Exogenous paraquat changes antioxidant enzyme activities and lipid peroxidation in drought-stressed cucumber leaves

Liu, Zhong-Jing; Zhang, Xiaolong; Bai, Ji-Gang; Suo, Bang-Xia; Xu, Pao; Wang, Lin

doi:10.1016/j.scienta.2009.01.032

Cited by 114 publications

(67 citation statements)

References 44 publications

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“…Increased accumulation of proline under drought stress confers an ability to lower osmotic potential, as well as to protect DNA, enzymes and cellular membranes from oxidative damage. (Liu et al 2009;Gomes et al 2010). Thus a higher proline accumulation in PR202, under stress, can be correlated with better stress tolerance characteristics.…”

Section: Resultsmentioning

confidence: 94%

Responses to drought induced oxidative stress in five finger millet varieties differing in their geographical distribution

Bhatt

Negi

Sharma

et al. 2011

Physiol Mol Biol Plants

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The study presents the impact of drought stress on five finger millet varieties (PR202, VL146, VL315, PES400 and VR708), representing contrasting areas of Indian sub-continent. Drought stress induced increase in the activity of superoxide dismutase, ascorbate peroxidase and glutathione reductase was higher in PR202 and VL315, while the activity was lower in the varieties PES400 and VR708. Ascorbate peroxidase : superoxide dismutase ratio, which is a crucial factor in alleviating drought stress, was higher in varieties PR202 and VL315, whilst the varieties PES400 and VR708 exhibited a lower ratio under stress. The variety PES400 recorded maximum stress induced damage, as indicated by higher accumulation of malondialdehyde and hydrogen peroxide; whereas the variety PR202 recorded least stress induced cytotoxic damage. The results clearly indicate that better drought tolerance of the variety PR202 is positively related to the capacity of its antioxidant system to scavenge reactive oxygen species, resulting in a reduced incidence of oxidative damage. Ascorbate peroxidase : superoxide dismutase ratio is found to be a critical factor governing the stress tolerance potential of different varieties. Therefore, varieties PR202 and VL315 were found to be tolerant while PES400 was susceptible to drought stress.

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Section: Resultsmentioning

confidence: 94%

Responses to drought induced oxidative stress in five finger millet varieties differing in their geographical distribution

Bhatt

Negi

Sharma

et al. 2011

Physiol Mol Biol Plants

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“…SOD and CAT activities were greater in Aoulouz and Aoulouz and Rabia, respectively, when compared with other ecotypes under drought stress (Table 5). Liu et al (2009) reported that drought stress increased the activities of antioxidants such as SOD and CAT. These both enzymes are the important components of protective systems.…”

Section: Discussionmentioning

confidence: 99%

Physiological and biochemical traits of drought tolerance inArgania spinosa

Chakhchar

Wahbi

Lamaoui

et al. 2015

Journal of Plant Interactions

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The objective of this study was to understand and characterize the physiological and biochemical tolerance mechanisms of Argania spinosa under drought stress for selection tolerant ecotypes. Significant differences were observed among ecotypes in indices of leaf water status studied: stomatal conductance (g s ), predawn leaf water potential (Ψ pd ) and leaf relative water content. There was a significant decrease in these physiological traits with increasing degree of drought stress in all ecotypes. Drought stress significantly increased endogenous H 2 O 2 and lipid peroxidation. Moderate and severe drought stress increased significantly the catalase, superoxide dismutase, peroxidase, polyphenoloxidase and lipoxygenase activities, depending on time. Their constitutive activities were higher in inland ecotypes than in coastal ecotypes. According to canonical discriminant analysis, the inland ecotypes were essentially distinguished from the coastal ecotypes by the following physiological and biochemical traits: Ψ pd , g s , polyphenol oxidase, superoxide dismutase and malonyldialdehyde. Inland ecotypes seem to be more tolerant to drought stress than coastal ecotypes.

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“…Environmental stress generally causes MDA contents to be increased in cells. Polyethylene glycol increased MDA contents in cucumber leaves [44]. And Zhang et al [45] reported that significant increases in MDA contents were observed in M. aeruginosa cells with greater exposure concentrations of berberine and the prolongation of exposure time.…”

Section: Cell Viability and Productsmentioning

confidence: 95%

Allelochemical ethyl 2-methyl acetoacetate (EMA) induces oxidative damage and antioxidant responses in Phaeodactylum tricornutum

Yang

Liu

Zhou

et al. 2011

Pesticide Biochemistry and Physiology

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Exogenous paraquat changes antioxidant enzyme activities and lipid peroxidation in drought-stressed cucumber leaves

Cited by 114 publications

References 44 publications

Responses to drought induced oxidative stress in five finger millet varieties differing in their geographical distribution

Responses to drought induced oxidative stress in five finger millet varieties differing in their geographical distribution

Physiological and biochemical traits of drought tolerance inArgania spinosa

Allelochemical ethyl 2-methyl acetoacetate (EMA) induces oxidative damage and antioxidant responses in Phaeodactylum tricornutum

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