Last edited by Tygogul
Saturday, November 21, 2020 | History

2 edition of photosynthetical effect of ultra-violet radiation on some marine algae found in the catalog.

photosynthetical effect of ultra-violet radiation on some marine algae

Nils Gunnar Johnson

photosynthetical effect of ultra-violet radiation on some marine algae

  • 35 Want to read
  • 17 Currently reading

Published by Elanders boktr. in Göteborg .
Written in English

  • Photosynthesis.,
  • Ultraviolet radiation.,
  • Algae.

  • Edition Notes

    Statementby N.G. Johnson and T. Levring.
    SeriesGöteborgs kungl. vetenskaps- och vitterhets-sämhalles handlingar, 6. följden, ser.B,, bd. 5, n:o 3
    ContributionsLevring, Tore, 1913- joint author.
    LC ClassificationsAS284 .G7 föl. 6, ser. B, bd. 5, no. 3
    The Physical Object
    Pagination5 p.
    ID Numbers
    Open LibraryOL194106M
    LC Control Numbera 48008096

    losus plants were permitted to carry on photosynthesis in sea water in the presence of either Na 2 C 14 O 3 or C 14 O 2, and the radioactive products of photosynthesis were examined by main compound in the ethanol-soluble fraction was mannitol, which contained up to 95% of the soluble activity. Citric acid and glutamine also accumulated considerable activity. Two algae survived 16 months on the exterior of the International Space Station ISS despite extreme temperature fluctuations and the vacuum of space as well as considerable UV and cosmic radiation. That was the astonishing result of an experiment conducted by Dr. Thomas Leya at the Fraunhofer Institute for Cell Therapy and Immunology IZI in. The CO2 exchange of several species of fresh water and marine algae was measured in the laboratory to determine whether photorespiration occurs in these organisms. The algae were positioned as thin layers on filter paper and the CO2 exchange determined in an open gas exchange system. In either 21 or 1% O2 there was little difference between 14CO2 and 12CO2 uptake.

Share this book
You might also like
Sudbury Area Planning Board : annual report

Sudbury Area Planning Board : annual report

Winston Churchill (Livewire Real Lives)

Winston Churchill (Livewire Real Lives)

English elements.

English elements.

Cooking for invalids in home and hospital

Cooking for invalids in home and hospital

Edwards menagerie dogs

Edwards menagerie dogs

Block and graft copolymerization

Block and graft copolymerization

Culture moves

Culture moves

Memorials of Middlebie Parish

Memorials of Middlebie Parish

model of interpersonal speech communication

model of interpersonal speech communication

Official guide

Official guide

soul of a child

soul of a child

photosynthetical effect of ultra-violet radiation on some marine algae by Nils Gunnar Johnson Download PDF EPUB FB2

Get this from a library. The photosynthetical effect of ultra-violet radiation on some marine algae. [Nils Gunnar Johnson; Tore Levring]. This article provides an overview of existing literature on the ultraviolet-B (UV-B) radiation effects on algae and cyanobacteria.

We report on the effects of UV-B radiation to the growth and development, biomass, sensitivity, photosynthetic pigments, UV-B absorbing compounds, photosynthesis, protein and DNA damage, enzyme activity, nitrogen fixation and assimilation of nitrogen, protective Cited by:   As ultraviolet (UV) radiation has been implicated in recent reports of “environmental stress” in shallow water marine ecosystems, we have studied the effect of UV on two symbiotic associations; the temperate dinoflagellate Symbiodinium californium and its host Anthopleura elegantissima, and the tropical dinoflagellate S.

microadriaticum and its host Cassiopeia by: The effect of artificial ultraviolet (UV) and natural solar radiation on photosynthesis, respiration and growth was investigated in 14 red, green and brown macroalgal species on Spitsbergen.

Harmful effects of UV radiation in Algae and aquatic macrophytes – A review Article (PDF Available) in Emirates Journal of Food and Agriculture 24(6) December with 2, Reads.

Cruces E, Huovinen P, Gomez I. Interactive effects of UV radiation and enhanced temperature on photosynthesis, phlorotannin induction and antioxidant activities of two sub-Antarctic brown algae.

Marine Biology. ; (1): 1– [Google Scholar]. Photosynthetically active radiation (PAR) is light of wavelengths nm and is the portion of the light spectrum utilised by plants for photosynthesis.

Photosynthetic photon flux density (PPFD) is defined as the photon flux density of PAR. Modern instruments measure light as the rate at which moles ( × 10 23 quanta) of PAR land on a unit area (μmol quanta m −2 s −1); however, it. Algae - Algae - Photosynthesis and light-absorbing pigments: Photosynthesis is the process by which light energy is converted to chemical energy whereby carbon dioxide and water are converted into organic molecules.

The process occurs in almost all algae, and in fact much of what is known about photosynthesis was first discovered by studying the green alga Chlorella. A list of marine algae from Australia and Göteborgs Bot. Trädg. The photosynthetical effect of ultra-violet radiation of some marine algae.

