Seawater irrigation:: antioxidant defence responses in leaves and roots of a sunflower (Helianthus annuus L.) ecotype

被引:53
作者
Di Baccio, D [1 ]
Navari-Izzo, F [1 ]
Izzo, R [1 ]
机构
[1] Univ Pisa, Dipartimento Chim & Biotecnol Agrarie, I-56124 Pisa, Italy
关键词
ascorbate; ascorbate peroxidase; glutathione; glutathione reductase; seawater; salt stress; sunflower;
D O I
10.1016/j.jplph.2003.07.001
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Salinity is a widespread environmental stress for crop plants. It is common in arid, semiarid, and coast regions. In those environments, seawater infiltrations can occur or the sea provides the only source of water for irrigation. The effects of 10% and 20% seawater in nutrient solutions were studied in 30 day-old plants of sunflower (Helianthus annuus L.) ecotype Katharina Piacenza. Growth parameters, ascorbate and glutathione contents, and the activities of ascorbate peroxidase and glutathione reductase were determined in shoots and roots. The results showed antioxidative responses of the ecotype to both salt treatments. The different activity patterns of antioxidant molecules and enzymes in the leaves and roots suggested a different kind of reaction to the two seawater concentrations. (C) 2004 Elsevier GmbH. All rights reserved.
引用
收藏
页码:1359 / 1366
页数:8
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