Architecture of floral branch systems in maize and related grasses

Vollbrecht, E., Springer, P. S., Goh, L., Buckler, E. S. th, Martienssen, R. (August 2005) Architecture of floral branch systems in maize and related grasses. Nature, 436 (7054). pp. 1119-26. ISSN 1476-4687 (Electronic)

URL: http://www.ncbi.nlm.nih.gov/pubmed/16041362
DOI: 10.1038/nature03892

Abstract

The external appearance of flowering plants is determined to a large extent by the forms of flower-bearing branch systems, known as inflorescences, and their position in the overall structure of the plant. Branches and branching patterns are produced by tissues called shoot apical meristems. Thus, inflorescence architecture reflects meristem number, arrangement and activity, and the duration of meristem activity correlates with branch length. The inflorescences of maize, unlike those of related grasses such as rice and sorghum, predominantly lack long branches, giving rise to the tassel and familiar corncob. Here we report the isolation of the maize ramosa1 gene and show that it controls inflorescence architecture. Through its expression in a boundary domain near the nascent meristem base, ramosa1 imposes short branch identity as branch meristems are initiated. A second gene, ramosa2, acts through ramosa1 by regulating ramosa1 gene expression levels. ramosa1 encodes a transcription factor that appears to be absent in rice, is heterochronically expressed in sorghum, and may have played an important role in maize domestication and grass evolution.

Item Type: Paper
Uncontrolled Keywords: Alleles Amino Acid Sequence Base Sequence Cloning Molecular Evolution Molecular Flowers anatomy histology genetics growth & development metabolism Gene Expression Profiling Gene Expression Regulation Plant Genes Plant genetics Molecular Sequence Data Phenotype Plant Proteins chemistry genetics metabolism Poaceae anatomy histology genetics growth development metabolism RNA, Plant genetics metabolism Transcription Factors genetics metabolism Zea mays anatomy histology genetics growth development metabolism
Subjects: organism description > plant > maize
organs, tissues, organelles, cell types and functions > tissues types and functions > apical meristem
organs, tissues, organelles, cell types and functions > tissues types and functions > inflorescence
CSHL Authors:
Communities: CSHL labs > Martienssen lab
Depositing User: CSHL Librarian
Date: 25 August 2005
Date Deposited: 21 Dec 2011 15:37
Last Modified: 09 Apr 2014 20:57
Related URLs:
URI: http://repository.cshl.edu/id/eprint/22729

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