Weak Microwave Can Enhance Tolerance of Wheat Seedlings to Salt Stress |
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Authors: | Yi-Ping Chen Jing-Fen Jia Ying-Juan Wang |
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Institution: | (1) SKLLQG, Institute of Earth Environment, Chinese Academy of Science, No. 10, Feng-Hui Road, Xi’an, 710075, China;(2) College of Life Science, Northwest University, Xi’an, 710069, China |
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Abstract: | The aim of our investigation was to determine the effect of microwave pretreatment of wheat seeds on the tolerance of seedlings
to salt stress. Selected parameters (for example, plant growth and biochemical parameters related to oxidative status) were
measured. The results showed that microwave pretreatments for 5, 10, 15, or 20 s resulted in an increase in root length and
shoot height in seedlings, with 10- and 15-s treatments giving the greatest effect. Salt stress, produced by treatment with
200 mM NaCl, reduced the length and fresh weight of shoots and roots, enhanced the leaf concentrations of malondialdehyde
(MDA) and oxidized glutathione (GSSG), indicators of oxidative stress, while decreasing the activities of nitric oxide synthase
(NOS), catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), and glutathione reductase (GR). Furthermore, the salt
treatment reduced the concentration of nitric oxide (NO) and glutathione (GSH) in the shoots. However, treatments of seeds
with microwave radiation followed by salt stress restored all of these parameters close to those in non-salt-treated seedlings.
The results indicate that application of a suitable dose of microwave radiation to seeds can enhance tolerance to salt stress
in wheat seedlings. |
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