Göteborgs K. Vet. och Vitterhetssamh. Handl Sjätte följden, ser. B, 5 (3): (Medd. Oceanogr. Inst. Göteborg, 11). Submarine daylight and the photosynthesis of.

I.A. Brooks and W. Arnold: Some effects of Å on green algae and chloroplast preparations. gen. Physiol. 34, – (). PubMed CrossRef Google Scholar. A review is presented of the physiological mechanisms developed bybenthic macroalgae to cope with deleterious wavelengths, particularly UVradiation.

Photoinhibition of photosynthesis, is a photoprotectivemechanism in various species studied in southern Spain. Incubations inoutdoor systems and transplantation experiments under natural radiationallowed to led to understanding of some the. UV radiation have differential effects on photosynthesis in these macroalgae.

For some species. e.g., the endemic inter- tidal red alga Rissoellu verruculosa, levels of PAR close to p,mol m ’ s ‘, typical of a summer midday, exert similar photoinhibitory effect on photosynthesis to the full. Marine algae can survive in harsh conditions (i.e., withstand heat, cold, ultra-violet radiation, salinity, and desiccation) [8,9,19] due to their ability to adapt to physiological changes by producing stress tolerant substances.

For example, algae produce organic osmolytes during stress conditions, which also act as antioxidants and heat. macro algae have developed a number of mechanisms to cope with the deleterious effects of UVB radiation, such as avoidance, DNA repair by photoreactivation processes and protection One of the strategies used by macroalgae to survive exposure to high levels of UV radiation is the synthesis and accumulation of UV screening.

Effects of UV-B radiation on biomass and composition on marine phytoplankton communities. Sci. Mar. 60 81– Whitton B. “ Taxonomy and biology of blue-green algae,” in Fine Structure and Taxonomy on the Blue-Green Algae, ed.

Desikachary T. V., editor. (Chennai: University of. Effect on photosynthetic pigments The effect of UV-B and high light on qualitative as well as quantitative changes in photosynthetic pigments is shown in Fig. 1A & B. The UV-B radiation for 6 h resulted in an increase in chlorophyll a, phycobilins, β-carotene and carotenoids in N.

spongiaeforme, whereas in P. corium showed a. Read this article to learn about the effects of radiation on plants and animals. Effects of Radiation on Plants: According to the Health Physics Society radiations have a positive effect on plant growth at lower radiation levels and harmful effects at high levels.

Plants need some types of non-ionizing radiation like sun-light for photosynthesis. - at very low light intensity both algae and plants can convert as much as 20 % of photosynthetically active radiation [PAR ~ visible light] into biomass energy but when growing at full sunlight the conversion in both cases [plants and algae] is reduced to 2 to 3.

In field studies conducted at the Kongsfjord (Spitsbergen), the effect of filtered natural radiation conditions (solar without ulraviolet [UV]‐A+UV‐B, solar without UV‐B, solar) on photosynthesis and the metabolism of UV‐absorbing mycosporine‐like amino acids (MAAs) in the marine red alga Devaleraea ramentacea have been studied.

While solar treatment without UV‐A+UV‐B did not. in marine algae over the visible spectrum. Unfortunately he did not measure the absorption spectra of the algae used, but compared them with the pub- lished curves of Seybold and Weisweiler (). On the whole, just as in Engle- mann's work, photosynthetic rate in green and brown algae corresponded fairly.

Photosynthetic acclimation to solar UV radiation of marine red algae from the warm-temperate coast of southern Spain: A review** F´elix L.

Figueroa ∗ &Iv´an G omez´ 1 Departamento de Ecolog´ıa, Facultad de Ciencias, Universidad de M´alaga, Campus Universitario de Teatinos s/n, E M´alaga, Spain. Radiation - Radiation - Effects of visible and ultraviolet light: Life could not exist on Earth without light from the Sun.

Plants utilize the energy of the Sun’s rays in the process of photosynthesis to produce carbohydrates and proteins, which serve as basic organic sources of food and energy for animals. Light has a powerful regulating influence on many biologic systems.

During spring and fall we carried out experiment in tropical southern China to determine the short- and long-term effects of solar ultraviolet radiation (UVR, – nm) on photosynthesis and growth in the unicellular red alga Porphyridium the experimentation, cells of P.

cruentum were exposed to three radiation treatments: (a) samples exposed to PAR (– nm. In a second study centered on the effects of UV-B radiation on algal growth, ecologist Max Bothwell () performed an experiment using UV-filtering and UV-transparent Saran Wrap to grow algae in the South Thompson River in British Columbia, Canada.

He hypothesized that UV radiation would produce DNA sequencing errors and slow the growth of algae. PH Effects at Night.

At night, no photosynthesis takes place, so algae stops taking in carbon dioxide from water and goes into a respiratory stage this respiratory stage, algae consume oxygen that was produced during photosynthesis and release carbon dioxide into the water increased production of carbon dioxide decreases the pH levels in the water at night.

Aquarium UVs will clear up stubborn algae blooms in freshwater, marine and reef aquariums in a matter of days. UV units have no effect on algae that is already growing on the glass or live rock.

