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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 6 - Molecular Biology (D. Weigel)     Display Documents



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ID: 706646.0, MPI für Entwicklungsbiologie / Abteilung 6 - Molecular Biology (D. Weigel)
Temporal control of leaf complexity by miRNA-regulated licensing of protein complexes
Authors:Rubio-Somoza, I.; Zhou, C. M.; Confraria, A.; Martinho, C.; von Born, P.; Baena-Gonzalez, E.; Wang, J. W.; Weigel, D.
Date of Publication (YYYY-MM-DD):2014-11-17
Title of Journal:Current Biology
Journal Abbrev.:Curr Biol
Volume:24
Issue / Number:22
Start Page:2714
End Page:2719
Sequence Number of Article:25448000
Review Status:Internal review
Audience:Experts Only
Abstract / Description:The tremendous diversity of leaf shapes has caught the attention of naturalists for centuries. In addition to interspecific and intraspecific differences, leaf morphologies may differ in single plants according to age, a phenomenon known as heteroblasty. In Arabidopsis thaliana, the progression from the juvenile to the adult phase is characterized by increased leaf serration. A similar trend is seen in species with more complex leaves, such as the A. thaliana relative Cardamine hirsuta, in which the number of leaflets per leaf increases with age. Although the genetic changes that led to the overall simpler leaf architecture in A. thaliana are increasingly well understood, less is known about the events underlying age-dependent changes within single plants, in either A. thaliana or C. hirsuta. Here, we describe a conserved miRNA transcription factor regulon responsible for an age-dependent increase in leaf complexity. In early leaves, miR319-targeted TCP transcription factors interfere with the function of miR164-dependent and miR164-independent CUC proteins, preventing the formation of serrations in A. thaliana and of leaflets in C. hirsuta. As plants age, accumulation of miR156-regulated SPLs acts as a timing cue that destabilizes TCP-CUC interactions. The destabilization licenses activation of CUC protein complexes and thereby the gradual increase of leaf complexity in the newly formed organs. These findings point to posttranslational interaction between unrelated miRNA-targeted transcription factors as a core feature of these regulatory circuits.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Entwicklungsbiologie/Abteilung 6 - Molekulare Biologie (Detlef Weigel)
External Affiliations:National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200032 Shanghai, China. Instituto Gulbenkian de Ciencia, 2780-156 Oeiras, Portugal. Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076 Tubingen, Germany; National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200032 Shanghai, China. Electronic address: jwwang@sibs.ac.cn. Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076 Tubingen, Germany. Electronic address: weigel@weigelworld.org.
Identifiers:ISSN:1879-0445 (Electronic) 0960-9822 (Linking) %R 10.1... [ID No:1]
URL:http://www.ncbi.nlm.nih.gov/pubmed/25448000 [ID No:2]
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