2 edition of Effect of nitrogen starvation and the role of carboxysomes in four species of Oscillatoria (Cyanophyceae). found in the catalog.
Effect of nitrogen starvation and the role of carboxysomes in four species of Oscillatoria (Cyanophyceae).
Robert David Bailie
Thesis (M. Sc. (Contemporary Biological Sciences)) - University of Ulster, 1993.
Carbon and nitrogen metabolism pathways are regulated by complex mechanisms in order to optimize growth and development of plants. This study was conducted to contribute to the determination of roles of some key enzymes of carbon and nitrogen metabolism in sorghum roots. Sorghum were grown under nitrate (NO 3 -), ammonium (NH 4+) or nitrate Cited by: 1. Cultivation of the cells in nitrogen-deficient medium caused a significant reduction of the adhesion to soil particles by all the four strains. Nitrogen starvation also reduced significantly the strength of cell adhesion to the soil particles, except for Klebsiella sp. LBBMA Two of the four strains showed significant reduction in cell.
Start studying Carbon and Nitrogen fixation in microbes. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. Carboxysomes. store molecules of Rubisco, found in autotrophic organisms that use the Calvin cycle for CO2 fixation Aerobic nitrogen-fixing bacteria prevent the oxygen needed for respiration. role of N in HAB formation and bloom toxicity. Nitrogen dynamics in aquatic systems play a role in understanding HAB biomass trends and potential toxicity. For example, in lab tests both Microcystis and Planktothrix (the species of cyanobacteria that make File Size: KB.
Nitrogen starvation caused a reduction of the coefficient of strong adhesion to soil particles (Kd2) in the four bacterial strains. Significant change of the coefficient of weak adhesion, however, was observed only with Arthrobacter aurescens LBBMA 98 (Table 1). Nitrogen deficiency can be prevented in the short term by using grass mowings as a mulch, or foliar feeding with manure, and in the longer term by building up levels of organic matter in the soil. Sowing green manure crops such as grazing rye to cover soil over the winter will help to prevent nitrogen leaching, while leguminous green manures such as winter tares will fix additional nitrogen from the .
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Nitrogen starvation was accomplished by centrifugation of the biomass and re-suspension in medium lacking a nitrogen source. In this way, it was possible to identify four promising strains that were able to accumulate more than 35% TAG (% of dry weight).Cited by: Nitrogen and carbon stable isotopic compositions (δ 15 N and δ 13 C) of consumers have been used for physiological and food web us studies have shown δ 15 N and δ 13 C values are affected by several biological and environmental factors during starvation, but the generality of the effect of starvation on δ 15 N and δ 13 C values has not yet been by: The effects of nitrogen starvation on the morphology and ultrastructure of the branching, filamentous cyanobacterium Mastigocladus laminosus were examined with light and electron microscopy.
In H. pluvialis, the first response to nitrogen starvation was intensive production of carbohydrates, accumulating to up to 63% of dry weight by day 1; on day 2, the total carbohydrate content.
Effect of different nitrogen and carbon sources and their concentrations in liquid media on the mycelial growth of six different ectomycorrhizal (ECM) fungal species was studied. Differences were found in the utilization of the different nitrogen and carbon sources between the fungal by: 8.
Microalgal triacylglycerol (TAG), a promising source of biofuel, is induced upon nitrogen starvation (−N), but the proteins and genes involved in this process are poorly by: Starvation effects on nitrogen and carbon stable isotopes of animals: An insight from meta-analysis of fasting experiments.
The longer a consumer is affected by starvation, the more the. Nitrogen is one of the most important nutrients needed for plants and algae to survive, and the photosynthetic ability of algae is related to nitrogen abundance.
Red algae are unique Cited by: This paper focuses on the role of nitrogen- and storage-affected carbohydrate availability in cutting survival and adventitious root formation under low light conditions. A greenhouse experiment was carried out in order to examine the effects of a graduated nitrogen supply to Cited by: Cyanobacteria is a _____ bacteria found in freshwaters, oceans, and wetlands, and on the surfaces of arid soils.
