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Type: Journal article
Title: Differential expression of seven conserved microRNAs in response to abiotic stress and their regulatory network in Helianthus annuus
Author: Khaksefidi, R.
Mirlohi, S.
Khalaji, F.
Fakhari, Z.
Shiran, B.
Fallahi, H.
Rafiei, F.
Budak, H.
Ebrahimie, E.
Citation: Frontiers in Plant Science, 2015; 6(Sep):741-1-741-14
Publisher: Frontiers Media SA
Issue Date: 2015
ISSN: 1664-462X
Statement of
Reyhaneh Ebrahimi Khaksefidi, Shirin Mirlohi, Fahimeh Khalaji, Zahra Fakhari, Behrouz Shiran, Hossein Fallahi, Fariba Rafiei, Hikmet Budak, and Esmaeil Ebrahimie
Abstract: Biotic and abiotic stresses affect plant development and production through alternation of the gene expression pattern. Gene expression itself is under the control of different regulators such as miRNAs and transcription factors (TFs). MiRNAs are known to play important roles in regulation of stress responses via interacting with their target mRNAs. Here, for the first time, seven conserved miRNAs, associated with drought, heat, salt and cadmium stresses were characterized in sunflower. The expression profiles of miRNAs and their targets were comparatively analyzed between leaves and roots of plants grown under the mentioned stress conditions. Gene ontology analysis of target genes revealed that they are involved in several important pathways such as auxin and ethylene signaling, RNA mediated silencing and DNA methylation processes. Gene regulatory network highlighted the existence of cross-talks between these stress-responsive miRNAs and the other stress responsive genes in sunflower. Based on network analysis, we suggest that some of these miRNAs in sunflower such as miR172 and miR403 may play critical roles in epigenetic responses to stress. It seems that depending on the stress type, theses miRNAs target several pathways and cellular processes to help sunflower to cope with drought, heat, salt and cadmium stress conditions in a tissue-associated manner.
Keywords: abiotic stress
regulatory network
sunflower (Helianthus annuus)
Rights: © 2015 Ebrahimi Khaksefidi, Mirlohi, Khalaji, Fakhari, Shiran, Fallahi, Rafiei, Budak and Ebrahimie. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
DOI: 10.3389/fpls.2015.00741
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