Oxidative stress response of a recombinant Aspergillus niger to exogenous menadione and H2O2 addition

Kreiner, M.; Harvey, Linda M.; McNeil, Brian

doi:10.1016/s0141-0229(01)00517-8

Cited by 56 publications

(21 citation statements)

References 23 publications

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“…Previous studies have demonstrated that soluble sugars and proteins excreted by plant are also main substances for the osmotic regulation and the protection of stable cell membrane structure under diverse stress conditions, which is beneficial to maintain normal turgor pressure and avoid serious dewatering for cell metabolism (Zhang et al, 2007). Normally, the generation and erasion of reactive oxygen species remains balanced in plant cell; however, the balanced system was disturbed in adversity stress (Kreiner et al, 2002;McDonald and Vanlerberghe, 2005). Thus the enhancement of the amount of reactive oxygen species certainly results in lipid peroxidation with MDA as terminal products, accompanied by the injury of cell membrane structure and function (Apel and Hirt, 2004;Volkov et al, 2006;Hu et al, 2008).…”

Section: Effects Of Hat On Physiological Parameters Of Rice Flag Leavesmentioning

confidence: 99%

Effects of elevated air temperature on physiological characteristics of flag leaves and grain yield in rice

Liu

Tian

et al. 2013

Chilean J. Agric. Res.

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1As an indispensable environment element for crop growth, air temperature has brought challenge for the sustainable development of rice (Oryza sativa L.) production. Elevated air temperature led to great loss in rice grain yield in many districts suffering from heat stress due to the greenhouse effect worldwide, which has received more and more attention from researchers. A field experiment was conducted to investigate impacts of high air temperature (HAT) after rice heading stage on dynamics of SPAD values, soluble sugar, soluble protein, and malondialdehyde (MDA) contents of flag leaves, and grain yield attributes. The results showed that HAT significantly reduced SPAD values, soluble sugar and protein contents, seed-setting rate, number of filled grains per panicles, 1000-grain weight, and grain yield, while increased MDA content. There exists strong correlation between each physiological parameter and days from heading stage to maturity, which can be simulated by quadratic curve equation or linear regression equation. Under HAT, the enhanced MDA content and decreased soluble sugar content demonstrated the damage of membrane structure and photosynthesis function of rice flag leaves, which was partially attributed to the reduced SPAD value and soluble protein content. In the present experiment, rice seed-setting rate was more vulnerable to HAT than grain weight. The disturbance of physiological metabolism in flag leaves was a fundamental reason for the reduction of rice grain yield under HAT.

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Section: Effects Of Hat On Physiological Parameters Of Rice Flag Leavesmentioning

confidence: 99%

Effects of elevated air temperature on physiological characteristics of flag leaves and grain yield in rice

Liu

Tian

et al. 2013

Chilean J. Agric. Res.

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“…Although these compounds are toxic to cell life, the survival of microorganisms in clouds strongly suggests that cloud-borne microorganisms can resist the high concentrations that are found in the atmosphere. This result is likely to be because of the efficient, antioxidative stress metabolism that involves specialized enzymes (such as catalases, peroxidases, and superoxide dismutase) and nonenzymatic compounds (30,31).…”

mentioning

confidence: 99%

Potential impact of microbial activity on the oxidant capacity and organic carbon budget in clouds

Vaïtilingom

Deguillaume

Vinatier

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

162

179

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Within cloud water, microorganisms are metabolically active and, thus, are expected to contribute to the atmospheric chemistry. This article investigates the interactions between microorganisms and the reactive oxygenated species that are present in cloud water because these chemical compounds drive the oxidant capacity of the cloud system. Real cloud water samples with contrasting features (marine, continental, and urban) were taken from the puy de Dôme mountain (France). The samples exhibited a high microbial biodiversity and complex chemical composition. The media were incubated in the dark and subjected to UV radiation in specifically designed photo-bioreactors. The concentrations of H 2 O 2 , organic compounds, and the ATP/ADP ratio were monitored during the incubation period. The microorganisms remained metabolically active in the presence of • OH radicals that were photoproduced from H 2 O 2 . This oxidant and major carbon compounds (formaldehyde and carboxylic acids) were biodegraded by the endogenous microflora. This work suggests that microorganisms could play a double role in atmospheric chemistry; first, they could directly metabolize organic carbon species, and second, they could reduce the available source of radicals through their oxidative metabolism. Consequently, molecules such as H 2 O 2 would no longer be available for photochemical or other chemical reactions, which would decrease the cloud oxidant capacity.biodegradation | cloud chemistry T he cloud system is an ideal medium for the development of complex multiphase chemistry, in which chemical species from the gas, solid, and aqueous phases are transformed. This process perturbs the homogeneous gas phase chemistry through the dissolution of various chemical compounds that undergo efficient photochemical processing. During a cloud's lifetime, cloud chemistry can lead to the formation of new, low volatile compounds, such as organic and inorganic acids, that modify the physical and chemical properties of aerosols after cloud evaporation and can also contribute to the formation of secondary aerosols (1, 2). The formation of clouds is, consequently, modified, and this process remains one of the major uncertainties in climate models that assess the earth's radiative balance (3).Within this framework, the presence of free radicals and oxidants in the cloud system leads to aqueous phase oxidations, transforming both inorganic and organic compounds. Cloud chemistry models predict that the • OH radicals represent the most important oxidant in the cloud aqueous phase (4). This oxidant can either be transferred from the gas phase or produced in situ in the aqueous phase through photochemical processes or related reactions with hydrogen peroxide and transition metal ions, such as iron (5). Multiple other oxidants that are produced in clouds can also oxidize chemicals, and these oxidation processes must be better understood because they impact atmospheric chemical cycles and radiation. Indeed, the resulting aerosols increase or decrease the scattering a...

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“…Oxygen is potentially toxic to all organisms because metabolism and environmental stresses generate ROS from the oxygen. Under normal physiological conditions, the toxic effects of ROS are minimized by enzymatic and non-enzymatic antioxidants (Kreiner et al, 2002). Under stress conditions, oxidant levels overwhelm the antioxidant levels leading to cell damage (Kreiner et al, 2002).…”

Section: Plant Growth Regulatorsmentioning

confidence: 99%

“…Under normal physiological conditions, the toxic effects of ROS are minimized by enzymatic and non-enzymatic antioxidants (Kreiner et al, 2002). Under stress conditions, oxidant levels overwhelm the antioxidant levels leading to cell damage (Kreiner et al, 2002). Plants exposed to environmental stress, such as heat, cold, drought and salinity produce ROS, which damage macromolecules and cell membranes (Zhang & Kirkham, 1996).…”

Section: Plant Growth Regulatorsmentioning

confidence: 99%

Effects of High Night Temperature on Crop Physiology and Productivity: Plant Growth Regulators Provide a Management Option

Mohammed¹,

Tarpley²

2011

Global Warming Impacts - Case Studies on the Economy, Human Health, and on Urban and Natural Environments

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Oxidative stress response of a recombinant Aspergillus niger to exogenous menadione and H2O2 addition

Cited by 56 publications

References 23 publications

Effects of elevated air temperature on physiological characteristics of flag leaves and grain yield in rice

Effects of elevated air temperature on physiological characteristics of flag leaves and grain yield in rice

Potential impact of microbial activity on the oxidant capacity and organic carbon budget in clouds

Effects of High Night Temperature on Crop Physiology and Productivity: Plant Growth Regulators Provide a Management Option

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