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Functional specialization of duplicated AP3-like genes in Medicago truncatula.
MedLine Citation:
PMID:  23146152     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The B-class of MADS-box genes has been studied in a wide range of plant species, but it has remained largely uncharacterized in legumes. Here we investigate the evolutionary fate of the duplicated AP3-like genes of a legume species. To gain insight into the extent to which B-class MADS-box gene functions are conserved or have diversified in legumes, we have isolated and characterized the two members of the AP3 lineage in Medicago truncatula: MtNMH7 and MtTM6 (euAP3 and paleoAP3 genes respectively). A non-overlapping and complementary expression pattern of both genes is observed in petals and stamens. MtTM6 was expressed predominantly in the outer cell layers of both floral organs and MtNMH7 in the inner cell layers of petals and stamens. Functional analyses by reverse genetics approaches (RNAi and Tnt1 mutagenesis) showed that the relative contribution of MtNMH7 to petal identity is more important than that of MtTM6, whereas MtTM6 plays a more important role in stamen identity than its paralog MtNMH7. Our results suggest that the M. truncatula AP3-like genes have undergone a functional specialization process associated to a complete partitioning of gene expression patterns of the ancestral gene lineage. We provide information regarding the similarities and differences in petal and stamen development among core eudicots. © 2012 The Authors. The Plant Journal © 2012 Blackwell Publishing Ltd.
Authors:
Edelín Roque; Joanna Serwatowska; María Cruz Rochina; Jiangqi Wen; Kirankumar S Mysore; Lynne Yenush; José Pío Beltrán; Luis A Cañas
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-12
Journal Detail:
Title:  The Plant journal : for cell and molecular biology     Volume:  -     ISSN:  1365-313X     ISO Abbreviation:  Plant J.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9207397     Medline TA:  Plant J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Authors. The Plant Journal © 2012 Blackwell Publishing Ltd.
Affiliation:
Instituto de Biología Molecular y Celular de Plantas (CSIC-UPV), Ciudad Politécnica de la Innovación, Edf. 8E. C/ Ingeniero Fausto Elio s/n, E-46011, Valencia, Spain.
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