Reactive Oxygen Species in Plant Development and Pathogen Defence

Jones, Mark; Smirnoff, Nicholas

doi:10.1002/9780470988565.ch8

Cited by 5 publications

(5 citation statements)

References 134 publications

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“…A number of reports indicate that oxidative stress induces an increase in the responses of enzymatic systems linked to ROS-scavenging process (Apel and Hirt, 2004;Jones and Smirnoff, 2005). The results obtained in the present study showed that among the antioxidant enzymes assayed, activities of CAT, GPX and APX showed an increase in the range of 2-to 3Á2-fold upon a-pinene exposure compared with controls.…”

Section: Resultssupporting

confidence: 55%

-Pinene Inhibits Growth and Induces Oxidative Stress in Roots

Singh¹,

Batish²,

Kaur³

et al. 2006

Annals of Botany

247

156

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Section: Resultssupporting

confidence: 55%

-Pinene Inhibits Growth and Induces Oxidative Stress in Roots

Singh¹,

Batish²,

Kaur³

et al. 2006

Annals of Botany

247

156

View full text Add to dashboard Cite

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“…Additionally, it has been shown that triggering of programmed cell death by GA is tightly-related with ROS, predominantly H 2 O 2 , in aleurone cells of barley ( Ishibashi et al, 2012 ). GA decreases the activity of catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD), leading to reduced scavenging ability for ROS, consequently resulting in peroxidative damage of membranes followed by release of hydrolytic enzymes ( Jones and Smirnoff, 2005 ; Figure 3 ).…”

Section: Reactive Oxygen Speciesmentioning

confidence: 99%

The Significance of Reactive Oxygen Species and Antioxidant Defense System in Plants: A Concise Overview

et al. 2021

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In plants, there is a complex and multilevel network of the antioxidative system (AOS) operating to counteract harmful reactive species (RS), the foremost important of which are reactive oxygen species (ROS), and maintain homeostasis within the cell. Specific AOSs for plant cells are, first and foremost, enzymes of the glutathione-ascorbate cycle (Asc-GSH), followed by phenolic compounds and lipophilic antioxidants like carotenoids and tocopherols. Evidence that plant cells have excellent antioxidative defense systems is their ability to survive at H2O2 concentrations incompatible with animal cell life. For the survival of stressed plants, it is of particular importance that AOS cooperate and participate in redox reactions, therefore, providing better protection and regeneration of the active reduced forms. Considering that plants abound in antioxidant compounds, and humans are not predisposed to synthesize the majority of them, new fields of research have emerged. Antioxidant potential of plant compounds has been exploited for anti-aging formulations preparation, food fortification and preservation but also in designing new therapies for diseases with oxidative stress implicated in etiology.

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“…Columns represent means (n = 5) and error bars represent ±SE of the means. Columns for each variety with a different lower-case letter were significantly different at p < 0.05 compared to control reports indicate that oxidative stress induces an increase in the responses of enzymatic systems linked to ROS-scavenging process ( Jones and Smirnoff, 2005). In fact, GR is a key enzyme in providing protection against a variety of environmental and abiotic stresses (Dalton, 1995;Romero-Puertas et al, 2006).…”

Section: Activities Of Antioxidant Enzymesmentioning

confidence: 99%

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Kachout¹,

Hamza²,

Bouraoui³

et al. 2013

Not Bot Hort Agrobot Cluj

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This study examined the influence of salt levels on antioxidant activity and content of carotenoids and anthocyanins of the A. hortensis leaves using two varieties: green orach (var. purpurea) and red orach (var. rubra). Seeds of Atriplex were exposed to 0, 90, 180 and 260 mM NaCl for 3 months and seeds were sown in an earthen pot. Overall levels of ascorbate peroxidase (APX) and glutathione reductase (GR) activity were significantly elevated. Salt stress caused a significant decline in tissue concentrations of catalase (CAT) and superoxide dismutase (SOD). However, 90 mM NaCl did not modify these parameters, which remains similar to control values. Activities of APX and CAT were increase whether the shoots of A. hortensis var. purpurea were grown in the presence of 180 mM NaCl. Thus although some indications of oxidative stress accompany exposure of this salt-tolerant Atriplex varieties to salinity, mechanisms appear to exist within its shoot tissue to permit the tolerance of such oxidative stress. High salt concentration in the culture medium provokes oxidative damage in Atriplex leaves and induces a general increase in antioxidant enzyme activity. In particular, NaCl toxicity decreased content of carotenoids. It also decreased the concentration of anthocyanin pigments in leaves of Atriplex. This work therefore provides a starting point towards a better understanding of the role of antioxidant enzyme in the plant response against salt stress.

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Reactive Oxygen Species in Plant Development and Pathogen Defence

Cited by 5 publications

References 134 publications

-Pinene Inhibits Growth and Induces Oxidative Stress in Roots

-Pinene Inhibits Growth and Induces Oxidative Stress in Roots

The Significance of Reactive Oxygen Species and Antioxidant Defense System in Plants: A Concise Overview

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

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