Research

Research interests

Plant organelles are extremely dynamic in terms of motility and morphology. For example in leaf epidermal cells, where most of the cytoplasm is confined to a thin peripheral layer due to the presence of a large vacuole, Golgi bodies can reach speeds of up to 8µm/s. Several classes of organelle such as peroxisomes, mitochondria and Golgi bodies undergo different types of movement such as uni and bidirectional, and appear to randomly stop and then go. The cortical ER is composed of a polygonal network of tubules. The tubules can readily grow, shrink and slide to form branch points, and convert into a cisternal 'sheet' form.

The almost chaotic and seemingly indiscriminate motion alters in response to changes in environmental stimuli, begging the question, does movement have a functional role?

My group is interested in characterising the molecular factors that control plant organelle movement and morphology. Organelle movement in higher plants is predominantly controlled by the actin cytoskeleton and myosin, the molecular motors that traverse actin. ER morphology is controlled in part by actin and myosin, and also by structural proteins called reticulons. By understanding these components and more, we can then start to address whether by affecting organelle movement and morphology, we can in turn affect organelle function and ultimately cell growth and maintenance.

Movement of ER (green) and Golgi bodies (red) in Arabidopsis leaf epidermal cells
(Sparkes et al. Biochem. J. 2009).

Research projects

External grants / funding:

2015 Leverhulme Trust grant, Principle Investigator on 'Biophysical and molecular characterisation of ER-organelle interactions in plants'.

2015 STFC programme access grant, Principle investigator on 'Biophysical and molecular characterisation of organelle movement and positioning in plant cells'.

2014 New Phytologist Symposium fund, Co-investigator on 'Developing interdisciplinary omics tools for organelle and cell type-specific analysis of plants’.

2014 Royal Society grant, Principle Investigator on 'Effects of temperature on organelle dynamics and interactions in plants'.

2012 STFC programme access grant, Co-investigator on 'The Plant Cell Initiative'.

2012 BBSRC grant Co-investigator on 'Putting the squeeze on PDs - reticulons, plasmodesmata and viral trafficking in plants'.

2011 BBSRC grant Principle Investigator on 'Characterisation of Arabidopsis myosin recruitment'.

Publications

Key publications | Publications by category | Publications by year

No publications found

External Engagement and Impact

Committee/panel activities

Royal Microscopy Society, Life Sciences committee member (elected member)

Editorial responsibilities

Review editor for Frontiers in Plant Cell Biology, and review manuscripts for The Plant Cell, Plant Journal, Plant Physiology, Traffic, Journal of Experimental Botany and New Phytologist.

Co-editor for special edition of Molecular Plant on 'Cellular dynamics' (2011)

Invited lectures

Linnean Society, Irene Manton lecture (2015)

Royal Microscopy Society, Botanical Microscopy conference, Exeter (2015)

Society for Experimental Biology annual meeting, Manchester (2014)

BioDynamics workshop, Exeter (2014)

Warwick University seminar series (2013)

IFR 87, Gif-Sur-Yvette, France (2013) The Plant and its environment

Knoxville University, USA (2011) NIMBIOS workshop ‘Mathematical modeling of intracellular movements’.

Texas A and M University, Texas, USA (2011) seminar series

University of Leeds, UK (2011) seminar series

University of Warwick, UK (2008) MOAC and systems biology centre seminar series

Teaching

Modules

2021/22

Information not currently available

Supervision / Group

Postdoctoral researchers

Postgraduate researchers

Alumni