Abiotic stress alleviation by silicon

Sara Naseri Rad

Silicon (Si) is the most abundant mineral element in the Earth´s crust. During the last decade, several studies have addressed the mechanism(s), by which Si promotes plant growth and development. Thereby, it turned out that silicon mainly protects plants from biotic and abiotic stresses. In particular, Si has been shown to enhance plant tolerance to drought stress.

In addition, Si has been shown to mitigate nutrient deficiencies in several crop species. However, studies considering the relevance of Si nutrition on metabolites and phytohormones or molecular mechanism(s), by which Si nutrition enhances drought and k deficiency responses have remained unclear. To address these questions, we perform transcriptome profiling using RNA sequencing (RNAseq), phytohormone and metabolite profiling, partly in transgenic barley lines, which will be subjected to drought or K deficiency in the absence of presence of Si.