MicroRNAs play critical roles during plant development and in response to abiotic stresses

Abstract

MicroRNAs (miRNAs) have been identified as key molecules in regulatory networks. The fine-tuning role of miRNAs in addition to the regulatory role of transcription factors has shown that molecular events during development are tightly regulated. In addition, several miRNAs play crucial roles in the response to abiotic stress induced by drought, salinity, low temperatures, and metals such as aluminium. Interestingly, several miRNAs have overlapping roles with regard to development, stress responses, and nutrient homeostasis. Moreover, in response to the same abiotic stresses, different expression patterns for some conserved miRNA families among different plant species revealed different metabolic adjustments. The use of deep sequencing technologies for the characterisation of miRNA frequency and the identification of new miRNAs adds complexity to regulatory networks in plants. In this review, we consider the regulatory role of miRNAs in plant development and abiotic stresses, as well as the impact of deep sequencing technologies on the generation of miRNA data.

Characterization of Dof Transcription Factors and Their Responses to Osmotic Stress in Poplar (Populus trichocarpa)

“…Among the Dof gene family in the cucumber, there were three target sites for CmDOF1 and two target sites for CmDOF21 ,whereas the remaining 11 CmDOFs have only one target site [43]. In plants, single or multiple miRNAs are induced to regulate the expression of target genes under various stresses to improve the adaptability of plants [48]. The 12 PtrDof target genes belong to four groups of PtrDofs .…”

A Novel Gene, OZONE-RESPONSIVE APOPLASTIC PROTEIN1, Enhances Cell Death in Ozone Stress in Rice

“…2C). OsORAP1 is predicted to interact with a microRNA, Osmir528, in rice (de Lima et al, 2012). Therefore, we analyzed the expression of Osmir528 in all three lines (wild type, KO, and OE) in A-O 3 and E-O 3 conditions.…”

MicroRNAs: The Potential Biomarkers in Plant Stress Response

“…An exportin protein HASTY (HST1) exports it into the cytoplasm [13]. While entering the cytoplasm one of the duplex strands of miRNA is directed to the exosome and degraded by Small RNA Degrading Nuclease (SDN) [14]. The mature miRNA gets exposed to RNA-induced silencing complex (RISCs) complex.…”