scholarly journals Thiol redox state and oxidative stress affect sclerotial differentiation of the phytopathogenic fungi Sclerotium rolfsii and Sclerotinia sclerotiorum

2007 ◽  
Vol 0 (0) ◽  
pp. 070915213557004-??? ◽  
Author(s):  
N. Patsoukis ◽  
C. D. Georgiou
Keyword(s):  
Oxidative Stress ◽  
Sclerotinia Sclerotiorum ◽  
Redox State ◽  
Sclerotium Rolfsii ◽  
Phytopathogenic Fungi ◽  
Thiol Redox State ◽  
Thiol Redox ◽  
Sclerotial Differentiation ◽  
And Oxidative Stress

Differentiation of Sclerotinia minor depends on thiol redox state and oxidative stress

2008 ◽  
Vol 54 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Nikolaos Patsoukis ◽  
Christos D. Georgiou
Keyword(s):  
Oxidative Stress ◽  
Redox State ◽  
Phytopathogenic Fungus ◽  
Sclerotinia Minor ◽  
Thiol Redox State ◽  
Sh Group ◽  
Thiol Redox ◽  
Sclerotial Differentiation ◽  
And Oxidative Stress

Sclerotial differentiation in Sclerotinia minor is associated with oxidative stress and thiol redox state. The significance of oxidative stress to sclerotial differentiation was revealed by the higher oxidative stress of S. minor compared with a nonsclerotiogenic counterpart. The effect of thiol redox state on sclerotial differentiation was shown by the antioxidant action of the thiol (-SH) group of N-acetylcysteine and cysteine and by an unknown (not antioxidant) role of glutathione (GSH) on S. minor. The nonantioxidant role of GSH was indicated by the differentiation-inhibiting and differentiation-noninhibiting actions of the GSH biosynthesis inhibitor l-buthionine-S,R-sulfoximine and the GSH biosynthesis inducer l-2-oxo-thiazolidine-4-carboxylate, respectively, and by the increase of oxidative stress they caused during the transition from the undifferentiated to differentiated state of S. minor. Moreover, N-acetylcysteine can be used as a potent nontoxic fungicide against this phytopathogenic fungus by acting as a growth-inhibiting cytotoxic oxidant and by sustaining the fungus in the undifferentiated hyphal stage, which is vulnerable to degradation by soil microorganisms.

scholarly journals Superoxide radical induces sclerotial differentiation in filamentous phytopathogenic fungi: a superoxide dismutase mimetics study

Microbiology ◽  
2010 ◽  
Vol 156 (3) ◽  
pp. 960-966 ◽  
Author(s):  
Ioannis Papapostolou ◽  
Christos D. Georgiou
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Superoxide Dismutase ◽  
Sclerotinia Sclerotiorum ◽  
Superoxide Radical ◽  
Sclerotium Rolfsii ◽  
Phytopathogenic Fungi ◽  
Indirect Indicator ◽  
Superoxide Dismutase Mimetics ◽  
Sclerotial Differentiation

This study shows that the superoxide radical (O2 •−), a direct indicator of oxidative stress, is involved in the differentiation of the phytopathogenic filamentous fungi Rhizoctonia solani, Sclerotinia sclerotiorum, Sclerotium rolfsii and Sclerotinia minor, shown by using superoxide dismutase (SOD) mimetics to decrease their sclerotial differentiation. The production rate of O2 •− and SOD levels in these fungi, as expected, were significantly lowered by the SOD mimetics, with concomitant decrease of the indirect indicator of oxidative stress, lipid peroxidation.

Thiol redox state and oxidative stress in midbrain and striatum of weaver mutant mice, a genetic model of nigrostriatal dopamine deficiency

2005 ◽  
Vol 376 (1) ◽  
pp. 24-28 ◽  
Author(s):  
Nikolaos Patsoukis ◽  
Ioannis Papapostolou ◽  
George Zervoudakis ◽  
Christos D. Georgiou ◽  
Nikolaos A. Matsokis ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Redox State ◽  
Genetic Model ◽  
Mutant Mice ◽  
Thiol Redox State ◽  
Nigrostriatal Dopamine ◽  
Thiol Redox ◽  
And Oxidative Stress

Thiol redox state (TRS) and oxidative stress in the mouse hippocampus after pentylenetetrazol-induced epileptic seizure

2004 ◽  
Vol 357 (2) ◽  
pp. 83-86 ◽  
Author(s):  
Nikolaos Patsoukis ◽  
George Zervoudakis ◽  
Nikolaos T Panagopoulos ◽  
Christos D Georgiou ◽  
Fevronia Angelatou ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Epileptic Seizure ◽  
Redox State ◽  
Thiol Redox State ◽  
Mouse Hippocampus ◽  
Thiol Redox ◽  
And Oxidative Stress
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