Effect of thiol redox state modulators on oxidative stress and sclerotial differentiation of the phytopathogenic fungus Rhizoctonia solani.

Autor:	Patsoukis, Nikolaos, Georgiou, Christos
Předmět:	OXIDATIVE stress PHYTOPATHOGENIC fungi RHIZOCTONIA solani OXIDATION-reduction reaction CELL-mediated cytotoxicity GLUTATHIONE DNA damage BIOCHEMICAL genetics GENETIC mutation FUNGI in agriculture
Zdroj:	Archives of Microbiology; Sep2007, Vol. 188 Issue 3, p225-233, 9p, 1 Diagram, 3 Graphs
Abstrakt:	This study showed that sclerotial differentiation in the filamentous phytopathogenic fungus Rhizoctonia solani is directly related to oxidative stress and thiol redox state (TRS). Sclerotial differentiation is modulated by the availability of non-cytotoxic −SH groups as was shown by the inhibition of sclerorial differentiation by the TRS modulator N-acetyl cysteine (AcCSH), and not necessarily with those of the TRS reduced components glutathione (GSH) and its precursor cysteine (CSH) as indicated by the GSH-biosynthesis inducer and inhibitor l-2–oxo-thiazolidine-4-carboxylate and l-buthionine-S,R-sulfoximine, respectively. Moreover, inhibition of sclerotial differentiation was accompanied by decrease of the high oxidative stress indicators, lipid peroxidation and DNA damage in the mycelial substrate where sclerotia initials are formed, which suggests that this phenomenon is related to oxidative stress as it is predicted by our theory on sclerotial differentiation. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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