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The relationship between reactive oxygen species and nitric oxide in ultraviolet-B-induced ethylene production in leaves of maize seedlings



The relationship between reactive oxygen species and nitric oxide in ultraviolet-B-induced ethylene production in leaves of maize seedlings



Environmental and experimental botany 57(1-2): 51-61



The roles of reactive oxygen species (ROS) and nitric oxide (NO) in ethylene synthesis induced by UV-B radiation (280-320 nm) in Maize (Zea mays L. Yuyu No. 22) seedlings were investigated. UV-B radiation resulted in the increase in ROS, NO and ethylene production. Repression of the UV-B-induced ethylene by inhibitors of ethylene synthesis did not affect the accumulation of UV-B-induced superoxide anion, H2O2 and NOS. In contrast, scavenging UV-B-induced superoxide anion, H2O2 and NO production resulted in the repression of UV-B-induced ethylene. Furthermore, exogenous superoxide anion and NO promoted the UV-B-induced ethylene accumulation. The results indicated that ROS and NO played an important role in UV-B-induced ethylene synthesis in maize seedlings. Experiments with related inhibitors suggested that NO was originated from NOS, not from NR, and ROS was not from NADPH oxidase. A synergistic effect in promoting the accumulation of UV-B-induced ethylene between NO and ROS (mainly superoxide anion) was found.

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Accession: 004528499

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DOI: 10.1016/j.envexpbot.2005.04.009



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