biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 49:117-119, 2005 | DOI: 10.1007/s10535-005-7119-z

Inhibitory effects of flavonoids on alternative respiration of plant mitochondria

H. Shimoji1, H. Yamasaki2,*
1 Faculty of Science, University of the Ryukyus, Nishihara, Okinawa, Japan
2 Center of Molecular Biosciences (COMB), University of the Ryukyus, Nishihara, Okinawa, Japan

Inhibitory effects of flavonoids on plant alternative respiration were investigated using isolated mitochondria of Vigna radiata seedlings. The antioxidant flavonoids quercetin and myricetin effectively inhibited alternative respiration. We suggest that radical scavenging activity is involved in the inhibitory mechanism.

Keywords: alternative oxidase; quinone; reactive oxygen species
Subjects: alternative oxidase; cytochrome oxidase; flavonoids, alternative respiration; kaempferol; mitochondria; myricetin; n-propylgallate; quercetin; quinone; reactive oxygen species (ROS); respiration, alternative, flavonoids; Vigna radiata

Received: July 15, 2003; Accepted: June 17, 2004; Published: March 1, 2005  Show citation

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Shimoji, H., & Yamasaki, H. (2005). Inhibitory effects of flavonoids on alternative respiration of plant mitochondria. Biologia plantarum, 49(1), 117-119. doi: 10.1007/s10535-005-7119-z
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