student profile: Mr David Jeon


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Thesis work

Thesis title: Underlying mechanisms of the leaf development and morphogenesis

Supervisors: Mary BYRNE , Marcus HEISLER

Thesis abstract:

Plant leaves, one of the most obvious features of plants, are initiated from the shoot apical meristem and their diverse shapes are determined by leaf morphogenesis. In Arabidopsis thaliana, two major groups of transcription factor have been identified as crucial regulators of shoot apical meristem and/or leaf shape. First, the BEL1-LIKE HOMEODOMAIN (BLH) TALE protein family is a key member in various aspects of shoot development and/or leaf morphogenesis with functional redundancy in their family. Second, class I and class II of KNOTTED1-LIKE HOMEOBOX (KNOX) TALE protein families are required for meristem function and leaf shape, respectively. The role of individual BLH and KNOX genes is complicated by gene redundancies. My project has two aims. Firstly, I will determine which BLH proteins can function in place of the SAW1 protein. This will distinguish whether differences between BLH genes are only due to divergent protein sequence or whether they might be due to changes in where and when they are expressed. Secondly, I will determine how SAW genes modify leaf shape. For this, the clonal analysis will be conducted to characterise the spatiotemporal functioning of the specific BLHs in the leaf margin development. In addition, the possibility of the new BLH-KNOX interactions in leaf shape formation will be studied based on the new mutant I have found recently. Consequently, this study will provide an insight into the underlying mechanisms of the leaf development and morphogenesis with a better understanding of BLH and KNOX functions.

Selected publications

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Journals

  • Jeon, H., Cho, J., Park, E., Han, K., Choi, Y., Ko, J. (2016). Developing xylem-preferential expression of PdGA20ox1, a gibberellin 20-oxidase 1 fromPinus densiflora, improves woody biomass production in a hybrid poplar. Plant Biotechnology Journal, 14, 1161-1170. [More Information]
  • Cho, J., Nguyen, V., Jeon, H., Kim, M., Eom, S., Lim, Y., Kim, W., Park, E., Choi, Y., Ko, J. (2016). Overexpression of PtrMYB119, a R2R3-MYB transcription factor from Populus trichocarpa, promotes anthocyanin production in hybrid poplar. Tree Physiology, 36, 1162-1176. [More Information]
  • Park, E., Kim, H., Choi, Y., Lee, C., Nguyen, V., Jeon, H., Cho, J., Funada, R., Pharis, R., et al (2015). Overexpression of gibberellin 20-oxidase1 from Pinus densiflora results in enhanced wood formation with gelatinous fiber development in a transgenic hybrid poplar. Tree Physiology, 35(11), 1264-1277. [More Information]
  • Lee, D., Lee, I., Kim, K., Kim, D., Na, H., Lee, I., Kang, S., Jeon, H., Le, P., et al (2014). Expression of gibberellin 2-oxidase 4 from Arabidopsis under the Control of a Senescence-associated Promoter Results in a Dominant Semi-dwarf Plant with Normal Flowering. Journal of Plant Biology, 57(2), 106-116. [More Information]
  • Ko, J., Jeon, H., Kim, W., Kim, J., Han, K. (2014). The MYB46/MYB83-mediated transcriptional regulatory programme is a gatekeeper of secondary wall biosynthesis. Annals of Botany, 114, 1099-1107. [More Information]

2016

  • Jeon, H., Cho, J., Park, E., Han, K., Choi, Y., Ko, J. (2016). Developing xylem-preferential expression of PdGA20ox1, a gibberellin 20-oxidase 1 fromPinus densiflora, improves woody biomass production in a hybrid poplar. Plant Biotechnology Journal, 14, 1161-1170. [More Information]
  • Cho, J., Nguyen, V., Jeon, H., Kim, M., Eom, S., Lim, Y., Kim, W., Park, E., Choi, Y., Ko, J. (2016). Overexpression of PtrMYB119, a R2R3-MYB transcription factor from Populus trichocarpa, promotes anthocyanin production in hybrid poplar. Tree Physiology, 36, 1162-1176. [More Information]

2015

  • Park, E., Kim, H., Choi, Y., Lee, C., Nguyen, V., Jeon, H., Cho, J., Funada, R., Pharis, R., et al (2015). Overexpression of gibberellin 20-oxidase1 from Pinus densiflora results in enhanced wood formation with gelatinous fiber development in a transgenic hybrid poplar. Tree Physiology, 35(11), 1264-1277. [More Information]

2014

  • Lee, D., Lee, I., Kim, K., Kim, D., Na, H., Lee, I., Kang, S., Jeon, H., Le, P., et al (2014). Expression of gibberellin 2-oxidase 4 from Arabidopsis under the Control of a Senescence-associated Promoter Results in a Dominant Semi-dwarf Plant with Normal Flowering. Journal of Plant Biology, 57(2), 106-116. [More Information]
  • Ko, J., Jeon, H., Kim, W., Kim, J., Han, K. (2014). The MYB46/MYB83-mediated transcriptional regulatory programme is a gatekeeper of secondary wall biosynthesis. Annals of Botany, 114, 1099-1107. [More Information]

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.