Effects of lead toxicity on the photosynthetic bacterium, Rhodopseudomonas spheroides

  • 101 Pages
  • 2.34 MB
  • English
Statementby Ronald Terrance Watanabe.
LC ClassificationsMicrofilm 50316 (Q)
The Physical Object
Paginationvii, 101 p.
ID Numbers
Open LibraryOL2161575M
LC Control Number88890520

This study investigated the effects of eight light sources on photosynthetic bacteria (Rhodopseudomonas palustris) growth and carotenoid content (CD), cultured for sources were incandescent lamp (IL), halogen lamp (HL), fluorescence lamp (FL), and light-emitting diodes (LEDs) of white (LW), yellow (LY), red (LR), blue (LB), and green (LG).Cited by:   Among the four methods for extracting extracellular polymeric substances (EPS) from Rhodopseudomonas acidophila (EDTA, NaOH, H2SO4, heating/centrifugation), EDTA extraction was found to be the most effective.

The contents of the major components of EPS from R. acidophila, i.e., carbohydrate, protein and nucleic acid, wereand mg g−1 dry Cited by: 1.

The dichroism was measured at varied wavelengths of polarized light in “intact” cells of Rhodopseudomonas palustris and in films of air-dried lamellar fragments of the bacterium.

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The values for the dichroism (ΔA A) of bacteriochlorophyll in lamellae were found to be − at nm and + at and nm Air drying of the lamellar fragments in films did not essentially Cited by: Rhodopseudomonas Rhodopseudomonas spheroides book strain GJ is known as a phyllosphere biocontrol agent.

In this paper, we described detailed processes of strain GJ colony establishment at various colonization stages. Effects of incident light levels on photosynthetic membrane polypeptide composition and assembly in Rhodopseudomonas sphaeroides.

Takemoto J, Huang Kao MY. Cells of Rhodopseudomonas sphaeroides were grown anaerobically with incident light levels ranging between 4, and footcandles (ca. 48, and 4, lux).Cited by: Some mutational changes in the photosynthetic pigment system of Rhodopseudomonas spheroides.

GRIFFITHS M, STANIER RY. PMID: [PubMed - indexed for MEDLINE] MeSH Terms. Biological Products* Mutation* Photosynthesis* Pigments, Biological/metabolism* Rhodobacter sphaeroides* Rhodopseudomonas* Substances. Biological Products; Pigments Cited by: Effects of the measuring light on the photochemistry of the bacterial photosynthetic reaction center from Rhodobacter DP, Blankenship RE () Kinetics and thermodynamics of the P + Q B − reaction in isolated reaction centers from the photosynthetic bacterium Rhodopseudomonas sphaeroides.

Biochim Biophys Acta –54 CrossRef Cited by: 3. MADIGANANDGEST RESULTS Chemoautotrophic growth of R. capsu- lata in darkness with H2 as the energy source. The kinetics of chemoautotrophic growth of R. Rhodopseudomonas spheroides book with H2 as the sole energysourceunderaerobic conditionsin dark- ness are shown in Fig.

Cells grown in this fashion show zig-zag chain formations, a well- known characteristic of R. capsulata observed. A simple route for the synthesis of cadmium sulfide nanoparticles by photosynthetic bacteria Rhodopseudomonas palustris has been demonstrated [20.

Available NBS Primary Samples for Lead in Various Environmental Samples Microbial Me thy la t ion of Lead Compounds Effect of Pb and Mn on Tetrapyrrole Synthesis in Rhodopseudomonas spheroides Lead Content of Bryophytes and Their Substrates Natural Lead Levels in the Ash of Native, Noncrop U.S.

Plants. Consequently, toxicity causes mutagenicity effects and/or cell death that lead to immeasurable damage in microorganisms and microbial community. The biochemical and molecular mechanisms of metal toxicity may be helpful to depth metal toxicity study in microbes and other organisms for controlling and treating the metal toxicity in by: 2.

Photosynthesis Research, ISSN6/, VolumeIssue 3, pp. - ADVERTISEMENTS: In this article we will discuss about the presence of pigments in photosynthetic bacteria. Because of the presence of carotenoids in all photosynthetic tissues their role is anticipated in photosynthesis.

The tissue/cells rich in carotenoids devoid of chlorophyll do not photosynthesize. Light energy absorbed by carotenoids appears to be transferred to. Oriental Journal of Chemistry is a peer reviewed quarterly research journal of pure and applied chemistry.

It publishes standard research papers in almost all thrust areas of current chemistry of academic and commercial importance.

It provides a platform for rapid publication of quality research papers, reviews and chemistry letters. Oriental Journal of Chemistry is abstracted. Electron Flow in Photosynthetic Bacteria. The photosynthetic bacterium Chlorobium uses; A) H 2 S as an electron donor forming elemental sulfur as a byproduct.

B) To learn more about the book this website supports, please visit its Information Center.

