Physiological and biochemical responses to acute ozone-induced oxidative stress in Medicago truncatula

Puckette, Michael; Weng, Hua; Mahalingam, Ramamurthy

doi:10.1016/j.plaphy.2006.12.004

Cited by 113 publications

(62 citation statements)

References 48 publications

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“…Lipid peroxidation was measured using a modified thiobarbituric acid (TBA) method (Puckette et al 2007). The specific absorbance of extracts was recorded at 532 nm.…”

Section: Analysis Of Lipid Peroxidationmentioning

confidence: 99%

Differential antioxidation activities in two alfalfa cultivars under chilling stress

Wang

Kim

Lee

et al. 2009

Plant Biotechnol Rep

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To understand the adaptability of alfalfa (Medicago sativa L.) to chilling stress, we analyzed the antioxidative mechanism during seed germination. The germination rates of six alfalfa cultivars were studied comparatively at 10°C. Xinmu No. 1 and Northstar were selected as chilling stress-tolerant and stress-sensitive cultivars for further characterization. After chilling treatment, Xinmu No. 1 showed higher seedling growth than Northstar. Xinmu No. 1 exhibited low levels of hydrogen peroxide and lipid peroxidation compared with Northstar. In addition, shoots in Xinmu No. 1 treated with chilling showed higher activities of the superoxide dismutase, ascorbate peroxidase (APX), and catalase than those of Northstar, whereas Xinmu No. 1 showed higher APX activity in roots that Northstar. These results indicated that high antioxidation activity in Xinmu No. 1 under chilling stress is well associated with tolerance to chilling condition during germination.

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“…Lipid peroxidation was measured using a modified thiobarbituric acid (TBA) method (Puckette et al 2007). The specific absorbance of extracts was recorded at 532 nm.…”

Section: Analysis Of Lipid Peroxidationmentioning

confidence: 99%

Differential antioxidation activities in two alfalfa cultivars under chilling stress

Wang

Kim

Lee

et al. 2009

Plant Biotechnol Rep

View full text Add to dashboard Cite

show abstract

“…Both enzymes catalyze reactions that maintain the large pool of GSH and AA, and are essential for the appropriate functioning of the antioxidant system in plants (Davenport et al 2003). The activities of antioxidant enzymes such as APX, CAT and SOD are upregulated in response to several abiotic stresses such as drought Jaleel et al 2007aJaleel et al , b, c, 2008aManivannan et al 2007Manivannan et al , 2008a, salinity (Jaleel et al 2007d(Jaleel et al , e, f, g, 2008bManivannan et al 2008b), ozone (Puckette et al 2007), SO 2 , UV-B (Rajendiran and Ramanujam 2004) and temperature (Ali et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Antioxidant defense responses: physiological plasticity in higher plants under abiotic constraints

et al. 2009

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Environmental stresses (salinity, drought, heat/ cold, light and other hostile conditions) may trigger in plants oxidative stress, generating the formation of reactive oxygen species (ROS). These species are partially reduced or activated derivatives of oxygen, comprising both free radical ðO ÁÀ 2 ; OHÁ; OH 2 ÁÞ and non-radical (H 2 O 2 ) forms, leading to cellular damage, metabolic disorders and senescence processes. In order to overcome oxidative stress, plants have developed two main antioxidants defense mechanisms that can be classified as non-enzymatic and enzymatic systems. The first class (non-enzymatic) consists of small molecules such as vitamin (A, C and E), glutathione, carotenoids and phenolics that can react directly with the ROS by scavenging them. Second class is represented by enzymes among them superoxide dismutase, peroxidase and catalase which have the capacity to eliminate superoxide and hydrogen peroxide. In this review, we have tried to explore the related works, which have revealed the changes in the basic antioxidant metabolism of plants under various abiotic constraints.

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“…At the physiological level, establishment of an anti-oxidative system is one of the important strategies for plant adaptation to heavy metal stress. Heavy metal-triggered oxidative stress can give rise to the increased activities of antioxidant enzymes like SOD, POD or APX, all of which reflect not only the degree of toxicity but the ability to tolerate the stress as well Puckette et al 2007;Zhou et al 2007). Moreover, non-enzymatic defense systems (e.g.…”

Section: Introductionmentioning

confidence: 99%

Mercury-induced oxidative stress and impact on antioxidant enzymes in Chlamydomonas reinhardtii

et al. 2010

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Investigation of mercury toxicology in green algae is of great importance from ecological point of view, because mercury has become a major contaminant in recent years. In higher plants, accumulation of mercury modifies many aspects of cellular functions. However, the process that mercury exerts detrimental effects on green algae is largely unknown. In this study, we performed an experiment focusing on the biological responses of Chlamydomonas reinhardtii, a unicellular model organism, to Hg(2+)-induced toxicity. C. reinhardtii was exposed to 0, 1, 2, 4, 6, and 8 μM Hg in media. Concentrations of Hg were negatively correlated with the cell growth. Treatment with Hg induced accumulation of reactive oxygen species and peroxidative products. Endogenous proline levels increased in Hg-exposed algae. Hg exposure activated superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX). To get insights into the molecular response, a RT-PCR-based assay was performed to analyze the transcript abundance of Mn-SOD, CAT and APX. Our analysis revealed that expression of the genes was up-regulated by Hg exposure, with a pattern similar to the enzyme activities. Additional investigation was undertaken on the effect of Hg on the transcript amount of ∆(1)-pyrroline-5-carboxylate synthetase, a key enzyme of proline biosynthesis and on that of heme oxygenase-1 (HO-1), an enzyme regulating heavy metal tolerance. Expressions of both P5CS and HO-1 were up-regulated by Hg. These data indicate that Hg-induced oxidative stress was responsible for the disturbance of the growth and antioxidant defensive systems in C. reinhardtii.

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Physiological and biochemical responses to acute ozone-induced oxidative stress in Medicago truncatula

Cited by 113 publications

References 48 publications

Differential antioxidation activities in two alfalfa cultivars under chilling stress

Differential antioxidation activities in two alfalfa cultivars under chilling stress

Antioxidant defense responses: physiological plasticity in higher plants under abiotic constraints

Mercury-induced oxidative stress and impact on antioxidant enzymes in Chlamydomonas reinhardtii

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