Function of MYB domain transcription factors in abiotic stress and epigenetic control of stress response in plant genome

Abstract

Plants have developed highly efficient and remarkable mechanisms to survive under frequent and extreme environmental stress conditions. Exposure of plants to various stress factors is associated with coordinated changes in gene expression at the transcriptional level and hence transcription factors, such as those belonging to the MYB family play a central role in triggering the right responses. MYB transcription factors have been extensively studied in regard of their involvement in the regulation of a number of such stress responses in plants. Genetic and molecular biological studies, primarily in Arabidopsis, have also begun to unravel the role of MYB transcription factors in the epigenetic regulation of stress responses in plants. This review focuses on the role of MYB transcription factors in the regulation of various stress responses in general, highlighting on recent advances in our understanding of the involvement of this class of transcription factors in epigenetic regulation of stress response in plant genome.

Recent hybridization and allopolyploidy reprogrammedSpartinamicroRNA expression under xenobiotic induced stress

“…On the other hand, MIR159 is an evolutionary conserved miRNA that targets MYB transcription factors to function both as a switch and as a tuning mechanism, modulating the expression of its targets in response to endogenous and exogenous signals (Alonso-Peral et al ., 2012). MYB transcription factors and miR159 interactions are involved in many stress responses like UV-B or drought (Roy, 2016; Li et al ., 2016; Chen et al ., 2018). However, their function in xenobiotic detoxification or tolerance related mechanisms were never described to our knowledge.…”

Transcriptome Analysis of Wheat Roots Reveals a Differential Regulation of Stress Responses Related to Arbuscular Mycorrhizal Fungi and Soil Disturbance

“…We detected, for instance, 20 transcription factors belonging to the MYB family, which are involved in stress responses in plants [49], 20 disease resistance proteins, eight pathogenesis related-proteins, four protein SAR DEFICIENT 1-like transcripts that are activated in response to biotic and abiotic stresses [50], and the metal-transporter NRAMP3 amongst over-expressed genes in the Disturbed roots. Four metallothionein encoding genes, three heavy metal-associated isoprenylated plant proteins and one metal tolerance protein 1 were also found to be over-expressed in the Disturbed regime ( Supplementary Table S5).…”

“…One gene family highly expressed in the Disturbed wheat roots was the transcription factors MYB. They are involved in different processes, such as differentiation, hormonal, and biotic and abiotic stresses responses [49,65]. Recently, it was also found that the combined effect of salt stress and AMF mycorrhization led to the up-regulation of these genes in the species Sesbania cannabina [66].…”

Membrane-bound NAC transcription factors in maize and their contribution to the oxidative stress response

“…A number of TF families, notably AP2/DREB, MYB, WRKY and NAC (NAM, ATAF1, 2 and CUC2), have been implicated in regulating the plant response to abiotic stress and in modulating growth and development [5][6][7][8][9][10][11][12][13]. The NAC TF family is one of the largest families of plant-specific TFs.…”