Stephen Wolniak




Office Phone: (301) 405-1605

Fax: (301) 314-9489

Office Address: 2204 H.J. Patterson



graduate program affiliations

  • BISI - BISI-Molecular & Cellular Biology (MOCB) 

research interests

Cell Biology: Cell motility and gametogenesis. Mechanisms involved in cell fate determination.


recent publications

C. Publications relevant to ongoing research (selected from 41 peer-reviewed publications).


Boothby. T., R.S. Zipper, C.M. van der Weele and S.M. Wolniak. (2013). Removal of Retained Introns Regulates Translation in the Rapidly Developing Gametophyte of M. vestita. Develop. Cell 24: 517-529  (Journal Cover: F1000-Prime Recommended)


Boothby. T. and S.M. Wolniak. (2011). Masked centrin mRNA is stored with aggregated nuclear speckles and its asymmetric redistribution requires a homolog of Mago nashi, BMC Cell Biol.12: 45


Wolniak, S.M., C.M. van der Weele, F. Deeb, T. Boothby and V.P. Klink. (2011). Extremes in Rapid cellular morphogenesis: post-transcriptional regulation of spermatogenesis in Marsilea vestita. Protoplasma 248: 237-244. (Journal cover)


Deeb, F., C.M. van der Weele and S.M. Wolniak. 2010. Spermidine as a morphogenetic determinant for cell fate specification in the male gametophyte of Marsilea. Plant Cell 22: 3678-3691. epub: [Journal Cover 22, no. 11] 


van der Weele, C.M., C. –W. Tsai, and S.M. Wolniak. (2007). Mago nashi is essential for spermatogenesis in Marsilea. Mol. Biol. Cell. 18: 3711-3722 (cover).


Tsai, C.W., C.M. van der Weele and S.M. Wolniak. 2004. Differential segregation and modification of mRNA during spermiogenesis in Marsilea vestita. Develop. Biol. 269: 319- 330.


Klink, V.P. and S.M. Wolniak. 2003. Changes in the abundance and distribution of conserved centrosomal, cytoskeletal and ciliary proteins during spermiogenesis in Marsilea vestita. Cell Motil. Cytoskelet. 56: 57-73


Tsai, C.W. and S.M. Wolniak. (2001). Cell cycle arrest allows centrin translation but not basal body formation during spermiogenesis in Marsilea. J. Cell Sci. 114: 4265-4272 [Cover 114(23)].


Klink, V.P. and S.M. Wolniak. 2001. Centrin is necessary for the formation of the motile apparatus in spermatids of Marsilea. Mol. Biol. Cell 12: 761-776.


Wolniak, S.M., V.P. Klink, P.E. Hart and C.-W. Tsai. 2000. Control of the development and motility in the spermatozoids of lower plants. Grav. Sp. Biol. Bull. 13: 85-93.


Hart, P. and S.M. Wolniak. 1999. Molecular cloning of a centrin homolog from Marsilea vestita and evidence for its translational control during spermiogenesis. Biochem. Cell Biol. 77: 101-108.


Hart, P.E. and S.M. Wolniak. (1998). Spermiogenesis in Marsilea vestita: a temporal correlation between centrin expression and blepharoplast differentiation. Cell Motil. Cytoskelet. 41: 39-48.



Ph.D. Botany, University of California, Berkeley, 1979