Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/4802
Title: The mitigating effects of nitric oxide and hydrogen peroxide pre-treatments to salt-stressed strawberry plants
Authors: Christou, Anastasios 
Papadopoulos, Ioannis 
Fotopoulos, Vasileios 
Manganaris, George A. 
Issue Date: 2011
Source: 9 Plant GEM Istanbul 2011, Plant Geonomics European Meetings, The Plant Genomics European Meeting (Plant GEM) meets global challenges, 4-7 May 2011, Istanbul
Abstract: Nitric oxide (NO) and hydrogen peroxide (H202) are reactive nitrogen and oxygen species with a well-documented signaling role necessary for maintenance of cell redox homeostasis. In the present study we tested whether hydroponic pre-treatment of strawberry (Fragaria x ananassa cv. Camarosa) roots to H202 (10 mM for 8 h) and sodium nitroprusside (SNP - NO donor; 100 ~M for 48 h), could induce long lasting priming effects and tolerance to subsequent exposure to 100 mM NaCI for 8 d. Both root pre-treatments resulted in significantly reduced leaf chlorophyll degradation, ion leakage and lipid peroxidation levels in comparison with plants directly subjected to salt stress, suggesting a systemic mitigating effect of NO and H202 pre-treatments to cellular damage resulting from abiotic stress factors. Furthermore, both pre-treatments lead to reduced de novo synthesis of NO and H202 in leaves following salt stress, minimizing oxidative and nitrosative stress in strawberry plants. Finally, an NaCI stressinduced decrease in the ascorbate and glutathione redox state was partially prevented by both pre-treatments, providing strong evidence that H202 and NO elicit increased systemic antioxidant activity in strawberry plants under salt stress conditions.
URI: http://ktisis.cut.ac.cy/handle/10488/4802
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