The role of ascorbic acid role in the differentiationof sclerotia in Sclerotinia minor

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• 作者：Georgiou ; Christos D. ; Petropoulou ; Katherine P.
• 关键词：Ascorbic acid ; fungi ; lipid peroxidation ; oxidative stress
• 刊名：Mycopathologia
• 出版年：2002
• 出版时间：2002
• 年：2002
• 卷：154
• 期：2
• 页码：71-77
• 全文大小：100 KB

文摘

Sclerotinia minor in culture produces ascorbic acid in levels dependent on oxidative growth conditions and stage of development. During differentiation reduced/oxidized ascorbate ratio decreased by 12 and 6 fold at high and low oxidative stress, respectively. Exogenous ascorbate caused aconcentration-dependent decrease of oxidative stress (lipid peroxidation),inhibition of sclerotial differentiation (up to 100 % ) and delay of differentiatlon (up to 10 days). Ascorbic acid may be produced to help the fungus reduce oxidative stress during growth. The data of this study support our theory proposing that oxidative stress is the inducing factor of sclerotial differentiation infungi.