Effect of low dose of spermidine on physiological changes in salt-stressed cucumber plants

Effect of low dose of spermidine on physiological changes in salt-stressed cucumber plants The present study was aimed to assess the ameliorative potentiality of exogenously applied low dose of spermidine (Spd) (4.0 mL of 0.1 mM) against salt stress in cucumber (Cucumis sativus L.) plants. Salt stress inhibited plant growth, while Spd increased the shoot length and dry weight of leaves in salt-stressed plants. Chlorophyll, carotenoids, and sucrose contents were lower, and the accumulation of superoxide radical was higher in salt-affected plants than in controls, and these detrimental effects were mitigated by Spd treatment. Moreover, salinity diminished the reduced glutathione and total polyphenols and inhibited the activities of catalase, peroxidase, and polyphenol oxidase as compared with controls, and Spd treatment increased all antioxidant activities in salt-injured plants. NaCl-induced oxidative stress caused a significant decrease in GA4 and GA5 contents. Spd treatment ameliorated these salt stress effects by increasing the quantities of GA4. In addition, sodium content was higher and calcium content was lower in salt-treated plants, while Spd treatment reduced the sodium accumulation and increased the calcium level in plants exposed to NaCl. The results suggest that exogenous application of low Spd dose can ameliorate the salt stress effects on cucumber by modulating the components of photosynthetic pigments, antioxidants, gibberellins, and minerals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Effect of low dose of spermidine on physiological changes in salt-stressed cucumber plants

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Springer US
Copyright © 2014 by Pleiades Publishing, Ltd.
Life Sciences; Plant Physiology; Plant Sciences
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