TY  - JOUR
AB  - The effect of 4-hydroxybenzoic acid (4-HBA) on resistance of coleoptiles of 4-day-old etiolated seedlings of wheat (Triticum aestivum L., cv. Elegiya) to damaging heating (10 min at 43°C) and possible dependence of this effect on changes in the activities of enzymes producing and scavenging reactive oxygen species (ROS) were investigated. Treatment of coleoptiles with 10 μM 4-HBA resulted in enhancing of superoxide anion-radical generation and maintaining of hydrogen peroxide content there in. Increasing of the rate of ROS production was significantly suppressed by inhibitors of NADPH oxidase (α-naphthol) and peroxidase (salicylhydroxamic acid). Under the influence of 4-HBA the activities of superoxide dismutase and apoplastic forms of peroxidase were increased. The activity of oxalate oxidase and catalase has not changed. Exogenous 4-HBA improved coleoptiles heat resistance and its effects were comparable with the influence of salicylic acid. Antioxidant agent BHT (butylhydroxytoluene), inhibitors of NADPH oxidase and peroxidase significantly reduced the increasing of wheat coleoptiles heat resistance, caused by 4-HBA action. It was concluded that 4-HBA influence on coleoptiles heat resistance is realized with the ROS mediation.
AU  - Yastreb, T. O.
AU  - Kolupaev, Yu. Ye.
AU  - Vayner, A. O.
ET  - 2012
KW  - Triticum aestivum L.
4-hydroxybenzoic acid
reactive oxygen species
heat resistance
M1  - 3
M3  - ORIGINAL ARTICLE
PY  - 2012
SN  - 1997-0838
SP  - 72-81
ST  - Induction of Heat Resistance in Wheat Coleoptiles by 4-Hydroxybenzoic Acid: Connection with the Generation of Reactive Oxygen Species
T2  - Journal of Stress Physiology & Biochemistry
TI  - Induction of Heat Resistance in Wheat Coleoptiles by 4-Hydroxybenzoic Acid: Connection with the Generation of Reactive Oxygen Species
UR  - http://www.jspb.ru/issues/2012/N3/JSPB_2012_3_72-81.pdf
VL  - 8
ID  - 49
ER  -