Document Detail

The BAM1/BAM2 receptor-like kinases are important regulators of Arabidopsis early anther development.
MedLine Citation:
PMID:  16751349     Owner:  NLM     Status:  MEDLINE    
Anther development involves the formation of several adjacent cell types required for normal male fertility. Only a few genes are known to be involved in early anther development, particularly in the establishment of these different cell layers. Arabidopsis thaliana BAM1 (for BARELY ANY MERISTEM) and BAM2 encode CLAVATA1-related Leu-rich repeat receptor-like kinases that appear to have redundant or overlapping functions. We characterized anther development in the bam1 bam2 flowers and found that bam1 bam2 anthers appear to be abnormal at a very early stage and lack the endothecium, middle, and tapetum layers. Analyses using molecular markers and cytological techniques of bam1 bam2 anthers revealed that cells interior to the epidermis acquire some characteristics of pollen mother cells (PMCs), suggesting defects in cell fate specification. The pollen mother-like cells degenerate before the completion of meiosis, suggesting that these cells are defective. In addition, the BAM1 and BAM2 expression pattern supports both an early role in promoting somatic cell fates and a subsequent function in the PMCs. Therefore, analysis of BAM1 and BAM2 revealed a cell-cell communication process important for early anther development, including aspects of cell division and differentiation. This finding may have implications for the evolution of multiple signaling pathways in specifying cell types for microsporogenesis.
Carey L H Hord; Changbin Chen; Brody J Deyoung; Steven E Clark; Hong Ma
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-06-02
Journal Detail:
Title:  The Plant cell     Volume:  18     ISSN:  1040-4651     ISO Abbreviation:  Plant Cell     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-06-30     Completed Date:  2007-05-18     Revised Date:  2012-06-29    
Medline Journal Info:
Nlm Unique ID:  9208688     Medline TA:  Plant Cell     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1667-80     Citation Subset:  IM    
Department of Biology and the Huck Institutes for the Life Sciences, Pensylvania State University, University Park, Pensylvania 16802, USA.
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MeSH Terms
Arabidopsis* / anatomy & histology,  growth & development
Arabidopsis Proteins / classification,  genetics,  metabolism*
Biological Evolution
Cell Differentiation
Cell Division / physiology
Flowers / growth & development*,  ultrastructure
Meiosis / physiology
Molecular Sequence Data
Nuclear Proteins / genetics,  metabolism
Protein Kinases / classification,  genetics,  metabolism*
Protein-Serine-Threonine Kinases / genetics,  metabolism*
Repressor Proteins / genetics,  metabolism
Signal Transduction / physiology
Grant Support
R01 GM-62962-05/GM/NIGMS NIH HHS; R01 GM-63871-01/GM/NIGMS NIH HHS
Reg. No./Substance:
0/Arabidopsis Proteins; 0/Nuclear Proteins; 0/Repressor Proteins; 0/SPL protein, Arabidopsis; EC 2.7.-/Protein Kinases; EC 2.7.1.-/EMS1 protein, Arabidopsis; EC protein, Arabidopsis; EC protein, Arabidopsis; EC Kinases

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