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Regulation of inflorescence architecture by inter-tissue-layer ligand-receptor communication between endodermis and phloem

ABSTRACT: Inflorescence architecture of Arabidopsis thaliana is regulated by ER-EPFL4/6 signaling module. To analyze the genes governed by this module, the transcriptional profiles of er-2 (allelic to er-106) mutant and epfl4 epfl6 double mutant were investigated. 9 samples are included in this study. Three biological replicates of 33 d post germination inflorescence tips of er-2 (allelic to er-106, Lease et al., 2001) and epfl4 epfl6 were compared with wild type (Col-0) sample for changes in gene expression.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Keiko Torii

PROVIDER: E-GEOD-35166 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Regulation of inflorescence architecture by intertissue layer ligand-receptor communication between endodermis and phloem.

Uchida Naoyuki N Lee Jin Suk JS Horst Robin J RJ Lai Hung-Hsueh HH Kajita Ryoko R Kakimoto Tatsuo T Tasaka Masao M Torii Keiko U KU

Proceedings of the National Academy of Sciences of the United States of America 20120402 16

Multicellular organisms achieve final body shape and size by coordinating cell proliferation, expansion, and differentiation. Loss of function in the Arabidopsis ERECTA (ER) receptor-kinase gene confers characteristic compact inflorescence architecture, but its underlying signaling pathways remain unknown. Here we report that the expression of ER in the phloem is sufficient to rescue compact er inflorescences. We further identified two Epidermal Patterning Factor-like (EPFL) secreted peptide gen ...[more]

PMID: 22474391

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Regulation of inflorescence architecture by inter-tissue-layer ligand-receptor communication between endodermis and phloem

Project description:Inflorescence architecture of Arabidopsis thaliana is regulated by ER-EPFL4/6 signaling module. To analyze the genes governed by this module, the transcriptional profiles of er-2 (allelic to er-106) mutant and epfl4 epfl6 double mutant were investigeted.

2012-03-28 | GSE35166 | GEO

Regulation of inflorescence architecture by intertissue layer ligand-receptor communication between endodermis and phloem.

Project description:Multicellular organisms achieve final body shape and size by coordinating cell proliferation, expansion, and differentiation. Loss of function in the Arabidopsis ERECTA (ER) receptor-kinase gene confers characteristic compact inflorescence architecture, but its underlying signaling pathways remain unknown. Here we report that the expression of ER in the phloem is sufficient to rescue compact er inflorescences. We further identified two Epidermal Patterning Factor-like (EPFL) secreted peptide genes, EPFL4 and EPFL6/CHALLAH (CHAL), as redundant, upstream components of ER-mediated inflorescence growth. The expression of EPFL4 or EPFL6 in the endodermis, a layer adjacent to phloem, is sufficient to rescue the er-like inflorescence of epfl4 epfl6 plants. EPFL4 and EPFL6 physically associate with ER in planta. Finally, transcriptome analysis of er and epfl4 epfl6 revealed a potential downstream component as well as a role for plant hormones in EPFL4/6- and ER-mediated inflorescence growth. Our results suggest that intercell layer communication between the endodermis and phloem mediated by peptide ligands and a receptor kinase coordinates proper inflorescence architecture in Arabidopsis.

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