Meta-analysis of the effect of expression of MYB transcription factor genes on abiotic stress

Abstract

Background MYB proteins are a large group of transcription factors. The overexpression of MYB genes has been reported to improve abiotic stress tolerance in plant. However, due to the variety of plant species studied and the types of gene donors/recipients, along with different experimental conditions, it is difficult to interpret the roles of MYB in abiotic stress tolerance from published data. Methods Using meta-analysis approach, we investigated the plant characteristics involved in cold, drought, and salt stress in MYB-overexpressing plants and analyzed the degrees of influence on plant performance by experimental variables. Results The results show that two of the four measured plant parameters in cold-stressed plants, two of the six in drought-stressed, and four of the 13 in salt-stressed were significantly impacted by MYB overexpression by 22% or more, and the treatment medium, donor/recipient species, and donor type significantly influence the effects of MYB-overexpression on drought stress tolerance. Also, the donor/recipient species, donor type, and stress duration all significantly affected the extent of MYB-mediated salt stress tolerance. In summary, this study compiles and analyzes the data across studies to help us understand the complex interactions that dictate the efficacy of heterologous MYB expression designed for improved abiotic stress tolerance in plants.

Plant hormone crosstalk mediated by humic acids

“…The role of MYBs in root development and differentiation has been previously reported [180]. It involves the control of cell cycle progression at the root tips [129] and the expression of auxin-inducible genes regulating lateral root formation [181].…”

Transcriptome sequencing and differential expression analysis of natural and BTH-treated wound healing in potato tubers (Solanum tuberosum L.)

“…These transcription factors include MYB , NAC and WRKY , which are encoded by a large number of genes. MYB transcription factors serve as one of the largest family genes and act as crucial regulators by controlling gene expression in plant development and stress responses [ 33 ]. There are 233 MYB family members that have been identified and analyzed in the potato genome and were found to confer different responses to abiotic and biotic stresses [ 34 ].…”

Proline Metabolism Genes in Transgenic Plants: Meta-Analysis under Drought and Salt Stress

“…We used the natural logarithm of the response ratio (ln R R ) as an effect size, ln R R = ln Rt Rc where Rt is the mean of transgenic plants, and Rc is the mean of non-transgenic control plants. The response ratio is frequently used in plant biology because, being a dimensionless measure, can be used across different studies and with different measure units [26][27][28]. Moreover, the natural logarithm of the response ratio allows for symmetrical distribution and ease of interpretation, with values greater than zero indicating a positive effect, values less than zero indicating a negative effect, and a value of zero indicating no effect [29].…”