Questions? AskAuckland

Dr Karine Myriam David

PhD, Plant Biology

Profile Image
Senior Lecturer

Research | Current

The hormone signalling group

My group is investigating the factors controlling early fruit development in kiwifruit and apple. We are particularly interested in the factors controlling fruit size, focusing on the role of plant hormones and key fruit-size related genes.

The approaches we use are multidisciplinary and combine physiology, genetics, molecular biology and biochemistry.

Current projects

1. Kiwifruit size regulation
Kiwifruit are the second largest horticultural export for New Zealand, with exports in 2015 at 1.4 billion NZ dollars. Advancement of new cultivars includes developing fruit with a minimum weight of 100g. While mechanisms controlling fruit size start to be understood in tomato, very little is known about fruit size regulation in kiwifruit at the molecular level. The aim of this project is to identify and characterise kiwifruit genes regulating fruit size, using data from other species. We focus on hormone-related genes (homeostasis, signalling), cell division and cell expansion related genes.

‚Äč2. Apple fruit texture

Two main factors affect this character - cell size and cell-wall rigidity. Both are partly controlled by the plant hormone auxin. We are deciphering the role of auxin during apple fruit development. We aim to understand the mechanisms controlling cell expansion during apple fruit development to eventually improve the quality of fruit texture. These projects are developed in collaboration with Dr R. Schaffer (Plant and Food Research) and AP John Ross (University of Tasmania, Australia).

Lab members

  • Nicky Read (PhD student): Identification and characteristion of genes ocntrolling fruit size in kiwifruit
  • David Reeves (BTech Hnours): Roles of CEP peptide on tomato fruit dvelopment
  • Wendy Payne (Teaching technician)
  • Rosemary Bellamy (honorary research fellow)

Postgraduate supervision

Research projects in the hormone signaling lab can be based in the School of Biological Sciences or carried out with collaborators at Plant and Food Research (Mt Albert).

Areas of expertise

Plant Molecular Science

Selected publications and creative works (Research Outputs)

  • Wei, Q., Du, L., Wang, W., Hu, T., Hu, H., Wang, J., ... Bao, C. (2019). Comparative Transcriptome Analysis in Eggplant Reveals Selection Trends during Eggplant Domestication. International journal of genomics, 201910.1155/2019/7924383
  • Gunaseelan, K., McAtee, P. A., Nardozza, S., Pidakala, P., Wang, R., David, K., ... Schaffer, R. J. (2019). Copy number variants in kiwifruit ETHYLENE RESPONSE FACTOR/APETALA2 (ERF/AP2)-like genes show divergence in fruit ripening associated cold and ethylene responses in C-REPEAT/DRE BINDING FACTOR-like genes. PloS one, 14 (5)10.1371/journal.pone.0216120
    Other University of Auckland co-authors: Robert Schaffer
  • Chen, Y., Grimplet, J., David, K., Castellarin, S. D., Terol, J., Wong, D. C. J., ... Talon, M. (2018). Ethylene receptors and related proteins in climacteric and non-climacteric fruits. Plant science, 276, 63-72. 10.1016/j.plantsci.2018.07.012
    Other University of Auckland co-authors: Robert Schaffer
  • Pilkington, S. M., Crowhurst, R., Hilario, E., Nardozza, S., Fraser, L., Peng, Y., ... Deroles, S. C. (2018). A manually annotated Actinidia chinensis var. chinensis (kiwifruit) genome highlights the challenges associated with draft genomes and gene prediction in plants. BMC genomics, 19 (1)10.1186/s12864-018-4656-3
    Other University of Auckland co-authors: Robert Schaffer, Andrew Allan
  • David, K. M. (2017). Cell division and cell differentiation. In B. Thomas, B. G. Murray, D. J. Murphy (Eds.) Encyclopedia of applied plant sciences (pp. 149-154). Waltham, MA, USA: Academic Press. 10.1016/B978-0-12-394807-6.00117-9
  • Kinzurik, M. I., Ly, K., David, K. M., Gardner, R. C., & Fedrizzi, B. (2017). The GLO1 Gene Is Required for Full Activity of O -Acetyl Homoserine Sulfhydrylase Encoded by MET17. ACS Chemical Biology, 12 (2), 414-421. 10.1021/acschembio.6b00815
    Other University of Auckland co-authors: Bruno Fedrizzi
  • McAtee, P. A., Richardson, A. C., Nieuwenhuizen, N. J., Gunaseelan, K., Hoong, L., Chen, X., ... Schaffer, R. J. (2015). The hybrid non-ethylene and ethylene ripening response in kiwifruit (Actinidia chinensis) is associated with differential regulation of MADS-box transcription factors. BMC Plant Biology, 1510.1186/s12870-015-0697-9
    Other University of Auckland co-authors: Robert Schaffer
  • Schaffer, R. J., Crowhurst, R. N., Hallett, I. C., Atkinson, R. G., Bulley, S. M., Montefiori, M., ... Allan, A. C. (2015). A genomics approach to understanding fruit characters. In H. Huang, Q. Zhang (Eds.) Acta Horticulturae 1096, 1096, 199-206. Dujiangyan, China: INT SOC HORTICULTURAL SCIENCE. 10.17660/ActaHortic.2015.1096.21
    Other University of Auckland co-authors: Robert Schaffer, Andrew Allan


Contact details

Primary office location

COMMERCE A - Bldg 114
Level 1, Room 117
New Zealand

Web links