pathological effect of high concentration of oxygen on plant
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pathological effect of high concentration of oxygen on plant

Effect of High Oxygen Concentration on Photosynthesis in ...

Dec 01, 1982  The effect of high O 2 concentration on photosynthetic 14 CO 12 assimilation and its 14 C-products in leaves of low temperature pretreated (cold-acclimated) rape plants was studied. The inhibition of photosynthesis (Warburg effect) and modification in photosynthetic carbon metabolism caused by O 2 were found to be less pronounced in the low temperature pretreated than in the control plants.

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Effect of high consentrated dissolved oxygen on the plant ...

Jan 01, 2010  In this study, the effect of high concentrated dissolved oxygen (20-30mg/l) on the lettuce plant growth in a deep hydroponic culture under a low greenhouse temperature is investigated using an oxygen enricher (Ehime Sanso, OD110) and a pure high-pressured oxygen gas (95% O2).

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Effect of oxygen concentration on plant growth ...

高达10%返现  Tomato plants were grown under either a high (11-14%; Air treatment), a moderate (5.8-7%; Control) or a low (0.8-1.5%; Nitrogen treatment) oxygen concentration and inoculated or not with the pathogen. The high oxygen treatment resulted in a marked increase in plant growth, as measured by shoot and root weights.

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Effect of high consentrated dissolved oxygen on the plant ...

Journal of Plant Pathology, ... in which the growth of leaves and roots in lettuce and tomato plants increased as the concentration of ... the effect of high concentrated dissolved oxygen on the ...

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The Effect of Oxygen Concentration on Photosynthesis in ...

The inhibition increases with oxygen concentration and is about 30% in an atmosphere of 21% O 2 and 0.03% Co. 2. Undoubtedly, therefore, oxygen in normal air exerts a strong inhibitory effect on photosynthetic Co 2 fixation of land plants under natural conditions. The inhibitory effect of oxygen is rapidly produced and fully reversible.

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the biological effect of high concentration of oxygen on plant

the ability to efficiently operate at high dissolved oxygen concentration and high MLSS level, provide specific economic and operational advantages of the HPOBNR System. Operating data will be presented from several high purity oxygen nutrient removal plants and provide a comparison of current generation design approach versus effluent. Get Price

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Limitations of oxygen delivery to cells in culture: An ...

Molecular oxygen is one of the most important variables in modern cell culture systems. Fluctuations in its concentration can affect cell growth, differentiation, signaling, and free radical production. In order to maintain culture viability, experimental validity, and reproducibility, it is imperat

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Variation in dissolved oxygen concentration and its effect ...

concentrations are required. Conventionally the dissolved oxygen (DO) concentration is kept higher than 2 mg/l to avoid depletion of oxygen. In many plants DO concentrationis kept even higher to ensure good effluent quality since it has previously been shown that this has positive influence on the floc formation (Wilén and Balmér, 1999).

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(PDF) Inhibitory effect of oxygen accumulation on the ...

The growth of Spirulina platensis was studied in a light-limited culture under various dissolved oxygen (DO) concentrations. At high DO concentration, e.g. at 1.25 mM DO, the growth rate was ...

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Reactive Oxygen Species, Oxidative Damage, and ...

Reactive oxygen species (ROS) are produced as a normal product of plant cellular metabolism. Various environmental stresses lead to excessive production of ROS causing progressive oxidative damage and ultimately cell death. Despite their destructive activity, they are well-described second messengers in a variety of cellular processes, including conferment of tolerance to various environmental ...

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The Effect of Oxygen Concentration on Photosynthesis in ...

The inhibition increases with oxygen concentration and is about 30% in an atmosphere of 21% O 2 and 0.03% Co. 2. Undoubtedly, therefore, oxygen in normal air exerts a strong inhibitory effect on photosynthetic Co 2 fixation of land plants under natural conditions. The inhibitory effect of oxygen

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Oxygen metabolism in plant cell culture/bacteria ...

Dec 01, 1997  Preliminary studies with plant cell suspensions indicated that high concentrations of bacterial inoculum can significantly reduce the H 2 O 2 levels detected immediately following inoculation. Further investigation suggested that bacterial concentration is an important factor in H 2 O 2-scavenging, and is often overlooked in both plant/pathogen interactions as well asin vitrosurvival studies.

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Ozone effects on plants : USDA ARS

The type and severity of injury is dependent on several factors including duration and concentration of ozone exposure, weather conditions and plant genetics. One or all of these symptoms can occur on some species under some conditions, and specific symptoms

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Reactive Oxygen Species, Oxidative Damage, and ...

