In 2016 I  completed my PhD in Dr. Robin Cameron’s lab (McMaster University, Canada), where I studied phloem-mediated long-distance immune signalling induced by a bacterial pathogen in Arabidopsis thaliana. Feeling a need to branch out a little, I joined Dr. Sebastian Schornack’s group (Sainsbury Laboratory, University of Cambridge, UK) to study interactions between filamentous microbes and non-vascular early land plants. Our goal is to identify core developmental processes required for the colonization of early land plant tissues by filamentous microbes and to understand how these processes evolved into the defense and symbiotic programs employed by higher plants. 

Research Areas:
Biotic Interactions, Cell Biology, Evolution, Signals and Responses


Carella, P., and Schornack, S. (2017) Manipulation of bryophyte hosts by pathogenic and symbiotic microbes. Plant and Cell Physiology, pcx182,

Carella, P., Gogleva, A., Tomaselli, M., Alfs, C., and Schornack, S. (2017) Phytophthora palmivora establishes tissue-specific intracellular infection structures in the earliest divergent land plant lineage. bioRxiv (Pre-Print). doi:

Wilson, D.C., Kempthorne, C.J., Carella, P., Liscombe, D.K., and Cameron, R.K. (2017) Age-related resistance in Arabidopsis thaliana involves the MADS-domain transcription factor SHORT VEGETATIVE PHASE and direct action of salicylic acid on Pseudomonas syringae. Molecular Plant-Microbe Interactions.

Carella, P., Kempthorne, C.J., Wilson, D.C., Isaacs, M., and Cameron, R.K. (2017) Exploring the role of DIR1, DIR1-like, and other lipid transfer proteins during systemic immunity in Arabidopsis. Physiological and Molecular Plant Pathology 97: 49-57.

Carella, P., Wilson, D.C., Kempthorne, C.J., and Cameron, R.K. (2016) Vascular sap proteomics: providing insight into long-distance signaling during stress. Frontiers in Plant Science 7: 651. doi: 10.3389/fpls.2016.00651

Carella, P., Merl-Pham, J., Wilson, D.C., Dey, S., Hauck, S.M., Vlot, A.C., and Cameron, R.K. (2016) Comparative proteomics analysis of phloem exudates collected during the induction of systemic acquired resistance. Plant Physiol. 171: 1495-1510.

Isaacs1, M., Carella1, P., Faubert, J., Rose, J.K.C., and Cameron, R.K. (2016) Orthology analysis and in vivo complementation studies to investigate the role of DIR1 during systemic acquired resistance in Arabidopsis thaliana and Cucumis sativus. Frontiers in Plant Sci. 7: 566. doi: 10.3389/fpls.2016.00566

Cameron, R.K., Carella, P., Isaacs, M., Champigny, M.J., Merl-Pham, J., Dey, S., Vlot, A.C. (2016) Using DIR1 to investigate long distance signal movement during systemic acquired resistance. Canadian J. Plant Pathol 38: 19-24.

Carella, P., Wilson, D.C., and Cameron, R.K. (2015) Mind the gap: Signal movement through plasmodesmata is critical for the manifestation of SAR. Plant Signaling & Behaviour. 10: e 1075683 [Addendum to Carella et al. 2015, Plant Biology – Solicited by Editor, not peer reviewed]

Carella1, P., Wilson1, D.C., and Cameron, R.K. (2015) Some things get better with age: differences in salicylic acid accumulation and defense signaling in young and mature Arabidopsis. Frontiers in Plant Science 5:775. doi:10.3389/fpls.2014.00775.

Carella, P., Isaacs, M., and Cameron, R.K. (2015) Plasmodesmata-located protein (PDLP) overexpression negatively impacts the manifestation of systemic acquired resistance and the long-distance movement of DIR1 in Arabidopsis. Plant Biology. 17: 395-401.

Yeo1, M., Carella1, P., Fletcher, J., Champigny, M.J., Weretilnyk, E.A., and Cameron, R.K. (2015) Development of a Pseudomonas syringae–Eutrema salsugineum pathosystem to investigate disease resistance in a stress tolerant extremophile model. Plant Pathology. 64: 297-306.

Wilson, D.C., Carella, P., and Cameron, R.K. (2014) Intercellular salicylic acid accumulation during compatible and incompatible Arabidopsis-Pseudomonas syringae interactions. Plant Signalling & Behaviour. 9: e29362 [Addendum to Carviel et al. 2014, PLoS One – Solicited by Editor, Not peer reviewed]

Carviel1, J.L., Wilson1, D.C., Isaacs2, M., Carella2, P., Catana, V., Golding, B., Weretilnyk, E.A., and Cameron R.K. (2014) Investigation of intercellular SA accumulation during compatible and incompatible Arabidopsis-Pseudomonas syringae interactions using a fast neutron-generated mutant allele of EDS5 identified by genetic mapping and whole-genome sequencing. PLoS One. doi: 10.1371/journal.pone.0088608.

Champigny, M.J., Isaacs, M., Carella, P., Faubert, J., Fobert, P., and Cameron, R.K. (2013) Long distance movement of DIR1 and investigation of the role of DIR1-like during Systemic Acquired Resistance in Arabidopsis. Frontiers in Plant Science. 4: 230.

Wilson1 D.C., Carella1, P., Isaacs1, M., and Cameron, R.K. (2013) The floral transition is not the developmental switch that confers competence for the Arabidopsis age-related resistance response to Pseudomonas syringae pv. tomato. Plant Molecular Biology. 83: 235-246.

Current Affiliations
Experience & Education