scholarly journals Effects of Exogenous Melatonin on Methyl Viologen-Mediated Oxidative Stress in Apple Leaf

2018 ◽  
Vol 19 (1) ◽  
pp. 316 ◽  
Author(s):  
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...  
Keyword(s):  
Oxidative Stress ◽  
Methyl Viologen ◽  
Exogenous Melatonin

scholarly journals Exogenous Melatonin Mitigates Methyl Viologen-Triggered Oxidative Stress in Poplar Leaf

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2852 ◽  
Author(s):  
Fei Ding ◽  
Gang Wang ◽  
Shuoxin Zhang
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Enzymes ◽  
Methyl Viologen ◽  
Membrane Damage ◽  
Enzymatic Antioxidants ◽  
Exogenous Melatonin ◽  
Leaf Discs ◽  
Expression Of Genes ◽  
Ameliorative Effect ◽  
Poplar Leaf

As a ubiquitous molecule, melatonin plays a crucial role in tolerance to multiple stresses in plants. In the present work, we report the role of exogenous melatonin in relieving oxidative stress induced by methyl viologen (MV) in poplar (Populus alba × Populus glandulosa) leaf. Leaf discs pretreated with melatonin exhibited increased tolerance to MV-mediated oxidative stress. It was observed that melatonin pretreatment effectively reduced membrane damage and lipid oxidation as demonstrated by decreased relative electrolyte leakage and malonaldehyde content in poplar leaf discs. Exogenous melatonin also stimulated activities of antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX), and enhanced accumulation of non-enzymatic antioxidants of AsA and GSH in leaf discs exposed to MV. In addition, pretreatment of melatonin prompted expression of genes for those antioxidant enzymes. Notably, exogenous melatonin increased expression of P5CS, a key gene for proline biosynthesis, under MV treatment. It was further observed that pretreatment with melatonin boosted activity of P5CS as well as accumulation of proline in leaf discs under MV-mediated oxidative stress. Collectively, this work provides evidence for the ameliorative effect of melatonin on MV-induced oxidative stress in poplar leaf.

Enhanced tolerance of transgenic sweetpotato plants that express both CuZnSOD and APX in chloroplasts to methyl viologen-mediated oxidative stress and chilling

2007 ◽  
Vol 19 (3) ◽  
pp. 227-239 ◽  
Author(s):  
Soon Lim ◽  
Yun-Hee Kim ◽  
Sun-Hyung Kim ◽  
Suk-Yoon Kwon ◽  
Haeng-Soon Lee ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Methyl Viologen

Alleviation of methyl viologen-mediated oxidative stress by Brassica juncea annexin-3 in transgenic Arabidopsis

Plant Science ◽  
2014 ◽  
Vol 219-220 ◽  
pp. 9-18 ◽  
Author(s):  
Ahan Dalal ◽  
Abhay Kumar ◽  
Deepanker Yadav ◽  
Triveni Gudla ◽  
Andrea Viehhauser ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Brassica Juncea ◽  
Methyl Viologen ◽  
Transgenic Arabidopsis

scholarly journals Lysine Decarboxylase Expression by Vibrio vulnificus Is Induced by SoxR in Response to Superoxide Stress

2006 ◽  
Vol 188 (24) ◽  
pp. 8586-8592 ◽  
Author(s):  
Ju-Sim Kim ◽  
Sang Ho Choi ◽  
Jeong K. Lee
Keyword(s):  
Oxidative Stress ◽  
Superoxide Dismutase ◽  
Promoter Region ◽  
Methyl Viologen ◽  
Vibrio Vulnificus ◽  
External Medium ◽  
Gene Dosage ◽  
Acid Stress ◽  
Lysine Decarboxylase ◽  
Wild Type

ABSTRACT Lysine decarboxylase expression by Vibrio vulnificus, which is up-regulated by CadC in response to acid stress, is also induced by SoxR in response to superoxide stress. SoxR binds to the promoter region of the cadBA operon, coding for a lysine-cadaverine antiporter (CadB) and a lysine decarboxylase (CadA). The induction of cadBA transcription by SoxR is independent of CadC. Cadaverine, which neutralizes the external medium, also appears to scavenge superoxide radicals, since increasing cellular cadaverine by elevating the gene dosage of cadBA significantly diminished the induction of Mn-containing superoxide dismutase under methyl viologen-induced oxidative stress. Consistently, a lack of cadaverine caused by mutation in cadA resulted in low tolerance to oxidative stress compared with that of the wild type.

Overexpression of 2-cysteine peroxiredoxin enhances tolerance to methyl viologen-mediated oxidative stress and high temperature in potato plants

2011 ◽  
Vol 49 (8) ◽  
pp. 891-897 ◽  
Author(s):  
Myoung Duck Kim ◽  
Yun-Hee Kim ◽  
Suk-Yoon Kwon ◽  
Bo-Young Jang ◽  
Sang Yeol Lee ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
High Temperature ◽  
Methyl Viologen ◽  
Potato Plants
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