Reactive oxygen species (ROS) are produced as a normal product of plant cellular metabolism. Various environmental stresses lead to excessive production of ROS causing progressive oxidative damage and ultimately cell death. Despite their destructive activity, they are well-described second messengers in a variety of cellular processes, including conferment of tolerance to various environmental ...

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Effect of high oxygen atmospheres on fruit decay and ...

May 01, 2008  The effects of high oxygen atmospheres on postharvest decay and quality of Chinese bayberry (Myrica rubra Seib Zucc. cv. Wumei), strawberry (Fragaria ananassa Duch. cv. Fengxiang) and blueberry (Vaccinium corymbosum L. cv. Duke) fruit were assessed.Freshly harvested Chinese bayberries, strawberries and blueberries were placed in jars continuously ventilated with air or with

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Physiological Diseases in Plants: 8 Factors Plant Pathology

It is because the water logging causes oxygen deficiency to roots while the high temperature increases oxygen demand by the plant creating its deficiency in roots. These effects together create extreme oxygen scarcity in roots and, as a result, they collapse and die, Blackheart of

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How does an increase in oxygen concentration in mesophyll ...

During the catalysis by RuBisCO, an 'activated' intermediate is formed (an enediol intermediate) in the RuBisCO active site. This intermediate is able to react with either CO2 or O2. It has been demonstrated that the specific shape of the RuBisCO ...

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Studies on the alterations in haematological indices ...

The present study was conducted to assess the toxicity of thermal power plant effluent containing heavy metals (Fe > Cu > Zn > Mn > Ni > Co > Cr) on haematological indices, micronuclei, lobed nuclei and activity of pathological marker enzymes [alkaline phosphatase (ALP), aspartate transferase (AST), alanine transferase (ALT) and creatine kinase (CK)] in Channa punctatus. Total erythrocyte ...

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Effects of High Temperature and Dissolved Oxygen ...

Effects of High Temperature and Dissolved Oxygen Concentration on the Development of Cryptocaryon irritans (Ciliophora) with a Comment on the Autumn Outbreaks of Cryptocaryoniasis.

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The Direct and Indirect Effects of Increased Carbon ...

The direct effects of increased carbon dioxide (CO 2) on plant growth refers to the change in plant grow with the levels of temperature, precipitation, evaporation and growing season at their present values.The indirect effects include the results of any changes in the other variables which affect plant growth that come as a result of the effect of increased CO 2 on global climate.

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Effect of oxygen concentration on plant growth, lipid ...

Mar 01, 1997  Tomato plants were grown under either a high (11-14%; Air treatment), a moderate (5.8-7%; Control) or a low (0.8-1.5%; Nitrogen treatment) oxygen concentration and inoculated or not with the pathogen. The high oxygen treatment resulted in a marked increase in plant growth, as measured by shoot and root weights.

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(PDF) Water Stress in Plants: Causes, Effects and Responses

However, the total marketable yield ranged from 2.02 to 6.8 kg plant−1 in sandy loam soil and 1.75 to 5.4 kg plant−1 in silty loam soil from a low to high CWSIW.

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Negative Air Ions and Their Effects on Human Health and ...

Sep 28, 2018  3. Negative Air Ions and Their Generation. Air ions are electrically charged molecules or atoms in the atmosphere [].An air ion is formed when a gaseous molecule or atom receives sufficiently high energy to eject an electron [].NAIs are those that gain

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8 Harmful Effects of Water Pollutants – Explained!

Thus high levels of BOD can deplete the oxygen in water. Near the point of organic discharge, the bacterial population rapidly increases with active growth of sewage fungus (Fig. 6.9). Protozoa species that feed on bacteria increase in numbers, but the oxygen depletion causes a decrease of algae and clean water fauna.

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Effect of oxygen concentration on plant growth, lipid ...

Mar 01, 1997  Tomato plants were grown under either a high (11-14%; Air treatment), a moderate (5.8-7%; Control) or a low (0.8-1.5%; Nitrogen treatment) oxygen concentration and inoculated or not with the pathogen. The high oxygen treatment resulted in a marked increase in plant

Read More
Oxygen metabolism in plant cell culture/bacteria ...

Dec 01, 1997  Preliminary studies with plant cell suspensions indicated that high concentrations of bacterial inoculum can significantly reduce the H 2 O 2 levels detected immediately following inoculation. Further investigation suggested that bacterial concentration is an important factor in H 2 O 2-scavenging, and is often overlooked in both plant/pathogen interactions as well asin vitrosurvival studies.

