Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley
<p>Abstract</p> <p>Background</p> <p>The transitions from juvenile to adult and adult to reproductive phases of growth are important stages in the life cycle of plants. The regulators of these transitions include miRNAs, in particular miR156 and miR172 which are part of...
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doaj-7444c4fe4d08408da8bda20d3fda86052020-11-24T21:36:18ZengBMCBMC Plant Biology1471-22292013-01-01131610.1186/1471-2229-13-6Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barleyCuraba JulienTalbot MarkLi ZhongyiHelliwell Chris<p>Abstract</p> <p>Background</p> <p>The transitions from juvenile to adult and adult to reproductive phases of growth are important stages in the life cycle of plants. The regulators of these transitions include miRNAs, in particular miR156 and miR172 which are part of a regulatory module conserved across the angiosperms. In Arabidopsis miR171 represses differentiation of axillary meristems by repressing expression of SCARECROW-LIKE(SCL) transcription factors, however the role of miR171 has not been examined in other plants.</p> <p>Results</p> <p>To investigate the roles of mir171 and its target genes in a monocot, the <it>Hvu pri-miR171a</it> was over-expressed in barley (<it>Hordeum vulgare</it> L. cv. Golden promise) leading to reduced expression of at least one <it>HvSCL</it> gene. The resulting transgenic plants displayed a pleiotropic phenotype which included branching defects, an increased number of short vegetative phytomers and late flowering. These phenotypes appear to be the consequence of changes in the organisation of the shoot meristem. In addition, the data show that miR171 over-expression alters the vegetative to reproductive phase transition by activating the miR156 pathway and repressing the expression of the <it>TRD (THIRD OUTER GLUME)</it> and <it>HvPLA1 (Plastochron1)</it> genes.</p> <p>Conclusions</p> <p>Our data suggest that some of the roles of miR171 and its target genes that have been determined in Arabidopsis are conserved in barley and that they have additional functions in barley including activation of the miR156 pathway.</p> http://www.biomedcentral.com/1471-2229/13/6BarleymiR171Scarecrow-likePhase changeMeristemsFlowering time |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Curaba Julien Talbot Mark Li Zhongyi Helliwell Chris |
spellingShingle |
Curaba Julien Talbot Mark Li Zhongyi Helliwell Chris Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley BMC Plant Biology Barley miR171 Scarecrow-like Phase change Meristems Flowering time |
author_facet |
Curaba Julien Talbot Mark Li Zhongyi Helliwell Chris |
author_sort |
Curaba Julien |
title |
Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley |
title_short |
Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley |
title_full |
Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley |
title_fullStr |
Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley |
title_full_unstemmed |
Over-expression of microRNA171 affects phase transitions and floral meristem determinancy in barley |
title_sort |
over-expression of microrna171 affects phase transitions and floral meristem determinancy in barley |
publisher |
BMC |
series |
BMC Plant Biology |
issn |
1471-2229 |
publishDate |
2013-01-01 |
description |
<p>Abstract</p> <p>Background</p> <p>The transitions from juvenile to adult and adult to reproductive phases of growth are important stages in the life cycle of plants. The regulators of these transitions include miRNAs, in particular miR156 and miR172 which are part of a regulatory module conserved across the angiosperms. In Arabidopsis miR171 represses differentiation of axillary meristems by repressing expression of SCARECROW-LIKE(SCL) transcription factors, however the role of miR171 has not been examined in other plants.</p> <p>Results</p> <p>To investigate the roles of mir171 and its target genes in a monocot, the <it>Hvu pri-miR171a</it> was over-expressed in barley (<it>Hordeum vulgare</it> L. cv. Golden promise) leading to reduced expression of at least one <it>HvSCL</it> gene. The resulting transgenic plants displayed a pleiotropic phenotype which included branching defects, an increased number of short vegetative phytomers and late flowering. These phenotypes appear to be the consequence of changes in the organisation of the shoot meristem. In addition, the data show that miR171 over-expression alters the vegetative to reproductive phase transition by activating the miR156 pathway and repressing the expression of the <it>TRD (THIRD OUTER GLUME)</it> and <it>HvPLA1 (Plastochron1)</it> genes.</p> <p>Conclusions</p> <p>Our data suggest that some of the roles of miR171 and its target genes that have been determined in Arabidopsis are conserved in barley and that they have additional functions in barley including activation of the miR156 pathway.</p> |
topic |
Barley miR171 Scarecrow-like Phase change Meristems Flowering time |
url |
http://www.biomedcentral.com/1471-2229/13/6 |
work_keys_str_mv |
AT curabajulien overexpressionofmicrorna171affectsphasetransitionsandfloralmeristemdeterminancyinbarley AT talbotmark overexpressionofmicrorna171affectsphasetransitionsandfloralmeristemdeterminancyinbarley AT lizhongyi overexpressionofmicrorna171affectsphasetransitionsandfloralmeristemdeterminancyinbarley AT helliwellchris overexpressionofmicrorna171affectsphasetransitionsandfloralmeristemdeterminancyinbarley |
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1725941841091624960 |