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Effect of SS-toxin, a metabolite of Stemphylium solani, on H+-ATPase activity and standard redox system in plasma membranes from seedlings leaves of garlic (Allium sativum)

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Title: Effect of SS-toxin, a metabolite of Stemphylium solani, on H+-ATPase activity and standard redox system in plasma membranes from seedlings leaves of garlic (Allium sativum)
Author: Zheng, Lu; Lv, Rujing; Li, Qili; Liu, Tianbo; Huang, Junbin; Hsiang, Tom
Abstract: Leaf blight of garlic (Allium sativum) is a severe disease in garlic-growing regions. SS-toxin is a newly described non-proteinaceous toxin produced by the phytopathogenic fungus, Stemphylium solani, the cause of garlic leaf blight. In this study, the effects of SS-toxin on the H+-ATPase activity and standard redox activity in the plasma membranes isolated by aqueous polymer two-phase partitioning from garlic seedling leaves were studied in vitro. The H+-ATPase activity, NADH oxidation rate and Fe(CN)6 3− reduction rate of the plasma membranes isolated from susceptible and resistant cultivars were all inhibited in a dose-dependent manner. Our results suggest that, under in vitro conditions, the plasma membrane H+-ATPase and standard redox system can be both the cellular targets of SS-toxin.
URI: http://hdl.handle.net/10214/2394
Date: 2010-04-20
Citation: Zheng, L., Lv R., Li, Q., Liu, T., Huang, J., Hsiang, T. "Effect of SS-toxin, a metabolite of Stemphylium solani, on H+-ATPase activity and standard redox system in plasma membranes from seedlings leaves of garlic (Allium sativum)." European Journal of Plant Pathology 127.3 (2010): 419-425


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