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Reactive oxygen species mediate IAA-induced ethylene production in mungbean (Vigna radiata L) hypocotyls
- Reactive oxygen species mediate IAA-induced ethylene production in mungbean (Vigna radiata L) hypocotyls
- Song, Yoon Jung; Joo, Jung Hee; Ryu, Hee Young; Lee, June Seung; Bae, Yun Soo; Nam, Kyoung Hee
- Ewha Authors
- 이준승; 배윤수; 남경희; 주정희
- SCOPUS Author ID
- 이준승; 배윤수; 주정희
- Issue Date
- Journal Title
- JOURNAL OF PLANT BIOLOGY
- vol. 50, no. 1, pp. 18 - 23
- ACC oxidase; ACC synthase; auxin-induced ethylene production; ROS
- BOTANICAL SOCIETY OF KOREA
- SCIE; SCOPUS; KCI
- We reported previously that ROS may function as a downstream component for signaling auxin, a hormone that induces the ethylene production. Here we demonstrated that ROS can act upstream to promote auxin-induced ethylene production in mungbean hypocotyls. When plants were treated with AVG, ethylene biosynthetic inhibitor, or ACC, ethylene precursor, we found that little effect on the ROS generation. Hypocotyls exposed to H2O2 showed higher ethylene accumulations compared with untreated samples. Furthermore, auxin-induced ethylene production was reduced when tissues were pre-treated with a ROS scavenger, N-acetyl-L-cystein (NAC). We attributed this stimulatory effect to the activation of ethylene biosynthetic enzymes that results from transcriptional up-regulation of VR-ACS1 and VR-ACS7 to encode ACC synthase, as well as of VR-ACO1 and VR-ACO2, which encode ACC oxidase.
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