A Maize Glutaredoxin Gene, Abphyl2, Regulates Shoot Meristem Size and Phyllotaxy

Yang, F., Bui, H. T., Pautler, M., Llaca, V., Johnston, R., Lee, B. H., Kolbe, A., Sakai, H., Jackson, D. (January 2015) A Maize Glutaredoxin Gene, Abphyl2, Regulates Shoot Meristem Size and Phyllotaxy. Plant Cell, 27 (1). pp. 121-131. ISSN 1040-4651

URL: http://www.ncbi.nlm.nih.gov/pubmed/25616873
DOI: 10.1105/tpc.114.130393

Abstract

Phyllotaxy describes the geometric arrangement of leaves and is important for plant productivity. Auxin is well known to regulate phyllotactic patterns via PIN1-dependent auxin polar transport, and studies of maize (Zea mays) aberrant phyllotaxy1 (abph1) mutants suggest the importance of auxin and cytokinin signaling for control of phyllotaxy. However, whether additional regulators control these patterns is poorly understood. Here, we report a new dominant maize mutant, Aberrant phyllotaxy2 (Abph2), in which the shoot meristems are enlarged and the phyllotactic pattern switches from alternate to decussate. Map-based cloning revealed that the Abph2 mutation was caused by transposition of a glutaredoxin gene, MALE STERILE CONVERTED ANTHER1 (MSCA1), which gained an altered expression pattern in Abph2 mutant embryos. msca1 loss-of-function mutants have reduced meristem size and revealed a novel function of glutaredoxins in meristem growth. In addition, MSCA1 interacts with a TGA transcription factor, FASCIATED EAR4, suggesting a novel regulatory module for regulating shoot meristem size.

Item Type: Paper
Subjects: organism description > plant > maize
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > genes, structure and function > gene expression
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > genes, structure and function
organs, tissues, organelles, cell types and functions > tissues types and functions > meristem
CSHL Authors:
Communities: CSHL labs > Jackson lab
Watson School > Publications
Depositing User: Matt Covey
Date: 23 January 2015
Date Deposited: 30 Jan 2015 19:48
Last Modified: 07 Apr 2015 19:18
PMCID: PMC4330572
Related URLs:
URI: http://repository.cshl.edu/id/eprint/31170

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