The signaling molecule H2O2 improved the heat-tolerance system of Festuca arundinaceaby up-regulating antioxidative activity

Abstract

Abstract: Cool-season turfgrass Festuca arundinacea was pretreated with 10 mmol/L H₂O₂ in pot experiments, and the regulation of the antioxidative system by exogenous H₂O₂ and its effects on heat-tolerance were studied. Exogenous H₂O₂ may activate the defensive system in F. arundinacea ahead of heat stress, and alleviate oxidative damage resulting from subsequent heat stress. CAT and POD activities were not significantly increased by exogenous H₂O₂ treatment. Heat stress itself increased POD activity, and POD may play a more important role in improving heat resistance of the turfgrass. H₂O₂ significantly affected the AsA-GSH cycle in F. arundinacea. APX, GPX and GR activities increased 20%-110% and GSH/GSSG significantly decreased 80% in the cycle, and were closely associated with the acquirement of heat tolerance in F. arundinacea. The signaling molecule H₂O₂ can improve the heat-tolerance of F. arundinacea by regulating the antioxidative system.

CLC Number:

WANG Yan, LI Jian-long, YU Zui, XUE Feng. The signaling molecule H₂O₂ improved the heat-tolerance system of Festuca arundinaceaby up-regulating antioxidative activity[J]. Acta Prataculturae Sinica, 2010, 19(1): 89-94.

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The signaling molecule H₂O₂ improved the heat-tolerance system of Festuca arundinaceaby up-regulating antioxidative activity

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