Photosynthetic An ancestor of the cyanobacteria gave rise to. the effect of N-deficiency on the chlorophyll concentra tion and carbon diffusion is less pronounced than that on rubisco, the decrease in the rate of photosynthesis occurs primarily due to the low activity of the latter (Mae ).
In many plant species, several studies have confirmed the adverse effect of a low nitrogen content. RNA-Seq analysis of N-deficiency stress-responsive genes. Through microarray analyses, early-responsive genes have been detected in rice roots but not in leaves when sampled after 20 min, 1 h, and 2 h of N-starvation [20,22].Cai et al.
have monitored such genes after long-term (1- and 7-d) treatments with limited-N . To identify additional responsive genes, we transferred rice seedlings at Cited by: What is the only form of nitrogen that Non Legume plants can take in and use.
Making nitrates in the soil into the atmosphere. If the number of the nitrifying bacteria decreased, what effect would this have on the nitrogen cycle and what type of compounds would accumulate as a result.
Nitrogen cycle would slow down and would be less efficient. Nitrogen and carbon stable isotopic compositions (δ 15 N and δ 13 C) of consumers have been used for physiological and food web studies. Previous studies have shown δ 15 N and δ 13 C values are affected by several biological and environmental factors during starvation, but the generality of the effect of starvation on δ15N and δ13C values has not yet been by: Additionally, the GS-MS analysis indicated an increase in C16 content after 30 days of N starvation (Fig.
Although the N-starved Oscillatoria willei BDU showed modifications in the. In book: Advances in Biology and Ecology of Nitrogen Fixation, Chapter: Nitrogen Fixing Cyanobacteria: Future Prospect, Publisher: InTech, Editors:.
Introduction. Eutrophication is a natural process concerning all habitats, and becomes more serious with the increasing input of nitrogen (N) and phosphorus (P) mainly caused by human activities (Cloern, ).In eutrophic water bodies, there are multiform N nutrients including inorganic and organic N, due to the diversity of sources from tremendous volume of agricultural, breeding, urban Cited by: 8.
The present study demonstrates the capability of a non-nitrogen-fixer to withstand nitrogen stress making it an ecologically successful organism in the marine environment. The above pleiotropic effects of nitrogen deficiency also demonstrate that nitrogen plays a crucial role in growth and metabolism of marine by: Of the four major macromolecules in biological systems, both proteins and nucleic acids contain nitrogen.
During the catabolism, or breakdown, of nitrogen-containing macromolecules, carbon, hydrogen, and oxygen are extracted and stored in the form of carbohydrates and fats. Excess nitrogen is excreted from the : Charles Molnar, Jane Gair, Molnar, Charles, Gair, Jane.
Fungi occupy diverse environments where they are constantly challenged by stressors such as extreme pH, temperature, UV exposure, and nutrient deprivation. Nitrogen is an essential requirement for growth, and the ability to metabolize a wide variety of nitrogen sources enables fungi to colonize different environmental niches and survive nutrient by:.
Exclusion of combined nitrogen (NaNO 3) from the growth medium caused certain changes in metabolic processes leading to cessation in growth of the non-heterocystous, non nitrogen-fixing marine cyanobacterium Oscillatoria willei BDU But antioxidative enzymes, namely superoxide dismutase and peroxidase, helped the organism to survive the nitrogen by: Non-metal nitrogen consists of five electrons in its outermost shell, thereby forming triple bonds in most compounds.
Thus, a triple bond is formed between two nitrogen atoms to form a molecule. Percentage in the Atmosphere. As compared to oxygen, nitrogen is four times more abundant in the Earth’s atmosphere (%).A.J.
Czaja, in Handbook of Systemic Autoimmune Diseases, Nitrosative Stress. Reactive nitrogen species (RNS) that are overproduced or undereliminated cause nitrosative stress , and the consequences of nitrosative stress can include mitochondrial dysfunction, altered structure and function of critical protein mediators, and cell injury or death [,].