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Identification and molecular characterization of MYB transcription factor superfamily in C4 model plant foxtail millet (Setaria italica L.)

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Title Identification and molecular characterization of MYB transcription factor superfamily in C4 model plant foxtail millet (Setaria italica L.)
 
Creator Muthamilarasan, Mehanathan
Khandelwal, Rohit
Yadav, Chandra Bhan
Bonthala, Venkata Suresh
Khan, Yusuf
Prasad, Manoj
 
Subject Foxtail Millet (Setaria italica L.)
 
Description Accepted date: September 6, 2014
MYB proteins represent one of the largest transcription factor families in plants, playing important roles in diverse developmental and stress-responsive processes. Considering its significance, several genome-wide analyses have been conducted in almost all land plants except foxtail millet. Foxtail millet (Setaria italica L.) is a model crop for investigating systems biology of millets and bioenergy grasses. Further, the crop is also known for its potential abiotic stress-tolerance. In this context, a comprehensive genome-wide survey was conducted and 209 MYB protein-encoding genes were identified in foxtail millet. All 209 S. italica MYB (SiMYB) genes were physically mapped onto nine chromosomes of foxtail millet. Gene duplication study showed that segmental- and tandem-duplication have occurred in genome resulting in expansion of this gene family. The protein domain investigation classified SiMYB proteins into three classes according to number of MYB repeats present. The phylogenetic analysis categorized SiMYBs into ten groups (I-X). SiMYB-based comparative mapping revealed a maximum orthology between foxtail millet and sorghum, followed by maize, rice and Brachypodium. Heat map analysis showed tissue-specific expression pattern of predominant SiMYB genes. Expression profiling of candidate MYB genes against abiotic stresses and hormone treatments using qRT-PCR revealed specific and/or overlapping expression patterns of SiMYBs. Taken together, the present study provides a foundation for evolutionary and functional characterization of MYB TFs in foxtail millet to dissect their functions in response to environmental stimuli.
This work was financially supported by the core grant of National Institute of Plant Genome Research (NIPGR), New Delhi, India. The funder had no role
in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
 
Date 2015-12-18T06:58:13Z
2015-12-18T06:58:13Z
2014
 
Type Article
 
Identifier PLoS One, 9(10): e109920
1932-6203
http://172.16.0.77:8080/jspui/handle/123456789/434
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0109920
10.1371/journal.pone.0109920
 
Language en_US
 
Publisher PLOS