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plas·to·quin·one (PQ),

2,3-Dimethyl-1,4-benzoquinone with a multiprenyl side chain; a trivial name sometimes used for plastoquinone-9.
References in periodicals archive ?
Mitochondria-targeted plastoquinone derivatives as tools to interrupt execution of the aging program.
Caption: Figure 2: Mitochondria-targeted antioxidants with ubiquinone or plastoquinone antioxidant moiety, that are used in kidney ischemia/reperfusion injury.
Chlororespiration and poising of cyclic electron transport: plastoquinone as electron transporter between thylakoid NADH dehydrogenase and peroxidase.
passes the electron to a second plastoquinone molecule ([Q.
To assure maximal opening of reaction centers, sometimes the sample is initially illuminated with a far-red light that stimulates preferentially PSI activity and reoxidizes any reduced plastoquinone molecules.
Prevention of cardiolipin oxidation and fatty acid cycling as two antioxidant mechanisms of cationic derivatives of plastoquinone (SkQs)," Biochimica et Biophysica Acta (BBA)-Bioenergetics, vol.
2) with salinity and Pb stress might have resulted from reduced synthesis of chlorophyll and plastoquinone, distorted chloroplast ultra-structure, blocked electron transport and CO2 deficiency due to stomatal closure, all were occurring simultaneously (Sharma and Dubey, 2005; Ashraf and Harris, 2013).
The latter part of the molecule acts as a transmembrane transporter to the negatively charged inner lumen of the mitochondria [11], where the plastoquinone part provides rechargeable ROS-scavenging activity.
The higher Fv for samara than leaf means that samara has higher PSII capacity to reduce plastoquinone (Bukhov et al.
The increase in VI can be attributed to the accumulation of reduced QA and plastoquinone, which cannot transfer electrons to the dark reactions.
The efficacy of this herbicide on red rice control resulted from its alternative mode of action, inhibiting 5-enolpyruvylshikimate 3- phosphate synthase (EPSPS), a key enzyme in the shikimate biosynthetic pathway that is necessary for the production of the aromatic amino acids, auxin, phytoalexins, folic acid, lignin, plastoquinones and many other secondary products.