MYB transcription factor genes as regulators for plant responses: an overview

Abstract

Regulation of gene expression at the level of transcription controls many crucial biological processes. Transcription factors (TFs) play a great role in controlling cellular processes and MYB TF family is large and involved in controlling various processes like responses to biotic and abiotic stresses, development, differentiation, metabolism, defense etc. Here, we review MYB TFs with particular emphasis on their role in controlling different biological processes. This will provide valuable insights in understanding regulatory networks and associated functions to develop strategies for crop improvement.

A reverse genetics approach identifies novel mutants in light responses and anthocyanin metabolism in petunia

“…Further physiological and molecular investigations of the identified mutant allele will help to elucidate the control of developmental transitions in facultative long-day petunia. Anthocyanin biosynthesis and regulation have been intensively studied in petunia (Winkel-Shirley 2001;Koes et al 2005;Ambawat et al 2013). Genetic analyses of flower color mutants have been instrumental to the identification of several structural and regulatory genes in the species (Koes et al 2005;Ambawat et al 2013).…”

“…Anthocyanin biosynthesis and regulation have been intensively studied in petunia (Winkel-Shirley 2001;Koes et al 2005;Ambawat et al 2013). Genetic analyses of flower color mutants have been instrumental to the identification of several structural and regulatory genes in the species (Koes et al 2005;Ambawat et al 2013). In a large number of higher plant species, the activity of chalcone synthase displays gene redundancy and it is encoded by at least nine genes in Medicago truncatula, three in grapevine, two in maize and only one in Antirrhinum (Desnos et al 2001;Koes et al 2005;Abe and Morita 2010).…”

“…1d, Table S4). All classes of transcription factor families demonstrated to be involved in the regulation of the pathway in Arabidopsis and maize were found in petunia, namely; WRYK, WD-40, MADS, MYB, HLH and Zinc finger (Koes et al 2005;Ambawat et al 2013) (Fig. 1d, Table S4).…”

“…Anthocyanin biosynthesis occurs via a branch of the flavonoid pathway and consists of a well-known sequence of enzymatic steps, studied in Antirrhinum majus, A. thaliana, Petunia and Zea mays (Koes et al 2005). The activity of anthocyanin biosynthetic genes is largely regulated at the transcriptional level via the function of several classes of transcriptional regulators, such as: WD40, helix-loop-helix (HLH), R2R3 and R3 MYB, WRYK, Zn finger and MADSbox (Koes et al 2005;Ambawat et al 2013). In several plant species, light has been demonstrated to be an important environmental factor controlling anthocyanin accumulation, directly via transcriptional control of biosynthetic genes and transcription factors or indirectly via developmental regulation (Albert et al 2009;Lopez et al 2012;Petroni and Tonelli 2011;Huang et al 2012;Ambawat et al 2013).…”

Respuesta transcripcional de Populus a bifenilos policlorados: Aspectos aplicados a la fitorremediación

“…Esta familia tiene un número variable de dominios MYB. La región C-terminal puede contener elementos para la activación o represión transcripcional (Ambawat et al, 2013). El criterio de clasificación de estas proteínas está basado en el número de dominios MYB presentes en sus secuencias, variando de uno a cuatro.…”