Plant Growth Regulation

, Volume 48, Issue 2, pp 137–144

Thermotolerance and Related Antioxidant Enzyme Activities Induced by Heat Acclimation and Salicylic Acid in Grape (Vitis vinifera L.) Leaves

Article

DOI: 10.1007/s10725-005-6146-2

Cite this article as:
Wang, L. & Li, S. Plant Growth Regul (2006) 48: 137. doi:10.1007/s10725-005-6146-2

Abstract

Thermotolerance and related antioxidant enzyme activities induced by both heat acclimation and exogenous salicylic acid (SA) application were studied in grapevine (Vitis vinifera L. cv. Jingxiu). Heat acclimation and exogenous SA application induced comparable changes in thermotolerance, ascorbic acid (AsA), glutathione (GSH), and hydrogen peroxide (H2O2) concentrations, and in activities of the antioxidant enzymes superoxide dismutase (SOD), peroxidase (POD), glutathione reductase (GR), ascorbic peroxidase (APX) and catalase (CAT) in grape leaves. Within 1 h at 38 °C, free SA concentration in leaves rose from 3.1 μg g−1 FW to 19.1 μg g−1 FW, then sharply declined. SA application and heat acclimation induced thermotolerance were related to changes of antioxidant enzyme activities and antioxidant concentration, indicating a role for endogenous SA in heat acclimation in grape leaves.

Keywords

Antioxidant enzymesH2O2Heat acclimationSalicylic acidThermotoleranceVitis vinifera

Abbreviation

APX

ascorbate peroxidase

AsA

ascorbic acid

CAT

catalase

GR

glutathione reductase

GSH

glutathione

POD

peroxidase

SA

salicylic acid

SOD

superoxide dismutase

Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Institute of BotanyChinese Academy of SciencesBeijingChina