Read More
Effects of superatmospheric oxygen levels on postharvest ...

Aug 01, 2000  Exposure to superatmospheric O 2 concentration may stimulate, have no effect, or reduce rates of respiration and ethylene production, depending on the commodity, maturity and ripeness stage, O 2 concentration, storage time and temperature, and concentrations of CO 2 and C 2 H 4 present in the atmosphere. In some plant organs, cyanide-resistant respiration is enhanced by elevated O 2 atmospheres.

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Effects of Oxygen, Carbon Dioxide, and Ethylene on Growth ...

increased to a maximum (85%) at 21% 02 concentration (Fig. 1). RESULTS Sclerotial germination was high at low CO2 levels, but increase from .03% CO2 (normal air) to 20.2% CO2 while 02 was kept at near Effect of 02 on radial growth and sclerotial production. At 1% constant level of 21% resulted in a progressive decrease in

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Soil Aeration and Tree Health: Correlating Soil Oxygen

oxygen concentration. Oxygen levels between 0 percent (pure nitrogen) and 21 percent (air) were tested. Following a five day incubation period, rhizotrons were removed and the roots retraced. Treatment effects were determined by calculating the amount of root growth which occurred during the various oxygen treatments

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Dissolved Oxygen and Water - USGS.gov

Oct 22, 2019  Dissolved oxygen, temperature, and aquatic life. Water temperture affects dissolved-oxygen concentrations in a river or water body. As the chart shows, the concentration of dissolved oxygen in surface water is affected by temperature and has both a seasonal and a daily cycle. Cold water can hold more dissolved oxygen than warm water.

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High CO2 levels cause plants to thicken their leaves ...

Oct 01, 2018  In addition to a weakening plant carbon sink, the simulations run by Swann and Marlies Kovenock, a UW doctoral student in biology, indicated that global temperatures could rise an extra 0.3 to 1.4 degrees Celsius beyond what has already been projected to occur by scientists studying climate change. “If this single trait — leaf thickness — in high carbon dioxide levels has such a ...

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Dissolved Oxygen AquaPlant: Management of Pond Plants ...

The dissolved oxygen concentration in the mix can be too low to support life in the pond. Both fish and plankton can die from low dissolved oxygen following a turnover. A turnover takes place only if the surface water is cooled quickly so that it is close to the temperature of the deep water, allowing them to mix.

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The Oxygen Transfer Capacity of Submerged Plant Elodea ...

May 15, 2019  There are insufficient data for the development of process design criteria for constructed wetlands systems based on submerged plants as a major treatment agent. The aim of the study was to evaluate the oxygen transfer capacity (OTC) of E. densa, in relation to wet plants’ mass (w.m.), and the influence of E. densa on the oxygen concentration and contaminantsrsquo; removal efficiency from ...

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8 Harmful Effects of Water Pollutants – Explained!

Thus high levels of BOD can deplete the oxygen in water. Near the point of organic discharge, the bacterial population rapidly increases with active growth of sewage fungus (Fig. 6.9). Protozoa species that feed on bacteria increase in numbers, but the oxygen depletion causes a decrease of algae and clean water fauna.

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Oxygen toxicity - Wikipedia

Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen (O 2) at increased partial pressures.Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs, and eyes.Historically, the central nervous system condition was called the Paul Bert effect, and the pulmonary condition the Lorrain Smith effect ...

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(PDF) Factors contribution to oxygen concentration in ...

Nov 21, 2018  Previous studies have suggested that the relative oxygen concentration (ROC) in the near-ground air shows no obvious changes at different altitudes. ... is a pathological effect of high altitude ...

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The Cardiovascular Effects of Marijuana: Are the Potential ...

Marijuana is derived from the hemp plant Cannabis sativa, with the biologically active ingredient being a group of cannabinoids and the main psychoactive constituent being 9-tetrahydrocannabinol (THC).2–4 The THC ligand binds to multiple receptors with especially high selectivity for the Cannabinoid 1 and 2 receptors (CB1 and CB2, respectively). ). CB1 receptors are predominantly expressed ...

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The Effect of Oxygen on the Radiosensitivity of Mammalian ...

The effect of oxygen concentration on the radiosensitivity of cells has been extensively investigated in bacteria, plants, and lower animals (1,2). Nearly all the biological materials studied have shown that, as oxygen concentration is increased from anoxia to that of air, there is a sharp, approximately threefold, increase in radiosensitivity; but sensitivity is little enhanced, if at all ...

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