Stacey Harmer

image of Stacey Harmer



Plant Biology

Offices and Labs

2129 Life Sciences
(530) 752-8101


1998 PhD Biochemistry University of California, San Francisco
1991 BA Biochemistry University of California, Berkeley

Research Interests

Understanding the molecular basis of circadian rhythms in plants and how these daily rhythms affect plant physiology.


American Society of Photobiology - New Investigator Award, 2004
Chancellor’s Fellow, UC Davis, 2011-2016
College of Biological Sciences Faculty Research Award, 2017

Department and Center Affiliations

Department of Plant Biology


American Society of Plant Biologists
Society for Research on Biological Rhythms

CBS Grad Group Affiliations

Integrative Genetics and Genomics
Plant Biology

Specialties / Focus

Plant Biology
  • Cell and Developmental Biology
  • Molecular Biology, Biochemistry and Genomics
Integrative Genetics and Genomics
  • Model Plants

Graduate Groups not Housed in CBS

Designated Emphasis in Biotechnology


Harmer Lab website

Teaching Interests

Plant biology, molecular biology, genetics, signal transduction.


MCB 121 Mol Bio Eukaryotic Cells (Fall)
MCB 160L Genetics Lab (Fall)


1/31/2018 6:40:51 PM
  • Harmer, S.L., and Brooks, C.J. (2017) Growth-mediated plant movements: hidden in plain sight. Current Opinion in Plant Biology. 41:89-94. doi: 10.1016/j.pbi.2017.10.003

  • Rubin, M.J., Brock, M.T., Davis, A.M., German, Z.M., Welch, S.M., Harmer, S.L., Maloof, J.N., Davis, S.J., and Weinig, C. (2017) Circadian rhythms vary over the growing season and correlate with fitness components. Molecular Ecology. 26(20):5528-5540. doi: 10.1111/mec.14287

  • Gray, J.A., Shalit-Kaneh, A., Chu, D.N., Hsu, P.Y., and Harmer, S.L. (2017) The REVEILLE clock genes inhibit growth of juvenile and adult plants by control of cell size.  Plant Physiology. 173(4):2308-2322. doi: 10.1104/pp.17.00109.

  • Müller-Moulé P., Nozue, K., Pytlak, M.L., Palmer, C.M., Covington, M.F., Wallace, A.D., Harmer,  S.L., and Maloof, J.N. (2016)  YUCCA auxin biosynthetic genes are required for Arabidopsis shade avoidance.  PeerJ. 4:e2574

  • Atamian HS, Creux NM, Brown EA, Garner AG, Blackman BK, Harmer SL. (2016) Circadian regulation of sunflower heliotropism, floral orientation, and pollinator visits. Science, 353(6299):587-90.

  • Brady SM, Burow M, Busch W, Carlborg Ö, Denby KJ, Glazebrook J, Hamilton ES, Harmer SL, Haswell ES, Maloof JN, Springer NM, Kliebenstein DJ. (2015) Reassess the t Test: Interact with All Your Data via ANOVA. The Plant Cell 27(8):2088-94.

  • Atamian HS, Harmer SL. (2016) Circadian regulation of hormone signaling and plant physiology. Plant Molecular Biology 91(6):691-702.

  • Jones, M.A., Hu, W., Litthauer, S., Lagarias, J.C. and Harmer, S.L. (2015)  A constitutively active allele of phytochrome B maintains circadian robustness in the absence of light.  Plant Physiology. pp.00782.2015; doi:10.1104/pp.15.00782

  • Vandenbrink, J.P., Brown, E.A., Harmer, S.L., and Blackman, B.K. (2014) Turning heads: the biology of solar tracking in sunflower.  Plant Sci. 224:20-6.  doi: 10.1016/j.plantsci.2014.04.006.

  • Hsu, P.Y., Devisetty, U.K., and Harmer, S.L. (2013) Cycling activators control the evening arm of the plant clock. eLife. 2:e00473. doi: 10.7554/eLife.00473.

  • Zemach, A., Kim, M.Y., Hsieh, P.-H., Coleman-Derr,D., Eshed-Williams, L., Thao, K, Harmer, S.L., and Zilberman, D. (2013) The Arabidopsis nucleosome remodeler DDM1 allows DNA methyltransferases to access H1-containing heterochromatin. Cell 153(1):193-205. doi: 10.1016/j.cell.2013.02.033.

  • Hu, W., Franklin, K.A., Sharrock, R.A., Jones, M.A., Harmer, S.L., and Lagarias, J.C. (2013) Unanticipated regulatory roles for Arabidopsis phytochromes revealed by null mutant analysis. Proceedings of the National Academy of the Sciences, 110(4) 1542-1547. doi: 10.1073/pnas.1221738110

  • Hsu, P.Y. and Harmer, S.L. (2012) Circadian phase has profound effects on differential expression analysis. PLoS One, 7(11):e49853. doi: 10.1371/journal.pone.0049853.

  • Jones, M.A., Williams, B.A., McNicol J., Simpson, C.G., Brown, J.W., and Harmer, S.L. (2012) Mutation of Arabidopsis SPLICEOSOMAL TIMEKEEPER LOCUS 1 causes circadian clock defects. Plant Cell, 24(10):4066-82. doi: 10.1105/tpc.112.104828.

  • Nozue, K., Harmer. S.L., and Maloof, J.N. (2011) Genomic analysis of circadian clock-, light-, and growth-correlated genes reveals PIF5 as a modulator of auxin signaling in Arabidopsis. Plant Physiology, 156(1): 357-372.

  • Rawat, R., Takahashi, N., Hsu, P.Y., Jones, M.A., Schwartz, J., Salemi, M.R., Phinney, B.S., and Harmer, S.L. (2011) REVEILLE8 and PSEUDO-REPONSE REGULATOR5 form a negative feedback loop within the Arabidopsis circadian clock. PLoS Genetics, 7(3): e1001350.

  • Kerwin, R.E., Jimenez-Gomez, J.M., Fulop, D., Harmer, S.L., Maloof, J.N., Kliebenstein, D.J. (2011) Network QTL mapping of circadian clock outputs identifies metabolic pathway to clock linkages in Arabidopsis. Plant Cell, 23(2):471-85.

  • Jones, M.A., and Harmer, S.L. (2011) JMJD5 functions in concert with TOC1 in the Arabidopsis circadian system. Plant Signaling & Behavior 6(3): 1-4.

  • Ellison ,C.T., Vandenbussche, F., Van Der Straeten, D., Harmer, S.L. (2010) XAP5 CIRCADIAN TIMEKEEPER regulates ethylene responses in aerial tissues of Arabidopsis. Plant Physiology, 155(2):988-999.

  • Jones, M.A., Covington, M.F., Ditacchio, L., Vollmers, C., Panda, S., Harmer, S.L. (2010) Jumonji domain protein JMJD5 functions in both the plant and human circadian systems. Proceedings of the National Academy of the Sciences 107(50): 21623-21628.

  • Harmer, S.L. (2010). Plant biology in the fourth dimension. Plant Physiology, 154:467 - 470.

  • Rawat, R., Schwartz, J., Jones, M.A., Sairanen, I., Cheng, Y., Andersson, C.R., Zhao, Y., Ljung, K., and Harmer, S.L. (2009). REVEILLE1, a Myb-like transcription factor, integrates the circadian clock and auxin pathways. Proceedings of the National Academy of the Sciences 106(39) 16883-16888.