Thick tassel dwarf1 encodes a putative maize ortholog of the Arabidopsis CLAVATA1 leucine-rich repeat receptor-like kinase

Bommert, P., Lunde, C., Nardmann, J., Vollbrecht, E., Running, M., Jackson, D. P., Hake, S., Werr, W. (March 2005) Thick tassel dwarf1 encodes a putative maize ortholog of the Arabidopsis CLAVATA1 leucine-rich repeat receptor-like kinase. Development, 132 (6). pp. 1235-1245. ISSN 0950-1991

DOI: 10.1242/dev.01671


Development in higher plants depends on the activity of meristems, formative regions that continuously initiate new organs at their flanks. Meristems must maintain a balance between stem cell renewal and organ initiation. In fasciated mutants, organ initiation fails to keep pace with meristem proliferation. The thick tassel dwarf1 (td1) mutation of maize affects both male and female inflorescence development. The female inflorescence, which results in the ear, is fasciated, with extra rows of kernels. The male inflorescence, or tassel, shows an increase in spikelet density. Floral meristems are also affected in td1 mutants; for example, male florets have an increase in stamen number. These results suggest that td1 functions in the inflorescence to limit meristem size. In addition, td1 mutants are slightly shorter than normal siblings, indicating that td1 also plays a role in vegetative development. td1 encodes a leucine-rich repeat receptor-like kinase (LRR-RLK) that is a putative ortholog of the Arabidopsis CLAVATA1 protein. These results complement previous work showing that fasciated ear2 encodes a CLAVATA2-like protein, and suggest that the CLAVATA signaling pathway is conserved in monocots. td1 maps in the vicinity of quantitative trait loci that affect seed row number, spikelet density and plant height. We discuss the possible selection pressures on td1 during maize domestication.

Item Type: Paper
Uncontrolled Keywords: meristem stem cells inflorescence thick tassel dwarf1 maize SHOOT APICAL MERISTEM shoot apical meristem STEM-CELL FATE stem cell fate HOMEOBOX GENE homeobox gene REGULATE regulate MERISTEM meristem ORGAN DEVELOPMENT organ development ZEA-MAYS Zea mays CLAVATA1 Clavata1 PROTEIN protein KNOTTED1 knotted1 WUSCHEL wuschel
Subjects: organism description > plant > Arabidopsis
organism description > plant > maize
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > enzymes > kinase
organs, tissues, organelles, cell types and functions > tissues types and functions > meristem
therapies > stem cells
CSHL Authors:
Communities: CSHL labs > Jackson lab
Depositing User: CSHL Librarian
Date: March 2005
Date Deposited: 04 Apr 2012 20:30
Last Modified: 01 Mar 2013 19:15
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