Light affects tissue patterning of the hypocotyl in the shade-avoidance response


Autoři: Esther Botterweg-Paredes aff001;  Anko Blaakmeer aff001;  Shin-Young Hong aff001;  Bin Sun aff001;  Lorenzo Mineri aff001;  Valdeko Kruusvee aff001;  Yakun Xie aff004;  Daniel Straub aff005;  Delphine Ménard aff007;  Edouard Pesquet aff007;  Stephan Wenkel aff001
Působiště autorů: Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej, Denmark aff001;  NovoCrops Center, University of Copenhagen, Thorvaldsensvej, Denmark aff002;  Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark aff002;  Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark aff003;  Department of Biosciences, University of Milan, Milan, Italy aff003;  Department of Biosciences, University of Milan, Milan, Italy aff004;  Centre for Plant Molecular Biology (ZMBP), University of Tübingen, Germany aff004;  Centre for Plant Molecular Biology (ZMBP), University of Tübingen, Germany aff005;  Quantitative Biology Center (QBiC), University of Tübingen, Auf der Morgenstelle, Tübingen, Germany aff005;  Quantitative Biology Center (QBiC), University of Tübingen, Auf der Morgenstelle, Tuebingen, Germany aff006;  Microbial Ecology, Center for Applied Geoscience, University of Tübingen, Tübingen, Germany aff006;  Microbial Ecology, Center for Applied Geoscience, University of Tübingen, Tuebingen, Germany aff007;  Arrhenius Laboratories, Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden aff007;  Arrhenius Laboratories, Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, Stockholm, Sweden aff008;  NovoCrops Center, University of Copenhagen, Thorvaldsensvej, Denmark aff008
Vyšlo v časopise: Light affects tissue patterning of the hypocotyl in the shade-avoidance response. PLoS Genet 16(3): e32767. doi:10.1371/journal.pgen.1008678
Kategorie: Research Article
doi: 10.1371/journal.pgen.1008678

Souhrn

Plants have evolved strategies to avoid shade and optimize the capture of sunlight. While some species are tolerant to shade, plants such as Arabidopsis thaliana are shade-intolerant and induce elongation of their hypocotyl to outcompete neighboring plants. We report the identification of a developmental module acting downstream of shade perception controlling vascular patterning. We show that Arabidopsis plants react to shade by increasing the number and types of water-conducting tracheary elements in the vascular cylinder to maintain vascular density constant. Mutations in genes affecting vascular patterning impair the production of additional xylem and also show defects in the shade-induced hypocotyl elongation response. Comparative analysis of the shade-induced transcriptomes revealed differences between wild type and vascular patterning mutants and it appears that the latter mutants fail to induce sets of genes encoding biosynthetic and cell wall modifying enzymes. Our results thus set the stage for a deeper understanding of how growth and patterning are coordinated in a dynamic environment.

Klíčová slova:

Arabidopsis thaliana – Auxins – Gene expression – Genetically modified plants – Hypocotyl – Seedlings – Transcription factors – White light


Zdroje

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