and M1.5 showed that these endophytic fungi secrete higher quantities of GAs as compared with wild-type G. fujikuroi KCCM12329. The CF of M5.A contained bioactive GAs (GA3, 2.8 ng/ml; GA4, 2.6 ng/ml, and GA7, 6.68 ng/ml) in conjunction with physiologically inactive GA9 (1.61 ng/ml) and GA24 (0.18 ng/ml). The CF of M1.5 contained physiologically active GAs (GA3, 1.64 ng/ml; GA4, 1.37 ng/ml and GA7, 6.29 ng/ml) in conjunction with physiologically inactive GA9 (3.44 ng/ml), GA12 (0.3 ng/ml), and GA24 (0.59 ng/ml). M5.A and M1.5 were identified as new strains of Penicillium sp. and Aspergillus sp., respectively, based on their 18S rDNA sequence homology and phylogenetic analysis. [Mh] MeSH terms primary: Aspergillus/classification Aspergillus/metabolism Gibberellins/biosynthesis Penicillium/classification Penicillium/metabolism Pontederiaceae/microbiology Symbiosis [Mh] MeSH terms secundary: Aspergillus/isolation & purification Aspergillus/physiology Cluster Analysis DNA, Fungal/chemistry DNA, Fungal/genetics DNA, Ribosomal/chemistry DNA, Ribosomal/genetics Genes, rRNA Korea Molecular Sequence Data Penicillium/isolation & purification Penicillium/physiology Phylogeny Plant Roots/microbiology RNA, Fungal/genetics RNA, Ribosomal, 18S/genetics Sequence Analysis, DNA [Pt] Publication type: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Name of substance: 0 (DNA, Fungal); 0 (DNA, Ribosomal); 0 (Gibberellins); 0 (RNA, Fungal); 0 (RNA, Ribosomal, 18S) [Em] Entry month: 1104 [Js] Journal subset: IM [Da] Date of entry for processing: 110103 [St] Status: MEDLINE

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[PMID]: 20877988 [Au] Autor: Silva FR; Marques MI; Battirola LD; Lhano MG [Ad] Address: PPG em Ecologia e Conservação da Biodiversidade, Univ Federal de Mato Grosso, Cuiabá, MT, Brasil, 78060-900. fateca@gmail.com.br [Ti] Title: Fenologia de Cornops aquaticum (Bruner) (Orthoptera: Acrididae) em Eichhornia azurea (Pontederiaceae) no norte do Pantanal de Mato Grosso. [Phenology of Cornops aquaticum (Bruner) (Orthoptera: Acrididae) in Eichhornia azurea (Pontederiaceae) in the northern region of Pantanal of Mato Grosso, Brazil]. [So] Source: Neotrop Entomol;39(4):535-42, 2010 Jul-Aug. [Is] ISSN: 1519-566X [Cp] Country of publication: Brazil [La] Language: por [Ab] Abstract: Cornops aquaticum (Bruner) has Eichhornia crassipes, E. azurea, Pontederia cordata and P. lanceolata (Pontederiaceae) as the known host plants. This grasshopper species is cited as a possible agent of biological control for native aquatic macrophytes E. azurea and E. crassipes. This study, carried out from March, 2006 to February, 2007, aimed to evaluate the phenology and age structure of the population of C. aquaticum associated with E. azurea in Piuval bay, Pantanal of Poconé, MT, and to identify possible relationships of its life cycle to abiotic factors such as insolation, temperature and precipitation. Monthly collections of 50 individuals were carried out according to the protocol defined by the "Host - Insect Coevolution on Waterhyacinth" project. Adults and nymphs were separated and the females dissected in order to evaluate ovary maturation. The population presented adults and nymphs during the whole year, suggesting the occurrence of more than one reproductive period. The nymphs from the first stage predominated in August 2006 and the adults in September and October 2006, synchronized with the dry period and beginning of the flooding period, respectively. The highest relative abundance of the females with mature ovaries occurred in July 2006 (50%), indicating that this may be a more propitious period for reproduction. The data suggest that C. aquaticum is a species in continual reproduction in Piuval bay and its cycle is associated with the environmental conditions guided by the flood pulse in the Pantanal of Mato Grosso. [Mh] MeSH terms primary: Grasshoppers/growth & development Pontederiaceae/parasitology [Mh] MeSH terms secundary: Animals Brazil Female Life Cycle Stages Male Wetlands [Pt] Publication type: ENGLISH ABSTRACT; JOURNAL ARTICLE [Em] Entry month: 1011 [Js] Journal subset: IM [Da] Date of entry for processing: 100929 [St] Status: MEDLINE

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[PMID]: 20187391 [Au] Autor: Chen JJ; Lu XM; Lu SY; Jin XC; Huang MS; Zhang Y; Zhao F [Ad] Address: Research Center for lake Ecology & Environments, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. jjchen1980s@yahoo.com.cn [Ti] Title: [Diurnal variations in purifying-tanks when use Pontederia cordata treating the Malodorous River water]. [So] Source: Huan Jing Ke Xue;30(12):3585-9, 2009 Dec. [Is] ISSN: 0250-3301 [Cp] Country of publication: China [La] Language: chi [Ab] Abstract: Aquatic plants (Ponsederie cordaza) were waked in two purifying-tanks to investigate the effects of illumination intensity and aeration on diurnal variations of Chla, SP, POD of Ponsederia cordaza and pH, DO, COD, NH4+ -N, TP of water from purifying-tanks when treating the malodorous river water at seven different times, another blank purifying-tank was set as a control. Comparative studies and correlation analysis of these different indicators were carried out to improve the plants working efficiency and provide scientific basis for optimal operation of plant purifying-tanks. Results showed that all indicators affected by changes of light, TP shows best correlation coefficient Cr = 0.93, p < 0.01) of physicochemical indicators and SP behaves best correlation coefficient Cr = 0.91 , p < 0.01) of plant physiology indicators in non-aeration purifying-tank;aeration is necessary as diurnal average of DO shows an increase of 0.13 mg/L by treatment of plant meanwhile 1.8 mg/L by plant with aeration,purifying-tanks with aeration got 7.1%, 6.3% higher removing rates of COD, NH4+ -N and 38% less TP removing rate than non-aeration plant purifying-tanks (p < 0.01); with aeration treatment, significant reduction of Chla, SP content (p < 0.05) and increase of POD activity (p < 0.05) observed in plants; the changes of illumination intensity and aeration can significantly affect physiological characteristics of plants and should be considered carefully and need further study when treating malodorous river water by plant purifying-tanks. [Mh] MeSH terms primary: Pontederiaceae/physiology Water Pollutants, Chemical/isolation & purification Water Pollutants, Chemical/metabolism Water Purification/methods [Mh] MeSH terms secundary: Biodegradation, Environmental Circadian Rhythm Fresh Water/analysis Nitrogen/isolation & purification Nitrogen/metabolism Organic Chemicals/isolation & purification Organic Chemicals/metabolism Oxygen/chemistry Pontederiaceae/metabolism Rivers [Pt] Publication type: ENGLISH ABSTRACT; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T [Nm] Name of substance: 0 (Organic Chemicals); 0 (Water Pollutants, Chemical); 7727-37-9 (Nitrogen); 7782-44-7 (Oxygen) [Em] Entry month: 1012 [Js] Journal subset: IM [Da] Date of entry for processing: 100301 [St] Status: MEDLINE

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