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Gene Review:

EMS1 - leucine-rich repeat receptor protein...

Arabidopsis thaliana

Synonyms: EXCESS MICROSPOROCYTES1, EXS, EXTRA SPOROGENOUS CELLS, T28J14.220, T28J14_220

Canales, C. et al., Zhao, D.Z. et al., Yang, S.L. et al., Yang, S.L. et al., Wang, Y. et al., et al.

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High impact information on EMS1

Although the meiotic nuclear division in the ems1 mutant is normal, the microsporocytes do not undergo cytokinesis, resulting in failed microsporogenesis and male sterility [1].
The excess microsporocytes1 gene encodes a putative leucine-rich repeat receptor protein kinase that controls somatic and reproductive cell fates in the Arabidopsis anther [1].
Arabidopsis SHORT HYPOCOTYL UNDER BLUE1 contains SPX and EXS domains and acts in cryptochrome signaling [2].
These data suggest that the TPD1 product plays an important role in the differentiation of tapetal cells, possibly in coordination with the EMS1/EXS gene product, a Leu-rich repeat receptor protein kinase [3].
In the young seed, EXS affects cell size in the embryo and the rate at which it develops [4].

Biological context of EMS1

EXS, a putative LRR receptor kinase, regulates male germline cell number and tapetal identity and promotes seed development in Arabidopsis [4].
Consistent with the observed phenotype, EXS is expressed in the inflorescence meristem, floral apices, anthers, and in developing seeds [4].
The Arabidopsis genome contains additional proteins of unknown function containing either a SPX or an EXS domain [5].

Regulatory relationships of EMS1

This result further suggests that TPD1 regulates cell fates in coordination with EMS1/EXS [6].

Other interactions of EMS1

The tpd1 mutant is phenotypically identical to the excess microsporocytes1 (ems1)/extra sporogenous cells (exs) mutant [6].

References

The excess microsporocytes1 gene encodes a putative leucine-rich repeat receptor protein kinase that controls somatic and reproductive cell fates in the Arabidopsis anther. Zhao, D.Z., Wang, G.F., Speal, B., Ma, H. Genes Dev. (2002) [Pubmed]
Arabidopsis SHORT HYPOCOTYL UNDER BLUE1 contains SPX and EXS domains and acts in cryptochrome signaling. Kang, X., Ni, M. Plant Cell (2006) [Pubmed]
Tapetum determinant1 is required for cell specialization in the Arabidopsis anther. Yang, S.L., Xie, L.F., Mao, H.Z., Puah, C.S., Yang, W.C., Jiang, L., Sundaresan, V., Ye, D. Plant Cell (2003) [Pubmed]
EXS, a putative LRR receptor kinase, regulates male germline cell number and tapetal identity and promotes seed development in Arabidopsis. Canales, C., Bhatt, A.M., Scott, R., Dickinson, H. Curr. Biol. (2002) [Pubmed]
Structure and expression profile of the Arabidopsis PHO1 gene family indicates a broad role in inorganic phosphate homeostasis. Wang, Y., Ribot, C., Rezzonico, E., Poirier, Y. Plant Physiol. (2004) [Pubmed]
Overexpression of TAPETUM DETERMINANT1 alters the cell fates in the Arabidopsis carpel and tapetum via genetic interaction with excess microsporocytes1/extra sporogenous cells. Yang, S.L., Jiang, L., Puah, C.S., Xie, L.F., Zhang, X.Q., Chen, L.Q., Yang, W.C., Ye, D. Plant Physiol. (2005) [Pubmed]

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