Ms Melissa Joubert

PhD student


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Primary Supervisor
Velushka Swart

Co Supervisor
Noelani van den Berg

I am a doctoral candidate in the field of Microbiology, and I have been a member of FABI since 2016. I am currently part of the Avocado Research Programme (previously the Fruit Tree Biotechnology Programme), studying under the supervision of Professor Noëlani van den Berg and Dr. Velushka Swart.

I received my MSc. in Microbiology in 2020, as a member of the same research group. My Master's thesis was entitled "Identification and manual annotation of RxLR effector genes in Phytophthora cinnamomi". This research project was focused on identifying candidate RxLR effector genes from the P. cinnamomi genome, and specifically analysed those genes which were expressed during avocado infection. The results of this study highlighted several candidate RxLRs with putative virulence roles during infection of a susceptible avocado rootstock, paving the way for further research into these notable molecular weapons used by P. cinnamomi.

Currently I am working on my PhD. project entitled "Investigating molecular mechanisms for disease caused by Avocado sunblotch viroid (ASBVd)". This study aims to determine putative molecular mechanisms used by ASBVd to infect avocado trees. We are looking into ways that the viroid causes symptoms (and ultimately, disease) in avocado fruiting cultivars by investigating host responses to ASBVd infection.

Export to RIS
Joubert M, van den Berg N, Theron J, Swart V. (2024) Global transcriptomic analysis in avocado nursery trees reveals differential gene expression during asymptomatic infection by avocado sunblotch viroid (ASBVd). Virus Research 339:199263. 10.1016/j.virusres.2023.199263. PDF
Joubert M, van den Berg N, Theron J, Swart V. (2022) Transcriptomics Advancement in the Complex Response of Plants to Viroid Infection. International Journal of Molecular Sciences 23(7677) 10.3390/ijms23147677 PDF
Joubert M, Backer R, Engelbrecht J, Van den Berg N. (2021) Expression of several Phytophthora cinnamomi putative RxLRs provides evidence for virulence roles in avocado. PLoS ONE 16(7):e0254645. 10.1371/journal.pone.0254645 PDF