Expression analysis of miRNAs and their targets related to salt stress in Solanum lycopersicum H-2274

Abstract

The microRNAs (miRNAs) are a group of small non-coding RNAs found in both plants and animals. Their functions and target genes have been identified in many plant species. It has been shown that miRNAs have crucial roles in stress responses of plants as much as other defence mechanisms. Throughout abiotic stress, miRNAs regulate their target genes and take part in signalling pathways. In this study, we evaluated the expression profiles of miR156, miR170, miR171, miR395, miR398 and miR845, which have been shown to be related with stress, and their target genes in different tissues of Solanum lycopersicum H-2274 plants under salt stress. We applied 100 mmol/L NaCl to tomato plants for one week and performed quantitative polymerase chain reaction (qPCR) analysis. The results that stood out belonged to miR156 both in root and stem tissues and miR398 in stem tissues. Interestingly the expression profiles of these miRNAs and their target genes were similar. These findings show that there is a complex stress response mechanism still waiting to be deciphered. Our findings could provide valuable information to understand the function of miRNAs in stress response mechanisms of plants.

Comprehensive Genome-Wide Analysis and Expression Pattern Profiling of the SlHVA22 Gene Family Unravels Their Likely Involvement in the Abiotic Stress Adaptation of Tomato

“…To determine whether the abiotic stress responses of SlHVA22 genes could also be related to miRNAs, we analyzed the miRNA target sites in SlHVA22 genes. Eleven out of fifteen SlHVA22 gene family members were targeted by tomato miRNAs that regulate abiotic stress tolerance in tomato, such as Sly-MIR159b , Sly-MIR166c-5p , Sly-MIR1917 , Sly-MIR395a , Sly-MIR396a , Sly-MIR396a-5p , Sly-MIR482a , Sly-MIR5302a , Sly-MIR5303 , Sly-MIR6023 , Sly-MIR6024 , Sly-MIR9470-5p , Sly-MIR9474-5p , Sly-MIR9479 , and sly-MIR9479-3p [ 29 , 30 , 31 , 32 ] ( Table S4 ). This indicates that many SlHVA22 genes might be linked to the post-transcriptional regulation of miRNAs in tomato abiotic stress tolerance.…”

Genome-Wide Identification and Analysis of the Class III Peroxidase Gene Family in Tobacco (Nicotiana tabacum)

“…Meanwhile, one well-known drought response TF, Dof ( Li et al, 2021 ), might also regulate NtPOD93 ( Figure 4 ). Another example was miR395-NtPOD202-AP2 module, and many evidences suggested that both miR395 ( Kim et al, 2010 ; Çakır et al, 2021 ) and AP2 ( Zhang et al, 2009 ) might play important roles in salt treatment. Hence, the POD interaction network constructed in our study provides insights into the regulation of peroxides in plants in response to various stresses.…”