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

By Yibo Wang, H. Feng, Y. Qu, Jiaqiang Cheng, Zhiguang Zhao, Manxiao Zhang, Xun-ling Wang, L. An. 2006

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The roles of reactive oxygen species (ROS) and nitric oxide (NO) in ethylene synthesis induced by UV-B radiation (280-320nm) in Maize (Zea mays L. Yuyu No. 22) seedlings were investigated. UV-13 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 O-2(center dot-), H2O2 and NOS. In contrast, scavenging UV-B-induced O-2(center dot-), H2O2 and NO production resulted in the repression of UV-B-induced ethylene. Furthermore, exogenous O-2(center dot-) 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 O-2(center dot-)) was found. (c) 2005 Elsevier B.V. All rights reserved.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/9aa3d0758359ceaaccd92c2a50bb8b606e1e08ad