Inducing salt tolerance in sweet corn by magnetic priming

Acta agriculturae Slovenica

Saman HASAN-NEZHADIAN¹  Saeid ESHGHI⁴  Saeid KARIMI³  Soheil Karimi² 

[1] Department of Crop Science, College of Agriculture, Shiraz University;University of Tehran, Tehran, Iran;Department of Materials Science and Engineering, Engineering School, Shiraz University;Department of Horticultural Science, College of Agriculture, Shiraz University

关键词: hydrogen peroxide;    maize;    malondialdehyde;    plant water content;    proline;    seed germination;    seedling growth;   

DOI  :  10.14720/aas.2017.109.1.09

学科分类：农业科学（综合）

来源: Univerza v Ljubljani * Biotehniska Fakulteta / University of Ljubljana * Biotechnical Faculty

【 摘 要 】

This study evaluates seed germination and growth of sweet corn under NaCl stress (0, 50, and 100 mM), after exposing the seeds to weak (15 mT) or strong (150 mT) magnetic fields (MF) for different durations (0, 6, 12, and 24 hours). Salinity reduced seed germination and plant growth. MF treatments enhanced rate and percentage of germination and improved plant growth, regardless of salinity. Higher germination rate was obtained by the stronger MF, however, the seedling were more vigorous after priming with 15 mT MF. Proline accumulation was observed in parallel with the loss of plant water content under 100 mM NaCl stress. MF prevented proline accumulation by improving water absorption. Positive correlation between H 2 O 2 accumulation and membrane thermostability (MTI) was found after MF treatments, which revealed that MF primed the plant for salinity by H 2 O 2 signaling. However, over-accumulation of H 2 O 2 after prolonged MF exposure adversely affected MTI under severe salt stress. In conclusion, magnetic priming for 6 hours was suggested for enhancing germination and growth of sweet corn under salt stress.

【 授权许可】

Unknown