Details Effects of lead toxicity on the photosynthetic bacterium, Rhodopseudomonas spheroides EPUB

Synthesis, characterization and stability of r-Ag NCs. Since our goal was to find out the Ag nanoparticle induced molecular mechanism of Cited by: Start studying Ch 4-A: Photosynthesis. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Photosynthesis genes and their expression in Rhodobacter sphaeroides a tribute to my students and associates ally Rhodopseudomonas spheroides) were conducted in the laboratories of Drs June Lascelles (Lascelles fate of the photosynthetic apparatus in steady-state photosynthetically growingR.

sphaeroides. Effects of Toxicity. If dogs have ingested large quantities of raisins or grapes, acute kidney failure will usually develop within days.

Symptoms of kidney failure include vomiting, diarrhoea, dehydration, abdominal pain, and tremors or seizures. Photosynthetic Conditions In cyanobacteria, light exerts a fundamental role on gene ex-pression.

The effect of light and the photosynthetic electron transport (PET) through both photosystems has been analyzed by microarray analysis or by Northern blot of specific genes in Synechocystis (Hihara et al.,; Navarro et al., ). Where are photosynthetic pigments located.

in bacteria, located on the plasma membrane. photosystems. clusters of pigments in the thylakoid membrane, consists of proteins and to pigment molecules; functional partners or electron transfer chains in the thylakoid membrane. Other microbial enzymes are inhibited by cyanide.

For example, 1 mM NaCN inhibited purified 6-aminolaevulate dehydratase from photosynthet- ically grown Rhodopseudomonas spheroides (van Heyningen and Shemin, ). The enzyme C02 reductase from Chlostridium pasteurianwn ATCC was inactivated by lO"*1 M cyanide (Thauer et al., ).

The effect of salt stress оn some physiological parameters in pigeon pea (Cajanus cajan) was studied under controlled conditions. The plants were treated with the solutions of 50 mM NaCl, 50 mM Na 2So 4, mM NaCl and mM Na 2So 4 water was used for irrigation as the control. It was established that the applied doses of both salt types.

Photosynthetic Ability of Chlamydomonas reinhardi1 Doris Teichler-Zallen2 The Biological Laboratories, Harvard University, Cambridge, Massachusetts Received Novetn Abstract.

Manganese deficiency was induced in mixotrophically-grown cultures of the green alga Chlamydomonas reinhardi and the effects of this deficiency on Cited by: Figure 1. Chromophores in the photosynthetic reaction center of Rhodopseudomonas Viridis.

Numbers in the box denote the calculated electronic factor in au unit,39 Numbers under the box are the observed reaction time. The nuclear coordinates are taken from 1PRC6 in Protein Date Bank.7 J. Phys. Chem. B, Madigan et al., Growth of the photosynthetic bacterium Rhodopseudomonas capsulata chemoautotrophically in darkness with H2 as the energy source.

J Bacteriol. Jan. ;(1) We used mathematical models of photosynthesis to quantify the effects of ultraviolet (UV) radiation on the photosynthetic potential of Prochlorococcus and Synechococcus marine cyanobacteria living at 0 degrees and 40 degrees N/S latitude. We show that UV is an environmental stressor for these organisms near the ocean surface, accounting for roughly two-thirds of the potential photo synthetic Author: Dailé Avila-Alonso, Jan M.

Baetens, Rolando Cardenas, Bernard De Baets. and photosynthetic rates and carbon metabolism of the freshwater algae Chlamydomonas reinhardtii Dangeard was examined. Relative growth constants were, and in green, white, blue and red light respect- ively.

Photosynthetic rates were higher in white, blue or red than in green light of the same intensity. Effects of Lindane on the Photosynthetic Apparatus of the Cyanobacterium Anabaena Fluorescence Induction Studies and Immunolocalization of Ferredoxin-NADP + Reductase Marta Bueno 1, Maria F.

Fillat, Reto J. Strasser 2, Ronald Maldonado-Rodriguez 2, Nerea Marina, Henry Smienk. Figure 1: Pathway of the techniques used to fabricate the layers containing silver nanoparticles.

Figure 2: Plan-view (a) and cross-sectional (b) TEM images of a sample elaborated combining silver sputtering and Plasma Enhanced Chemical Vapor Deposition.

In the images the dark contrast spherical-like zones are silver nanoparticles (AgNPs). Ag causes 5 nm shift in PC towards blue region and 4 nm Toxicity and accumulation of lead and cadmium in shift in Chl a towards red region.

Description Effects of lead toxicity on the photosynthetic bacterium, Rhodopseudomonas spheroides PDF

the filamentous green alga Cladophora fracta:A This spectral alterations suggest changes in energy laboratory study. Sci. Asia., transport from PC to Chl a. Similar findings were obtained 3.effects ranging from chemical (bioavailable metal concentration), biological (acute and chronic toxicity) and ecological (loss of habitat and elimination of sensitive species) to others (Gray, ).

Additionally, human exposure occurs by ingestion of contaminated water through drinking, preparation of food.LEVINE AND GORMAN--LIGHT INDUCED ABSORBANCE CHANGES IN C.

REINHARDI illumination with either nm or nm light resulted in a decrease in absorbance at and nm (fig 2, 3). The absorbance changes de- tected in the wild type strain can be ascribed to 2 components; one showing a maximum absorbance change at nmandthe other showinga Cited by: