Ar+ Beam Implantation Causes Enhancement of Salt Stress Tolerance in Highland Barley

作者：Wang, X. J.; Jiao, Z.^*; Liang, J. Q.; Yin, Y.; Li, Y. Y.

来源：Russian Journal of Plant Physiology, 2017, 64(5): 749-757.

DOI：10.1134/S1021443717050144

• Hordeum vulgare
• Ar+ ion implantation
• salt resistance
• stress signal transduction

This study examines the effects of ionizing radiation (control, 4 x 10(16), 6 x 10(16), 9.5 x 10(16), and 15 x 10(16) Ar+/cm(2)) on some physio-biochemical and molecular responses of highland barley (Hordeum vulgare L. ssp. vulgare) under salt stress for 0, 24, 48, and 96 h. The growth parameters of highland barley were the highest at the dose of 9.5 x 10(16) Ar+/cm(2), but the lowest at 15 x 10(16) Ar+/cm(2) dose. The malondialdehyde (MDA) content increased with increasing irradiation dose and peaked at 15 x 10(16) Ar+/cm(2) during stress treatments. The activities of antioxidant enzymes and proline accumulation showed different changes than MDA following ion beam irradiation toward stress conditions, at the dose of 15 x 10(16) Ar+/cm(2), antioxidant enzyme activities and proline content were the lowest compared with their corresponding controls, while at the dose of 9.5 x 10(16) Ar+/cm(2) antioxidant enzyme activities and proline content were the highest. Moreover, the expression of salt-related gene followed the same pattern as that of the antioxidant enzymes. Our results suggest that the dose of 9.5 x 10(16) Ar+/cm(2) alleviates salt stress by modulating the physio-biochemical responses and eliciting the stress signal transduction in plants.

• 出版日期2017-9
• 单位郑州大学