The effect of silicon and silicon dioxide nanoparticle on growth factors, osmolytes and ionic content of saffron (Crocus Sativus L.) under salinity stress

Document Type : Research Paper

Author

Biologg Department< Science faculty< Urmia university

Abstract

Saffron with scientific name of Crocus sativus L. is one of the oldest medicinal herbs which has always been center of attention and its performance depends on different factors. The aim of this study was to examine the effect of salinity stress on saffron plants and the role of foliar application of silicon and silicon nanoparticles in alleviating the impact of salinity. Saffron plants were treated at the four- leaf stage of plants by different levels of salinity (0, 75 and 150 mM), silicon and silicon dioxide NPs (0.5 and 1 mM) with four replications along 3 month. Aftert harvest, growth and biochemical variables were determined. The results showed that salinity reduced length of shoots and roots, fresh and dry weight of the aerial and underground organs, K+ content, K+/Na+ ratio and RWC. Forthermore, salinity incrased the cell death, amout of proline, glycine betain and Na+ and Cl- content in the treated plant. Foliar application of silicon and silicon dioxide nanoparticles improved growth factors, RWC, K+ content and K+/Na+ ratio. The results also showed applying silicon and nanosilicon decreased compatible osmolytes and Na+ and Cl- content. It can be concluded that Si and SiO2 NPs, especially SiO2 NPs, had the ability to reduce the toxicity created under salinity stress in saffron and could play an important role in increasing the resistance of saffron plants to salinity stress.

Keywords

Volume 35, Issue 1
April 2022
Pages 31-41
  • Receive Date: 07 December 2019
  • Revise Date: 22 May 2020
  • Accept Date: 28 September 2020
  • First Publish Date: 26 December 2021