Some aquarists worry that UV will eliminate the natural plankton population in their tanks. Based on the wealth of research it is safe to say that. SUMMARY. The effects of photosynthetically active radiation (PAR) and temperature on the photosynthesis of two Vietnamese brown algae, Sargassum mcclurei and S.

oligocystum (Fucales), were determined by field and laboratory measurements. Dissolved oxygen sensors and pulse‐amplitude modulated (PAM) fluorometry were used for the measurements of photosynthetic efficiency. Ultraviolet-B (UVB) radiation is a global stressor that has profound impacts on freshwater and marine ecosystems.

However, an analysis of the patterns of sensitivity to UVB radiation across aquatic photosynthetic organisms has not yet been published. Here, we performed a meta-analysis on results reported in studies compiled from the published literature to quantify and compare the.

The main objectives were to quantify the effects on photosynthetic rates and pigmentation of short-term (4-hour) and long-term (hour) exposures of Antarctic phytoplankton to different levels of UV radiation.

Phytoplankton and ice algae were exposed to four levels of UV radiation in outdoor incubation chambers: near ambient UV; UV enhanced by. Algal studies remain necessary for risk assessment and their utility in ecotoxicology is the evaluation of lethal and sub-lethal toxic effects of potential toxicants on inhabitants of several ecosystems.

Effects on algal photosynthetic apparatus caused by various chemical species have been extensively studied. The present chapter summarizes the published data concerning the toxicity of. The effect of light intensity on photosynthesis of the algal mats was studied using neutral density filters during incubation with 14 CO 2.

Despite the intense sunlight at the altitude of Yellowstone, light inhibition by full sunlight was observed only occasionally; the rate of photosynthesis fell progressively with decreasing light, although. EFFECTS OF UV RADIATION ON ANTARCTIC BENTHIC ALGAE –WITH EMPHASIS ON EARLY SUCCESSIONAL STAGES AND COMMUNITIESPhD thesis Katharina Zacher University of BremenGermany, ALFRED WEGENER INSITUT FÜR POLAR- UND MEERESFORSCHUNG BREMERHAVENEFFECTS OF UV RADIATION ON ANTARCTIC BENTHIC ALGAE – WITH.

Effects of Ultraviolet Radiation on Antarctic Marine Phytoplankton Photosynthesis With Particular Attention to the Influence Of Mixing E.

Walter Helbling Polar Research Program, Scripps Institution of Oceanography, University Of California, San Diego, La Jolla, California,   Algae are eukaryotic organisms that have characteristics of both plants and animals.

Like animals, algae are capable of feeding on organic material in their environment. Some algae also contain organelles and structures found in animals cells, such as flagella and centrioles.

Like plants, algae contain photosynthetic organelles called chloroplasts. The effects of continuous light and light intensity on the reproduction rates of twenty-two species of marine phytoplankton L.

Brand and R. Guillard Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MAU.S.A. Available online 1 April Abstract. The rates of photosynthesis and dark respiration for 7 marine algae and 1 fresh-water alga were measured and compared. The dinoflagellates Glenodinium sp.

and zooxanthellae have high dark respiration rates relative to photosynthetic rates, which may decrease their net growth rates. Photorespiration in the 8 algal species was studied by examining the effects of the concentration of.

Effect of natural ultraviolet radiation on photosynthesis It is well known that natural ultraviolet radiation is more intense at higher alti- tudes (Gates ). The study area in Yellowstone where our experiments were done is at an altitude of 2, m, the water level over the algal mats is only Short-Term Responses of Some Planktonic Crustacea Exposed to Enhanced UV-B Radiation.- Review of Literature Concerning the Impact of UV-B Radiation Upon Marine Organisms.- Assessment of Effects of UV Radiation on Marine Fish Larvae.- The Effect of UV-B Irradiation on the Integument of the Marine Flatfish Pleuronectes Platessa L DURING the Swedish Deep-Sea Expedition with the Albatross, measurements of sub-surface radiation were carried out in different areas, chiefly by means of photo-electric methods.

Special attention. Mark Schonbeck, Trevor A. Norton, The effects of brief periodic submergence on intertidal fucoid algae, Estuarine and Coastal Marine Science, /(79), 8, 3, (), (). Crossref. So, although there is evidence for planktonic cyanobacteria in early marine environments from Ga or earl23,24, the means by which they overcame Archean UV radiation .This book deals with the physical and chemical properties found in algae of different types (blue-green, red, golden-brown, yellow-green, brown and green).

Methods used for extracting and purifying the pigments and their value in classifying the various types of algae are discussed in detail. This book contains detailed tables of the physical properties of the pigments (absorption and 3/5(1).Photosynthetic microalgae play an important role in solar-to-chemical energy conversion on Earth, but the increasing solar ultraviolet (UV) radiation seriously reduces the biological photosynthesis.

Here, we developed a one-step approach to construct cell-in-shell hybrid structure by using direct adsorption of CeO2 nanoparticles onto cells. The engineered CeO2 nanoshell can efficiently protect.